A5019692609- Organic and Molecular Conductors Research
- Magnetism in coordination complexes
- Supramolecular Self-Assembly in Materials
- Nasal Surgery and Airway Studies
- Perovskite Materials and Applications
- Chemical synthesis and alkaloids
- Synthesis and Biological Activity
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Porphyrin and Phthalocyanine Chemistry
- Innovative concrete reinforcement materials
- Polydiacetylene-based materials and applications
- Supramolecular Chemistry and Complexes
- Coastal and Marine Dynamics
- Crystallography and molecular interactions
- Marine Sponges and Natural Products
- Cholinesterase and Neurodegenerative Diseases
- Sperm and Testicular Function
- Concrete Properties and Behavior
- Reproductive Biology and Fertility
- Microbial Natural Products and Biosynthesis
- Sirtuins and Resveratrol in Medicine
- Organometallic Compounds Synthesis and Characterization
- Animal Genetics and Reproduction
- Solid-state spectroscopy and crystallography
- Lipid Membrane Structure and Behavior
Meiji Pharmaceutical University
2013-2025
Japan Aviation Electronics Industry (Japan)
2023
Chiba University
2011-2020
Gunma Prefectural Institute of Public Health and Environmental Sciences
2019
Kyoto University
1998-2015
Nagase ChemteX (Japan)
2015
Kyoto Institute of Technology
2015
Kyoto Architecture University
2015
Tokyo Institute of Technology
2001-2014
The University of Tokyo
2004-2011
To investigate the insulating state of pressure-induced superconductor, beta-(meso-DMBEDT-TTF)2PF6, we have carried out X-ray analysis at 11.5 K. In an asymmetric unit, there exist two crystallographically independent donor molecules, caused by charge separation. column structure, arrangement charge-rich (r) and -poor (p) molecules is as rrpprrpp, which affords "checkerboard"-type ordering.
The response of a thin piezothermoelastic composite plate subjected to stationary thermal and electric fields is investigated. Solutions are based on the classical lamination theory, both direct piezoelectric effect pyroelectric in constitutive relations piezothermoelasticity considered. Numerical results show that these coupled effects have significant influence deflection, middle surface deflection with larger than without them. laminate configuration number layers an
Abstract The electric field structure around the moon is studied using a 2-dimensional electromagnetic full particle simulation. By considering absorption of plasma particles at surface moon, we obtain an intense terminator region where produced by negatively charged lunar and ambipolar wake boundary are in same direction. intensity 2.2 E 0 ( = m υ e ω p / q 0) terminator, corresponding to 3.5 V −1 solar wind. It has large horizontal component due potential difference between charged,...
In vitro evaluation of the physical properties biopolymer-based hydrogels can help in understanding certain phenomena, such as liquid-liquid phase separation. The formation bovine serum albumin (BSA) was investigated pH range 1.0 to 4.0. Hydrogels were formed 3.0 4.0, whereas viscous solutions 1.5 2.5. Unexpectedly, BSA hydrogel observed extremely acidic condition (pH 1.0). circular dichroism spectra recorded at values 1.0, 2.0, 3.0, and 7.0, α-helix contents determined from ellipticity data...
Abstract Despite being a promising soft material embodied by molecular self-assembly, the formation mechanism of supramolecular gels remains challenging to fully understand. Here we provide nanoscopic insights into gel-forming fibers from urea derivative. High-speed atomic force microscopy derivative revealed presence lag phase prior fibers, suggesting nucleation process. The fiber growth kinetics differ at both termini fiber, indicating directional hydrogen-bonding motif units, which is...
The diffusion reaction of TBA2Cu(II)Cl4 (TBA = tetrabutylammonium) and a N-containing organic donor, BP-TTF [=bis(pyrazino)tetrathiafulvalene], yielded 3-D supramolecular Cu complex, [CuCl2(BP-TTF)] (1). magnetic measurement 1 exhibits an antiferromagnetic interaction by fitting Bonner-Fisher model from 2 to 300 K with S 1/2 J -3.5 between Cu(IotaIota) mediated self-assembling donor columns.
A newly synthesized donor meso-DMBEDT-TTF [DMBEDT-TTF = 2-(5,6-dihydro-1,3-dithiolo[4,5-b][1,4]dithiin-2-ylidene)-5,6-dihydro-5,6-dimethyl-1,3-dithiolo[4,5-b][1,4]dithiin] afforded a superconducting salt β-(meso-DMBEDT-TTF)2PF6, with transition temperature at 4.3 K (onset) under hydrostatic pressure of 4.0 kbar.
Aspergillus oryzae has numerous protease genes that might cause proteolytic degradation of heterologously-produced proteins. The productivity the heterologous protein can be improved by gene disruption, but it is difficult to select disruption targets efficiently. In this study, we monitored expression 132 DNA microarray. A group up-regulated during cultivation was identified clustering analysis. group, nptB encoding neutral II included as well alpA, tppA, and pepA genes, which human...
New supramolecular copper complexes with pyrazinotetrathiafulvalene (pyra-TTF) as the ligand, [Cu(II)Cl2(pyra-TTF)] (1) and 2[Cu(I)3Cl4(pyra-TTF)] (2), have been synthesized by diffusion method. Complex 1 is a black block crystal three-dimensional (3-D) network; linear chain [-Cu(II)Cl2-(pyra-TTF)-] n extends along b axis, where coordinated pyra-TTF donors are stacked in head-to-tail ring-over-bond configuration to construct two-dimensional (2-D) sheets, between there C...Cl(-) or H...Cl(-)...
The first asymmetric total synthesis of lycoposerramine-R, a Lycopodium alkaloid possessing novel skeleton, was accomplished by strategy featuring the stereoselective intramolecular aldol cyclization giving cis-fused 5/6 bicyclic skeleton and new method for construction pyridone ring via aza-Wittig reaction.
The solar wind interaction with a non-magnetized, electrically non-conducting body is studied using two-dimensional electromagnetic full particle simulation. magnetic field introduced into the simulation scheme as an initial condition together electric generated by motion of wind. controls direction thermal flow electrons and causes asymmetry negative charging downstream-side surface. potential drop are largest at position where perpendicular to surface non-magnetized body. In absence...
We present spectroscopic evidence for charge ordering in β-( meso -DMBEDT-TTF) 2 PF 6 below ∼70 K. Its infrared and Raman spectra change abruptly at The amplitude of the order was estimated to be 0.5 from splitting infrared-active C=C stretching mode. coexistence both high-temperature low-temperature signals observed a narrow temperature range (∼4 K) near phase transition temperature. pressure diagram obtained vicinity superconducting phase. checkerboard-type charge-order is not directly...
Rational molecular design enables the development of stimuli-responsive supramolecular hydrogels. Biocompatible hydrogels have great potential for medicinal and pharmaceutical applications. In this review, we focus on hydrogels, which show gel-to-sol phase transitions in response to biological-stimuli, biological-stimuli-induced hydrogel formations. biological stimuli, stimuli-induced
Abstract Urea derivatives that were substituted with a 2‐benzylphenyl group and an alkyl functioned as low molecular weight gelators for various organic solvents ionic liquids. long chains effective the gelation of polar solvents. However, they not suitable non‐polar solvents, whereas urea short effective. Ionic liquids similar to in most gelators. The physical properties formed supramolecular gels analyzed by dynamic viscoelasticity measurements using rheometer.