ABSTRACTS BOOKLET OF

CIF24

CHITOSEI NTERNATIONALFORUM 2024
September 3 – 4, 2024
Chitose Inst. of Sci. & Tech. (CIST),
Chitose, Japan
Sponsors and support0

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ACCESS TO CIST
From JR Sapporo Station, 33 minutes by Rapid Airport train to MinamiChitose Station
From Minami-Chitose Station to the university, 9 minutes by free
shuttle bus. Thus, from Sapporo Station to CIST it takes a total of 42
minutes!
From Tomakomai, 19 minutes by local train to Minami-Chitose Station+ 9 minutes by free shuttle bus = a total of 28 minutes!

Free shuttle buses run from JR Chitose Station and Minami-Chitose
Station to the university. The bus timetable can be found on the next
page.
The free shuttle bus takes about 9 minutes from JR Minami-Chitose
Station and about 21 minutes from JR Chitose Station to arrive at theCIST. Get off at the main campus.

http://cif24.chitose.ac.jp✉ cif24@photon.chitose.ac.jp

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BUS TIMETABLE

Outward
Chitose Sta.
7:55
8:30
9:18
10:15
10:44
11:39
12:45
13:28
14:28
15:18
16:15
17:18
ReturnMAIN CAMPUS
10:45
11:34
12:22
13:07
14:00
14:56
16:07
16:47
17:17
17:53
18:29
18:59
19:29
20:13
21:08

Minami-Chitose
Sta.
8:05
8:40
9:28
10:25
10:54
11:49
12:55
13:38
14:38
15:28
16:25
17:28

RESEARCH
CAMPUS
8:13
8:48
9:36
10:33
11:02
11:57
13:03
13:46
14:46
15:36
16:33
17:36

MAIN CAMPUS

RESEARCH
CAMPUS
10:48
11:37
12:25
13:10
14:03
14:59
16:10
16:50
17:20
17:56
18:32
19:02
19:32
20:16
21:11

Minami-Chitose
Sta.
10:56
11:45
12:33
13:18
14:11
15:07
16:18
16:58
17:28
18:04
18:40
19:10
19:40
20:24
21:19

Chitose Sta.

http://cif24.chitose.ac.jp

8:16
8:51
9:39
10:36
11:05
12:00
13:06
13:49
14:49
15:39
16:36
17:39

11:06
11:55
12:43
13:28
14:21
15:17
16:28
17:08
17:38
18:14
18:50
19:20
19:50
20:34
21:29

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BY AIR

SectionTokyo (Haneda Airport) → New Chitose Airport
Osaka (Kansai International Airport) → New
Chitose Airport

Time required
Approx. 90 min.
Approx. 110 min.

BY CAR

Section
JR Minami-Chitose Station → Chitose Instituteof Science and Technology
New Chitose Airport → Chitose Institute of
Science and Technology
JR Chitose Station → Chitose Institute of
Science and Technology

Time required
Approx. 5 min.
Approx. 7 min.
Approx. 15 min.

The main campus is the venue for CIF24.

http://cif24.chitose.ac.jp✉ cif24@photon.chitose.ac.jp

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MAP OF SITE

Sub Entrance

Oral session room
Poster session area

Banquet room

http://cif24.chitose.ac.jp✉ cif24@photon.chitose.ac.jp

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URL FOR ONLINE PARTICIPATION
https://us06web.zoom.us/j/89700964939?pwd=Am9bEiQ9ZuA4Z7lT
DW9coD9VfsIRnl.1
Meeting ID: 897 0096 4939
Password: 134323

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PROGRAM
September 3 (Tue)13:00Opening
13:10
Welcome Address
Prof. Yoshikazu Miyanaga
President of Chitose Institute of Science andTechnology (CIST)
13:10Keynote Lecture
p.19
14:00
“Advanced Research Infrastructure for Accelerated
Biomaterials and Biodevices R&D”
Prof. Yoshinobu Baba, Nagoya University, Japan
14:0014:30
14:3014:55

Tree Planting, Group Picture, Coffee Break

14:5515:20

Invited lecture 2
p.23“Data-driven materials science study based on
atomic-resolution scanning transmission electron
microscopy imaging”
Dr. Kohei Aso, Assistant Professor, Japan
Advanced Institute of Science and Technology(JAIST)
Oral Presentation 1
p.25“Charge Transport and Thermoelectric Properties
in Electrochemically Doped Conducting Polymers”
Dr. Hisaaki Tanaka, Associate Professor, CIST

15:2015:35

16:0017:30
17:4519:30

Invited lecture 1
p.21“The rise of Materials Informatics: Infrastructure
to Materials Design”
Prof. Keisuke Takahashi, Hokkaido University

Poster Session
Banquet / continued Poster viewing

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September 4 (Wed)10:00Invited lecture 3
p.26
10:25
“Sequence-defined glycopolymers for biomedical
applications”
Prof. Laura Hartmann, Freiburg Universiy,Germany
10:2510:50

10:5011:05

11:0511:20

11:2011:35

11:3511:50

11:5013:00

Invited lecture 4
p.27“Photoswitchable Bioactive Glass for Calcium
Control in Enamel Remineralization”
Dr. Enrique Ezra, Assistant Professor, Health
Sciences University of Hokkaido
Oral Presentation 2 (Online)
p.29“Fabrication of VO2 micro/nanostructures bylaser-induced hydrothermal synthesis”
Dr. Christophe Pin, Okinawa Institute of Scienceand Technology
Oral Presentation 3
p.30“Chitin-chitosan hybrid materials: Effect ofcrosslinking type and density on mechanicalproperties”
Leonard Genin, Universität Potsdam, Germany
Oral Presentation 4
p.31“Controlled
drug-releasablenovel
dentalrestorative composite materials using nanostructured silica particles”
Prof. Shigeaki Abe, Nagasaki University
Oral Presentation 5
p.32“Photopharmacology:
Fundamentals
andApplications”
Dr. P. K. Hashim, Assistant Professor, Hokkaido
University
Lunch

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13:2513:50

13:5014:05

14:0514:20

14:2014:35

14:3514:50

14:5015:10
15:1015:25

Invited lecture 5“Studying transcription factor networks to unlock
the production of phytoalexins in plants”
Dr. Nik Kovinich, Associate Professor, York
University, Canada
Invited lecture 6“Quantum emitters and hybrid integration”
Prof. Andreas W. Schell, Johannes Kepler
University Linz, Austria
Oral Presentation 6“Nanophotonics
forphotonic
quantumtechnology”
Dr. Hideaki Takashima, Associate Professor, CIST
Oral Presentation 7“Analysis of the barnacle exploratory behavior on
precisely controlled different functional groupsurfaces by video analysis”
Shota Asano, CIST
Oral Presentation 8“Corrosion resistance of Al materials after
anodizing and pore sealing treatments under highhumidity and temperature”
Maho Yamaguchi, National Institute of Technology
Asahikawa College
Oral Presentation 9“Near-infrared
responsive
soft
actuators
consistingofthermosensitivegels
andphotothermal
conversion
materials
withwavelength selectivity”
SatoshiWatanabe,
National
InstituteofTechnology Tomakomai College
Coffee Break

p.33

p.35

p.37

p.38

p.39

p.40

Oral Presentation 10 (Online)
p.41“Research on Automation of Learning Support
Advising using Large Language Model”
Kana Sunahara, CIST

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15:4015:55

15:5516:10

16:1016:30
16:10
16:20

p.42
Oral Presentation 11 (Online)“Research on Visualization of Learning Reflection
Data for Competency Evaluation”
Rin Sano, CIST
Oral Presentation 12 (Online)
p.43“Research on Feature Detection from Time-Series
Variations in Ultrasound Video Images”
Keisuke Hirakawa, CIST
Oral Presentation 13 (Online)
p.44“Construction of Waste-battery Classification
System using Generative Machine Learning
Modeling”
Ryusei Shihara, CIST
Closing
Student poster and oral presentation award
Closing Remarks
Prof. Olaf Karthaus, Chairperson of CIF24

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POSTER PRESENTATIONS
P1“Foam material preparation of natural and synthetic ｐ.45
polymers”
Taiyo Nagai1, Olaf Karthaus1*
1 Grad. Sch. of Sci. and Tech., CIST (Japan)

P2“Evaluation of chitosan decomposition by mold”
Akihiro Mizuyma1, Tomohisa Suzuki1, Taiyo Nagai1,
Olaf Karthaus1*
1 Grad. Sch. of Sci. and Tech., CIST (Japan)“Basic research for the preparation of alternative
materials for plastics of Fomes Fomentarius”
Ryuya Abe1, Tomohisa Suzuki1, Olaf Karthaus1*
1 Grad. Sch. of Sci. and Tech., CIST (Japan)“Microscopic structure of VUV-irradiated cycloolefinpolymer
substrates
bytransmission
electronmicroscopy and spectrum imaging”
Koichi Higashimine1*, Shoko Kobayashi1, Taro
Arimoto2,3
1 JAIST (Japan), 2 Ushio Inc. (Japan), 3 Osaka Univ.
(Japan)“Examination of a Water Filter Containing Populus alba
Leaves”
Konoha Ueda1, Shinon Takahashi1, Yoshihiko Omura2,
Chiharu
Hayashida3,
Hiroshi
Kunimori3,
Olaf
Karthaus1*
1 CIST (Japan), 2 Omura Toryo Inc. (Japan), 3 Aoya
Washi Koubou (Japan)“Surface modification of nanofibrillated bacterial
cellulose: anionization by TEMPO-catalyzed oxidation”
Hijiri Takeda1, Ryota Kishimoto1, Sayaka Fujita1,
Hiroyuki Kono1*
1 NIT, Tomakomai Col. (Japan)“Biodegradable resin composites reinforced with thenanofibrillated bacterial cellulose”
Airi Yokokawa1, Kennosuke Takaya1, Hiroyuki Kono1*
1 NIT, Tomakomai Col. (Japan)

P3

P4

P5

P6

P7

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P8

P9

P10

P11

P12

P13

“Formation of novel crystalline chitin nanoribbons by
self-assembly of chitin oligohexamer in aqueous
solution”
Ayumu Izutsu1, Yuya Nagaoka1, Takeshi Hattori2, Taiiti
Usui3, Takuya Isono4, Makoto Ogata2, Hiroyuki Kono1*
1 NIT, Tomakomai Col. (Japan), 2 Fukushima Univ.
(Japan), 3 Shizuoka Univ. (Japan), 4 Hokkaido Univ.
(Japan)“Selective
synthesisofconductive
graphitic
nanomaterials using local laser-heating”
Hideki Fujiwara1, Christophe Pin2, Hideo Kaiju3, Kenji
Hirai4, Hiroshi Uji-i4,5
1 Hokkai-Gakuen Univ. (Japan), 2 OIST (Japan), 3 Keio
Univ. (Japan), 4 Hokkaido Univ. (Japan), 5 KU Leuven(Belgium)“Effect of Biomorphic Design Elements of Virtual
Environment on Virtual Walking”
Misuzu Hasegawa1, Mana Nakai1, Daiji Kobayashi2
1 Grad. Sch. of Sci. and Tech., CIST (Japan), 2 CIST
(Japan)“Impact of External Human-Machine Interface on
Pedestrian Situation Awareness in Autonomous Delivery
Vehicle Scenarios”
Yuga Kato1, Daiji Kobayashi2
1 Grad. Sch. of Sci. and Tech., CIST (Japan)), 2 CIST
(Japan)“Virtual Training Workspaces for Assembly Workers: A
Case Study on Office Chair Assembly”
Naomi Kuwata1, Ryusei Fukuda1, Daiji Kobayashi2
1 Grad. Sch. of Sci. and Tech., CIST (Japan)), 2 CIST
(Japan)“Comprehensive analysis of metabolic pathways
involving MBW-transcriptional complex in Marchantia
polymorpha”
Akari Harada1, Haruka Arai2, Kazuya Yanagiura2,
Kengo Morohashi1
1 Grad. Sch. of Sci. and Tech., CIST (Japan)
2 Tokyo Univ. of Sci., (Japan)

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P14 “Developing a novel method for protein identification
using RNA aptamer”
Yuma Ogata1, Kengo Morohashi1
1 Grad. Sch. of Sci. and Tech., CIST (Japan)
P15 “Towards the development of odor biosensors:
Evaluation of gene expression responses in Escherichia
coli to a volatile organic compound by a novel aerationculture based system”
Riki Inui1, Taiga Kamio2, Kengo Morohashi1,2
1 Grad. Sch. of Sci. and Tech., CIST (Japan)
2 Tokyo Univ. of Sci., (Japan)
P16 “Attempts to identify target proteins of polyphenols”
Ami Yakushijin1, Kengo Morohashi1
1 Grad. Sch. of Sci. and Tech., CIST (Japan)
P17 “An Integrated Network Analysis to Exploring the
Potential of Flavonoid Combinations in Food for Druglike Effects”
Koyo Fujisaki1, Osei Horikoshi2, Yukitoshi Nagahara2,
Kengo Morohashi1*
1 CIST (Japan), 2 Tokyo Denki Univ. (Japan)
P18 “Output light emitted from POF cutting-faces finished bydifferent facet terminations”
Akaru Okazaki1, Kotaro Takahashi1, Kimio Oguchi2,
Masashi Eguchi1*
1 CIST (Japan), 2 NTUST (Taiwan)
P19 “Developing a GUI for experimental design with
Bayesian optimization and case study”
Yoshiki Hasukawa1, Mikael Kuwahara1, Lauren
Takahashi1, Keisuke Takahashi1
1 Hokkaido Univ. (Japan)
P20 “Designing Catalyst Descriptors for the Water-Gas Shiftand the Oxidative Coupling of Methane Reactions”
Fernando Garcia-Escobar1, Keisuke Takahashi1
1 Hokkaido Univ. (Japan)

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P21 “Effect of the chemical bonding state on the porous
carbon surface on the persulfate activation anddecomposition of organic dyes”
Ryusuke Urushidate1, Shuhei Shimoda2, Keita Suzuki3,
Atsushi Fukuoka2, Ken-ichi Shimizu2, Tomoya Takada1
1 CIST (Japan), 2 Institute for Catalysis, Hokkaido Univ.
(Japan), 3 Faculty of Engineering, Hokkaido Univ.
(Japan)P22 “Antimicrobial Substances Produced by Broccoli
Infected with Soft Rot”
Shota Doigawa1, Kinto Okoshi1*
1 CIST (Japan)
P23 “Nanopatterning Using the Smectic Phase of Rod-LikePolymers as a Template”
Johanna Beck1, Yoshitaka Sugiyama1, Kento Okoshi1*
1 CIST (Japan)
P24 “Structural Study on Rod-Coil-Coil Block Copolymers
with polyacetylene as the hard segment”
Takaharu Onishi1, Kento Okoshi1*
1 CIST (Japan)
P25 Heterogeneous Structure in PMMA Synthesized by Bulk
Polymerization
Natsuki Suehiro1, Kento Okoshi1*
1 CIST (Japan)
P26 “Formation of Unique Structure Expressed in Coil-RodCoil Block Copolymers”
Tatsuhiro Kojima1, Kento Okoshi1*
1 CIST (Japan)
P27 “Study of ZMP-Disturbance Estimation Based on Imagebased Visual Servo for Biped Robot”
Konosuke Ichiba1, Naoki Oda1
1 CIST (Japan)
P28 “Development of 7DOF Redundant Robot Arm Equippedwith Twin Drive System”
Naruki Sugawara1, Naoki Oda1
1 CIST (Japan)

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P29 “Synthesis of Vinylidenecyclopropanes via Gold(I)Catalyzed Cyclopropanation of Vinyl Arenes”
Hiroto Mori1, Yusuke Ono1, Shota Nakagawa1, Sota
Akima1, Miki Murakami2, Toshinobu Korenaga3,
Tadashi NakajiHirabayashi2, Yoshikazu Horino*1
1 CIST (Japan), 2 Grad. Sch. of Sci. and Eng., Univ. of
Toyama (Japan), 3 Iwate Univ. (Japan)
P30 “Stereoselective Synthesis of (Z)-anti-Homoallylic
Alcohols Using Palladium-Catalyzed Three-Component
Reaction”
Ayumu Natsubori1 and Yoshikazu Horino*1
1 CIST (Japan)
P31 “Synthesis of 2-Vinylnapthalenes via Gold(I)-Catalyzed
Cyclopropanation of Indenes”
Shota Nakagawa1, Yoshikazu Horino*1
1 CIST (Japan)
P32 “Transition-Metal-Free Synthesis of Homopropargylic
Alcohols”
Haruya Hirano1, Yoshikazu Horino*1
1 CIST (Japan)
P33 “Synthesis of new reusable cage-shaped phosphine
ligands”
Mizuki Oda1, Yoshikazu Horino*1
1 CIST (Japan)
P34 “Evaluation of Source Code that Includes Perspectivesof Ease of Handover Measured by Class Cohesion”
Mayu Sudo1, Hiroto Yamakawa1
1 Grad. Sch. Sci. Tech., CIST (Japan)
P35 “Development and Implementation test of LTI Gateway
System to Improve Interoperability of Educational
Systems”
Toshinobu Kamada1, Hiroto Yamakawa1
1 Grad. Sch. of Sci. and Tech., CIST (Japan)
P36 “Investigation of the inactivation effects of different UV
intensity at 213 nm and irradiation time”
Tatsuro Kagawa1, Kazuhiro Dainaka1, Nobuhiro
Umemura1
1 CIST (Japan)

