bluuebunny/crossref_metadata_2025 huggingface dataset:
Observation of terahertz-radiation-induced ionization in a single nano island
Authors: Seo Minah , Kang Ji-Hun , Kim Hyo-Suk , Hyong Cho Joon , Choi Jaebin , Min Jhon Young , Lee Seok , Hun Kim Jae , Lee Taikjin , Park Q-Han , Kim Chulki
Published: May 2015

Terahertz (THz) electromagnetic wave has been widely used as a spectroscopic probe to detect the collective vibrational mode in vast molecular systems and investigate dielectric properties of various materials. Recent technological advances in generating intense THz radiation and the emergence of THz plasmonics operating with nanoscale structures have opened up new pathways toward THz applications. Here, we present a new opportunity in engineering the state of matter at the atomic scale using THz wave and a metallic nanostructure. We show that a medium strength THz radiation of 22 kV/cm can induce ionization of ambient carbon atoms through interaction with a metallic nanostructure. The prepared structure, made of a nano slot antenna and a nano island located at the center, acts as a nanogap capacitor and enhances the local electric field by two orders of magnitudes thereby causing the ionization of ambient carbon atoms. Ionization and accumulation of carbon atoms are also observed through the change of the resonant condition of the nano slot antenna and the shift of the characteristic mode in the spectrum of the transmitted THz waves.
Screening of aptamers specific to colorectal cancer cells and stem cells by utilizing On-chip Cell-SELEX
Authors: Hung Lien-Yu , Wang Chih-Hung , Che Yu-Jui , Fu Chien-Yu , Chang Hwan-You , Wang Kuan , Lee Gwo-Bin
Published: May 2015

Colorectal cancer (CRC) is the most frequently diagnosed cancer around the world, causing about 700,000 deaths every year. It is clear now that a small fraction of CRC, named colorectal cancer stem cells (CSCs) exhibiting self-renewal and extensive proliferative activities, are hard to be eradicated. Unfortunately, highly specific biomarkers for colorectal CSC (CR-CSCs) are lacking that prohibits the development of effective therapeutic strategies. This study designed and manufactured a novel microfluidic system capable of performing a fully automated cell-based, systematic evolution of ligands by exponential enrichment (SELEX) process. Eight CR-CSC/CRC-specific aptamers were successfully selected using the microfluidic chip. Three of the aptamers showed high affinities towards their respective target cells with a dissociation constant of 27.4, 28.5 and 12.3 nM, which are comparable to that of antibodies.
Expedited CO2 respiration in people with Miltenberger erythrocyte phenotype GP.Mur
Authors: Hsu Kate , Kuo Mei-Shin , Yao Ching-Che , Lee Ting-Ying , Chen Yi-Chun , Cheng Han-Chih , Lin Chia-Hao , Yu Tzung-Han , Lin Hui-Ju
Published: May 2015

In Southeast Asia, Miltenberger antigen subtype III (Mi.III; GP.Mur) is considered one of the most important red blood cell antigens in the field of transfusion medicine. Mi.III functions to promote erythrocyte band 3 expression and band 3-related HCO3− transport, with implications in blood CO2 metabolism. Could Mi.III affect physiologic CO2 respiration in its carriers? Here, we conducted a human trial to study the impacts of Mi.III expression in respiration. We recruited 188 healthy, adult subjects for blood typing, band 3 measurements and respiratory tests before and after exercise. The 3-minute step exercise test forced the demand for CO2 dissipation to rise. We found that immediately following exercise, Mi.III + subjects exhaled CO2 at greater rates than Miltenberger-negative subjects. Respiration rates were also higher for Mi.III + subjects immediately after exercise. Blood gas tests further revealed distinct blood CO2 responses post-exercise between Mi.III and non-Mi.III. In contrast, from measurements of heart rates, blood O2 saturation and lactate, Mi.III phenotype was found to be independent of one’s aerobic and anaerobic capacities. Thus, Mi.III expression supported physiologic CO2 respiration. Conceivably, Mi.III + people may have advantages in performing physically enduring activities.
Interaction-induced singular Fermi surface in a high-temperature oxypnictide superconductor
Authors: Charnukha A. , Thirupathaiah S. , Zabolotnyy V. B. , Büchner B. , Zhigadlo N. D. , Batlogg B. , Yaresko A. N. , Borisenko S. V.
Published: May 2015

In the family of iron-based superconductors, LaFeAsO-type materials possess the simplest electronic structure due to their pronounced two-dimensionality. And yet they host superconductivity with the highest transition temperature Tc ≈ 55K. Early theoretical predictions of their electronic structure revealed multiple large circular portions of the Fermi surface with a very good geometrical overlap (nesting), believed to enhance the pairing interaction and thus superconductivity. The prevalence of such large circular features in the Fermi surface has since been associated with many other iron-based compounds and has grown to be generally accepted in the field. In this work we show that a prototypical compound of the 1111-type, SmFe0.92Co0.08AsO , is at odds with this description and possesses a distinctly different Fermi surface, which consists of two singular constructs formed by the edges of several bands, pulled to the Fermi level from the depths of the theoretically predicted band structure by strong electronic interactions. Such singularities dramatically affect the low-energy electronic properties of the material, including superconductivity. We further argue that occurrence of these singularities correlates with the maximum superconducting transition temperature attainable in each material class over the entire family of iron-based superconductors.
Increased gastrointestinal blood flow: An essential circulatory modification for euryhaline rainbow trout (Oncorhynchus mykiss) migrating to sea
Authors: Brijs Jeroen , Axelsson Michael , Gräns Albin , Pichaud Nicolas , Olsson Catharina , Sandblom Erik
Published: May 2015

