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tiffanybiu新蟲 (初入文壇)
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[求助]
【求助文章翻譯】翻譯天然藥化論文的這一段
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Cynomorium plants contain large amount of flavonoids with flavan-3-ols being the major ones. Other sub-flavonoid types in Cynomorium plants are flavones, flavonols, and flavanones. From the aqueous extract of the stems of C. songaricum, catechin, procyanidin B-1 , procyanidin B-6 , flavan-3-ol trimers, flavan-3-ol tetramers, flavan-3-ol pentamers, and flavan-3-ol polymers (condensed tannins) were obtained. Thiolytic degradation of the flavan-3-ol polymers yielded benzylthioepicatechin, indicating that the extender flavan unit of the condensed tannin is mainly epicatechin . The flavan-3-ol polymers showed inhibitory activity against HIV PR with the activity increased as the molecular weight increased. Using capillary electrophoresis with amperometric detection, epicatechin and catechin were detected in all of the seven Cynomorium samples collected in different areas Two anthocyanin pigments were isolated from the flowering tops of C. coccineum. Cyanidin 3-O-glucoside was identified to be the major pigment (92%), while cyanidin 3-O-rhamnosylglucoside was identified to be the minor one (8%) . Besides the above mentioned flavan-3-ols and anthocyanins, compounds 20-27 (Fig. 5) of other flavonoid sub-types were isolated or detected in C. songaricum. |
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jincan2014
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3樓2014-05-18 18:27:54
jincan2014
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RXMCDM: 金幣+1 2014-05-18 18:33:58
tiffanybiu(RXMCDM代發(fā)): 金幣+5 2014-06-14 00:02:31
RXMCDM: 金幣+1 2014-05-18 18:33:58
tiffanybiu(RXMCDM代發(fā)): 金幣+5 2014-06-14 00:02:31
| 植物鎖陽含有大量的黃酮類化合物，以黃烷-3-醇類為主。在植物鎖陽中其它的黃酮類化合物有黃酮、黃酮醇和二氫黃酮。從鎖陽的水提液中得到兒茶素、原花青素B-1、原花青素B-6、黃烷-3-醇三聚體、黃烷-3-醇四聚體、黃烷-3-醇五聚體和黃烷-3-醇多聚體。硫解降級黃烷-3-醇多聚體產(chǎn)生苯甲基硫表兒茶素，表明冷凝的單寧酸黃烷聚合體的混合物主要是表兒茶素。 |
2樓2014-05-18 18:26:05
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