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P37 “Elucidation of anomalous fluorescence properties of
2,4-bis(1,3-benzothiazolylphenol derivatives”
Yuma Hirose1, Haruto Yamakawa1, Ken-ichi Sakai1,
Tomoyuki Akutagawa2
1 CIST (Japan), 2 IMRAM, Tohoku Univ. (Japan)
P38 “Analysis of the Aggregated Structure of C3-Symmetric
Molecules with a Cyclic Hydrogen Bonding Network”
Akihiro Kakiyama1, Manami Uemura1, Ken-ichi Sakai1,
Tomoyuki Akutagawa2
1 CIST (Japan), 2 IMRAM, Tohoku Univ. (Japan)
P39 “Thermal and Fluorescence Properties of Methyl
Salicylate Derivatives with an Anchor Site for SelfAssembling”
Kei Kobayashi1, Ken-ichi Sakai1, Takashi Nakanishi2
1 CIST (Japan), 2 NIMS (Japan)
P40 “Performance Verification of an RSSI Indoor
Localization Technique using a Two-Step Estimation
Algorithm”
Reiya Muraguchi1, Yasuhiro Takano1, Hsuan-Jung Su2,
Yoshiaki Shiraishi3
1 CIST (Japan), 2 NTU (Taiwan), 3 Kobe Univ. (Japan)
P41 “A Survey on Colorization Techniques for Near-Infrared
Images”
Shunsuke Shimada1, Yasuhiro Takano1, Yoshiaki
Shiraishi2
1 Grad. Sch. of Sci. and Tech., CIST (Japan), 2 Grad.
Sch. of Eng., Kobe Univ.(Japan)
P42 “Control of Photoinduced Electron Transfer via
Supramolecular Complex Formation of Polymers with
Electron-Donor Molecules”
Hiroyasu Yamaguchi1*, Yilin Cao1, Hikaru Sotome2,
Syoji Ito2
1 Grad. Sch. of Sci., Osaka Univ. (Japan), 2 Grad. Sch.
of Eng. Sci., Osaka Univ. (Japan)

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P43 “Functionalization of Supramolecular Complexes by
Hybridization of Transition Metal Complexes with
Biomolecules”
Hiroyasu Yamaguchi1*, Yuichiro Kobayashi1, Akira
Harada2
1 Grad. Sch. of Sci., Osaka Univ. (Japan), 2 SANKEN,
Osaka Univ. (Japan)
P44 “Convex-tape Driven Parallel Robot For 3D Shape
Reconstruction”
Reo Yamada1*, Hirooki Aoki1
1 Grad. Sch. Sci. Tech., CIST (Japan), 2 CIST (Japan)
P45 “Proposal for estimating the Volume of Cherry
Tomatoes by 3D Image Measurement”
Shimpei Okado1, Hirooki Aoki2
1 Grad. Sch. Sci. Tech., CIST (Japan), 2 CIST (Japan)
P46 “Sample preparation for characterizing soft and hardtissues using Fourier transform infrared spectroscopy inattenuated total reflection mode”
Miu Murao1, Hiromi Kimura-Suda1
1 Grad. Sch. Sci. Tech., CIST (Japan)
P47 “Single-Shot Chirped Pulse Phase-Shifting Digitalholography for Capturing Ultrafast Optical Wavefront
Sequences”
Wataru Fukuda1*, Naoki Karasawa1
1 Grad. Sch. Sci. Tech., CIST (Japan)
P48 “Corrosion protection of damaged metal covered with
self-healing coating in freezing situation”
Runa Hiraki1*, Rin Takada1, Kanon Kato1, Makoto
Chiba1*
1 NIT, Asahikawa col. (Japan)
P49 “Shape transient of defect formed on self-healing
coatingfor corrosion protection of substrate metal”
Shin Tamura1*, Rin Takada1, Jotaro Sato1, Makoto
Chiba1*
1 NIT, Asahikawa col. (Japan)

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P50 “Corrosion morphology of aluminum formed during
wet-dry cycling tests with solution containing anions”
Saki
Kawashima1,
KoharuHigashide1,
Fuka
Kawamura1, Koki Saito1, Keishou Nishida1, Makoto
Chiba1*
1 NIT, Asahikawa col. (Japan)
P51 “Difference of Corrosion Morphology between that ofPure Iron during Immersion and Wet-Dry Cycling Tests”
Reina Shibata1, Fuka Kawamura1, Koki Saito1, Makoto
Chiba1*
1 NIT, Asahikawa col. (Japan)
P52 “Development of medical adhesive materials withremovability by external stimulation”
Eri Seitoku1, Sirus Safaee1, Mahdis Nesabi1, Ko
Nakanishi2, Yuko Era3, Alireza Valanezhad1, Shigeaki
Abe1*, Tomoya Takada4, Hiroshi Murata1, Ikuya
Watanabe1
1 Grad. Sch. of Biomed. Sci., Nagasaki Univ. (Japan), 2
Hokkaido Univ. (Japan), 3 Saitama Prefectural Univ.
(Japan), 4 Grad. Sch. of Sci. and Tech., CIST (Japan)
P53 “Effects of tree species on nitrogen deposition in forest
stands around the livestock area”
Masaharu Kato1, Jun’ichiro Ide1, Izuki Endo1
1 CIST (Japan)
P54 “Low-cost maskless lithography process for flexible
devices”
Yuzuki Mikami1, Gakuto Ito1, Makito Haruta1
1 CIST (Japan)
P55 “Development of the deep brain imaging device with the
FOP probe”
Ryusei Yago1, Makito Haruta1
1 CIST (Japan)
P56 “Development of microchannels to integrate with asemiconductor sensor for Aquaponics”
Airi Fukuhara1, Ryusuke Sakuma1, Iria Ito1, Makito
Haruta1
1 CIST (Japan)

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COMMITTEE
Honorary Chair
General Chair
Secretary General
Technical Program
Committee

Poster session
Financial Committee
Media+Zoom
Local Arrangement
Committee
Publishing Committee
Publicity CommitteeAward Committee:

Yoshikazu Miyanaga, President, CIST
Olaf Karthaus, CIST
Tomoya Takada, CIST
Masanori Wakizaka, CIST
Hirooki Aoki, CIST
Hiroshi Fukuda, CIST
Keiichi Kawano, CIST/ARIM
Makito Haruta, CIST
Makito Haruta, CIST
Akihiro Shoji, CIST
Shino Chiba, CIST
Yuji Hirai, CIST
Yuji Hirai, CIST
Hisaya Oda, CIST
Tsuyoshi Kurashima, Photonics World
Consortium
Shigeki Hagihara, CIST
Hisaya Oda, CIST
Katsufumi Ohsumi, Nagoya
University/ARIM
Keiichi Nakamoto, Institute for Molecular
Science/ARIM Yasutaka Matsuo, Hokkaido
University/ARIM
Tamami Maruyama, National Institute ofTechnology, Hakodate College
Akihito Iguchi, Muroran Institute ofTechnology
Makoto Chiba, National Institute ofTechnology, Asahikawa College
Mio Suzuki, National Institute ofTechnology, Kushiro College
Takashi Yasui, Kitami Institute ofTechnology
Hiroyuki Kono, National Institute ofTechnology, Tomakomai College
Kento Okoshi, CIST

*CIST: Chitose Institute of Science and Technology*ARIM: Advanced Research Infrastructure for Materials and Nanotechnology in Japan

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25

Oral Presentation 1

Charge Transport and Thermoelectric Properties in Electrochemically
Doped Conducting Polymers
Hisaaki Tanaka
Department of Applied Chemistry and Bioscience, Chitose Institute of Science andTechnology, 066-8655, Japanh-tanaka@photon.chitose.ac.jp
Conducting polymers have been attracting much interest in terms of both scientificand technological viewpoints. Owing to the highly sophisticated material designs, various
new high-mobility polymers have been synthesized with the carrier mobility approaching,or even exceeding, 1 cm2/Vs. Carrier doping on such high-mobility polymers can thus
cultivate various new applications such as wearable thermoelectric generators. However,charge transport mechanisms in these polymers have not been fully understood yet,especially in their doped states, due to the highly complicated film structure consisting ofboth crystalline domains and domain boundaries.
In the present talk, we introduce our recent studies on the charge transport andthermoelectric properties of electrochemically-doped semicrystalline polymers [1]. We
adopt an electrolyte gating method, schematically illustrated in Figure 1a, to sensitively
control the doping level up to high concentration regions by applying external gate
voltages. We observed that a typical semicrystalline polymer PBTTT (Fig. 1a) underwent
a macroscopic metal-like transition upon doping as shown in Fig. 1b, associated with apeak of the thermoelectric power factor, consistent with the recent theoretical studies. The
structural optimization by DFT calculations revealed that the planarity of the polymer
backbone was improved by the doping, promoting the inter-domain charge transport,
which should be a key to realize macroscopic metal-like charge transport insemicrystalline polymers. We will also introduce our recent trial to extract the mobility
in such electrochemically doped polymer films.

Figure 1. (a) Chemical structures of PBTTT and the electrolyte [DEME][TFSI] together
with the schematic illustration of the device structure. (b) Temperature dependence ofthe electrical conductivity (V) obtained at various gate-voltages.
References
1 H. Tanaka, K. Kanahashi, N. Takekoshi, H. Mada, H. Ito*, Y. Shimoi, H. Ohta, T.
Takenobu, Sci. Adv. 6, eaay8065 (2020).

26

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27

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28

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29

Oral Presentation 2

Fabrication of VO2 micro/nanostructures by laser-inducedhydrothermal synthesis
Christophe Pin1*, Hideki Fujiwara2 and Keiji Sasaki3
1

Light-Matter Interactions for Quantum Technologies Unit, Okinawa Institute of
Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
2
Faculty of Engineering, Hokkai-Gakuen University, 1-1, Nishi 11, Minami 26,
Chuo-ku, Sapporo, Hokkaido, 064-0926, Japan
3
Research Institute for Electronic Science, Hokkaido University, Kita 20, Nishi 10,
Kita-ku, Sapporo, Hokkaido, 001-0021, Japan
christophe.pin@oist.jp
Vanadium dioxide (VO2) has been intensively studied and used for its insulator-to-metal
phase transition close to room temperature (~ 68 oC).1,2 It is material of particular interest for
designing nanoscale switching devices with highly tunable electronic and optical responses.
Integrated VO2 micro/nanostructures are usually fabricated using conventional top-down
fabrication techniques.2 To reduce the fabrication costs and enable the fabrication of more
complex nanostructures, cost-effective, bottom-up fabrication techniques enabling wellcontrolled material synthesis are needed. Although solvothermal/hydrothermal synthesis of VO2nanoparticles, nanowires, and nanosheets has been reported,2 the assembly and integration ofdispersed nanomaterials in devices requiring nanoscale precision remains challenging.
We demonstrate here the laser-induced hydrothermal synthesis of VO2 micro/nanostructures
on gold thin films and gold nanostructures.3,4 A 1064 nm infrared laser beam was focused onto
the gold film/nanostructures at the surface of a glass substrate immersed in the precursor solution5.
1μm-large VO2 structures were fabricated by locally heating a 30nm-thick alumina-coated gold
film. It was found that the generation of a microbubble results in an improved crystallization of
the synthesized material. VO2 was similarly synthesized at the surface of gold nanodisks andnanorods. Enhanced, localized, polarization-controlled photothermal heating of the gold
nanostructures was achieved via the excitation of localized surface plasmon resonances (LSPR),
demonstrating efficient VO2 synthesis by plasmon-assisted hydrothermal synthesis.4

References
1 Z. Shao, X. Cao, H. Luo, P. Jin, NPG Asia Mater. 10, 581–605 (2018).
2 V. Devthade, S. Lee, J. Appl. Phys. 128, 231101 (2020).
3 H. Fujiwara, T. Suzuki, R. Niyuki, K. Sasaki, New J. Phys. 18, 103046 (2016).
4 H. Fujiwara, T. Suzuki, C. Pin, K. Sasaki, Nano Lett. 20, 389–394 (2019).
5 R. Shi, J. Wang, X. Cai, L. Zhang, P. Chen, S. Liu, L. Zhang, W. Ouyang, N.
Wang, C. Cheng, J. Phys. Chem. C 121, 24877–24885 (2017).

30

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!  %   ! $     
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31

Oral Presentation 4

Controlled drug-releasable novel dental restorative composite
materials using nano-structured silica particles
Yuko ERA1, Sirus SAFAEE2, Mahdis NESABI2, Sayaka IWATA2, Masahiro
ENDO2, Mizuki KINJO2, Atsushi HYONO3, Shigeaki ABE1,*, Mariko
NAKAMURA4, Hiroshi MURATA1 and Ikuya WATANABE1
1

2

Saitama Prefectural University, Kawagoe 343-8540, Japan
Graduate School of Biomedical Science, Nagasaki University, Nagasaki 095-8102,
Japan
3
National Institute of Technology, Asahikawa College, Asahikawa 072-8142, Japan
4
Kyushu University of Medical Science, Nobeoka 882-8508, Japansabe_den@nagasaki-u.ac.jp

Recently, nano-structured materials have been received much attention by many

researchers. Their nano scaled structures induce large surface area and reactive
surfaces. Nano porous silica particles (NPS) is a typical nano-structured material. They
have numerous of nano-pore with several nm in diameter. The nano-pore can beapplied for capture-release molecule systems, such as drug molecules. Therefore, we
prepared NPS contained dental resin composite (RC), and then investigated in theirmolecules-release properties to apply them for a newly drug-release systems. 15 mg of
NPS was mixed into 0.3 g of RC paste (5 wt% at concentration), then specimen (I10x 1 nm) were prepared by light-cure. The obtained specimen was immersed to 1 wt%
of model-drug aqueous solution for 24 hrs. After immersion, the sample was immersed
to distilled water for a week. Then the samples were moved to a new distilled water
every week. The samples can release the model-drugs with positive charge for several
weeks. In contrast, RC without NPS sample eluted lower amount of the compounds
compared with NPS-RC and the amount deceased rapidly. In case of negative charged
one, the released amount also decreased rapidly. The results suggested to apply for a
newly drug-released dental materials.

32

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33

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35

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& 1 0('""(  (  00)( " "  * .345773-!.4

37

Oral Presentation 6

Nanophotonics for photonic quantum technology
Hideaki Takashima1
1

Chitose Institute of Science and Technology,758-65, Bibi, Chitose, Hokkaido, 066-8655, Japanh-takash@photon.chitose.ac.jp

Nanophotonic devices coupled with single-photon emitters have been attracted attention
to realize photonic quantum information technology, such as photonic quantum
computers, quantum networks, and quantum sensors. As the nanophotonic devices, wehave recently developed nanofiber Bragg cavities (NFBCs), which are optical nanofibers
embedded a microcavity in it [1, 2, 3, 4]. NFBCs can realize the high coupling efficiencyof photons into single-mode fibers [1, 2]. They can also ultra-widely tune more than 20
nm resonant wavelengths by applying mechanical tension [1, 4]. Here, we report the
fabrication method of the NFBCs with the high-quality factor using a helium-focused ion
beam. Besides these results, we will report our recent results on the NFBCs.
We gratefully acknowledge financial support from JSPS KAKENHI Grants (Nos.
24H00195, 21H04444, 26220712, 23K22426, and 19K03686), JST CREST(JPMJCR1674), JST PRESTO (JPMJPR2257), MEXT Q-LEAP (JPMXS0118067634),
JSPS Bilateral Program Number JPJSBP120242003, and a research granted from Murata
Science and Education Foundation. A portion of this work was supported by the“Nanotechnology Platform Project” of MEXT (Nanotechnology Open Facilities in Osaka
Univ.).
References
1. A. W. Schell, H. Takashima, S. Kamioka, Y. Oe, M. Fujiwara, O. Benson and S.
Takeuchi, Sci. Rep., 5, 9619 (2015).
2. H. Takashima, M. Fujiwara, A. W. Schell, and S. Takeuchi, Opt. Express, 24, 15050(2016).
3. H. Takashima, A. Fukuda, H. Maruya, T. Tashima, A. W. Schell, and S. Takeuchi,
Opt. Express, 27, 6792 (2019).
4. H. Takashima, A. W. Schell, and S. Takeuchi, Opt. Express, 31, 13566 (2023).