The large-scale migrations of anadromous fish species from freshwater to seawater have long been considered particularly enigmatic, as this life history necessitates potentially energetically costly changes in behaviour and physiology. A significant knowledge gap concerns the integral role of cardiovascular responses, which directly link many of the well-documented adaptations (i.e.through oxygen delivery, water and ion transport) allowing fish to maintain osmotic homeostasis in the sea. Using long-term recordings of cardiorespiratory variables and a novel method for examining drinking dynamics, we show that euryhaline rainbow trout (Oncorhynchus mykiss) initiate drinking long before the surrounding environment reaches full seawater salinity (30–33 ppt), suggesting the presence of an external osmo-sensing mechanism. Onset of drinking was followed by a delayed, yet substantial increase in gastrointestinal blood flow through increased pulse volume exclusively, as heart rate remained unchanged. While seawater entry did not affect whole animal energy expenditure, enhanced gastrointestinal perfusion represents a mechanism crucial for ion and water absorption, as well as possibly increasing local gastrointestinal oxygen supply. Collectively, these modifications are essential for anadromous fish to maintain homeostasis at sea, whilst conserving cardiac and metabolic scope for activities directly contributing to fitness and reproductive success.
Impact of hot events at different developmental stages of a moth: the closer to adult stage, the less reproductive output
Authors: Zhang Wei , Chang Xiang-Qian , Hoffmann AryA. , Zhang Shu , Ma Chun-Sen
Published: May 2015

Hot days in summer (involving a few hours at particularly high temperatures) are expected to become more common under climate change. How such events at different life stages affect survival and reproduction remains unclear in most organisms. Here, we investigated how an exposure to 40 °C at different life stages in the global insect pest, Plutella xylostella, affects immediate survival, subsequent survival and reproductive output. First-instar larvae showed the lowest survival under heat stress, whereas 3rd-instar larvae were relatively heat resistant. Heat exposure at the 1st-instar or egg stage did not influence subsequent maturation success, while exposure at the 3rd-instar larval stage did have an effect. We found that heat stress at developmental stages closer to adult stage caused greater detrimental effects on reproduction than heat stress experienced at earlier life stages. The effects of hot events on insect populations can therefore depend critically on the timing of the event relative to an organism’s life-cycle.
High rate and durable, binder free anode based on silicon loaded MoO3 nanoplatelets
Authors: Martinez-Garcia Alejandro , Thapa Arjun Kumar , Dharmadasa Ruvini , Nguyen Tu Q. , Jasinski Jacek , Druffel Theodore L. , Sunkara Mahendra K
Published: May 2015

In order to make fast-charging batteries a reality for electric vehicles, durable, more energy dense and high-current density resistant anodes need to be developed. With such purpose, a low lithiation potential of 0.2 V vs. Li/Li+ for MoO3 nanoplatelet arrays is reported here for anodes in a lithium ion battery. The composite material here presented affords elevated charge capacity while at the same time withstands rapid cycling for longer periods of time. Li2MoO4 and Li1.333Mo0.666O2 were identified as the products of lithiation of pristine MoO3 nanoplatelets and silicon-decorated MoO3, respectively, accounting for lower than previously reported lithiation potentials. MoO3 nanoplatelet arrays were deposited using hot-wire chemical vapor deposition. Due to excellent voltage compatibility, composite lithium ion battery anodes comprising molybdenum oxide nanoplatelets decorated with silicon nanoparticles (0.3% by wt.) were prepared using an ultrasonic spray. Silicon decorated MoO3 nanoplatelets exhibited enhanced capacity of 1037 mAh g−1 with exceptional cyclablity when charged/discharged at high current densities of 10 A g−1.
Chemical Biotechnology for Plant Protection
Authors: Zhao Zhenjiang , Xu Yufang , Qian Xuhong
Published: May 2015

Excessive use of traditional agrichemicals in crop protection has caused serious problems to our environment. Genetically modified (GM) crops from biotechnology can reduce the use of such chemicals and are attractive, but they have not gained widespread approval due to some ethical concerns. Plant activators are one kind of chemical biotechnology that offers a unique solution to this problem, in which crop protection is realized by initiating the plant's systemic acquired resistance (SAR) against a broad spectrum of diseases and pest invasions by adjusting some cascades or making some biological changes, including metabolism, or pathogen-related (PR) protein expressions. Ideally, a plant activator or its metabolites should display no antimicrobial activity in vitro and should be green plant protecting products. In this chapter, we give a brief introduction of the history, action mechanisms, current state of the art and an overview of future developments in chemical biology for plant protection.
Rapid detection of Fusarium wilt in basil (Ocimum sp.) leaves by desorption electrospray ionization mass spectrometry (DESI MS) imaging
Authors: Hemalatha R. G. , Naik Hemanta R. , Mariappa Vasundhara , Pradeep T.
Published: May 2015

A rapid method to unravel the spatial distribution ofFusarium/other pathogen-contamination in asymptomatic leaves under ambient conditions.
Specific G-quadruplex structure recognition of human telomeric RNA over DNA by a fluorescently activated hyperporphyrin
Authors: Wang Ying , Hu Yuehua , Wu Tao , Liu Hua , Zhang Lihua , Zhou Xiaoshun , Shao Yong
Published: May 2015

Selective recognition of the G-quadruplex structure of human telomeric RNA (TERRA) over DNA was achieved using an activated hyperporphyrin as a fluorescent probe.
Electrochemical behaviors and simultaneous determination of guanine and adenine based on highly ordered Pd-nanowire arrays-modified glassy carbon electrode
Authors: Zhang Min , Gan Feng , Cheng Faliang
Published: May 2015

A novel electrochemical sensor based on a Pd nanowire arrays (Pd NWAs) electrode for the simultaneous detection of guanine (G) and adenine (A).
Immobilization of a novel synthesized Schiff base on the surface of a gold electrode for the electrochemical study of adrenaline
Authors: Honarmand Ebrahim , Motaghedifard Mohammad Hassan
Published: May 2015

