著者
石黒 正路 西原 達郎 田中 里枝
出版者
公益社団法人 日本薬学会
雑誌
YAKUGAKU ZASSHI (ISSN:00316903)
巻号頁・発行日
vol.121, no.12, pp.915-927, 2001-12-01 (Released:2002-09-27)
参考文献数
33
被引用文献数
5 8

An orally active penem antibiotic, Farom (generic name: faropenem), was designed by the conformational analysis of active and inactive penem derivatives. Faropenem showed potent activity against a wide variety of bacteria including extended-spectrum β-lactamase (ESBL)-producing ones. The mechanism of the stability against ESBL was elucidated by modeling the Michaelis complex of faropenem and Toho-1, an ESBL. Modeling of a complex of faropenem at the active site of a penicillin-binding protein 2 (PBP2) model suggested the characteristic affinity for faropenem with PBP2 of Escherichia coli. Faropenem has been totally synthesized from (R)-1,3-butanediol. The synthetic intermediate, a 3-hydroxyethyl-4-acetoxyazetidinone derivative, was efficiently prepared by the 2+2 coupling of a optically active vinyl-sulfide derivative and chlorosulfonyl isocyanate, followed by the substitution of the acetoxy group for the thiophenyl group at the C-4 position.
著者
武岡 春奈 田中 里枝 林 武文
出版者
関西大学総合情報学部
雑誌
情報研究 : 関西大学総合情報学部紀要 (ISSN:1341156X)
巻号頁・発行日
vol.34, pp.21-37, 2011-01-21

色立体視は,背景と2 色以上の領域で構成される平面パタンにおいて,特定の色が進出あるいは後退して知覚される現象である.そのメカニズムは,眼球光学系の軸外色収差に基づく両眼立体視とされているが,それだけでは十分に説明出来ない現象も報告されている.本研究では,軸外色収差による両眼視差量を実験により求め,背景色による奥行きの逆転現象と奥行き量の変化について調べた.また,精密模型眼を用いて光線追跡による数値シミュレーションを行い,実験結果を定量的に説明できることを示した.さらに,自然視の色立体視で顕著な個人差の原因について,シミュレーション結果に基づく考察を加えた. Chromostereopsis is a visual perception where a specifi c color is perceived closer to or farther from the observer than the other colors in a plane pattern that consists of at least two colors with a background color. The mechanism responsible for this phenomenon is considered to be binocular stereopsis by chromatic aberration of the eyeball optical subsystem; however, previous quantitative evaluations have been unsatisfactory. In this paper, we experimentally and numerically study a reversal phenomenon of the depth by background color and a change in the magnitude of this depth. Furthermore, we discuss individual differences in the depth perception in the chromostereopsis on the basis of numerical simulation results.