38

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39

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40

Oral Presentation 9

Near-infrared responsive soft actuators consisting of thermosensitivegels and photothermal conversion materials with wavelength selectivity
Satoshi Watanabe1, Kazuki Arikawa2, Hiroshi Era2, Masashi Kunitake2
1

Division of Applied Chemisty and Biochemistry, Tomakomai KOSEN,
Tomakomai city, Hokkaido 059-1275, Japan.
2
Department of Material Science and Applied Chemistry, Kumamoto University
watasato@tomakomai-ct.ac.jp
Near-infrared responsive soft actuators of thermosensitive gels and photothermal
conversion nanofillers have attracted much attention for applying micromachines inbioliving. However, conventional nanofillers such as graphene and carbon nanotubes
limit control of the actuators to the optical scanning which does not work on
micromachines. In this study, we demonstrate wavelength selective control systems byreplacing conventional photothermal conversion materials with lanthanoid materials
having narrow bandwidths, high durability, and being harmless to bio living.
Thermosensitive gels and lanthanoid materials were composited by the calcinationfree1 or complexation crosslinking2 techniques. Figure 1 shows photographs of the soft
actuators in water at 30 °C (b) without and under light irradiation at (a) 808 nm and (c)980 nm, respectively. The 808 nm irradiation got the bending motion of the Nd2O3 nanoparticle-incorporated part of the actuators. After turning off the light, the actuator
returned to the original shapes. The 980 nm irradiation got the bending motion of the
Yb2O3-nanopaticle-incorporated part of the actuators. The repeated experiments yielded
the same responses and gave no damage of the gels and the lanthanoid materials.
(a) ON @ 808 nm(c) ON @ 980 nm(b) OFFϱŵŵŚĞĂƚĞĚ

ŚĞĂƚĞĚ

^ŚƌŝŶŬŝŶŐŐ
WE/Wŵ

Figure 1. Photographs of the soft actuators in water at 30 °C (b) without and under lightirradiation at (a) 808 nm and (c) 980 nm, respectively.
References
1 S. Watanabe, Adv. Funct. Mater. 21, 4264 (2011); 25, 4390 (2015).
2 S. Watanabe, Chem. Lett. 49, 1111 (2020); Soft Smart Mater. submitted (2024).

41

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42

Oral Presentation 11

Research on Visualization ofGLearning Reflection DataG
for Competency Evaluation
Rin Sano1, Haruki Ueno2 and Hiroshi Komatsugawa1
1

Graduate School of Science and Engineering, Chitose Institute of Science andTechnology, Chitose 066-8655, Japan
2
Chitose Institute of Science and Technology, Chitose 066-8655, Japan
m2240250@photon.chitose.ac.jp

We analyze and visualize the tendency of teachers' evaluation and the characteristics oflearners' reflections based on learning reflection data. In previous study, we used machinelearning modeling to extract the evaluation viewpoint based on tacit knowledge, which
depends on the teachers’ experience in education, from a large dataset of learningreflections. In this study, we develop a feedback sheet for teachers and learners(Figure 1) as an effective tool for data analysis and visualization of competency
evaluation. The feedback sheet provides the results of the analysis of teachers' evaluation
tendency towards all learners and evaluation result for each learner. We investigatedvalidity of the contents of the sheet through the interview for teachers at the institutions.

Figure 1. a part of feedback sheet for teachers(left) and for learners (right)
G
References
1 Allen Momiji, Mitsuru Kawazoe and Hiroshi Komatsugawa:Analysis of Teachers ’Tacit Knowledge-based Evaluation of Learner Competencies
Using Machine Learning Approach,
IIAI2023 To be published
2 Tanizuka et al:ࠗᩍ⫋㹣࣏࣮ࢺࣇ࢛ࣜ࢜ࡢά⏝࡟ࡼࡿᩍ⫱ᐇ⩦⏕ࡢ⮬ᕫホ౯࠾ࡼࡧ┦஫ࢥ࣓ࣥࢺࡢຠᯝ࠘, ᪥ᮏᩍ⫱ᕤᏛ఍ㄽᩥㄅ, 39ᕳ3ྕ p.235-248 (2015),
https://www.jstage.jst.go.jp/article/jjet/39/3/39_39041/_pdf/-char/ja43

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Oral Presentation 13

Construction of Waste-battery Classification System using Generative
Machine Learning Modeling.
Ryusei Shihara and Hiroshi Komatsugawa
Graduate School of Science and Technology, Chitose Institute of Science andTechnology 758-65 Bibi, Chitose, Hokkaido, Japan
M2230180@photon.chitose.ac.jp
At recycling sites, waste batteries are manually classified by skilled workers according
to differences in shape, labeling, dirt, and damage. With the recent advances in image
recognition by AI, it is expected to improve the efficiency of manual work throughautomatic detection and classification. However, collecting enough data on waste
batteries to train AI is not easy due to legal regulations.
In this study, we aim to construct an object detection model for waste batteries
characterized by the augmentation of the data using an image generation model, while theactual small dataset. For this purpose, data augmentation is performed using Stable
Diffusion [1], which can generate and convert images from text descriptions. Specifically,
additional training is performed on the pre-trained model of Stable Diffusion using a small
amount of captured waste battery data. Subsequently, a large number of images are
generated for training the object detection model to classify waste batteries.
We verified whether the constructed model (hereafter referred to as the “generated
image learning model; GLM”) could handle waste batteries. Based on the study in [2],we constructed an object detection model trained only on new battery data (hereafterreferred to as the “existing model; EM”) for comparison with the results of the GLM.
Using these models, we flowed waste batteries with various dirt on a conveyor belt andverified how many could be detected. In this process, the camera was set to capture thelabel. Using 2642 frames obtained from 60 batteries, detection was performed with eachmodel. As a result, the GLM detected 2345 frames (88.76%), while the EM detected 1126
frames (42.62%), an increase of approximately 2.08 times. In the EM, we determinedthat the battery cannot distinguished to prevent false positives when less than 10% of thetotal frames are detected [2]. We also verified the number of units detected under thiscondition. As a result, the GLM detected 57 units (95.0%), while the EM detected 29
units (48.3%), an increase of approximately 1.96 times.
From these results, the GML was confirmed to be more adaptable to waste batteries thanthe EM. Future research will be conducted to optimize the model so that it can be applied
to other types of batteries.
References
1 Stability. Stable diffusion v1.5 model card, https://huggingface.co/runwayml/stablediffusion-v1-5
Y R. Shihara, H. Ueno, H. Komatsugawa: “Construction and verification of a waste battery classification system using object detection”, AI2023-36.

P1

45

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P2

46

Evaluation of chitosan decomposition by mold
Akihiro Mizuyma1, Tomohisa Suzuki1, Taiyo Nagai1 and Olaf Karthaus1*
1

Graduate School of Science and Engineering, Chitose Institute of Science andTechnology, 758-65 Bibi, Chitose Hokkaido 066-8655, Japan
m2230340@photon.chitose.ac.jp

Biodegradable plastics using chitin and chitosan, which are natural polymers, havebeen produced to reduce the environmental burden that is caused by synthetic polymers.
Chitosan solution is used in the fabrication process, and ,surprisingly, mold growth wasobserved in the solution. However, chitosan is generally considered to be antimicrobial,
and should inherently resistant to mold growth. By studying the degradation of chitosan
by such mold, it is possible to control the degradation of materials derived from chitosan.
In this study, we analyzed molds and evaluated the degradability of chitosan-derived
biodegradable plastics by molds.
Molds cultured in chitosan solution were observed by FE-SEM and Czapek-dox
medium was prepared for identification. To analyze the degradation of chitosan solution,
the viscosity of chitosan solutions during mold growth was measured. In parallel, theBOD was measured. In addition, mold-infected chitosan solutions were dropped onto
biodegradable plastic derived from chitin and chitosan, and their degradation by mold
was observed under a stereomicroscope and FE-SEM.
The mold cultivated in the chitosan solution was found to be Aspergillus (Fig. 1).
Three-week BOD measurements showed that the duration of mold growth and the amountof mold growth varied with the concentration of the chitosan solution (Fig. 2). This isdependent on the concentration of the chitosan solution. Surface degradation was also
observed after about 4 months (Fig. 3). Therefore, it can be said that the fungus is capableof reproducing and degrading in the presence of chitosan.

Fig 2 SEM image of moldFig 1 Result of BOD

Fig 3 Decomposition image by mold

P3

47

Basic research for the preparation of alternative materials
for plastics of Fomes Fomentarius
Ryuya Abe1, Tomohisa Suzuki1, Olaf Karthaus1*
1

Graduate School of Science and Engineering, Chitose Institute of Science andTechnology, Chitose 066-8655, Hokkaido, Japan
kart@photon.chitose.ac.jp

Today, the problem of plastic waste is becoming more and more serious on a global scale.
Although plastic hurts the environment, it is an inseparable part of our daily lives.
Therefore, we would like to make it possible to use plants, which can be a sustainable
resource, as an alternative material to plastics. Here, we
focus on a fungus, Fomes Fomentarius, that is widespreadin Hokkaido. It has a porous base and a cross section ofchannels leading to the bottom. The body is as hard as
hardwood. It is sometimes used as a natural herbal
medicine, but it is not currently used as a cellulose material.
In this study, the dried and powdered Fomes Fomentarius
were used. The powder consisted mainly of cellulose
microfibers with a circular cross-section which could bemixed with water, a cross-linking agent, and chitosan tomake a paste, which was then hot-pressed at 90°C for 30
minutes at 60 MPa using a JIS-K7139 type mold to produce
dumbbell-shaped test pieces. The test pieces were thentensile tested for strength, and stress-strain
curves were collected for several
preparation conditions, and the crosssections were imaged by SEM.

P4

48

Microscopic structure of VUV-irradiated cycloolefin-polymer
substrates by transmission electron microscopy and spectrum imaging
Koichi Higashimine1,*, Shoko Kobayashi1, Taro Arimoto2,3
1

2

JAIST, 1-1, Asahidai, Nomi, Ishikawa, Japan
Ushio Inc., 1194, Sazuchi Bessho-cho, Himeji, Hyogo, Japan
3
Osaka University, 2-1 Yamadaoka, Suita, Osaka, Japankoichi@jaist.ac.jp

Advances in adhesive technology are expected to increase adhesive strength while
maintaining a flat interface between metals and resin substrates. One method to enhanceadhesion strength is by pretreatment of the resin substrate surface with vacuum
ultraviolet (VUV) irradiation (λ = 172 nm) using an excimer lamp [1]. This treatment
leads to the formation of oxygen-related functional groups at the surface, as confirmed
by using infrared absorption spectrometry. However, the microscopic structure of theresin substrate surface including these groups remains unclear. In the present study, we
conducted transmission electron microscopy (TEM) observations and electron energy
loss spectroscopy-spectrum imaging (EELS-SI) measurements on cross-sectional
samples of VUV-irradiated cycloolefin polymer (COP) substrates. We adopted theiodine ion staining method to stain the functional groups for TEM samples. As shown in
Figs. 1 and 2, the results suggest the presence of a modified layer near the COP surface.
It is noted that a relatively high concentration region of oxygen-related functionalgroups exists at a depth of several hundred nanometers, marked as "B" in Fig. 1 andshown with a two-way arrow in Fig. 2(e). Such functional groups' distribution might
affect the formation of metal plating.

Fig. 1 A cross-sectional TEM image
near the surface of VUV-irradiated
COP stained with iodine ion, in which
the dark contrast indicates oxygenrelated functional group distributions.

Fig. 2 Results of EELS-SI measurement
and multivariate analysis of VUVirradiated COP. (a) survey image, (b)distribution map, (c) COP area, (d) epoxy
resin area, (e) integrated line profile of (b).

Acknowledgment
This work was partly supported by the ARIM_JAPAN project under Grant Numbers
JPMXP1222JI0012, JPMXP1223JI0009, and JPMXP1223JI0055.
References[1] T. Arimoto et al. 18th IMPACT Conference, Proceedings 247 - 250 (2023).

P5

49

Examination of a Water Filter Containing Populus alba Leaves
Konoha Ueda1, Shinon Takahashi1, Yoshihiko
Omura , Chiharu Hayashida3 and Hiroshi Kunimori3, Olaf Karthaus1*
1
Department of Applied Chemistry and Bioscience, Chitose Institute of Science andTechnology, 65-758 Bibi, Chitose 066-8655, Japan. 2Omura Toryo Inc., 3-87 Chiyomi,
Tottori 680-0911, Japan. 3Aoya Washi Koubou, Aoyacho Yamane 313, Tottori 6890514, Japan2b2210380@photon.chitose.ac.jp
This study aims to develop a pollutant adsorbent paper filter using leaves of White
poplar (Populus alba), a naturalized tree in Hokkaido, as a solution for water pollution.
White poplar leaves have a dense fiber layer especially at the underside of the leaves thatare both highly hydrophobic and lipophilic.
Previous research has shown that intact leaves can absorb various organic dyes froman aqueous solution[1]. To improve the usability of the material as a filter, the crushed
leaves were incorporated in paper by combining them with Japanese ‘washi’ paper using
various preparation techniques. Figure 1 shows the electron micrograph of a filter paper
produced by mixing Washi fibers made from gampi (Diplomorpha sikokiana) andpopulus alba crushed leaves. The crushed leaves are randomly incorporated into the washi
fiber network, and there was no observable preferred orientation or aggregation.
By using a simple filtration system driven by capillary force and gravity, weinvestigated the adsorption of Rhodamine B on washi with or without P. alba. Compared
to washi made by simply mixing washi raw materials and P. alba, the two-layer structurewith the mixed washi overlaid on top of the washi resulted in a faster filtering rate. Washi
made from D. sikokiana were more compatible with P. alba and easier to make than thosemade from paper mulberry (Broussonetia kazinoki). The filtering speed was also faster.
In conclusion, the possibility that natural cellulose fibers can function as an adsorbent
was demonstrated. In the presentation, detailed conditions for dye adsorption on P. alba
and the adsorption mechanism will also be discussed.

Figure 1. A filter paper (left) and a filtration system (right)
References
1 Shinon Takahashi, Ryota Iida, Tatsuki Saito, Masayoshi Tabata, Thomas Berberich,Olaf Karthaus: “Structure of Cellulose Microfibers on the Lower Side of Populus Alba
Leaves and their Use in Materials”, CIF22, Sept. 30, 2022, Chitose, Japan

P6

50

Surface modification of nanofibrillated bacterial cellulose:
anionization by TEMPO-catalyzed oxidation
Hijiri Takeda, Ryota Kishimoto, Sayaka Fujita, and Hiroyuki Kono*
Division of Applied Chemistry and Biochemistry, National Institute of Technology,
Tomakomai College, Tomakomai, Hokkaido 059-1275, Japanth23819@stu.tomakomai-ct.ac.jp (H.T.)
Nanofibrillated bacterial cellulose (NFBC) is expected as a functional nanofibrous
carrier because of its excellent properties such as high aspect ratio, high mechanicalstrength, biodegradability, and biocompatibility. However, the NFBC surface has onlyhydroxyl groups and no highly reactive functional groups for surface modification or graftpolymerization. Carboxymethylation is one of the popular methods for modifying
cellulose, but the reaction is performed in a mixture of aqueous sodium hydroxide
solution and isopropanol, which is accompanied by fiber swelling1. TEMPO-catalyzed
oxidation, on the other hand, can rapidly convert the primary hydroxyl groups of cellulose
dispersed in water to the carboxyl groups2. In this study, the conversion of primaryhydroxyl groups on the surface of NFBC to carboxyl groups using TEMPO-catalyzed
oxidation was investigated for the purpose of functionalizing NFBC (Figure 1). Whenlaccase was used as cofactor in the oxidation reaction of NFBC, the primary hydroxyl
groups on the NFBC surface were efficiently converted to the carboxyl groups. The
aqueous solution of the TEMPO-oxidized NFBC (TONFBC) improved its permeability
and its zeta potential negatively shifted. TONFBC is expected to be applied to thickeners
and binders, and to form polyelectrolyte complexes with polycations such as chitosan,
which has potential applications as antimicrobial nanofibers in medical materials andfood packaging materials.
OH
O

O
HO

OH

COONa

OH

HO
O

O
HO

NFBC

TEMPO
oxidation

O

O

HO
O

HO
OH

OH

OH
O

COONa

Polyelectrolytecomplexation

TONFBC

9 Thickener
9 Binder

O

OH

O

O

O

HO
NH2

HO
NH2

Ch/NFBC

9 Medical materials
9 Packing materials

Figure 1. Preparation of TEMPO-oxidized NFBC (TONFBC) and its polyelectrolytecomplexation with chitosan
Acknowledgments
This study was partially supported by the JSPS KAKENHI Grant Number JP24K08548,
JST SATREPS Program Grant Number JPMJSA2206, and F-REI Grant Number
JPFR23020106.
References
1. H. Kono et al., ACS Omega, 6 (2021) 34107-34114.
2. J. Jiang et al., Biomacromolecules 18 (2017) 288-294.

P7

51

Biodegradable resin composites reinforced with the nanofibrillated
bacterial cellulose
Airi Yokokawa, Kennosuke Takaya, and Hiroyuki Kono*
1

National Institute of Technology, Tomakomai College, Tomakomai, Hokkaido 0591275, Japanya23833@stu.tomakomai-ct.ac.jp (Y.A.)