A self-assembled monolayer of 2-[({2-[(2-{[(Z)-1-(2-hydroxy phenyl) methylidene] amino} phenyl) disulfanyl] phenyl} imino) methyl] phenol was fabricated on a bare gold electrode (SITP-Au SAM electrode).
Novel use of PVPP in a modified QuEChERS extraction method for UPLC-MS/MS analysis of neonicotinoid insecticides in tea matrices
Authors: Hou Ruyan , Jiao Weiting , Xiao Yu , Guo Jiagang , LV Yaning , Tan Huarong , Hu Jingwei , Wan Xiaochun
Published: May 2015

A rapid UPLC-ESI (+)-MS/MS method was developed and validated for simultaneous determination of eight neonicotinoid insecticides (dinotefuran, nitenpyram, thiamethoxam, clothianidin, imidacloprid, acetamiprid, thiacloprid and imidaclothiz) in tea samples.
Metabolic remodeling of bacterial surfaces via tetrazine ligations
Authors: Pidgeon S. E. , Pires M. M.
Published: May 2015

Bioorthogonal click ligations are extensively used for the introduction of functional groups in biological systems.
Ruthenium bipyridyl tethered porous organosilica: a versatile, durable and reusable heterogeneous photocatalyst
Authors: Jana Avijit , Mondal John , Borah Parijat , Mondal Sujan , Bhaumik Asim , Zhao Yanli
Published: May 2015

Ruthenium bipyridyl tethered mesoporous organosilica (Ru-POS) was developed as a versatile heterogeneous photoredox catalyst in several organic transformations.
Improving mediated electron transport in anodic bioelectrocatalysis
Authors: Tao Le , Wang Haibo , Xie Mingshi , Thia Larissa , Chen Wei Ning , Wang Xin
Published: May 2015

A microbial fuel cell loaded with bio-cocatalyst beads immobilized with recombinant riboflavin-secreting Escherichia coli shows significantly enhanced performance.
Ruthenium-catalyzed decarbonylative addition reaction of anhydrides with alkynes: a facile synthesis of isocoumarins and α-pyrones
Authors: Prakash Rashmi , Shekarrao Kommuri , Gogoi Sanjib , Boruah Romesh C.
Published: May 2015

The first example of a ruthenium catalyzed decarbonylative addition reaction of anhydrides with disubstituted alkynes is reported.
Supramolecular hydrophobic guest transport system based on pillar[5]arene
Authors: Qi Zhenhui , Achazi Katharina , Haag Rainer , Dong Shengyi , Schalley Christoph A.
Published: May 2015

A pillar[5]arene-based bioactive guest loading system was developed, which increased the solubility of norharmane in aqueous medium.
Behaviour of NBD-head group labelled phosphatidylethanolamines in POPC bilayers: a molecular dynamics study
Authors: Filipe Hugo A. L. , Santos Lennon S. , Prates Ramalho J. P. , Moreno Maria João , Loura Luís M. S.
Published: May 2015

An NBD-diC16PE/POPC bilayer with typical fluorophore inverted-snorkelling configurations, and mass density profiles across the membrane. The wide distribution of the NBD fluorophore lies at the origin of its complex emission kinetics.
Two-dimensional silicon monolayers generated on c-BN(111) substrate
Authors: Wu Haiping , Qian Yan , Lu Shaohua , Kan Erjun , Lu Ruifeng , Deng Kaiming , Wang Hui , Ma Yanming
Published: May 2015

Three Si monolayer structures, a Si chain-type structure, a two-dimensional hexagonal close packed compound structure, and a two-dimensional hexagonal close packed structure, are generated on a c-BN(111) substrate.
An accurate benchmark description of the interactions between carbon dioxide and polyheterocyclic aromatic compounds containing nitrogen
Authors: Li Sicheng , Smith Daniel G. A. , Patkowski Konrad
Published: May 2015

We assessed the performance of a large variety of modern density functional theory approaches for the adsorption of carbon dioxide on molecular models of pyridinic N-doped graphene.
Developments and recent advancements in the field of endogenous amino acid selective bond forming reactions for bioconjugation
Authors: Koniev Oleksandr , Wagner Alain
Published: May 2015

Recent advances in bond-forming bioconjugation reactions of native amino acid residues with emphasis on the most practically relevant methodologies.
The importance of second shell effects in the simulation of hydrated Sr2+hydroxide complexes
Authors: Makkos Eszter , Kerridge Andrew , Kaltsoyannis Nikolas
Published: May 2015

Quantum chemical investigation of the aqueous solvation of strontium hydroxides reveals that the inclusion of an explicit second shell of water molecules is essential to accurately model such systems.
How to get the desired reduction voltage in a single framework! Metallacarborane as an optimal probe for sequential voltage tuning
Authors: Tarrés Màrius , Arderiu Víctor S. , Zaulet Adnana , Viñas Clara , Fabrizi de Biani Fabrizia , Teixidor Francesc
Published: May 2015

A single platform, [M(C2B9H11)2]−(M = Co, Fe) offers the possibility to choose the desired potential in a 1.4 V range without changing shape or volume of the platform. Methyl viologen was used as benchmark forE1/2tuning.
Exciton diffusion in organic semiconductors
Authors: Mikhnenko Oleksandr V. , Blom Paul W. M. , Nguyen Thuc-Quyen
Published: May 2015

Experiments and basic Physics of exciton diffusion in organic semiconductors are reviewed.
Lactobacillus paracasei subsp. paracasei M5L induces cell cycle arrest and calreticulin translocation via the generation of reactive oxygen species in HT-29 cell apoptosis
Authors: Hu Panpan , Song Wei , Shan Yujuan , Du Ming , Huang Minghui , Song Chen , Zhang Lanwei
Published: May 2015

