著者

斉藤 圭亮 石北 央

出版者

一般社団法人 植物化学調節学会

雑誌

植物の生長調節 (ISSN:13465406)

巻号頁・発行日

vol.50, no.2, pp.133-138, 2015-12-21 (Released:2017-09-29)

参考文献数

11

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We investigated the degrees of chlorin ring deformations of the special pair chlorophylls P_<D1>/P_<D2> in the Photosystem II (PSII) crystal structure, using a quantum mechanical/molecular mechanical approach. We found that (i) the out-of-plane distortion of the PD1 chlorin ring can be described predominantly by a large "doming mode" arising from the axial ligand D1-His198. In contrast, (ii) the deformation of PD2 was caused by a "saddling mode" arising from the D2-Trp191 side chain and the axial ligand D2-His197. However, (iii) the redox potential difference between P_<D1> and P_<D2> was predominantly determined by the PSII electrostatic environment rather than by the degree of the chlorin-ring distortion. (iv) The chlorin ring deformation appears to simply originate from the local steric protein environment of PSII.

著者

斉藤 圭二 樹山 英則 高瀬 敬信

出版者

一般社団法人情報処理学会

雑誌

情報処理 (ISSN:04478053)

巻号頁・発行日

vol.50, no.11, pp.1130-1134, 2009-11-15

参考文献数

1

著者

斉藤 圭 サイッド イスマイル ラシディ モハマドヒシャム 篠崎 道彦

出版者

Architectural Institute of Japan

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.78, no.689, pp.1561-1567, 2013

被引用文献数

1

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The aim of this study is to investigate environmental situation surrounding terraced houses with greenery patterns, and to accumulate objective data and features in the new developed residential area in Malaysia. A computer microclimate simulation technique is applied by combining stored digital spatial data on GIS as main tools. As a results, i) There is almost no temperature changes between the current building shape and after changing the building aspect ratio without additional greening. However after green space added, some contributions for reducing surrounding temperature can be observed. ii) The relatively higher cooling effects of greenery in the surrounding building and block can be observed in the afternoon and evening. iii) Increasing approximately 11% green coverage ratio make effects of reducing about 0.5°C above the green spaces and about 0.3°C on the surrounding area.