Biodegradable resins such as polycaprolactone (PCL) and polybutylene succinate (PBS)
are promising alternatives to petroleum-based plastics. However, the application of these
biodegradable polyester resins is limited because of their low mechanical properties.
Therefore, this study investigated the improvement of mechanical property of PCL and
PBS by compositing nanofibrillated bacterial cellulose (NFBC). NFBC has excellent
properties such as homogenous fiber width and a long fiber length. Due to its threedimensional network structure, NFBC shows high mechanical strength and Young's
modulus, and thus it is expected as a nanofiller for fiber-reinforced composite resins1).
Herein, surface-modified NFBCs were prepared from neat NFBC dispersed in aqueous
solution by silane-coupling reaction with 3-aminopropyltrimethoxysilane to enhanceinterfacial adhesion between NFBC and resins2). The surface-modified NFBC (APC) was
well dispersed in these resins by melt kneading method, and the elasticity and Young's
modulus of the composites were enhanced with increasing APC content (Figure 1). Fromthese results, it is concluded that the surface-modified NFBC is effective for enhancing
the mechanical properties of the biodegradable resins.
APC wt%40

stress㸭MPa

1.4 times

APC wt%530
stress㸭MPa

1.5 times

20

0.5
0

10

1.5 times

0.5

1.5 times

0

20

10

0

0

0

5

10
15
strain㸭%

20

25

0





5

10
strain㸭%

15

Figure 1. Stress-strain curves of APC-reinforced PCL (left) and PBS (right) composites.
Acknowledgments
This study was partially supported by the JSPS KAKENHI Grant Number JP24K08548,
JST SATREPS Program Grant Number JPMJSA2206, and F-REI Grant Number
JPFR23020106.
References
1. H. Kono et al., ACS Omega, 5, 29561-29569 (2020).
2. H. Kono et al., Nanomaterials, 12, 537 (2022).

P8

52

Formation of novel crystalline chitin nanoribbons by self-assembly ofchitin oligohexamer in aqueous solution
Ayumu Izutsu1, Yuya Nagaoka1, Takeshi Hattori2, Taiiti Usui3, Takuya Isono4, Makoto
Ogata2, Hiroyuki Kono1,*
1

Division of Applied Chemistry and Biochemistry, National Institute of Technology,
Tomakomai College, Nishiki-oka 443, Tomakomai, Hokkaido 059-1275, Japan
2
Faculty of Food and Agricultural Sciences, Fukushima University, 1 Kanayagawa,
Fukushima, Fukushima 960-1296, Japan
3
Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 4228529, Japan
4
Faculty of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo 060-8628,
Japan
ia23803@stu.tomakomai-ct.ac.jp (I.A.)
Proteins and nucleic acids form regular structures in aqueous solution through selfassembly processes. Chitin also forms regular hierarchical structures via hydrogenbonding of molecular chains, but its self-assembly process is still unknown1, 2. In thisstudy, we found that among water-soluble chitin oligosaccharides, only chitin hexamer(GN6) shows a reversible sol-gel transition at high temperature (Figure 1, left). The
transition temperature (Tg) shifted to the lower temperature side with increasing GN6
concentration, especially the Tg of aqueous GN6 solution with 2.0–2.5 wt% concentration
was almost same as the biological temperature. The formed gel consisted of plate-like
nanoribbon aggregates about 200 nm wide and 3 nm thick and water, and the nanoribbons
had a highly crystallized α-chitin structure. The direction of fiber growth of the generated
nanoribbons was orthogonal to the c-axis (fiber axis) of the α-chitin crystal, indicatingthat the nanoribbons grew along the b-axis of the α-chitin crystal; the GN6 molecules
were aligned perpendicular to the nanoribbon growth direction and the adjacent GN6
molecules were aligned inversely parallel. The GN6 nanoribbon growth direction
corresponds to a hydrophobic surface and is considered to be self-assembled byhydrophobic interactions. These results indicate that the plate-like nanoribbons formedby the self-assembly of GN6 molecules can be used as pure α-chitin crystals, and the

Figure 1. Water solubility of chitin oligomers (GNn) at 4ǀC and 90ǀC (left). GN6 shows
the reversible phase change from solution to gel upon heating. Biomedical application of
GN6 gels (right).

53

nanoribbon formation mechanism is very useful information for understanding themechanism of hierarchical structure formation from the assembly of chitin molecules.
Furthermore, the thermoreversible gelation exhibited by GN6 aqueous solution is
expected to be applied to biomaterials such as thermoresponsive injectable gels thatcombine chitin-derived biocompatibility and cell adhesion (Figre 1, right).
Acknowledgments
This study was partially supported by the JSPS KAKENHI Grant Number JP24K08548,
JST SATREPS Program Grant Number JPMJSA2206, and F-REI Grant Number
JPFR23020106.
References
1. Barikani, M. et al., Iran. Polym. J. Eng. Ed. 23, 307–326 (2014).
2. Serizawa, T. et al., ACS Macro Lett. 9, 301–305 (2020).

P954
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+1* #./  '++" 

P10

55

Effect of Biomorphic Design Elements of Virtual Environment
on Virtual Walking
Misuzu Hasegawa1, Mana Nakai1, and Daiji Kobayashi2
1

Graduate school of Chitose Institute of Science and Technology, Hokkaido,
066-8655, Japan
2

Chitose Institute of Science and Technology, Hokkaido, 066-8655, Japan
m2240360@photon.chitose.ac.jp

In recent years, virtual reality (VR)-based services for art museum visits and shopping
experiences have become increasingly prevalent. These services are distinguished by theirability to allow users to experience a virtual environment as if they are walking throughit. Generally, VR controllers are used to navigate these environments. However, users
often lack recognition of spatial information because they perceive movement only
visually. As a result, users may have difficulty remembering the virtual space and are
more likely to get lost. To address this issue, users need to pay more visual attention to
virtual spaces. We focus on biomorphic design to enhance visual attention in virtual
spaces. This design is characterized by curvilinear and fluid forms that imitate naturalelements such as creatures and water. Mirkia et al. (2022) found that visual attention wasenhanced in spaces with biomorphic design, leading to improved spatial memorability [1].
Therefore, this study aimed to investigate the impact of biomorphic design elements onnavigation within a virtual space. For this investigation, we asked subjects to navigate
five mazes with progressively varying amounts of biomorphic design and recorded
differences in the time to complete the mazes. Additionally, we gathered participants'
opinions. These results suggest that biomorphic design elements in virtual spaces affectnavigation, but the impact varies depending on the amount of biomorphic design, which
requires further examination.
References
1 H. Mirkia, M.S.C. Nelson, H.C. Abercrombie, K. Thorleifsdottir, A. Sangari, A. Assadi,
Recognition Memory for Interior Spaces with Biomorphic or Non-Biomorphic Interior
Architectural Elements. Journal of Interior Design. 47(3), 47-66 (2022).

P11

56

Impact of External Human-Machine Interface on Pedestrian
Situation Awareness in Autonomous Delivery Vehicle Scenarios
Yuga Kato1 and Daiji Kobayashi2
1

Graduate School of Chitose Institute of Science and Technology, Hokkaido
066-8655, Japan
2
Chitose Institute of Science and Technology, Hokkaido 066-8655, Japan
m2240180@photon.chitose.ac.jp
The shortage of drivers in the transportation industry has led to the integration ofautonomous driving technology to supplement this workforce. Autonomous delivery
vehicles (ADVs) are predicted to assume the role of last-mile transportation. However,
the absence of a driver in autonomous vehicles limits communication with other road
users, resulting in reduced situation awareness. According to Endsley, situation
awareness involves the perception of elements in the environment, comprehension of
their meaning, and projection of their status in the near future. To enhance the situation
awareness of other road users, an external human-machine interface (eHMI) has beenstudied and developed to improve communication with other road users. This study
focused on pedestrians and investigated the impact of eHMI on their situation awarenesswhen interacting with ADVs. The experiment involved two conditions: with eHMI andwithout eHMI. Fourteen participants interacted with ADVs as pedestrians under bothconditions in a virtual environment. The situation awareness of the participants wasmeasured using the Situation Awareness Rating Technique (SART) and the Situation
Awareness Global Assessment Technique (SAGAT). The results showed that in the
SART, understanding of the situation and overall scores were significantly higher witheHMI compared to without eHMI. In the SAGAT, confidence in situation awareness was
significantly higher with eHMI compared to without eHMI. Additionally, participants
expressed that "the eHMI made it feel like they could communicate with the ADVs" and"the eHMI showed that the ADVs were aware of their surroundings." Therefore, eHMI
improved the situation awareness of pedestrians, and it is assumed that eHMI could
resolve communication issues in ADVs as well.
References
1 A. M. Schuster, S. Agrawal, N. Britt, et al, Technology in Society,G Will automatedvehicles solve the truck driver shortages? Perspectives from the trucking industry.
74(3), 102313 (2023).
2 S. Dabic-Miletic, J. Ind Intell, Autonomous Vehicles as an Essential Component ofIndustry 4.0 for Meeting Last-Mile Logistics Requirements, 1(1), 55̼62 (2023).
3 M. R. Endley, Proceedings of the Human Factors and Ergonomics Society Annual
Meeting, Design and Evaluation for Situation Awareness Enhancement, 32(2), 97̼
101 (1988).

P12

57

Virtual Training Workspaces for Assembly Workers: A Case Study on
Office Chair Assembly
Naomi Kuwata1, Ryusei Fukuda1 and Daiji Kobayashi2
1

Graduate School of Chitose Institute of Science and Technology,
Chitose, 066-8655 Japan
2
Chitose Institute of Science and Technology, Chitose, 066-8655 Japan
m2240200@photon.chitose.ac.jp
Automobile manufacturers have pioneered the development and implementation ofvirtual training workspaces for assembly workers1. Utilizing information technology fortraining, especially through immersive environments such as virtual reality (VR), has
proven to be effective in improving training outcomes. Songjia et al. (2021) examined theimpact of varying levels of immersion on training effectiveness by providing assembly
instructions via video, mobile VR, and VR2. Their findings revealed that instructionsdelivered through mobile VR and VR significantly reduced training time, validating theefficacy of VR-based training. However, it is crucial to verify that the trainee's
performance in a virtual environment translates effectively to the real workplace.
This study aims to experimentally clarify the potential and challenges of designing andsetting up a virtual workspace for assembling an office chair using motion analysis.
Specifically, we focused on evaluating how different virtual workspace layouts affectwork efficiency.
Participants were trained on how to navigate the virtual environment and assemble anoffice chair through a video tutorial. After practicing the assembly task, they performed
the experimental assembly task five times. In the initial setup, termed Workspace A,
participants' movements were tracked and analyzed to identify inefficiencies. Analysis ofWorkspace A revealed that excessive movement was a significant factor in reducing work
efficiency. The redesigned Workspace B, which minimized unnecessary movements,
resulted in significantly shorter assembly times. Additionally, participants reported
significantly lower discomfort levels in Workspace B, as measured by the Subjective
Fatigue Scale (SFF). These results demonstrate that optimizing the layout of a virtual
workspace can enhance work efficiency and reduce trainee fatigue. The results
demonstrate the effectiveness of analyzing hand movements to enhance the design ofvirtual training workspaces. By reducing unnecessary movements and optimizing thelayout, trainees were able to complete tasks more efficiently with less fatigue.G
References
1 “Audi uses modular solution for virtual-reality training”, Audi MediaCenter,(https://www.audi-mediacenter.com/en/press-releases/audi-uses-modular-solutionfor-virtual-reality-training-10767).
2 S. Sonjira, C. Hsiang-Ting, R. William, and L. W. Tuck, Effects of Level of Im
mersion on Virtual Training Transfer of Bimanual Assembly Tasks, Virtual Re
ality and Human Behaviour, 2, (2021)

P13

58

Comprehensive analysis of metabolic pathways involving
MBW-transcriptional complex in Marchantia polymorpha
Akari Harada1, Haruka Arai2, Kazuya Yanagiura2 and Kengo Morohashi1
1Graduate School of Science and Technology, Chitose Institute of Science andTechnology, 758-65 Bibi, Chitose, Hokkaido, 066-8655, Japan2
Department of Applied Biological Science, Faculty of Science and Technology, Tokyo
University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
k-moroha@photon.chitose.ac.jp
A genotype reflects a phenotype through the regulation of gene expression by a set oftranscription factors known as gene expression networks (GRNs). Since GRN is a processof gene regulation, it is invisible, whereas the phenotype is clearly visible. Thus,
elucidating the role of GRNs from an evolutionary perspective is challenging. In
Marchantia polymorpha, which belongs to the basal part of terrestrial plant evolution,transcription factors MpMYB02 and MpMYB14 have been reported to contribute tosecondary metabolism (1) as components of the MYB-bHLH-WD (MBW) complex,
which is widely conserved in plants. We previously reported that MpBHLH12 participatesin organ development and metabolic pathways (2). Although MpMYB02 and MpMYB14
are thought to interact with MpBHLH12 in the MBW complex, it is unclear how theMBW complex regulates secondary metabolic pathways through GRNs. Therefore, we
focused on the GRN of metabolic pathways involving MBWs. We generated various
recombinant M. polymorpha, in which the expression of MpMYB14 or MpBHLH12 wasmodified. Comprehensive analyses of the metabolic profiles and gene expression in theserecombinants revealed that MpBHLH12 is involved in isoquinoline alkaloid production.
Currently, we are conducting a detailed analysis of genes involved in these biosynthetic
pathways.

References
1. H. Kubo, S. Nozawa, T. Hiwatashi, Y. Kondou, K. Saito, K. Takanashi, T. Kohchi, K.
2.

Ishizaki, J. Plant Res. 131, 849-864 (2018).
H. Arai, K. Yanagiura, Y. Toyama, K. Morohashi, J. Plant Res. 132, 197-209 (2019).

P14

59

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P15

60

Towards the development of odor biosensors: Evaluation of gene
expression responses in Escherichia coli to a volatile organic compoundby a novel aeration-culture based system
Riki Inui1, Taiga Kamio2, Kengo Morohashi1,21Graduate School of Science and Technology, Chitose Institute of Science andTechnology, 758-65 Bibi, Chitose, Hokkaido, 066-8655, Japan2
Department of Applied Biological Science, Faculty of Science and Technology,
Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
k-moroha@photon.chitose.ac.jp
In recent years, the quantification of the human senses such as sight, hearing, taste, touch,and smell has progressed with the development of various sensors, but the quantificationof the sense of smell has been delayed owing to the complexity of the many types ofvolatile organic compounds (VOCs) that are the source of odors. Given the complex
nature of smell, this study focused on leveraging microorganisms, known for their
sensitive VOCs detection capabilities, to advance biosensor technology (1,2). Therefore,
we aimed to develop a biosensor using microorganisms by utilizing the mechanisms ofgene expression changes. Previously, we isolated sequences from Escherichia coli(E.
coli) that responded to the VOC, 2-phenylethanol (2-PE), in solid medium. However, theresponse to 2-PE in a solid medium is insufficient to develop a VOCs sensor that detects
volatiles in air. Therefore, we developed an aeration culture system that continuously
exposes E. coli to VOCs (Fig. 1). Using this system, we assessed a previously identified
recombinant E. coli clone, PERS52, which can survive in cultures containing antibiotics
only under 2-PE, since the 2-PE responsive sequence is located on the promoter of theantibiotic resistance gene. We confirmed that the number of viable PERS52 cells wasincreased in the presence of 2-PE (Fig. 2). Thus, we concluded the development of an
aeration culture system to detect VOCs. Next, we utilize this system to screen novel
sequences that respond to various VOCs.

Figure 1. Aeration culture system  Figure 2. PERS52 aeration results

References
1 Sharma, U.K., and Chatterji, D. FEMS Microbiol. Rev. 34, 646–657 (2010).
2 Wang, D., Ding, X., and Rather, P.N. J. Bacteriol. 183, 4210–4216 (2001).

P16

61

Attempts to identify target proteins of polyphenols
Ami Yakushijin1, Kengo Morohashi1
1Graduate School of Science and Technology, Chitose Institute of Science and Technology, 758-65 Bibi, Chitose, Hokkaido, 066-8655, Japan
k-moroha@photon.chitose.ac.jp

Leukemia is one of the most common forms of cancer in young people. The main
treatment for leukemia is chemotherapy with anticancer drugs, although these drugs havesignificant side effects, especially in the young generation. In recent years, polyphenols,
which have anticancer effects, have been attracting attention; however, treatment with asingle polyphenol has limited effects and does not meet practical requirements. Unlike
drugs, which act strongly on a few target proteins, polyphenols are known to act
moderately on many proteins; the effects of polyphenols are relatively mild compared tothose of drugs. Thus, we sought to address the limited action of polyphenols by combining
multiple polyphenols in a focused biological pathway. Therefore, we attempted to
identify direct target proteins of certain polyphenols that exhibit strong synergistic effects.
We generated a cDNA library from leukemia cells and screened for proteins that weredirectly associated with a given polyphenol. In this study, we report a vector-incorporated
random cDNA (Figure 1).