L. paracaseiM5L induces cell cycle arrest and calreticulin translocationviathe generation of ROS in HT-29 cell apoptosis.
Lean rats gained more body weight from a high-fructooligosaccharide diet
Authors: Li Shaoting , Yingyi Gu , Chen Long , Lijuan Gao , Ou Shiyi , Peng Xichun
Published: May 2015

Lean rats gained more body weight from a high-FOS diet and increased more gut Bacteroidetes.
Multiscale analysis of the murine intestine for modeling human diseases
Authors: Lyons Jesse , Herring Charles A. , Banerjee Amrita , Simmons Alan J. , Lau Ken S.
Published: May 2015

When functioning properly, the intestine is one of the key interfaces between the human body and its environment.
Development of an isolation procedure and MC-ICP-MS measurement protocol for the study of stable isotope ratio variations of nickel
Authors: Chernonozhkin Stepan M. , Goderis Steven , Lobo Lara , Claeys Philippe , Vanhaecke Frank
Published: May 2015

A method for high-precision analysis of mass-dependent natural variations in Ni isotope ratios, suitable for applications in the planetary sciences, has been developed and evaluated.
Tear-off patterning: a simple method for patterning nitrocellulose membranes to improve the performance of point-of-care diagnostic biosensors
Authors: Song Mun-Bum , Joung Hyou-Arm , Oh Young Kyoung , Jung Kwonyoung , Ahn Young Deok , Kim Min-Gon
Published: May 2015

This article describes a new method, referred to as “tear-off patterning,” for patterning nitrocellulose (NC) membranes in order to fabricate NC-based point-of-care (POC) diagnostic devices.
One-pot vinylogous aldol addition of β,γ-unsaturated esters under mild conditions
Authors: Akçok İsmail , Çağır Ali
Published: May 2015

A new methodology for the addition of β,γ-unsaturated esters to aldehydes was developed in a TMSCl, Ag2CO3, and TBAF mixture.
Nanostructured p-type CZTS thin films prepared by a facile solution process for 3D p–n junction solar cells
Authors: Park Si-Nae , Sung Shi-Joon , Sim Jun-Hyoung , Yang Kee-Jeong , Hwang Dae-Kue , Kim JunHo , Kim Gee Yeong , Jo William , Kim Dae-Hwan , Kang Jin-Kyu
Published: May 2015

Nanoporous p-type semiconductor CZTS thin films prepared by solution-based process were used for the facile fabrication of 3D p–n junction solar cells between p-type CZTS and n-type CdS.
Cyanine fluorophores for cellular protection against ROS in stimulated macrophages and two-photon ROS detection
Authors: Chan M. S. , Xu D. , Guo L. , Tam D. Y. , Liu L. S. , Chen Y. , Wong M. S. , Lo P. K.
Published: May 2015

A novel biocompatible and macrophage cell-membrane permeable carbazole-based cyanine probe for ROS detection and cellular protection is reported.
Intra-chain radical chemistry as a route to poly(norbornene imide) single-chain nanoparticles: structural considerations and the role of adventitious oxygen
Authors: Cole Justin P. , Lessard Jacob J. , Lyon Christopher K. , Tuten Bryan T. , Berda Erik B.
Published: May 2015

The intra-chain radical polymerization of pendant methacryloyl decorated poly(norbornene) imides is a viable route to single-chain nanoparticles, however this process is complicated by adventitious molecular oxygen.
Pyridine-bridged diketopyrrolopyrrole conjugated polymers for field-effect transistors and polymer solar cells
Authors: Zhang Xiaotao , Xiao Chengyi , Zhang Andong , Yang Fangxu , Dong Huanli , Wang Zhaohui , Zhan Xiaowei , Li Weiwei , Hu Wenping
Published: May 2015

Five different pyridine-bridged diketopyrrolopyrrole-based polymers with variable energy levels were applied in organic field-effect transistors and polymer solar cells.
Direct transformation of amides: a one-pot reductive Ugi-type three-component reaction of secondary amides
Authors: Zheng Jian-Feng , Qian Xiang-Yang , Huang Pei-Qiang
Published: May 2015

An efficient reductive Ugi-type reaction employing common secondary amides as starting materials has been established. The reaction exhibited a broad substrate scope, good chemoselectivity and functional group tolerance.
Tribochemistry of phosphorus additives: experiments and first-principles calculations
Authors: De Barros-Bouchet M. I. , Righi M. C. , Philippon D. , Mambingo-Doumbe S. , Le-Mogne T. , Martin J. M. , Bouffet A.
Published: May 2015

The work of separation and shear strength of iron dramatically decrease by increasing the phosphorus concentration at the interface.
Synthesis of novel aryl dithian valeryl podophyllotoxin ester derivatives as potential antitubulin agents
Authors: Lin Hong-Yan , Li Zi-Kang , Han Hong-Wei , Qiu Han-Yue , Gu Hong-Wei , Yang Yong-Hua , Wang Xiao-Ming
Published: May 2015

L4 can cause A549 cell cycle arrest in the G2/M phase potently by disrupting tubulin polymerization.
Tropospheric chemical degradation of vinyl and allyl acetate initiated by Cl atoms under high and low NOxconditions
Authors: Blanco María B. , Bejan Iustinian , Barnes Ian , Wiesen Peter , Teruel Mariano A.
Published: May 2015

The products of the reactions of Cl atoms with vinyl acetate (VA) and allyl acetate (AA) have been investigated with and without NOxin a 1080 L chamber usingin situFTIR.
Designing temperature-memory effects in semicrystalline polyurethane
Authors: Mirtschin Nikolaus , Pretsch Thorsten
Published: May 2015

