Shinji Ando

Novel thiazole oligomers and thiazole/thiophene co-oligomers with trifluoromethylphenyl groups were developed as n-type semiconductors for OFETs. They showed excellent n-type performances with high electron mobilities. A 5,5'-bithiazole with trifluoromethylphenyl groups forms a closely packed two-dimensional columnar structure leading to a high performance n-type FET. The electron mobility was enhanced to 1.83 cm2/Vs on the OTS-treated substrate.

Novel pi-electron systems with trifluoromethylphenyl groups and/or a thiazolothiazole unit were developed as n-type semiconductors for OFETs. They showed excellent n-type performances with high electron mobilities. The trifluoromethylphenyl group was found to be very effective in inducing n-type behavior. The thiazolothiazole unit was favorable for forming stacking structures leading to efficient intermolecular pi-pi interactions.

Novel anthracene derivatives were prepared as semiconductors for FETs to prove the effect of terminal groups on charge transport. The n- and p-type activities were achieved by introduction of acceptor or donor units into the anthracene structure.

Changes in synaptic density in various brain regions were assessed among different age groups of rats maintained in ordinary small cages, as determined by synaptophysin assay. The synaptophysin content in hippocampus decreases as early as in the adult stage. The most remarkable decrement occurs in occipital cortex. In other regions, synaptophysin contents decrease in senescence to 60-77% of the respective peak values during young and adult stages. The other rat group reared under enriched enviro

The relationships between the structure and the dielectric properties of polyimides (PIs) were extensively studied to construct universal correlations of dielectric constant (Dk) and dissipation factor (Df) on the structural parameters. In this study, 36 kinds of PIs with a plethora of functional groups including ether, fluorine, amide, ester, ketone, sulfide, sulfone, and alkane groups were prepared by polyaddition and thermal imidization. Accordingly, their thermal, mechanical, and dielectric

An endoglucanase homolog from the hyperthermophilic archaeon Pyrococcus horikoshii was expressed in Escherichia coli, and its enzymatic characteristics were examined. The expressed protein was a hyperthermostable endoglucanase which hydrolyzes celluloses, including Avicel and carboxymethyl cellulose, as well as beta-glucose oligomers. This enzyme is the first endoglucanase belonging to glycosidase family 5 found from Pyrococcus species and is also the first hyperthermostable endoglucanase to whi

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntermolecular hydrogen-bonding effect on carbon-13 NMR chemical shifts of glycine residue carbonyl carbons of peptides in the solid stateShinji. Ando, Isao. Ando, Akira. Shoji, and Takuo. OzakiCite this: J. Am. Chem. Soc. 1988, 110, 11, 3380–3386Publication Date (Print):May 1, 1988Publication History Published online1 May 2002Published inissue 1 May 1988https://pubs.acs.org/doi/10.1021/ja00219a006https://doi.org/10.1021/ja00219a006research-articleACS

Numerical synaptic density and synaptic vesicle density in rat frontal cortex were examined by electron microscopy as a function of age. The density of axospinous synapses, a major population of synapses, was found to peak at age 1 month, and to gradually decrease with aging. The synaptic vesicle density in axospinous synapses was shown to rapidly increase to a peak during the first 3 weeks and then decrease to the adult level, which remained unchanged in senescence. The time course of synaptic

ADVERTISEMENT RETURN TO ISSUEPREVArticlePerfluorinated polyimide synthesisShinji Ando, Tohru Matsuura, and Shigekuni SasakiCite this: Macromolecules 1992, 25, 21, 5858–5860Publication Date (Print):October 1, 1992Publication History Published online1 May 2002Published inissue 1 October 1992https://pubs.acs.org/doi/10.1021/ma00047a045https://doi.org/10.1021/ma00047a045research-articleACS PublicationsRequest reuse permissionsArticle Views1229Altmetric-Citations99LEARN ABOUT THESE METRICSArticle Vie

A rat dementia model with cognitive deficits was generated by synapse-specific lesions using botulinum neurotoxin (BoNTx) type B in the entorhinal cortex. To detect cognitive deficits, different tasks were needed depending upon the age of the model animals. Impaired learning and memory with lesions were observed in adult rats using the Hebb-Williams maze, AKON-1 maze and a continuous alternation task in T-maze. Cognitive deficits in lesioned aged rats were detected by a continuous alternation an

Magnesium-lithium single crystals were stretched in the [11\bar20] direction to investigate the deformation behavior by non-basal slip. {11\bar22}〈\bar1\bar123〉 second order pyramidal slip is activated in magnesium −3.5 at%, −7.5 at% and −10.6 at% lithium alloy single crystals, and its yield stress shows anomalous temperature dependence in the range from 77 K to 293 K . The yield stress due to the pyramidal slip decreases with addition of lithium. The deformation mode due to the pyramidal slip i