Figure 1. Schematic diagram of the vectors created for this project
G
G

P17

62

An Integrated Network Analysis to Exploring the Potential of
Flavonoid Combinations in Food for Drug-like Effects
Koyo Fujisaki1, Osei Horikoshi2, Yukitoshi Nagahara2, and Kengo Morohashi1*
1

Faculty of Science and Technology, Department of Applied Chemistry andBioscience, Chitose Institute of Science and Technology, Chitose, Hokkaido, Japan
2
Division of Life Science, School of Science and Engineering, Tokyo Denki
University, Ishizaka, Hatoyama, Hiki-gun, Saitama 350-0394, Japan
k-moroha@photon.chitose.ac.jp
Flavonoids, a class of polyphenols found in vegetables and fruits, have been associatedwith various health benefits, including improved endothelial function, reduced risk ofheart disease, and anticancer effects. However, the mechanisms through which flavonoids
exert their effects differ from those of drugs approved by the Food and Drug
Administration (FDA). While drugs interact with a small number of proteins with highaffinity, flavonoids tend to interact with a broad range of proteins with moderate affinities,
resulting in their nontoxic nature when consumed in the diet. Recent studies have
employed network pharmacology to investigate the relationships among drugs, proteins,and biological functions, suggesting that flavonoid combinations can be explored byexamining their interactions with biological networks. In this study, we comprehensively
predicted the effects of flavonoids by analyzing drug-flavonoid associations using an
integrated protein-compound network (Figure 1). To better understand the consequencesof flavonoid combinations in food, we investigated the relationship between drug andflavonoid interactions and the flavonoid content in food. Previous epidemiological studies
have shown that this relationship is correlated with the degree of association between
drugs and flavonoids as well as the flavonoid content of the food in question. Our findings
provide insights into the potential of foods containing optimal flavonoid combinations to
produce drug-like effects, thereby opening new avenues for the development offlavonoid-based therapies and functional foods.
Figure 1. A heat map showing therelationship between flavonoids and drugclassification (the ATC classification level 1).
The vertical axis represents flavonoids, andthe horizontal axis represents the ATCclassification level 1. The ATC classificationlevel 1 is as follows: A: Alimentary tract andmetabolism, B: Blood and blood forming
organs, C: Cardiovascular system, D:
Dermatologicals, G: Genito urinary systemand sex hormones, H: Systemic hormonal
preparations, excl. sex hormones andinsulins, J: Antiinfectives for systemic use,
L: Antineoplastic and immunomodulating agents, M: Musculo-skeletal system, N: Nervous
system, P: Antiparasitic products, insecticides and repellents, R: Respiratory system, S: Sensory
organs, V: Various.

P18

63

Output light emitted from POF cutting-faces finishedby different facet terminations
Akaru OKAZAKI 1, Kotaro TAKAHASHI1, Kimio OGUCHI2,
and Masashi EGUCHI1*
1

Department of Opto-Electronic System Engineering, Chitose Institute of Science and Technology
758–65 Bibi, Chitose-shi, 066–8655 Japan
2
Heterogeneously-integrated Silicon Photonic Integration (HiSiPIC), National Taiwan
University of Science and Technology, No.43, Sec.4, Keelung Rd., Taipei, 106335,
Taiwan*megu@paical.spub.chitose.ac.jp

In order to verify which technique is appropriate for cutting and facet finishing of
POF, we have compared various facet finishing techniques. In this study, commerciallyavailable SI-POFs (Super ESKA SK-40 by Mitsubishi Chemical Corporation) were used.
The fiber length was 3 meters and different fibers were used for each experiment toprevent the fibers from becoming too short due to polishing or cutting. The incident end
face was cut with a box cutter, then manually polished with sandpapers (#800 to #10,000),
and fixed thereafter. Measurements were taken by changing only the conditions of theoutput end face.
For comparison based on the particle size of sandpaper, five types of sandpapers (#800,#1000, #1500, #2500, #3000) were tested. In polishing with each sandpaper, pre-polishing
was done in the order from #800, e.g., for measuring with #1500, in the order of #800,#1000, and #1500. In addition, manually polishing with a polishing tool for glass opticalfibers was also attempted. Next, a method using a hot plate for end face finishing wasmeasured at temperatures from 70 to 120Ȕ.
Fig.1 shows a measurement setup. Here, a laser diode module operating at 635nm wasused. As an example, end faces manually polished by sandpapers are shown in Fig.2.
Figs.2(a) and 2(b) correspond to polishings with #800 and #3000, respectively. It can beseen that in using a coarse sandpaper polishing flaws remain on the end face, wheareas inusing a fine sandpaper the end face is polished smoothly. As a result, it is consideredappropriate to finish the end face of POF by cutting with a box cutter, then polishing witha tool using a sandpaper around #3000.

Fig.1 Measurement setup.

(a) #800(b) #3000
Fig.2 POF end faces polished with sandpapers.

P19

64

Developing a GUI for experimental design with Bayesian optimizationand case study
Yoshiki Hasukawa, Mikael Kuwahara, Lauren Takahashi, and Keisuke Takahashi
Department of Chemistry, Hokkaido University, North 10, West 8, Sapporo 0608510, Japan
hasukawa.yoshiki.i7@elms.hokudai.ac.jp
Catalyst informatics utilizes data science techniques, such as preprocessing,visualization, and machine learning, to analyze large datasets and identify hidden trends,
patterns, and periodicities from features like reaction conditions, structures, andexperimental variables. This approach treats catalytic reactions as an inverse problem forcatalyst design. Although catalysts remain unchanged before and after a reaction, they
undergo dynamic changes during the process, making it challenging to elucidate reaction
mechanisms. However, even when the reaction mechanism is not fully understood,machine learning can reveal data-driven trends and patterns, making informatics
particularly useful in the context of catalytic reactions. Especially, bayesian optimization,
coupled with Gaussian process regression and acquisition functions, has proven to be a
powerful tool in the field of experimental design. Despite its potential, the use of catalyst
informatics poses significant challenges for researchers, as it requires a combination ofdata science skills such as statistics, mathematics, and machine learning and a broad
knowledge of chemistry related to catalysis. To address these challenges and improve thecatalyst development environment, this study developed a graphical user interface forexperimental design using machine learning within the Catalyst Development Platform(CADS)[1], a user-friendly environment for handling data science tasks. The utility of theexperimental design method is demonstrated by applying it to methanol synthesis datausing zeolite catalysts. [2]Figure 1. GUI for experimental design with Bayesian optimization
References
1 Fujima, J., Tanaka, Y., Miyazato, I., Takahashi, L., & Takahashi, K. (2020). Re
action Chemistry & Engineering, 5(5), 903-911.G
Y Hasukawa, Y., Kuwahara, M., Takahashi, L., & Takahashi, K. (2024). Science and Tec
hnology of Advanced Materials: Methods, 4(1), 2300252.

P20

65

Designing Catalyst Descriptors for the Water-Gas Shift andthe Oxidative Coupling of Methane Reactions
Fernando Garcia-Escobar1 and Keisuke Takahashi1
1Department of Chemistry, Hokkaido University, North 10, West 8, Sapporo 0608510, Japanescobarfernando.garcia.u8@elms.hokudai.ac.jp

The incorporation of Machine Learning-assisted methodologies has provensuccessful in the development of efficient catalysts for various applications, as thecandidate screening can speed up the testing and discovery of candidate materials. This
research presents two approaches toward Descriptor design in the construction ofregression models that predict catalyst performance for the Water-Gas Shift (WGS) [1]and Oxidative Coupling of Methane (OCM) [2] reactions.
For the WGS reaction, CO conversion is predicted as a function of catalystmaterial and reaction conditions using a previously reported literature dataset. The
representation of the catalyst materials in the model was explored in two ways: throughone-hot encoding of the components in a Random Forest Regression model, and throughphysical and chemical properties of the metallic element components of the catalysts’ ina Support-Vector Regression model.
On the other hand, for the OCM reaction, C2 yield is predicted as a function of
catalyst composition only across fixed experimental conditions. Here, a featureengineered data set containing 3289 descriptor variables and the performance of 200
catalysts for the oxidative coupling of methane (OCM) is used to develop a descriptor
search algorithm based on the workflow of the Basin-hopping optimization methodology
to sample descriptors that better fit a predictive model.G
In conclusion, we propose an approach toward descriptor design and search thathas been applied to predict catalyst performance for the WGS and OCM reactions. For
the WGS reaction, high CO conversion candidates are predicted to be are promoted
Au/CeO2–ZrO2, Au/CeO2, Ru/CeO2, and Rh/CeO2 candidates, with Yb/Au/CeO2–ZrO2
to be of interest for WGS applications at low temperatures. For the OCM reaction, models
with average cross-validation r2 scores of 0.8268 and 0.6875 for Linear and SupportVector Regression models, respectively could be constructed, which are higher than thoseobtained with common wrapper descriptor selection methodologies.
References
1 F. Garcia-Escobar, S. Nishimura, K. Takahashi, J. Phys. Chem. C. Defg. 127, 61526166 (2023).
Y F. Garcia-Escobar, T. Taniike, K. Takahashi. J. Chem. Inf. Model. 64, 1512-1521 (2024).
G
G

P21

66

Effect of the chemical bonding state on the porous carbon surface on
the persulfate activation and decomposition of organic dyes
Ryusuke Urushidate1, Shuhei Shimoda2, Keita Suzuki3, Atsushi Fukuoka2,
Ken-ichi Shimizu2, Tomoya Takada1
1
Chitose Institute of Science and Technology, Chitose, Japan.
2
Institute for Catalysis, Hokkaido University, Sapporo, Japan.
3
Laboratory of XPS Analysis, Faculty of Engineering, Hokkaido University, Sapporo,
Japan.
M2230060@photon.chitose.ac.jp
Advanced oxidation processes using persulfate (PS) and carbon catalysts have been
widely studied in recent years.1-2 One of the reasons why the decomposition efficiency
differs depending on the type of carbon material is the difference in the chemical state of
the surface. First, we prepared porous carbons with different surface chemical states andinvestigated their chemical structures by XPS and Boehm titration. Next, we investigatedthe efficiency of decomposing organic dyes using each catalyst and identified the best
chemical structure for the surface.
The details of the chemical structure will be announced on the day. In brief, most of the
carboxyl and lactone groups were eliminated by heat treatment, whereas the carboxylgroups were increased by ozone treatment. The decomposition efficiency of organic dyes
was promoted by heat treatment and suppressed by ozone treatment. The longer theprocessing time, the more pronounced is the above tendency. Therefore, PS can be
efficiently activated by removing excess acidic functional groups from the surface.

Fig. 1 Difference in the efficiency of PS activation.

This study was supported by the Joint Usage/Research Center for Catalysis and“Advanced Research Infrastructure for Materials and Nanotechnology in Japan (ARIM),”
the Ministry of Education, Culture, Sports, Science, and Technology (MEXT).
References
1. X. Cheng, H. Guo, Y. Zhang, X. Wu, Y. Liu, Water Res. 2017, 113, 80-88
2. X. Duan, H. Sun, J. Kang, Y. Wang, S. Indrawirawan, S. Wang, ACS Catal. 2015,
5, 4629-4636

P22

67

Antimicrobial Substances Produced by Broccoli
Infected with Soft Rot
S. Doigawa, K. Okoshi*
Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology,
Chitose 066-8655, Japan
It is known that many plants in nature produce defense substances to cope with external stresses
such as feeding damage from insects, ultraviolet rays from sunlight, and pathogens. The types ofthese defense substances vary depending on the type of plant and the source of stress, and todate, numerous attempts have been made to identify the defense substances. However, theantimicrobial substances in broccoli have not yet been elucidated.
Following standard protocols for food analysis [1-5], five fresh broccoli plants were sampled
regularly for 6 days, and the same procedure was used to sample broccoli with soft rot. These
were minced with a knife, grinded in a mortar, extracted with a 1:1 water/methanol solvent, and
LC-MS measurements of the extracts were performed. These analyses were performed using
Agilent MassHunter software and a data analysis software called MS-DIAL developed by
RIKEN. Principal component analysis allowed clustering of each sample, with a cumulative
contribution of 58% (Figure 1). Using the results of the factor loadings analysis, we narrowed
down the components that were characteristic of broccoli with soft rot to three (Figure 2) andperformed LC/MS/MS measurements for each. Component identification using the metabolite
database resulted in the identification of two components. For the remaining one component, wepredicted the compound from the obtained fragment pattern and synthesized a candidate
compound.

Fig.1 – Results of principal component analysis
of aging process and soft rot

Fig.2 – Results of factor loadings analysis
of aging process and soft rot.

References[1] A. Trredoux, A. de Villiers, P. Májek, F. Lynen, J. Agric. Food Chem. 56 (2008) 4286
[2] M. P. Martí, O. Busto, J. Guasch, J. Chromatogr. A 1057 (2004) 211[3] G. Botelho, A. Mendes-Faia, M. C. Climaco, J. Agric. Food Chem. 56 (2008) 7393
[4] Y. Fang, M. C. Qian, J. Agric. Food Chem. 54 (2006) 8567
[5] V. Arbona, D. J. Iglesias, J. Agric. Food Chem. 57 (2009) 7338

P23

68

Nanopatterning Using the Smectic Phase of Rod-Like Polymers
as a Template
Johanna Beck, Yoshitaka Sugiyama, and Kento Okoshi*
Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology,
Chitose 066-8655, Japank-okoshi@photon.chitose.ac.jp
It is theoretically predicted that when spherical particles are mixed with rod-like particles
that form the smectic phase, an entropic interaction called the depletion effect selectively
segregates the spherical particles between the layers of the smectic phase, stabilizing thephase.1 We have demonstrated that spherical molecules are selectively stored in theinterlayer when a rod-like polymer (polysilane) with a narrow molecular weight
distribution that forms the smectic phase is mixed with a small compound(tetraalkylsilane) that can be regarded as spherical.2 By using the stripe-like phaseseparation structure with 10-100 nm intervals formed by this mixture system as a template,
nanopatterning of the underlying substrate can be expected. By using the stripe-like
phase-separation structure with 10-100 nm intervals formed by this mixture system as atemplate, it is expected to perform nano-patterning of the substrate.
We washed and dried silicon wafers (10x10 mm), spin-coated a chloroform solution (1.5mg/mL) of a mixed sample of polysilane (Mw=125,600, Mw/Mn=1.17) andtetradecylsilane (20wt%) onto the and subjected to thermal annealing at 100°C for 20h.
The substrate was subjected to CF4 (methane tetrafluoride) plasma etching for 1 min, andthen chloroform:20 min ultrasonic cleaning was performed to remove polysilane,
followed by reduced-pressure drying. AFM and SEM observations (Figure. 1) showedthat the stripe structure was transferred onto the substrate in a layer-like segregatedmanner.

Figure 1. AFM cross-sectional profile (left) and SEM image (right).
References
1 T. Koda, M. Numajiri, S. Ikeda, J. Phy. Soc. Jpn., 65, 3551 (1996).
2 T. Tanaka, I. Kato, K. Okoshi, J. Research Updates Polym. Sci., 7, 1 (2018).

P24

69

Structural Study on Rod-Coil-Coil Block Copolymers
with polyacetylene as the hard segment
T. Onishi, K. Okoshi
Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology,
Chitose 066-8655, Japan
Although it is still not possible to predict the behaviour of a liquid crystal from its chemical
structure, computational studies on liquid crystalline (LC) phases formed by coarse-grained rodlike particles have shown that the most commonly observed nematic-smectic-columnar LC phasesequence can be reproduced in simple rod-like particle systems.1-3 Such theoretical treatment may
reveal the essence of liquid crystal formation other than the intermolecular interaction specific to
the molecular structure. This theoretical approach has been extended to systems of end-tethered
rod-like particles to show rich phase behaviours, including wavy lamellae, zig-zag lamellae,
perforated lamellae, smectic C, and bilayer arrowhead structures, which could occur dependingon the relative coil fraction and the aspect ratio of the rods.
Some of these theoretically predicted structures have been prepared experimentally with rod-coilor coil-rod-coil block copolymers by balancing the mutual repulsion between immiscible blocks
and the local packing of blocks of different shapes. However, there has been no systematicquantitative verification of the theoretical predictions by synthesizing block copolymers with
precisely controlled molecular weights and molecular weight distributions, although such
synthesis is essential for refining the theoretical models.
Polyacetylenes, whose main chain backbone is polyene composed of sp2 carbons, are known as
one of the representative helical polymers, and a living polymerization method forphenylacetylenes using a multi-component catalyst system consisting of a rhodium complex,
aromatic boronic acid derivatives, and diphenylacetylene derivatives has been reported.4
In this study, we report the synthesis of a macroinitiator bearing an atom transfer radical
polymerization (ATRP) initiator at the end of a rigid rod-like helical polyacetylene with a very
narrow molecular weight distribution and the ATRP of styrene monomer to extend the flexible
coil from the ends (Figure 1) (Figure 2). Such a block copolymer could be used to quantitatively
verify the theoretical predictions.

Figure 1. Synthesis scheme.

Figure 2 SEC of block copolymer.