Facile ways to design temperature-memory effects in semicrystalline polyurethane by thermomechanical programming are reported.
Synergistic effects of hierarchical hybrid micro/nanostructures on the biological properties of titanium orthopaedic implants
Authors: Li B. E. , Li Y. , Min Y. , Hao J. Z. , Liang C. Y. , Li H. P. , Wang G. C. , Liu S. M. , Wang H. S.
Published: May 2015

Hybrid micro/nanotopographic features are of crucial importance to the activity of osteoblasts.
Detecting the hollow structure of thick carbon nanotubes by scanning transmission X-ray microscopy
Authors: Zhao Guanqi , Wang Jian , Sun Xuhui , Zhong Jun
Published: May 2015

Different hollow structures of individual thick carbon nanotubes have been probed by scanning transmission X-ray microscopy and transmission electron microscopy.
Facile synthesis of highly thermally stable nanoporous γ-aluminas from aluminum alkoxide precursors
Authors: Mohammadnezhad Gholamhossein , Akintola Oluseun , Plass Winfried , Schacher Felix H. , Steiniger Frank , Westermann Martin
Published: May 2015

The effects of aluminum alkoxide single source precursors on the sol–gel synthesis of highly thermally stable nanostructured alumina by nonionic triblock copolymer P123 were investigated.
Graphene nanosheet reinforced ZrB2–SiC ceramic composite by thermal reduction of graphene oxide
Authors: Zhang Xinghong , An Yumin , Han Jiecai , Han Wenbo , Zhao Guangdong , Jin Xinxin
Published: May 2015

A graphene nanosheets reinforced ZrB2–SiC ceramic composite was achieved by in situ thermal reduction of graphene oxide during hot pressing process.
Assembly of Zn-metal organic frameworks based on a N-rich ligand: selective sorption for CO2 and luminescence sensing of nitro explosives
Authors: Hu Xiao-Li , Qin Chao , Zhao Liang , Liu Fu-Hong , Shao Kui-Zhan , Su Zhong-Min
Published: May 2015

Two novel Zn(ii)-MOF have been successfully obtained. 1 exhibits a 3D framework with square channels and 2 shows a bi-pillared-layer type 3D framework. Furthermore, 1 exhibits selective CO2/N2 adsorption capacity and luminescence quenched toward acetone and nitrobenzene.
Sodium aluminate from waste aluminium source as catalyst for the transesterification of Jatropha oil
Authors: Cherikkallinmel Sudha Kochiyil , Gopalakrishnan Anila , Yaakob Zahira , Ramakrishnan Resmi M. , Sugunan Sankaran , Narayanan Binitha N.
Published: May 2015

Transesterification of Jatropha oil with methanol is carried over heterogeneous sodium aluminate catalyst to produce biodiesel.
Characterization and structure–property relationship of melt-mixed high density polyethylene/multi-walled carbon nanotube composites under extensional deformation
Authors: Xiang Dong , Harkin-Jones Eileen , Linton David
Published: May 2015

Disentanglement degree of nanotube agglomerates depends on the stretching mode, strain rate and stretching temperatures under extensional deformation.
Controlled synthesis of functional Ag, Ag–Au/Au–Ag nanoparticles and their Prussian blue nanocomposites for bioanalytical applications
Authors: Pandey Prem. C. , Singh Richa , Pandey Yashashwa
Published: May 2015

A facile method for the synthesis of functional AgNPs and bimetallic Ag–Au/Au–Ag are reported, enabling the formation of nanocomposite with prussian blue in a crystalline framework for bioanalytical applications, showing the active role of organic reducing agents and 3-aminopropyltrimethoxysilane.
A novel surfactant silica gel modified carbon paste electrode in micellar media for selective determination of diminazene aceturate in the presence of its stabilizer
Authors: Zaazaa Hala E. , Salama Nahla N. , Azab Shereen M. , Atty Shimaa A. , El-Kosy Naglaa M. , Salem Maissa Y.
Published: May 2015

A novel irreversible anodic voltammetric method was introduced for selective determination of diminazene aceturate in the presence of phenazone as a stabilizer.
Vacancy mediated ionic conduction in Dy substituted nanoceria: a structure–property correlation study
Authors: Anirban Sk. , Paul Tanmoy , Dutta Abhigyan
Published: May 2015

Origin of vacancies in ceria due to doping.
Bioavailability, plasma protein binding and metabolic stability studies of a ALDH2 activator, alda-1, using a validated LC-ESI-MS/MS method in rat plasma
Authors: Taneja Isha , Raju Kanumuri Siva Rama , Mittal Monika , Dev Kapil , Khan Mohammad Faheem , Maurya Rakesh , Wahajuddin Muhammad
Published: May 2015

Alda-1 was found to be a poorly bioavailable, 82–86% protein bound, high extraction compound.
Silicon-containing poly(esters) with halogenated bulky side groups. Synthesis, characterization and thermal studies
Authors: Tagle L. H. , Terraza C. A. , Tundidor-Camba A. , Coll D.
Published: May 2015

Synthesis of poly(esters) X-PE-(a-c) and poly(esters) X-PE.
A convenient access to β-iodo sulfone by the iodine-mediated iodosulfonylation of alkenes
Authors: Sun Kai , Lv Yunhe , Zhu Zhonghong , Jiang Yongqing , Qi Jiejie , Wu Hankui , Zhang Zhiguo , Zhang Guisheng , Wang Xin
Published: May 2015

A novel iodine-mediated intermolecular iodosulfonylation reaction of alkenes for dual C–S and C–I bond formation was achieved.
4,5-seco-Probotryenols A–C, a new type of sesquiterpenoids from Stachybotrys bisbyi
Authors: Bao Yan-Ru , Chen Guo-Dong , Gao Hao , He Rong-Rong , Wu Yue-Hua , Li Xiao-Xia , Hu Dan , Wang Chuan-Xi , Liu Xing-Zhong , Li Yan , Yao Xin-Sheng
Published: May 2015

