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~1H-NMR studies on cis-trans isomers of spheroidenes
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作者 姜月顺 小山泰 《Science China Chemistry》 SCIE EI CAS 1996年第1期11-19,共9页
All-trans spheroidene was extracted from the cells of Rhodobacer sphaeroides 2.4.1 and a set of cis-trans isomers were isolated from an isomeric mixture obtained by iodine-sensitized photo-isomerization of the all-tra... All-trans spheroidene was extracted from the cells of Rhodobacer sphaeroides 2.4.1 and a set of cis-trans isomers were isolated from an isomeric mixture obtained by iodine-sensitized photo-isomerization of the all-trans isomer by high-pressure liquid chromatography (HPLC). On the basis of assignment of the 1H-NMR spectra (COSY, long-range COSY, rekyed COSY, ROESY and NOESY) of the all-trans isomer, the configurations of cis isomers were determined by the isomerization shifts of the olefinic 1H signals. The peaks of HPLC could be assigned as follows: A: 9,13’-cis, B1: 5,13-cis, B2: 13,9’-cis, C: 13-cis, E: 9-cis, F: 13’-cis, G: 5,9’-cis, H: 9’-cis, I: all-trans. 展开更多
关键词 spheroidene cis-trans isomerS 2D 1H-NMR high-pressure LIQUID chromatography.
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柠檬醛顺反异构体对黄曲霉超微结构及膜功能的影响 被引量:13
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作者 罗曼 林丽娟 +1 位作者 蒋立科 黄耀熊 《中国生物化学与分子生物学报》 CAS CSCD 北大核心 2007年第9期770-778,共9页
研究柠檬醛顺反异构体(香叶醛和橙花醛)抗菌性是阐明该醛抗菌机理核心所在.用酶转化法合成香叶醛和橙花醛后,用液态或气态的异构单体分别对黄曲霉孢子及菌丝体进行毒化.采用透射电镜、多维显微及激光拉曼散射技术对毒化的黄曲霉孢子及... 研究柠檬醛顺反异构体(香叶醛和橙花醛)抗菌性是阐明该醛抗菌机理核心所在.用酶转化法合成香叶醛和橙花醛后,用液态或气态的异构单体分别对黄曲霉孢子及菌丝体进行毒化.采用透射电镜、多维显微及激光拉曼散射技术对毒化的黄曲霉孢子及菌丝体进行显微结构观察和膜相关参数的测定.结果表明,无论是液体还是气体毒化方式,柠檬醛顺反异构体单独存在时均有抗黄曲霉作用;二者混合物的抗菌总活性与单体相比表现出一定程度协同性;二个异构单体的抗菌作用不仅表现为破坏黄曲霉超微结构,而且还反映在损伤其细胞膜体积调节功能及变形能力. 展开更多
关键词 柠檬醛顺反异构体 黄曲霉 显微结构 膜功能
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