References1 A. Stroobants, H. N. W. Lekkerkerker, D. Frenkel, Phys. Rev. A: At., Mol., Opt. Phys. 36(1987) 2929
2. J. A. C. Veerman, D. Frenkel, Phys. Rev. A: At., Mol., Opt. Phys. 43 (1991) 4334
3. P. Bolhuis, D. Frenkel, J. Chem. Phys. 106 (1997) 666
4. K. Maeda et al., Angew. Chem Int. Ed., 59, 8670 (2020).

P25

70

Heterogeneous Structure in PMMA Synthesized by Bulk
Polymerization
N. Suehiro, K. Okoshi
Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology,
Chitose 066-8655, Japan
Flexible and easy-to-handle plastic optical fibers are required to meet the demands of today's
high-speed, high-capacity information communication networks. Therefore, amorphous
polymers that do not have a non-uniform structure of refractive index in the crystalline region
have been actively studied. TANIO Laboratory has been developing extremely transparent
PMMA (polymethyl methacrylate) to minimize the transmission loss of plastic optical fibers.
However, when PMMA polymerized under various conditions was evaluated by light scattering,
it was found that a refractive index inhomogeneous structure on the order of tens of nm existed,which prevented high transparency [1].We have been analyzing the refractive index
inhomogeneous structure of PMMA in collaboration with TANIO Laboratory, and comparing
the transparency of PMMA samples at different polymerization temperatures and times, wehave found that the refractive index inhomogeneous structure grows with polymerization time
when polymerization is performed below 110°C, which is the glass transition temperature. In
addition, AFM observation confirmed a spherical structure, which is considered to be correlatedwith the inhomogeneous structure.
In this study, we report the change in the size of spherical structures by AFM observation.
Observation of samples with polymerization temperature and polymerization time increased to
70°C and 70°C, respectively, showed that the spherical structure tended to increase in size withthe passage of time (Figure 1). AFM observation of samples with a polymerization time of 96
hours and varying polymerization temperatures showed that the spherical structure became
larger as the temperature approached 110°C, the glass transition temperature (Figure 2).

Fig1. AFM elastic
l i modulus
d l mapping
i off PMMA tp 96
96,480,600,720
480 600 720 h

Fig2. AFM elastic modulus mapping of PMMA Tp 70
Fig2
70,90,100,130
90 100 130 ℃

References[1] N. Tanio, H. Obata, A. Okada, S. Segawa, R. Takemura, R. Kaneko Kobunshi Ronbunshu.
66, 1-9 (2009).

P26

71

)ormation of 8nique 6tructure (xpressed in &oil-5od-&oilBlock Copolymers
7DWVXKLUR Kojima, and KHQWR Okoshi*
Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology,
Chitose 066-8655, Japan
We have been studying coil-rod-coil block copolymers, in which a coiled flexible polymer,
polystyrene, is elongated at the end of a very rigid and nonpolar rod-like helical polymer,
polysilane, and have shown that this coil-rod-block copolymer forms a smectic phase due tosegregation of the flexible chains (Figure 1).1 Computer simulations using mechanical models
have revealed that such rod-shaped particles with flexible chains at both ends form a variety ofstructures depending on their rod/coil volume ratio and rod aspect ratio.2 However, few
experimental studies have been reported to substantiate these theoretical predictions. A coil-rodcoil block copolymer was synthesized by elongating polystyrene from both ends of rigid
polysilane using the ATRP method, and its degree of polymerization was 646 of polystyrene,compared to 43 of polysilane (Figure 2).

Figure 1. Smectic phase formed by coil-rodcoil block copolymers

Figure 2. Example of synthesis of coilrod-coil block copolymer

The coiled-rod coil block copolymer did not form the smectic phase, but instead a peculiar
structure appeared, in which two lines are adjacent to each other (Figure 3), and disappeared
when polystyrene included as an impurity was removed (Figure 4). This phenomenon is thought
to be due to the depletion effect caused by the addition of flexible chains, which is to beelucidated.

Figure 3. AFM image of synthesized coil-rodcoil block copolymer

Figure 4. AFM image after removing
impurities

References
1. I. Kato, T. Tanaka, K. Okoshi, Chemistry Letters, 49, 347-349 (2020).
2. M. A. Horsch, Z. Zhang, S. C. Glotzer, Soft Matter, 6, 945-954 (2010).

P27

72

A Study of ZMP-Disturbance Estimation
Based on Image-based Visual Servo for Biped Robot
Konosuke Ichiba and Naoki Oda
Chitose Institute of Science and Technology
m2240070@photon.chitose.ac.jp
Recently, Japan has been facing the problem of declining working population due tothe progression of low birth rates and an aging society. As a result, various kinds of robots
are being introduced in various situation to assist with daily life and working efficiency.
Among them, biped robots are especially expected to adapt to human living environments.
Biped robots require highly reliable stabilization control, and in human living
environments, where environmental changes occur rapidly, real-time performance is also
crucial. In our laboratory, a camera is attached to the waist of the biped robot as shownin Fig.1, and visual servo is performed to keep a specified target at the center of the image
plane. The robot’s current posture and external forces are estimated from the image
information, and stabilization control is performed. In previous research [1], thedisplacement of the Zero Moment Point (ZMP), which is a stability indicator for bipedrobots, was defined as the “ZMP-Disturbance”, representing disturbances acting in theacceleration dimension on the image. Then, ZMP-Disturbance Observer (ZMP-DOB)
was proposed and its effectiveness was demonstrated. However, the accuracy of theestimated value was not confirmed for stabilization control yet.
In this research, the robustness of visual servo is aimed to be improved by using Vision
Space Observer, and ZMP-Disturbance is also estimated with the enhanced ZMP-DOB.
The estimation results of the ZMP-Disturbance in the research are shown in Fig.2. In the
figure, the blue line represents the ZMP acceleration calculated by force sensors, and theorange line represents the ZMP-Disturbance estimated by ZMP-DOB. As can be seenfrom the figure, the ZMP-Disturbance closely matches the profile of actual value, whichshows that the accuracy of the ZMP-DOB has been improved. In the future, we plan to
use this estimated value for ZMP stabilization control.

Fig.1 Biped Robot

Fig.2 ZMP-Disturbance estimation results

References[1] K.Matsumori, “A ZMP Disturbance Estimation and Recovery Control for Biped Walking Robot by Image-based Visual Servo”, Chitose Institute of Scienceand Technology, Master’s Thesis (2022) (in Japanese)

P28

73

Development of 7DOF Redundant Robot Arm
Equipped with Twin Drive System
Naruki Sugawara, Naoki Oda
Chitose Institute of Science and Technology, Chitose 066-8655, Japan
m2240270@photon.chitose.ac.jp
In recent years, the robots have been used in a variety of situations to improve work
efficiency and save labor, and many robot arms have been developed using remote
operation technology. However, the remote operation systems currently being developed
require users to acquire specialized skills, making it difficult to control robot arms as
dexterously as their own arms. In our laboratory, a robot hand, which can be reproduced
the movement of human hand, is being developed [1]. Moreover, we make a robot arm
part by using 3D printer. The arm is designed with 7 degrees of freedom (DOF) toreproduce the complicated movements of the human arm. Additionally, the “Twin Drive
System” was introduced to develop a robot arm for sufficient torque drive withappropriate motion range and lightweight. This system enables high torque output in asmall-limited joint structure by using two motors for each DOF.
In this research, the target angle range of motion of the arm joints is specified in Table
1, and developed 7DOF robot arm achieving the target range is shown in Fig1. The
disturbance observer is employed for robust motion controller. The performance of joint
motion by twin drive system is verified by several experimental results.

Table 1. target angle rangeG-RLQW
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)OH[LRQDQG([WHQVLRQf

Fig 1. 7DOF robot arm
G
References
XG rG zSG uG vSG ” kG G TG G G G 
G G G G G ”SG YWYZG

P29

74

Synthesis of Vinylidenecyclopropanes via Gold(I)-Catalyzed
Cyclopropanation of Vinyl Arenes
Hiroto Mori1, Yusuke Ono1, Shota Nakagawa1, Sota Akima1, Miki Murakami2,
Toshinobu Korenaga3, Tadashi NakajiHirabayashi2, and Yoshikazu Horino*1
1

Department of Applied Chemistry and Bioscience Chitose Institute of Science andTechnology, Chitose 066-8655, Japan
2
Graduate School of Science and Engineering, University of Toyama, 930-8555, Japan3
Department of Applied Chemistry and Bioscience, Iwate University, 020-8551, Japany-horino@photon.chitose.ac.jp
Research on gold-alkylidene and gold-vinylidene-mediated carbon–carbon bondforming reactions, such as olefin cyclopropanation, has been well developed.1) However,
the gold(I)-coordinated allenylidene-mediated carbon–carbon bond forming reaction isunderdeveloped due to lack of catalytic methods to access to such intermediates. We
found for the first time a new method for the catalytic generation of gold(I)-coordinatedallenylidene species by the combination of gold-induced 1,2-stannyl rearrangement ofstannylated alkynes and subsequent bimolecular anti-specific elimination. We herein
report the unprecedented generation of gold(I)-coordinated allenylidene species, applied
for the cyclopropanation of vinyl arenes.

Figure 1. Gold(I)- carbene
The reaction of 1 and vinyl arene 2 in the presence of (Ph3P)AuCl/AgSbF6 (5 mol%)in CH2Cl2 at 25 °C afforded the desired VDCP 3 as a mixture of diastereomers (eqn 1).
To obtain detail information on the mechanism of cyclopropanation, the DFT calculations
were performed. Although concerted cyclopropanation was proposed in the previously
reported reaction of styrene with gold(I)-coordinated benzylidene, it was found that thecyclopropane ring was constructed by a stepwise mechanism in the present case. The
vinyl arene 2 attacks to CĮ of the gold(I)-stabilized propargyl cation B not the predicted
form A to give a benzylic carbocation intermediate. The detail of this reaction mechanism
will be presented.

References
1) D. Benitez, N. D. Shapiro, E. Tkatchouk, Y. Wang, W. A. Goddard, F. D. Toste, Nat, Chem.
2009, 1, 482.

P30

75

Stereoselective Synthesis of (Z)-anti-Homoallylic Alcohols Using
Palladium-Catalyzed Three-Component Reaction
Ayumu Natsubori1 and Yoshikazu Horino*1
1

Department of Applied Chemistry and Bioscience Chitose Institute of Science andTechnology, Chitose 066-8655, Japany-horino@photon.chitose.ac.jp

Three-component reactions are useful synthetic methods as they not only shorten thereaction process but also enable efficient stereoselective synthesis of target molecules.
We have previously reported the palladium-catalyzed three-component reaction of
benzaldehyde (1a), 3-(pinacolatoboryl)allyl acetates 2a, and triorganoboranes (3a) toprovide (Z)-anti-homoallylic alcohol 4aaa (eqn. 1).1) However, the method offers narrow
functional group tolerance as the trialkylboranes used in this reaction was preparedby hydroboration of the corresponding alkenes. On the other hand, organozinc
reagents are easily prepared by either the direct insertion of zinc metal or transmetallation
with zinc salts. In this study, we report a three-component reaction using organozinc
reagents instead of the trialkylboranes, and found that a highly diastereoselective threecomponent coupling reaction proceeded to give (Z)-anti-homoallyl alcohols (eqn. 2).


We initially examined the reaction of 1a, 2a, and commercially available diethyl
zinc (5a) in the presence of catalytic amounts of Pd(OAc)2 and (4-CF3C6H4)3P (eqn. 2).
We were pleased to find that the corresponding (Z)-anti-homoallylic alcohol 4aaa was
obtained in 76% isolated yield. The transfer of chiral information from chiral substrates
to products (chirality transfer reaction) can generate enantiomerically enriched molecules,
but the control of stereochemistry often proves challenging. Interestingly, while moderatechirality transfer was observed in our previous study (eqn. 1), the present system showed
the excellent chirality transfer (94.5 %es). The detail of this reaction mechanism andscope of organozinc reagents as well as chirality transfer reaction will be presented.

G

Reference
1) Y. Horino, A. Aimono, H. Abe, Org. Lett. 2015, 17, 2824-2827.G

P31

76

Synthesis of 2-Vinylnapthalenes via Gold(I)-Catalyzed
Cyclopropanation of Indenes
Shota Nakagawa1 and Yoshikazu Horino*1
1

Department of Applied Chemistry and Bioscience Chitose Institute of Science andTechnology, Chitose 066-8655, Japany-horino@photon.chitose.ac.jp

We previously reported that the reaction of propargylic esters 1 having stannyl groupat alkyne terminus with vinyl arenes2 in the presence of a cationic gold(I) catalyst affords
vinylidenecyclopropanes (VDCPs) 3 as a mixture of diastereomers (eqn 1).1) It was foundthat gold(I)-stabilized propargyl cation species B is generated rather than gold(I)coordinated allenylidene species A in this system.
previous work
AcO
SnBu3 +

R

Ar
2

1

Ar

5 mol% Au+

HR

CH2Cl2rtγ+• Au(L)

•
β

α

H
R

+

A

•

Au(L)

(1)

R

B

3

VDCPs are synthetically valuable molecules due to their extraordinary properties.
For example, the estimated strain energy of VDCP is 50.9 kcal/mol, while that of
cyclopropane and methylenecyclopropane is 27.5 and 40.9 kcal/mol, respectively.2) In
this study, we found that the reaction of indene 4 with tributylstannylated propargylic
acetates 1 in the presence of gold(I) catalyst yielded 2-vinyl-substituted naphthalene
derivatives 5 (eqn 2). Interestingly, the reaction proceeded when JohnPhos or IPr ligands
were used. On the other hand, the use of phosphine ligands other than JohnPhos or IPr
provided cyclopropanation reaction products. Next, the ring expansion reaction of 4a was
examined to determine whether this reaction proceeds via the vinylidene cyclopropane
derivative 3 (eqn 3). As a result, 5a was obtained in 79% yield. This control experiment
revealed that the present reaction proceeds in a tandem fashion.
The detail of this reaction mechanism will be presented.

1

+

X
4

5 mol%(JohnPhos)Au(MeCN)SbF6
CH2Cl2
rt, 1 h

X

•
R

3

R
X

5

5 mol%(JohnPhos)Au(MeCN)SbF6

•
Ph
4a

CH2Cl2
rt, 10 min

(2)

(3)
Ph
5a, 79%, cis:trans = 1:1.7

1) H. Mori, Y. Ono, S. Nakagawa, S. Akima, M. Murakami, T. Korenaga, T. NakajiHirabayashi, M. Kyogoku, Y. Horino, submitted.
2) R. D. Bach, O. Dmitrenko, J. Am. Chem. Soc., 2004, 126, 4444–4452.

P32

77

Transition-Metal-Free Synthesis of Homopropargylic Alcohols
Haruya Hirano1 and Yoshikazu Horino*1
1

Department of Applied Chemistry and Bioscience Chitose Institute of Science andTechnology, Chitose 066-8655, Japany-horino@photon.chitose.ac.jp

Homopropargyl alcohols are not only used as useful synthetic building brocks, butalso privileged structure in many biologically active natural products and agrochemicals.
Given the importance of homopropargyl alcohols, efforts have been devoted to thedevelopment of efficient and practical methods for their synthesis. Despite remarkableprogress, there are still few reports on the synthetic methods under transition metal-free
conditions.
Previously, our laboratory has reported a transition-metal-free three-component
process that combines aldehydes 1, 3-(tributylstannyl)propargyl acetates 2 formed in situ
from readily available propargyl acetates, and trialkylboranes 3 provides access to a range
of 1,2,4-trisubstituted homopropargylic alcohols 4 (eqn 1).1) Considering theenvironmentally benign processes, avoiding the use of organostannanes is desirable andmore environmentally benign alternative protocols are required. We herein report a noveland green route for the synthesis of homopropargyl alcohol derivatives 4 without the useof transition metals and organostannanes (eqn 2).

Reference
1) Y. Horino, et al. Org. Lett. 2019, 21, 9564-9568.

P33

78

Synthesis of new reusable cage-shaped phosphine ligands
Mizuki Oda1 and Yoshikazu Horino*1
1

Department of Applied Chemistry and Bioscience Chitose Institute of Science andTechnology, Chitose 066-8655, Japany-horino@photon.chitose.ac.jp

Palladium metal-catalyzed cross-coupling reactions are very useful for the synthesisof functional materials.1) Usually, phosphine ligands are used to stabilize the catalyticcally active Pd(0) species. However, phosphine ligands are easily oxidized, producing
inactive palladium black and phosphine oxide at the end of the reaction. On the other
hand, phosphine sulfide ligands, in which the phosphorus ligands are sulfurized, are noteasily air oxidized and the catalyst can be recycled, but the oxidation of the central metal cannot prevent a decrease in catalytic activity.2㸧
Therefore, the aim of this study is to synthesize cage-shaped phosphine ligands, which are highly stable and can maintain catalytic activity for a long time. H
ere we report a route to synthesize bowl-shaped ligand precursors (Fig. 1), which are precursors of cage-shaped phosphine ligands (Scheme1).
P
P
P

O

P
O

O
O

O

O

Fig. 1 bowl-shaped ligand precursors

References
1. R. Sato, T.Kanbara, J. Kuwabara, Organomet, 2020, 39, 235-238.
2. S. Aizawa, A. Majumder, Y. Yokoyama, M. Tamai, D. Maeda and A. Kitamura,
Organomet, 2009, 28, 6072-6067.