4,5-seco-Probotryenols A–C (1–3), a new type of sesquiterpenoids named seco-probotryane-type sesquiterpenoid, have been obtained from Stachybotrys bisbyi, along with five new botryane skeleton sesquiterpenoids (4, 5, and 8–10).
Differentiation and focal adhesion of adipose-derived stem cells on nano-pillars arrays with different spacing
Authors: Kim Hye Sung , Yoo Hyuk Sang
Published: May 2015

A nanopillar array with pillar-to-pillar distances ranging from 3 μm to 10 μm induces neuronal differentiation of ADSCs.
Three dimensions sphere formaldehyde nanosensor applications: preparation and sensing properties
Authors: Wang Ying , Jiang Dingsheng , Wei Wei , Zhu Linghui , Shen Liang , Wen Shanpeng , Ruan Shengping
Published: May 2015

Unique nanoarchitecture of microsphere Zn@SnO2 sensor was prepared via solvothermal method, showing extraordinary sensing properties to formaldehyde.
Main-chain liquid crystalline ionomers with a nonplanar ionic segment
Authors: Ruan Chao , Chen Li , Yang Rong , Zhong Hai-Yi , Wang Yu-Zhong
Published: May 2015

At the presence of the physical crosslinking of ionic groups, tensile properties of the liquid crystalline ionomer were improved greatly.
A dumbbell-like supramolecular triblock copolymer and its self-assembly of light-responsive vesicles
Authors: Zhang Dapeng , Fan Yujiao , Li Huimei , Li Ke , Yao Yuan , Zhou Yongfeng , Yan Deyue
Published: May 2015

The work reports a dumbbell-like supramolecular triblock copolymer and its self-assembly of light-responsive monolayer vesicles.
Investigation of pH-induced conformational change and hydration of poly(methacrylic acid) by analytical ultracentrifugation
Authors: Wang Xiaoyan , Ye Xiaodong , Zhang Guangzhao
Published: May 2015

Analytical ultracentrifugation was performed on poly(methacrylic acid) (PMAA) with a series of weight average molar masses (Mw) in aqueous solutions as a function of pH.
Nitrogen self-doped graphitic carbon nitride as efficient visible light photocatalyst for hydrogen evolution
Authors: Fang Jiawen , Fan Huiqing , Li Mengmeng , Long Changbai
Published: May 2015

Nitrogen self-doped graphitic carbon nitride was successfully synthesized by the co-thermal condensation of the precursor with a nitrogen-rich additive.
Design and synthesis of Ni-MOF/CNT composites and rGO/carbon nitride composites for an asymmetric supercapacitor with high energy and power density
Authors: Wen Ping , Gong Peiwei , Sun Jinfeng , Wang Jinqing , Yang Shengrong
Published: May 2015

Novel composites of Ni-MOF/CNTs and rGO/C3N4were synthesized to assemble an asymmetric supercapacitor with high energy and power density.
Synthesis of LiMnPO4/C with superior performance as Li-ion battery cathodes by a two-stage microwave solvothermal process
Authors: Zhu Jian-Nan , Li Wen-Cui , Cheng Fei , Lu An-Hui
Published: May 2015

We have selectively synthesized LiMnPO4/C with specific crystal facets and superior electrochemical performance by a two-stage microwave solvothermal process.
Revealing the direct effect of individual intercalations on DNA conductance toward single-molecule electrical biodetection
Authors: Wang Xiaolong , Gao Li , Liang Bo , Li Xin , Guo Xuefeng
Published: May 2015

The effect of individual intercalations on DNA conductance is revealed electrically at the single-molecule level by using DNA-functionalized molecular junctions.
Dye-conjugated upconversion nanoparticles for ratiometric imaging of intracellular pH values
Authors: Ma Tingchun , Ma Yun , Liu Shujuan , Zhang Lili , Yang Tianshe , Yang Hui-Ran , Lv Wen , Yu Qi , Xu Wenjuan , Zhao Qiang , Huang Wei
Published: May 2015

An xylenol orange-functionalized upconversion nanoprobe has been developed, which can be used for ratiometric upconversion luminescence bioimaging of intracellular pH changes.
Ba6(Bi1−xEux)9B79O138 (0 ≤ x ≤ 1): synergetic changing of the wavelength of Bi3+ absorption and the red-to-orange emission ratio of Eu3+
Authors: Li Qiaoqi , Cong Rihong , Zhou Xianju , Gao Wenliang , Yang Tao
Published: May 2015

Ba6(Bi1−xEux)9B79O138:xEu3+ shows a simultaneous change in the wavelength shift of Bi3+ absorption and red-to-orange emission ratio by varying x.
JAM-A promotes wound healing by enhancing both homing and secretory activities of mesenchymal stem cells
Authors: Wu Minjuan , Ji Shizhao , Xiao Shichu , Kong Zhengdong , Fang He , Zhang Yunqing , Ji Kaihong , Zheng Yongjun , Liu Houqi , Xia Zhaofan
Published: May 2015

The homing ability and secretory function of mesenchymal stem cells (MSCs) are key factors that influence cell involvement in wound repair. These factors are controlled by multilayer regulatory circuitry, including adhesion molecules, core transcription factors (TFs) and certain other regulators. However, the role of adhesion molecules in this regulatory circuitry and their underlying mechanism remain undefined. In the present paper, we demonstrate that an adhesion molecule, junction adhesion molecule A (JAM-A), may function as a key promoter molecule to regulate skin wound healing by MSCs. In in vivo experiments, we show that JAM-A up-regulation promoted both MSC homing to full-thickness skin wounds and wound healing-related cytokine secretion by MSCs. In vitro experiments also showed that JAM-A promoted MSC proliferation and migration by activating T-cell lymphoma invasion and metastasis 1 (Tiam1). We suggest that JAM-A up-regulation can increase the proliferation, cytokine secretion and wound-homing ability of MSCs, thus accelerating the repair rate of full-thickness skin defects. These results may provide insights into a novel and potentially effective approach to improve the efficacy of MSC treatment.
Scale‐invariant feature matching based on pairs of feature points
Authors: Wang Zhiheng , Wang Zhifei , Liu Hongmin , Huo Zhanqiang
Published: May 2015

