K
Koji Yamada
Researcher at National Institute of Advanced Industrial Science and Technology
Publications - 852
Citations - 23281
Koji Yamada is an academic researcher from National Institute of Advanced Industrial Science and Technology. The author has contributed to research in topics: Silicon photonics & Silicon. The author has an hindex of 71, co-authored 810 publications receiving 21893 citations. Previous affiliations of Koji Yamada include Hokkaido University & Osaka University.
Papers
More filters
Journal ArticleDOI
Extremely Large Group-Velocity Dispersion of Line-Defect Waveguides in Photonic Crystal Slabs
TL;DR: Waveguiding characteristics and group-velocity dispersion of line defects in photonic crystal slabs as a function of defect widths reveal that they can be tuned by controlling the defect width, and the results agree well with theoretical calculations, indicating that light paths with made-to-order dispersion can be designed.
Journal ArticleDOI
K-252 compounds, novel and potent inhibitors of protein kinase C and cyclic nucleotide-dependent protein kinases
Hiroshi Kase,Kazuyuki Iwahashi,Satoshi Nakanishi,Yuzuru Matsuda,Koji Yamada,Mitsuru Takahashi,Chikara C O Patent De Murakata,Akira Sato,Masami Kaneko +8 more
TL;DR: K-252a was a non-selective inhibitor for these three protein kinases with Ki values 18-25 nM, whereas K-252b showed a comparable potency for protein kinase C (Ki, 20nM), whereas inhibitory potencies for cyclic nucleotide-dependentprotein kinases were reduced.
Journal ArticleDOI
Microphotonics devices based on silicon microfabrication technology
Tai Tsuchizawa,Koji Yamada,Hiroshi Fukuda,Toshifumi Watanabe,Jun-ichi Takahashi,M. Takahashi,Tetsufumi Shoji,E. Tamechika,Seiichi Itabashi,H. Morita +9 more
TL;DR: In this article, the Si wire waveguide was used for the fabrication of a ring resonator and lattice filter, which exhibited excellent characteristics because of the microfabrication with the precision of a few nanometers.
Journal ArticleDOI
A receptor for green tea polyphenol EGCG
TL;DR: The major polyphenol in green tea, (−)-epigallocatechin-3-gallate (EGCG), has been shown to prevent carcinogenesis and a receptor that mediates the anticancer activity of EGCG is identified.
Journal ArticleDOI
Wortmannin, a microbial product inhibitor of myosin light chain kinase.
Satoshi Nakanishi,S Kakita,I Takahashi,K Kawahara,E Tsukuda,T Sano,Koji Yamada,M Yoshida,Hiroshi Kase,Yuzuru Matsuda +9 more
TL;DR: Wortmannin inhibited both the phosphorylation of myosin light chain and the contraction in rat thoracic aorta stimulated with KCl, which indicates the effectiveness of the compound in the cellular level as an MLCK inhibitor.