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198 results on '"Kosemura, Seiji"'

10. UV-Bダメージにより植物から遊離される生態系有用生物の忌避物質 : 環境ストレスにより生産される生態系破壊型物質

Author

慶應義塾大学日吉化学教室, Department of Chemistry, Keio University, ドイ, シオリ, コセムラ, セイジ, Doi, Shiori, Kosemura, Seiji, 土居, 志織, 小瀬村, 誠治, 慶應義塾大学日吉化学教室, Department of Chemistry, Keio University, ドイ, シオリ, コセムラ, セイジ, Doi, Shiori, Kosemura, Seiji, 土居, 志織, and 小瀬村, 誠治

Abstract

publisher, 横浜, Earthworms, which are very helpful in the formation of vegetable mould, though weak in sunlight, are one of the most important living creatures in relation to agricultural crops, wild plants and ecosystem functions. Increased exposure to UV-B on the surface of the earth due to the depletion of stratospheric ozone is known to cause a variety of physiological and morphological responses in plants. 3-Indolylacetonitrile as a repellent against earthworms, has been isolated from UV-B damaged cabbage (Brassica oleacea L.) shoots., 原著論文

Published
2020

23. トウダイグサ有毒ジテルペン，ユーホルニンの合成研究（Ⅱ）

Author

慶応義塾大学法学部日吉化学教室, 慶応義塾大学理工学部化学科, Department of Chemistry，Hiyoshi Campus Keio University, Department of Chemistry, Faculty of Science and Technology， Keio University, Department of Chemistry，Faculty of Science and Technology， Keio University，, コセムラ, セイジ, クリハラ, シンワ, ヤマムラ, ショウスケ, Kosemura, Seiji, Kurihara, Shinwa, Yamamura, Shosuke, 小瀬村, 誠治, 栗原, 伸和, 山村, 庄亮, 慶応義塾大学法学部日吉化学教室, 慶応義塾大学理工学部化学科, Department of Chemistry，Hiyoshi Campus Keio University, Department of Chemistry, Faculty of Science and Technology， Keio University, Department of Chemistry，Faculty of Science and Technology， Keio University，, コセムラ, セイジ, クリハラ, シンワ, ヤマムラ, ショウスケ, Kosemura, Seiji, Kurihara, Shinwa, Yamamura, Shosuke, 小瀬村, 誠治, 栗原, 伸和, and 山村, 庄亮

Abstract

横浜, Euphornin， isolated from EuphoYbia heiioscopia L.(Toudai Gusa in Japanese)，is atoxic diterpene having antitumor activity. Euphornin is a highly oxygenatedditerpene containing two double bond included in a 12-membered ring. Oxidativecleavage of both double bonds afforded two segments， the C1-C5・C12-C15 segmentand the C6-C11 segment， which would be key intermediates for total synthesis ofeuphornin. Previously， we reported that the degradation reaction of euphornin hasbeen carried out to afford the C1-C5・C12-C15 segment which is expected to becoupled with the C6-C11 segment giving rise to euphornin. In the present paper，new degradation reaction of euphornin has been carried out to afford the desiredcompound having the C1-C5・C12-C15 segment， which was then converted to thesynthetic key intermediate.

Published
2003

24. 細胞融合の手法によるハイブリッド菌株とその代謝産物

Author

Department of Chemistry, Hiyoshi Campus Keio University, Department of Chemistry, Faculty of Science and Technology, Keio University, 小瀬村, 誠治, コセムラ, セイジ, Kosemura, Seiji, 須藤, 祥, スドウ, ショウ, Sudo, Sho, 山村, 庄亮, ヤマムラ, ショウスケ, Yamamura, Shosuke, Department of Chemistry, Hiyoshi Campus Keio University, Department of Chemistry, Faculty of Science and Technology, Keio University, 小瀬村, 誠治, コセムラ, セイジ, Kosemura, Seiji, 須藤, 祥, スドウ, ショウ, Sudo, Sho, 山村, 庄亮, ヤマムラ, ショウスケ, and Yamamura, Shosuke

Abstract

横浜, 原著論文, Extensive studies on the metabolites of penicillia which cause so-called “yellow rice”led to the successful isolation of a variety of bioactive compounds.Recently, the cell fusion between genetically close penicillia has been carried out to give some hybrid strains,which produced a variety of novel compounds,indicating that the cell fusion technique is quite useful for finding of new bioactive compounds. In this study, a hybrid strain KO 0193was generated using Penicillium citreo-viride Biourge IFO 4692, a producer of phenolic compounds, and P. pedemontanum IFO 9583, a producer of pyrone-type compounds, by means of cell fusion technique using polyethylene glycol. The metabolites of the hybrid strain KO 0193 was extracted after culture of 2 months. Further isolation of this extract was carried out using different kinds of chromatography to give rise to some novel compounds.These compounds have a carbon skeleton of isochroman and evidently different from any other metabolites which have been isolated. These isochromans have been proved to promote the growth of hypocotyls of Lactuca sativa (lettuce).

Published
2003

33. Journal of Weed Science and Technology

Author

Nishijima, Keiko, primary, Tomita-Yokotani, Kori, additional, Tsubura, Hirokazu, additional, Kosemura, Seiji, additional, Yamamura, Shosuke, additional, Yamada, Kosumi, additional, and Hasegawa, Koji, additional

Published
2000
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