On the basis of feature points pairing, a scale‐invariant feature matching method is proposed in this study. The distance between two features is used to compute feature pairs' support region size, which is different from the methods using detectors to provide information to find the support region. Moreover, to achieve rotation invariance, a sub‐region division method based on intensity order is introduced. For comparison to the popular descriptors scale‐invariant feature transform and speeded‐up robust features, the authors also choose the detected points by difference of Gaussian and fast Hessain detectors as feature points to start the authors' method. Additional experiments compare the reported method with similar proposed methods, such as Tell's and Fan's. The experimental results show that the authors' proposed descriptor outperforms the popular descriptors under various image transformations, especially on images with scale and viewpoint transformations.
Ion aggregation in high salt solutions. III. Computational vibrational spectroscopy of HDO in aqueous salt solutions
Authors: Choi Jun-Ho , Kim Heejae , Kim Seongheun , Lim Sohee , Chon Bonghwan , Cho Minhaeng
Published: May 2015

The vibrational frequency, frequency fluctuation dynamics, and transition dipole moment of the O—D stretch mode of HDO molecule in aqueous solutions are strongly dependent on its local electrostatic environment and hydrogen-bond network structure. Therefore, the time-resolved vibrational spectroscopy the O—D stretch mode has been particularly used to investigate specific ion effects on water structure. Despite prolonged efforts to understand the interplay of O—D vibrational dynamics with local water hydrogen-bond network and ion aggregate structures in high salt solutions, still there exists a gap between theory and experiment due to a lack of quantitative model for accurately describing O—D stretch frequency in high salt solutions. To fill this gap, we have performed numerical simulations of Raman scattering and IR absorption spectra of the O—D stretch mode of HDO in highly concentrated NaCl and KSCN solutions and compared them with experimental results. Carrying out extensive quantum chemistry calculations on not only water clusters but also ion-water clusters, we first developed a distributed vibrational solvatochromic charge model for the O—D stretch mode in aqueous salt solutions. Furthermore, the non-Condon effect on the vibrational transition dipole moment of the O—D stretch mode was fully taken into consideration with the charge response kernel that is non-local polarizability density. From the fluctuating O—D stretch mode frequencies and transition dipole vectors obtained from the molecular dynamics simulations, the O—D stretch Raman scattering and IR absorption spectra of HDO in salt solutions could be calculated. The polarization effect on the transition dipole vector of the O—D stretch mode is shown to be important and the asymmetric line shapes of the O—D stretch Raman scattering and IR absorption spectra of HDO especially in highly concentrated NaCl and KSCN solutions are in quantitative agreement with experimental results. We anticipate that this computational approach will be of critical use in interpreting linear and nonlinear vibrational spectroscopies of HDO molecule that is considered as an excellent local probe for monitoring local electrostatic and hydrogen-bonding environment in not just salt but also other confined and crowded solutions.
Mechanical unfolding pathway of a model β-peptide foldamer
Authors: Uribe Lalita , Jaschonek Stefan , Gauss Jürgen , Diezemann Gregor
Published: May 2015

Foldamers constructed from oligomers of β-peptides form stable secondary helix structures already for small chain lengths, which makes them ideal candidates for the investigation of the (un)folding of polypeptides. Here, the results of molecular simulations of the mechanical unfolding of a β-heptapeptide in methanol solvent revealing the detailed unfolding pathway are reported. The unfolding process is shown to proceed via a stable intermediate even for such a small system. This result is arrived at performing non-equilibrium force ramp simulations employing different pulling velocities and also using standard calculations of the potential of mean force, i.e., the free energy as a function of the helix elongation. It is thus demonstrated that even with the rather large pulling velocities employed in the force ramp simulations relevant information about the equilibrium kinetics can be obtained. The smallness of the system allows a detailed analysis of the unfolding pathway, which is characterized by an opening of the terminal loops followed by the unfolding of the center. This sequence is in accord with the configurational preferences of the system that also are responsible for the stability of the 314-helix. From an analysis of the distributions of rupture forces and the force spectra, the kinetic rates for both transitions were determined and common models were used to extract geometric quantities describing the free energy landscape of the system.
Similarity-transformed perturbation theory on top of truncated local coupled cluster solutions: Theory and applications to intermolecular interactions
Authors: Azar Richard Julian , Head-Gordon Martin
Published: May 2015

Your correspondents develop and apply fully nonorthogonal, local-reference perturbation theories describing non-covalent interactions. Our formulations are based on a Löwdin partitioning of the similarity-transformed Hamiltonian into a zeroth-order intramonomer piece (taking local CCSD solutions as its zeroth-order eigenfunction) plus a first-order piece coupling the fragments. If considerations are limited to a single molecule, the proposed intermolecular similarity-transformed perturbation theory represents a frozen-orbital variant of the “(2)”-type theories shown to be competitive with CCSD(T) and of similar cost if all terms are retained. Different restrictions on the zeroth- and first-order amplitudes are explored in the context of large-computation tractability and elucidation of non-local effects in the space of singles and doubles. To accurately approximate CCSD intermolecular interaction energies, a quadratically growing number of variables must be included at zeroth-order.
Instabilities in the asymptotic suction boundary layer over a permeable, compliant wall
Authors: Pluvinage Franck , Kourta Azeddine , Bottaro Alessandro
Published: May 2015