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Evaluation of Source Code that Includes
Perspectives of Ease of Handover Measured by Class Cohesion
Mayu Sudo1, and Hiroto Yamakawa1

1

Graduate School of Science and Technology, Chitose Institute of Science andTechnology, Chitose 066-8655, Japan
m2240300@photon.chitose.ac.jp

In Project-Based Learning (PBL) in higher education, which aims to train IT
engineers, there are cases where part of software development is handed over to a new
project, and development continues. Therefore, the software should be made with sourcecode that is easy to hand over from an objective viewpoint. The purpose of this study isto reveal the methods to incorporate "ease of source code handover". In PBL, learners
continue the advanced development of software by reading maps between requirements
for the implementation of the request of customer role and the internal structure ofsoftware. Therefore, we assumed that the source code that is easy to hand over has thefollowing three objectively high perspectives: 1. Understandability of modules
responsibility, 2. Understandability of the structure of source code based on requirements,and 3. Understandability of software behavior. To incorporate perspectives 1 and 2, weused domain-driven design methods that prepare the requirements document supervised
by customers and developers and reflect it in modeling and source code. To incorporate
perspective 3, we used the test-driven development methods.
Based on the source code as legacy code made by the learner and the journal articleof HANASHI-KOTOBA Checker[1], modeling and refactoring were performed withexperts aiming to include three perspectives. In the expert’s source code, classes that
corresponded to the keywords used by the customer and the procedures for therequirements were created by modeling from the journal article, and a test case wasprovided to observe the behavior. We have confirmed perspective 1 using class cohesionthat was measured using five metrics of jPeek[2](Table 1). The legacy code changed that
there are a large number of highly cohesive classes that reflect the requirements
implementation procedure. We were able to satisfy perspective 1 to some extent. In the
future, we will evaluate and verify perspectives 2 and 3 and build methods to incorporate
the ease of handover source code into learners’ actual development.
Table 1. Comparison of number of classes and class cohesion score

References[1] Yamashita, Y., et al. (2021), Development and Evaluation of Japanese Colloqu
ial Writing Checker, Transactions of Japanese Society for Information and Sys
tems in Education, Vol. 38, No.4, pp. 369-374[2] jPeek, https://github.com/cqfn/jpeek (accessed Aug. 17, 2024)

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Development and Implementation test of LTI Gateway System to
Improve Interoperability of Educational Systems
Toshinobu Kamada1 and Hiroto Yamakawa1
1

Graduate School of Science and Engineering, Chitose Institute of Science andTechnology, Chitose 066-8655, Japan
m2240190@photon.chitose.ac.jp

For the demand for highly interoperable educational systems, it is important to findways to make various educational systems easily used as Learning Tools
Interoperability (LTI)[1] based systems. The purpose of this study is to develop an LTI
gateway system that will enable educational systems that have yet to be LTI-tooled to be
used as LTI tools.
Figure 1 shows a system overview of the architecture of the LTI gateway tool
proposed in this study. The proposed method is to prepare an LTI gateway system foran educational system (we call it External Tool) that we wish to convert into an LTI
tool. The LTI Gateway System provides basic LTI features to the LTI platform. On theother hand, it represents requests and responses to the External Tool. This method will
provide services from the External Tool to the LTI platform as if they were by the LTI
Tool.
This paper reports the results of two implementation test of represents external tools
from the LTI gateway System. The first implementation is the LTI Gateway System
redirects requests from the LTI platform directly to the External Tool. The second
implementation is instead of redirecting, the LTI Gateway System executes a new
request based on the request from the LTI platform and returns the results to the LTI
platform.
As a result, it was found that both methods could represent the External Tool's service
to the LTI platform side. However, when considering the support for the more diverse
functions of LTI, it became clear that the second method was more suitable.

Figure 1. System Overview
References[1]G1EdTechConsortium㸸͇Learning Tools Interoperability͇
https://www.1edtech.org/standards/lti(accessed Aug 2024)

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Investigation of the inactivation effects of different UV intensity
at 213 nm and irradiation time.
Tatsuro Kagawa1, Kazuhiro Dainaka1 and Nobuhiro Umemura1
1

Chitose Institute of Science and Technology, Bibi 758-65, Chitose,
Hokkaido 066-8655, Japan
E-mail address : umemura@photon.chitose.ac.jp

1. Abstract
We study on sterilization in agar medium by irradiating pulsed deep ultraviolet(UV) laser
radiation at 213 nm. Based on previous research results [1,2], we examine high UV pulse
energy with short irradiation time and low UV pulse energy with long irradiation time.
2. Material and Experimental Method
Microorganisms used in this experiment were Staphylococcus aureus (NBRC 13276)
strains. S. aureus were cultured in 50 mL LB medium for 16 hours at 37℃ to achieve
stationary phase. Next, we exerted E. coli from LB medium and diluted in 1×PBS buffer
to achieve optical density to 0.01 at 600 nm wavelength. Prior to UV dose, 100μL solution
was taken and spread on agar medium. After UV dose, agar medium was incubated for
24 hours at 37℃ and the sterilization effect was evaluated from a ratio of cultured colony
area on a petri plate analyzed by Image-J software.
1064 nmIn this study, we used Nd:YAG laser
Nd:YAG Laser
operating at a repetition rate of 10Hz
β - BBO
β - BBO
KTP
were used as an UV light source. The
experimental setup for 5HG is shown in45˅
213 nmmirrorFig. 1. We expanded the UV beam to
213 nmcover all area of a petri plate.
Wavelength : 1064 nm
Repetition Rate : 10Hz
Pulse duration : 8 ns

Concave Lens
f = -30mm

3. Experimental Results
Fig. 2 shows the results for thesterilization effect of S. aureus. We
confirmed that low UV pulse energy with Fig 1 Experimental setup for 5HG at 213 nm
long irradiation time shows higher
sterilization effect than that of high pulse energy with short irradiation time. The tendencyof this result had been reported in Nagoya City University in 2022 [2].
Petri dish

100

Reports (2022)

Low UV Intensity, Short Exposure time

Ratio of colony area [%]References[1] N. Umemura et al., ALPSp1-05(2023)[2] K. Dainaka, Masters Thesis of
CIST (2024)[3] T. Matsumoto et al., ScientificHigh UV Intensity, Long Exposure time

80

Previous Experimental Results
60

40

20

0
0

50

100
150
Total dose energy [mJ/cm2]

Fig 2 Sterilization effect of S. aureus

200

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82

Elucidation of anomalous fluorescence properties of 2,4-bis(1,3benzothiazolylphenol derivatives
Yuma Hirose1, Haruto Yamakawa1, Ken-ichi Sakai1 and Tomoyuki Akutagawa2
1

Chitose Institute of Science and Technology
2
IMRAM, Tohoku university
m2240400@photon.chitose.ac.jp

 2,4-bis(1,3-benzothiazol2-yl)-phenol (2,4-DBTP)
emits yellow fluorescence with a large Stokes shift
due to excited-state intramolecular proton transfer(ESIPT). Alkoxylation of the hydroxy group at the
ESIPT site of this molecule results in a comparable
Stokes shift in the crystalline state and orange
fluorescence with a maximum around 570 nm, even though ESIPT is no longer
assumed(Fig. 1, left). In solution, it emits a variety of fluorescence depending on the typeof solvent and dye concentration. In acetone solution, blue-violet fluorescence with amaximum around 400 nm appears (Fig. 1, right). As the concentration of the dye
increased, the intensity of this fluorescence decreased markedly, while blue-green
fluorescence with a maximum near 500 nm appeared. At that time, the colorless solution
also turned yellow, and the absorption and fluorescence spectra were found to have amirror image relationship with a small Stokes shift, probably originating from theaggregates. We believe that the benzothiazole group in the para-position of the alkoxygroup is responsible for this unique fluorescence, and we are currently synthesizing
molecules with other benzoazole groupsሺଵ ǡ ଶ ൌ ǡ  ሻ by changing the benzothiazole
groups in the para and ortho positions and investigating their fluorescent properties.

Figure 1. Fluorescence and excitation spectra of (left) powder of alkoxylated 2,4-DBTP
and (right) fluorescence spectrum in acetone solution as a function of dye concentration.

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83

Analysis of the Aggregated Structure of C3-Symmetric Moleculeswith a Cyclic Hydrogen Bonding Network
Akihiro Kakiyama1, Manami Uemura1, Ken-ichi Sakai1 and Tomoyuki Akutagawa2
1

Department of Applied Chemistry and Bioscience, Chitose Institute of Scienceand Technology, 2IMRAM, Tohoku university

Email: b2210620@photon.chitose.ac.jp

In this study, we synthesized C3-symmetric molecules with a cyclic hydrogen bonding
network centered in the structure (Figure 1) and observed their aggregate formation in
CHCl₃ solution using ultraviolet-visible absorption spectroscopy. Additionally, we
analyzed the molecular aggregation structures in the solvent using Raman spectroscopy.
As a result, for both molecules—one with methoxy substituents at the terminal and theother with methyl substituents—a new absorption peak appeared in the visible lightregion (at 530nm) with increasing solution concentration, which was absent at low
concentrations, confirming aggregate formation in both cases. Notably, the rate ofabsorbance increase was greater for the methoxy-substituted molecule than for the
methyl-substituted one, suggesting that intermolecular interactions involving the terminal
substituents may influence aggregate formation. Furthermore, in the Raman spectrum
within the range of 1200–1900 cm⁻¹, no peak shifts corresponding to functional groups
were observed with increasing concentration, indicating the need for reevaluation of thesolvent and measurement conditions.

Figure 1: The chemical structure of the synthesized molecule.

P39

84

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P40

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P41

86

A Survey on Colorization Techniques for Near-Infrared Images
Shunsuke Shimada1, Yasuhiro Takano1 and Yoshiaki Shiraishi2
1

Grad. School of Sci. & Tech., Chitose Institute of Science and Technology
2Grad. School of Engineering, Kobe University{m2240260, y-takano}@photon.chitose.ac.jp

Near-infrared (NIR) cameras are widely used for foreign object detection-, smart
vehicular-, and night vision security-systems, since they can capture NIR spectrums ofwhich reflection response corresponds to the materials of target objects. NIR images areoften recoded in a gray-scale format by converting the NIR spectrums that invisible forhuman. It is, however, preferable for human to easily recognize the image in a color
format like the red-green-blue (RGB) model. In this initial technical report, we verify
conventional colorization techniques for NIR images to confirm those accuracy andpotential problems. Specifically, autoencoder (AE)-based [1] and deep-convolutional
generative adversarial network (DCGAN)-based [2] colorization techniques areinvestigated. Figure 1 illustrates the verification results for five cases according to thecolumns, where input NIR images in the gray-scale format and the ground truth images
in RGB format are respectively shown in the first and second rows. According to ourverification, the DCGAN-based technique obtains a 10 dB gain over the AE in terms of
average peak signal-to-noise ratio(PSNR) performance. This is because,
as shown in the 4th row of Figure 1,
DCGAN-based technique achieves
PSNR=22.9 dB after learning NIR
images expectedly. However, as
shown in the 3rd row, the AE-based
technique deteriorates PSNR=12.4 dB.
NIR images have unique spectral
properties that differ significantly
from those of visible light images.
Since AE assumes input images to begrayscale representations of visible
light, it cannot accurately map the NIR
spectral data to corresponding RGB Figure 1.Verification results for 5 cases by columns. 1st rcolors, resulting in a noticeable drop ow: NIR inputs, 2nd row: ground truth data in RGB, 3rd row: outputs with AE, 4th row: outputs with DCGAN
in PSNR.
References[1] G. E. Hinton, R. R. Salakhutdinov, “Reducing the Dimensionality of Data with
Neural Networks,” Science, vol. 313, pp.504-507, 2006.
[2] A. Radford, L. Metz and S. Chintala, “Unsupervised Representation Learning with
Deep Convolutional Generative Adversarial Networks,” arXiv, 2016.
https://arxiv.org/abs/1511.06434

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Control of Photoinduced Electron Transfer via SupramolecularComplex Formation of Polymers with Electron-Donor Molecules
Hiroyasu Yamaguchi1,*, Yilin Cao1, Hikaru Sotome2 and Syoji Ito2
12

Graduate School of Science, Osaka University, Osaka 560-0043, Japan
Graduate School of Engineering Science, Osaka University, Osaka 560-0043, Japanhiroyasu@chem.sci.osaka-u.ac.jp

To transfer electrons efficiently
from electron donors to electron
acceptors, the distance between the twomust be maintained appropriately toprevent reverse electron transfer. In thisstudy, we report our finding that theamount of electron transfer products canbe increased by adding polymers thatcan specifically form complexes withelectron donors through various types of
non-covalent bonds (Figure 1).
Polyvinylpyrrolidone (PVP) was
found to form complex with pigments
5,10,15,20-tetrakis-(4-sulfonatophenyl)
porphyrin (TPPS) and its zinc complex Figure 1. The chemical structures of electron(ZnTPPS)quantitatively
through donors (TPPS and ZnTPPS), electron acceptor
different interactions (hydrogen bonds (MV2+), and polymers used in this study (PVP andand coordination bonds, respectively) P4VPMe).
(Figure 2). These complex formations
hinder the interaction between groundstate TPPS or ZnTPPS and an electron
acceptor (methyl viologen, MV2+) andcould control the photoinduced electrontransfer from TPPS or ZnTPPS to MV2+,
giving more electron transfer products
methyl viologen cationic radical(MV+•).1
An artificial photoinduced electrontransfer system within a poly(N-methyl4-vinylpyridinium) (P4VPMe) polymerGmatrix was also developed. In the2.
Conceptual
figuresof(a)TPPS/PVP
and
Figurepresence of an excess of P4VPMe,
ZnTPPS exists as individual molecules (b) ZnTPPS/PVP complexes.
rather than self-aggregating, favoring
photoinduced electron transfer. Under these conditions, P4VPMe inhibits the formationof ground-state charge-transfer complex between ZnTPPS and MV2+. This shifts the mainelectron transfer process from singlet to triplet states. ZnTPPS with an excess of P4VPMe
increased the catalytic activity of photoinduced oxidation of MV2+ more than 10-foldcompared to ZnTPPS alone (Figure 1b).2
References
1 Y. Cao, T. Takasaki, S. Yamashita, Y. Mizutani, A. Harada, H. Yamaguchi,
Polymers 14, 1191 (2022).
2 Y. Cao, H. Sotome, Y. Kobayashi, S. Ito, H. Yamaguchi, J. Photochem. Photobiol. A
452, 115593 (2024).

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88

Functionalization of Supramolecular Complexes by Hybridization ofTransition Metal Complexes with Biomolecules
Hiroyasu Yamaguchi1,*, Yuichiro Kobayashi1 and Akira Harada2
1

Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
2
SANKEN, Osaka University, Ibaraki, Osaka 567-0047, Japanhiroyasu@chem.sci.osaka-u.ac.jp

In biological systems, life processes are led by the unique behavior ofmacromolecules such as proteins and DNA. Molecular recognition by macromolecules
plays an important role, for example, in substrate specificity of enzymes and antigenantibody reactions in human life. Selective molecular recognition among macromolecules
is achieved through a large number of weak interactions. We have developed novel
materials through hybridization of bio-related macromolecules with synthetic small
molecules. We constructed functionalized catalytic systems based on specific molecular
recognition of bio-related polymers and selective assembly of bio/synthetic molecules.
Horseradish peroxidase (HRP) exhibits catalytic activity when L-histidine, at theactive site of apohorseradish peroxidase (apoHRP), and iron porphyrin (FePor) form acomplex via a metal–ligand interaction. The catalytic activities cannot be expressed by
apoHRP alone. One clear
challengeindeveloping
catalysts is the ability to control
their activity on demand. A
controlled catalytic system,
operated via mechanical forces,
is versatile. However, there are
few reports concerning catalytic
activity via mechanical forces.
Here, we report a system toexpress catalytic activity byadhesion of an apoenzyme gel
and a cofactor gel. The
apoenzyme- and cofactor gels
(Figure 1a) act as catalysts
when they form an assembly,
but they lose catalytic ability
upon
manualdissociation
Figure 1. Chemical structures of apoHRP(x) gel and(Figure 1b). We successfully FePor(y) gel. a ApoHRP or FePor moieties areconstructed a system with modified with poly(acrylamide) based gels. x and ycontrollable catalytic activity indicate the mol% of apoHRP and FePor moieties,
via the adhesion of gels at the respectively. b Switchable catalytic activity system via
adhesion and separation of apoHRP gel with FePor gel.
macroscale.

