本文利用扫描电子显微镜对大叶卷柏 (SelaginellabodinieriHieron .)、疏松卷柏 (S .effusaAlston)、具边卷柏 (S .limbataAlston)、海南卷柏 (S .rolandi principisAlston) 4种卷柏小孢子进行观察 ,描述分析其形态结构 ,并与光学显微...本文利用扫描电子显微镜对大叶卷柏 (SelaginellabodinieriHieron .)、疏松卷柏 (S .effusaAlston)、具边卷柏 (S .limbataAlston)、海南卷柏 (S .rolandi principisAlston) 4种卷柏小孢子进行观察 ,描述分析其形态结构 ,并与光学显微镜下的观察结果做对比 .本次观察对传统处理扫描电子显微镜样品的方法进行改进 ,节省了可利用空间 .减少了污染 .本文为卷柏科系统分类学和孢粉学补充了有价值的资料 .展开更多
6-（5-Carboxyl-2-methoxyphenyl）-apigenin （1）, a new flavonoid, was isolated from the 60% ethanol extract of Selaginella uncinata （Desv.） Spring. Its structure was established by spectroscopic methods. Compound 1 ...6-（5-Carboxyl-2-methoxyphenyl）-apigenin （1）, a new flavonoid, was isolated from the 60% ethanol extract of Selaginella uncinata （Desv.） Spring. Its structure was established by spectroscopic methods. Compound 1 represents the first example of the flavonoids possessing a benzoic acid substituent at C-6.展开更多
A new biflavonoid, 2,3-dihydro-5,5″,7,7,4′-pentahydroxy-6,6＂-dimethyl-[3′-O-4″]-biflavone 1 and two known biflavonoids 2,3＂-dihydroochnaflavone 2 and 2″,3″-dihydro-3′,3-biapigenin 3 were isolated from the her...A new biflavonoid, 2,3-dihydro-5,5″,7,7,4′-pentahydroxy-6,6＂-dimethyl-[3′-O-4″]-biflavone 1 and two known biflavonoids 2,3＂-dihydroochnaflavone 2 and 2″,3″-dihydro-3′,3-biapigenin 3 were isolated from the herb of Selaginella labordei Hieron. ex Christ. Their structures were elucidated by spectroscopic methods. ？2009 Ke Li Chert. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.展开更多
基金the National Basic Research Program of China(No.2006CB504100).
文摘6-（5-Carboxyl-2-methoxyphenyl）-apigenin （1）, a new flavonoid, was isolated from the 60% ethanol extract of Selaginella uncinata （Desv.） Spring. Its structure was established by spectroscopic methods. Compound 1 represents the first example of the flavonoids possessing a benzoic acid substituent at C-6.
基金supported by the National Natural Science Foundation of China(No.30470193).
文摘A new biflavonoid, 2,3-dihydro-5,5″,7,7,4′-pentahydroxy-6,6＂-dimethyl-[3′-O-4″]-biflavone 1 and two known biflavonoids 2,3＂-dihydroochnaflavone 2 and 2″,3″-dihydro-3′,3-biapigenin 3 were isolated from the herb of Selaginella labordei Hieron. ex Christ. Their structures were elucidated by spectroscopic methods. ？2009 Ke Li Chert. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
