List of Dissertation Abstract (Environment and Natural Sciences)
NameSupervisor

Title

AbstractHiroyuki

KazuyukiStudies on systemic acquired

Host resistance inducing activity of tolprocarb

HAGIWARAHIRATSUKA

resistance activity of the(TPC) which was known to polyketide synthasefungicide, tolprocarb

inhibitor on melanin biosynthesis (MBI-P) wasunraveled as the second mode of action. The
practicability of TPC was indicated as hostdefence inducer for horticultural crops.

Jae-Young LEE

ShinyaSynthesis and physicochemical

π-conjugated compounds such as organic dyesMATSUMOTO

properties of 2,5-diamino-3,6-

have beenactively studied for application as

dicyanopyrazine dyes with alkyl

highly efficient organiclight emitting materials

substituents on the amino groups

and semiconductor materials. In thisstudy, weinvestigated the molecular structure thatcangenerate liquid state among pyrazine dyes,
and examinedthe influence of the position andlength of the substituenton the melting pointand emission characteristics of themolecule.
Specifically, dyes in which linear alkyl chainsofvarious lengths were introduced the 2,5diamino-3,6-dicyanopyrazine were examined.

YasuhikoTakashi

The reaction mechanism ofOHARAAMEMIYA

noblemetal nanoparticle synthesis synthesizingnanoparticles with low
bypolyphenols and benzendiols

Polyphenols are promising raw materials forenvironmental impact nonetheless,their reaction
mechanisms as reductants have notbeenclarified. In this study, we investigated thereactionmechanism of catechol (CC), a
constituent unit ofpolyphenols, in order toelucidate the reaction mechanism ofnoble metal
nanoparticle synthesis by polyphenols.
Throughthe calculation of the stoichiometricratio by quantitativeanalysis of gold ions, thisstudy demonstrated a newreaction mechanism
for the synthesis of noble metalnanoparticles,
which can contribute to the reduction
ofenvironmental load by optimizing the amountof reductant,improving the yield, and reducing
waste liquid.

Yuta
KOBAYASHI

Akira MORI

Reconsidering Terrestrial

Halting the loss of global biodiversity andBiologicalConservation Towards

protectingecosystem services are urgent andBalancingbetween Biodiversity

challenging tasks facingglobal human society.

andEcosystem Services

This thesis 1) examined ways ofimproving thequality of biodiversity conservation throughthe
reconsideration of conservation framework ofexistingprotected areas and priority areas and 2)
identifies notablecharacteristics of ecosystemservices and discussespractical methods forbalancing the two dimensions ofconservation
relating to biodiversity and ecosystemservices.Based on these findings, I outline someof the implicationsfor future biological studies
and the framing of newbiodiversity targets.

TakumaTomohiko

Taxonomic studies on

Leptostracans are small crustacean with a total

HIRATAKIKUCHI

Leptostracain adjacent waters oflength ofseveral millimeters, which is classified

Japan

into themalacostracan subphylum Crustacea.
This species is animportant species inconsidering the evolutionary history
ofcrustaceans closest to evolutionary
crustaceans due tomorphological characteristics
among primitive crustaceans,but taxonomic
study has not progressing, and even in
Japanexact distribution and diversity have notbeen revealed. Inthis study, we re-evaluated thedistribution and diversity ofleptostracans basedon specimens collected from the watersaround
Japan.