P44

89

Convex-tape Driven Parallel Robot For 3D Shape Reconstruction
Reo Yamada1* and Hirooki Aoki1
1

Graduate School of Science and Technology, Chitose Institute of Science andTechnology, Chitose 066-8655, Japan
2
Faculty of Science and Technology, Chitose Institute of Science and Technology,
Chitose 066-8655, Japan
m2230360@photon.ac.jp
This study aims to construct a system to acquire 3D shape information of the entire
circumference of plants without deforming them, which can be used for monitoring
growth in plant factories. We propose a method to acquire 3D point clouds of plants frommultiple directions using Convex-tape Driven Parallel Robot. Furthermore, allsurrounding 3D shape reconstruction is performed. Convex-tape Driven Parallel Robots
use convex tapes as a force transmission medium [1]. Convex tape can increase the rangeof motion. Using a prototype robot (Fig 1) to move an RGB-D camera, multiple-frame
3D point clouds were reconstructed from RGB and depth images. These point clouds
were then aligned and combined using the ICP algorithm, and a detailed all-surrounding
3D shape was reconstructed (Fig 2).
References
1 R. Yamada, H. Aoki: “Construction of New Cable-Driven Parallel Robot Using
Convex Tapes for 3D reconstruction”, International Workshop on Frontiers ofComputer Vision (2024)

PRWRU&RQYH[WDSH(a) 0°(b)40°(c)80°(d) 120(e)160°(f)200°(g) 240°(h)280°(i)320°'ULYLQJV\VWHP
5*%'FDPHUD

)UDPH
3ODQW

Figure 1. Prototype robot

 Figure 2. Reconstructed 3D point cloud.

P45

90

Proposal for estimating the Volume of Cherry Tomatoes
by 3D Image Measurement
Shimpei Okado1, Hirooki Aoki2
1

Graduate School of Science and Technology, Chitose Institute of Science andTechnology, Chitose, 066-8655, Japan
2
Faculty of School of Science and Technology, Chitose Institute of Science andTechnology, Chitose, 066-8655, Japan
m2240110@photon.chitose.ac.jp
Quantitative evaluation of plant growth is useful in optimizing the growth environment
in plant factories. As a method for quantifying plant growth, 3D shape measurement using
3D image sensors has been reported in many cases. To evaluate the growth of fruit
vegetables we have conducted a study to quantify the growth by calculating the volumeof fruits using a 3D image sensor. In this study, we propose a method to quantify thegrowth of cherry tomatoes.
The measurement system is shown in Figure 1. A 3D image sensor, Intel RealSense
Depth Camera D415, was used to acquire the 3D point cloud of cherry tomatoes. The
D415 images target on the plane from an oblique upward direction, and the reconstructed
3D point cloud is rotated so the plane is horizontal. By projecting the 3D point cloudtoward the plane, orthographic projection is performed and an ortho image is obtained. In
our proposed method, dimensional information is added to the ortho image by mapping
one pixel to 1mm x 1mm. Semantic segmentation using SegNet was applied to the ortho
image to extract the regions of cherry tomato fruit. The 3D point cloud of cherry tomato
fruit was reconstructed from the pixels corresponding to the regions. Aftercomplementing the occluded region, the volume was estimated by approximating theellipsoid sphere using the iterative least-squares method. Initial and lower bounds forunknowns in the iterative calculations were set from the number of pixels in the regionsof cherry tomato fruit.
The volume of five cherry tomatoes was estimated, and the errors between theestimation results and ground truth of the volume was determined. Ground truth wasmeasured from the change in the volume of water using a measuring cylinder. The results
are shown in Table 1. For all samples, the error was less than 1 ml, indicating that volume
estimation was feasible. In the future, we plan to measure changes in the volume of cherry
tomatoes over time to quantify their growth.
ϰϭϱ

Table 1. Volume Estimation Results [ml]WŚĞƌƌǇdŽŵĂƚŽĞƐ

ůĂĐŬ
ŽĂƌĚ

Figure 1. Measurement System

G

CT1

CT2

CT3

CT4

CT5

Estimation
Results
Ground
Truth

6.47

4.35

6.02

6.53

4.35

7.0

4.9

6.9

6.8

4.9

Error

-0.53

-0.55

-0.88

-0.27

-0.37

P46

91

Sample preparationt
for characterizing soft and hard tissues using
Fourier transformm infrared spectroscopy in attenuated total reflectionmode
Miu Murao and Hiromi Kimura-Suda
Graduate School of Science and Technology, Chitose Institute of Science andTechnology, Chitose 066-8655, Japane-mail: kimurasu@photon.chitose.ac.jp
Fourier transform infrared (FTIR) spectroscopy is a powerful tool for thecharacterization soft and hard tissues. We have been working on development of methods
for assessing bone quality, including structural and material properties, using FTIR
imaging. The FTIR image can provide information on the distribution of chemicalcomposition and is therefore useful for determining the distribution of bone quality
factors in bone tissue with heterogeneous compositional distribution. On the other hand,
FTIR imaging is not suitable for clinical applications because of the time-consuming
sample preparation required. Attenuated total reflection (ATR) mode has potential as aneasier and faster method to evaluate bone quality using FTIR spectroscopy. In this study,
we investigated sample preparation for the clinical application of the ATR mode for theevaluation of soft and hard tissues. Vertebrae and cartilage of adult kokanee salmoncaught in Lake Shikotsu were removed and characterized before and after drying using
FTIR spectroscopy in ATR and transmission modes. The ATR spectra of the fresh
vertebrae showed significant shifts in both the amide l and PO43- bands compared to thetransmission spectra. To investigate the influence of water on the band shifts observed in
the FTIR spectra of vertebrae, we compared the ATR spectra of cartilage before and after
drying. With or without drying, the amide bands were shifted compared to those obtainedin transmission mode (Figure 1). These results indicated that when evaluating cartilage
and bone using the ATR mode, it may not be necessary to take into consideration theinfluence of water contained in the sample.
Amide ll

1700

1500

Amide lAmide ll

1700

1500

Abs.

Abs.

Amide l1300

Wavenumber / cm-1

1100

900

1300

1100

900

Wavenumber / cm-1

Figure 1. FTIR spectra of nucleus pulposus in kokanee salmon before (left) and after(right) drying, acquired in the ATR (bold line) and transmission (dashed line) modes.
Referencesͳ Kimura-Suda H, Takahata M, Ito T, Shimizu T, Kanazawa K, Ota M, et al. PLoS
ONE 13(2): e0189650 (2018).

P47

92

Single-Shot Chirped Pulse Phase-Shifting Digital holography for
Capturing Ultrafast Optical Wavefront Sequences
Wataru Fukuda* and Naoki Karasawa
Graduate School of Science and Technology, Chitose Institute of Science andTechnology, 758-65 Bibi Chitose, 066-8655, Japan
m2230300@photon.chitose.ac.jp
In our laboratory, we previously demonstrated the capture of ultrafast optical wavefront
sequences using chirped pulse phase-shifting digital holography [1]. In this study, wedemonstrated the capture of ultrafast optical wavefront sequences using single-shot
chirped pulse phase-shifting digital holography.
Figure 1 shows the experimental optical system. The object pulse divided by BS2
passes through a pentagon-shaped slit with a concave lens of 2 m focal length and a starshaped slit with a convex lens of 2 m focal length, respectively. The reference pulse ischirped by high refractive index glass and becomes circularly polarized by a 1/4 plate.
The timing of the reference light is adjusted such that it interferes with the object light
passing through the pentagon-shaped slit on the long wavelength (802 nm) side and withthe object light passing through the star-shaped slit on the short wavelength (791 nm) side.
The interference light is split into two by the DOE, and each light wave is incident on the
BPF at different angles, allowing only light of a specific wavelength to pass through. The
split light is recorded by a polarization camera in different regions as intensity images infour different linear polarization directions. A pulse picker is used to select one pulse
every 1/8 s, and its output signal is used to trigger the exposure of a polarization camera.
The exposure time of the camera is set to be 1.048 μs and the delay time of the pulse is
set to be 124.778 ms. The light wavefront of each object light is reconstructed using acomputer.
Figure 2 shows the reconstructed images. (a), (a') are amplitude and phase images ofthe object pulse on the long wavelength side, while (b), (b') are those on the shorthe ultrwavefrwavelength side. From the results, it is shown that theultrafast optical wavefront(a)(b)
ase-shidigitalg holograp
g psequences can be recorded by single-shot chirped pulse phase-shiftingholography.
delay
y

(a)

(b)

(a’)

(b’)

(a’)

(b’)

BS1
Ti: Sa Laser(800 nm,73 MHz,500mw)

Slit
concave lenss Object
pulse
BS2

delay

Glass block
Chirpedreference pulse
1/4
recorded
wavelength plate
platte holograms
BPF
BS3
PolarizationP
DOE PolSlitcameraconvex lensFigure 1. Experimental Setup, BS: Beam Splitter, DOE:
Diffractive Optical Element, BPF: Band Pass filter

Figure 2. (a), and (b) show thereconstructed amplitude images. (a’),
and (b’) show the reconstructed phase
images. (a), and (a’) show the longwavelength images. (b), and (b’)
show the short wavelength image.

References[1] W. Fukuda and N. Karasawa, “Demonstration of chirped pulse phase-shifting digitalholography for capturing the sequence of ultrafast optical wavefronts,” Applied optics,
Vol. 63, Issue 20, pp. 5472-5478 (2024)

P48

93

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Development of medical adhesive materials with removability byexternal stimulation
Eri SEITOKU1, Sirus SAFAEE1, Mahdis NESABI1, Ko NAKANISHI2, Yuko ERA3
Alireza VALANEZHAD1, Shigeaki ABE1,*, Tomoya TAKADA4,
Hiroshi MURATA1 and Ikuya WATANABE1
1

Graduate School of Biomedical Science, Nagasaki University, Nagasaki 095-8102,
Japan
2
Faculty of Dentisity, Hokkaido University, Sapporo 060-8586, Japan
3
Saitama Prefectural University, Sannomiya 820, Kawagoe 343-8540, Japan
6
Graduate School of Science and Technology, Chitose Institute of Science andTechnology, Chitose Japansabe_den@nagasaki-u.ac.jp

In general, medical/dental adhesive materials in surgical fields are required strong
mechanical property and adhesive property to the hard tissue. Based on theseviewpoints, many researchers investigated then some adhesives were developed, such as
PMMA resin cement. In contrast, the strong adhesion property sometimes generated
some problems when removal the attached materials. In case of dental orthodontic
fields, the strong adhesion sometimes induced invasive procedures on tooth whenorthodontic anchoring screws were removed [1]. Therefore, it is required to reduce theadhesion strength on the screw removal. In this study, we investigated to control theadhesive property by external stimulation such as thermal process. For example, wehave developed polyacrylamide derivatives hydrogel composite in previous study [2].
They can indicate reversive sol-gel conversion by external stimulation such astemperature change generated by IR light. Because carbon nanotube (CNT) can carryout effective light-thermal conversion under IR irradiation, the light irradiation induced
thermal sol-gel conversion on the hydrogel composite contained CNT. Thus, thecompounds are mixed into the adhesive materials then estimated the mechanicalstrength with/without external stimulation.
References
1 S. Yamagata et al., Nano Biomedicine, 8, 35-40, (2016).
2 S. Abe et al., Molecular Crystals and Liquid Crystals, 763, 73-79, (2023).

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Effects of tree species on nitrogen deposition in forest stands aroundthe livestock area
Masaharu Kato1, Jun’ichiro Ide1 and Izuki Endo1
1

Department of Applied Chemistry and Bioscience, Chitose Institute of Science andTechnology, Chitose 066-8655, Japan
m2240170@photon.chitose.ac.jp

In livestock areas, ammonia volatilization occurs during the composting process of
livestock manure, which provides large amounts of nitrogen (N) to the surrounding land
cover, such as forests. N emissions sometimes exceed the N saturation standard1 (10 kgN
ha–1 y–1), which can in turn impact the nearby forests and thereby result in high levels of
nitrate in forest streams. Previous studies have shown that different forest species, suchas birch and oak, can change the rainfall partitioning and affect the deposition of N andother air pollutants. However, few studies have addressed how much differences in N
deposition are there between forest stands with different tree species in livestock areas
with high N deposition. Therefore, the purpose of this study was to clarify the extent towhich N deposition differs between forest stands with different tree species in the
livestock area.
Rainwater samplers were installed in Bibi park, located in Chitose, Japan, as a livestockarea to collect throughfall water (TF) in the birch and oak forest stands (n = 3 for each)
fortnightly from June to November 2023. Simultaneously, rainwater (RF) was alsocollected using the same samplers (n = 3) in the open area near the park. In collecting
water samples, the amount of RF and TF were measured. After that, nitrate (NO3–) andammonium (NH4+) concentrations in the samples were measured using ion
chromatography in the laboratory.G In this study, N depositions through RF and TF were
calculated by multiplying the amount of RF and TF and the sum of NO3–-N and NH4+-N
concentrations obtained fortnightly, summing those fortnight values during theobservation period, and converting the duration values to the annual values, respectively.
N deposition through RF was calculated to be 12.4 kgN ha–1 y–1, indicating that it could
be higher than the national average of bulk deposition (10.5 kgN ha-1 y–1). The average N
deposition through TF was 6.2 kgN ha–1 y–1 in the oak stand and 5.9 kgN ha-1 y–1 in thebirch stand, which showed no significant difference. It is predicted that the similar
physical characteristics of the two species, such as tree height and crown structure,affected dry and wet deposition processes rather than physiological characteristics,
resulting in the similar N deposition through TF between the species in this study. The
large differences in N deposition between RF and TF were attributable to the N absorption
by the tree canopy2. Because of ammonia volatilization from the livestock manure, it ishighly possible that tree canopy adsorbs the large amount of NH4+ through dry and wet
deposition in the forests in the vicinity of the livestock area.
References
1. Tokuchi N, et al. J Jpn For Soc 105(6), 199-208. (2023).
2. Otuki K et al. (eds.) An introduction to forest hydrology (2022).

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5HIHUHQFH[1] Sugiyama, M., Uemura, T., Kondo, M. et al. An ultraflexible organic differential amplifier forrecording electrocardiograms. Nat Electron 2, 351–360 (2019). https://doi.org/10.1038/s41928-0190283-5

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Development of the deep brain imaging device with the FOP probe
Ryusei Yago, Makito Haruta
Department of Opto-Electronic System Engineering,
Institute of Science and Technology, Chitose 066-8655, Japanm-haruta@photon.chitose.ac.jp
Neuroscience studies have used optical methods to understand neural activities andelucidate the complex information-processing function of the interlaminar network of
the cortex. Previous research developed a deep brain measurement method using a
miniaturized fluorescence microscope and a prism probe [1]. The method observed
neural activities in the depth direction but could not get a sufficient field of view toobserve one to six layers of the cortex.
Our research has developed a deep brain imaging device that uses a Fiber Optic Plate(FOP) to observe six layers of the cortex. Using the FOP probe instead of a prism probe
gives the device a wide field of view in the depth direction. The FOP probe can transmit
clear optical images to a CMOS image sensor with a small and less invasive structure
because the tip angle can be changed freely, as shown in Fig. 1.

Figure 1: The deep brain imaging device with the FOP probe

Reference[1] Gulati, S., Cao, V. Y., Otte, S. Multi-layer Cortical Ca2+ Imaging in Freely Moving Mice with
Prism Probes and Miniaturized Fluorescence Microscopy., June 13, 2017.

Acknowledgment
This work was supported by JSPS KAKENHI Grant No. JP 23K06786.

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Development of microchannels to integratewith a semiconductor sensor for Aquaponics
Airi Fukuhara, Ryusuke Sakuma, Iria Ito, Makito Haruta
Department of Opto-Electronic System Engineering Institute of Science andTechnology, Chitose 066-8655, Japane-mail: m-haruta@photon.chitose.ac.jp
Aquaponics is a recirculating growth system that uses water from a freshwater fishtank for hydroponics (Fig. 1a). Toxic ammonia from fish waste is decomposed by
microorganisms into nitrite ions, which plants then absorb. The plants act as a filtration
system, enabling the efficient growth of both plants and fish. However, few newcomers
to the aquaponics industry have entered the market because the method requires
specialized knowledge, experience, and equipment in agriculture and aquaculture. We
propose an IoT-based aquaponics system using semiconductor sensors. The
concentration of nitrite (NO₂⁻) in the water indicates the level of pollution. Based on thedata acquired from the sensors, an environment optimized for plant and fish growth willbe established. In this study, we developed microchannels to integrate with asemiconductor sensor for measuring NO₂⁻ concentrations in the fish tank. We areconsidering a CMOS image sensor capable of optical detection and an ion detection
sensor [1], as semiconductor sensors. We successfully established a hydroponic
environment (Fig.1b) and developed methods for fabricating microchannels (Fig. 1c).

Figure 1

IoT-based aquaponics system using semiconductor sensors

Reference[1] T. Hattori, F. Dasai, H. Sato, R. Kato, K.Sawada, Sensors 2019, Vol. 19, April 2019.

Acknowledgment
This work was supported by THE AKIYAMA LIFE SCIENCE FOUNDATION.