The spatial, linear stability of an incompressible parallel boundary layer flow with uniform suction through the wall is studied for the case of rigid and flexible bounding surfaces. It is demonstrated, first, that the effect of the plate’s permeability is crucial in defining the disturbance boundary conditions at the wall, and that stability limits depend strongly on it. Next, the combined effect of plate’s permeability and compliance on the onset of Tollmien-Schlichting modes is assessed. Finally, the possible insurgence of an absolute instability mode is studied, as function of the Reynolds number, the modulus of elasticity of the plate, and its permeability.
Achieving enhanced and tunable adhesion via composite posts
Authors: Minsky H. K. , Turner K. T.
Published: May 2015

Surfaces with enhanced and tunable adhesion have a variety of applications, including microtransfer printing of semiconductor elements, material handling in manufacturing, and gripping surfaces on climbing robots. Traditionally, schemes to achieve tunable adhesion have relied on fabricating arrays of posts or fibers with complex geometries, such as angled posts terminated by wider caps. Here, we describe an alternative to post structures with complex geometries through the use of composite posts that consist of a stiff core and a compliant shell. Posts consisting of a stiff core and compliant shell have enhanced adhesion under normal loading, and the pull-off can be reduced via the application of shear. The adhesion mechanics of composite posts are demonstrated here through a combination of finite element simulations and experimental measurements on individual millimeter-scale posts.
Hydrogenated indium oxide window layers for high-efficiency Cu(In,Ga)Se2 solar cells
Authors: Jäger Timo , Romanyuk Yaroslav E. , Nishiwaki Shiro , Bissig Benjamin , Pianezzi Fabian , Fuchs Peter , Gretener Christina , Döbeli Max , Tiwari Ayodhya N.
Published: May 2015

High mobility hydrogenated indium oxide is investigated as a transparent contact for thin film Cu(In,Ga)Se2 (CIGS) solar cells. Hydrogen doping of In2O3 thin films is achieved by injection of H2O water vapor or H2 gas during the sputter process. As-deposited amorphous In2O3:H films exhibit a high electron mobility of ∼50 cm2/Vs at room temperature. A bulk hydrogen concentration of ∼4 at. % was measured for both optimized H2O and H2-processed films, although the H2O-derived film exhibits a doping gradient as detected by elastic recoil detection analysis. Amorphous IOH films are implemented as front contacts in CIGS based solar cells, and their performance is compared with the reference ZnO:Al electrodes. The most significant feature of IOH containing devices is an enhanced open circuit voltage (VOC) of ∼20 mV regardless of the doping approach, whereas the short circuit current and fill factor remain the same for the H2O case or slightly decrease for H2. The overall power conversion efficiency is improved from 15.7% to 16.2% by substituting ZnO:Al with IOH (H2O) as front contacts. Finally, stability tests of non-encapsulated solar cells in dry air at 80 °C and constant illumination for 500 h demonstrate a higher stability for IOH-containing devices.
Electronic cooling using thermoelectric devices
Authors: Zebarjadi M.
Published: May 2015

Thermoelectric coolers or Peltier coolers are used to pump heat in the opposite direction of the natural heat flux. These coolers have also been proposed for electronic cooling, wherein the aim is to pump heat in the natural heat flux direction and from hot spots to the colder ambient temperature. In this manuscript, we show that for such applications, one needs to use thermoelectric materials with large thermal conductivity and large power factor, instead of the traditionally used high ZT thermoelectric materials. We further show that with the known thermoelectric materials, the active cooling cannot compete with passive cooling, and one needs to explore a new set of materials to provide a cooling solution better than a regular copper heat sink. We propose a set of materials and directions for exploring possible materials candidates suitable for electronic cooling. Finally, to achieve maximum cooling, we propose to use thermoelectric elements as fins attached to copper blocks.
Effect of droplet interaction on droplet-laden turbulent channel flow
Authors: Kuerten J. G. M. , Vreman A. W.
Published: May 2015

We present results of direct numerical simulation of heat transfer and droplet concentration in turbulent flow of a mixture of dry air, water vapor, and water droplets in a differentially heated channel. In particular, we study the effects of droplet collisions by comparing results of simulations with and without droplet collision model for several overall droplet volume fractions. The results show that droplet collisions have a large influence on droplet concentration. Maximum local concentrations, which occur close to the walls of the channel, are reduced by almost an order of magnitude for the case with the highest overall volume fraction. In addition, the positive skewness of the local volume fraction is reduced by a factor of two near the walls. These findings show the importance of including four-way coupling, even in cases where the overall droplet volume fraction is only on the order of 10−4 and the Stokes number in wall units is only about 10. In spite of this large effect of droplet collisions on droplet concentration, the effect on the overall heat transfer between the walls of the channel is not more than approximately 17%. That the effect on the overall heat transfer is relatively small can be explained by the lower heat exchange area between droplets and gas in the near-wall areas, which results in a higher temperature difference between droplets and surrounding gas.
Mono- and polynucleation, atomistic growth, and crystal phase of III-V nanowires under varying group V flow
Authors: Dubrovskii V. G.
Published: May 2015

We present a refined model for the vapor-liquid-solid growth and crystal structure of Au-catalyzed III-V nanowires, which revisits several assumptions used so far and is capable of describing the transition from mononuclear to polynuclear regime and ultimately to regular atomistic growth. We construct the crystal phase diagrams and calculate the wurtzite percentages, elongation rates, critical sizes, and polynucleation thresholds of Au-catalyzed GaAs nanowires depending on the As flow. We find a non-monotonic dependence of the crystal phase on the group V flow, with the zincblende structure being preferred at low and high group V flows and the wurtzite structure forming at intermediate group V flows. This correlates with most of the available experimental data. Finally, we discuss the atomistic growth picture which yields zincblende crystal structure and should be very advantageous for fabrication of ternary III-V nanowires with well-controlled composition and heterointerfaces.