柳兰[柳叶菜科柳叶菜属植物柳兰（Chamaenerion angustifolium (L.) Scop.）]的叶单宁。
The leaf tannin of willow-herb [Chamaenerion angustifolium (L.) Scop.].
作者信息
Brown B R, Brown P E, Pike W T
出版信息
Biochem J. 1966 Sep;100(3):733-8. doi: 10.1042/bj1000733.
Abstract
- The leaf tannin of willow-herb [Chamaenerion angustifolium (L.) Scop.] has been isolated and separated into two fractions of differing solubility. 2. The tannin contains a penta-O-galloyl-beta-d-glucose core to which further galloyl groups are depsidically bound. 3. The unfractionated tannin contains an average of 10.5 galloyl groups/glucose molecule; the soluble fraction has on average 7.6 galloyl groups/glucose molecule and the less soluble fraction has 12.4. 4. The tannin is a mixture of molecules ranging at least from hepta- to trideca-galloyl-beta-d-glucose. 5. The tannin forms complexes with proteins and the fact that it is a hydrolysable gallotannin has a bearing on the release of nitrogen from the protein of the dead leaf.
摘要
- 柳叶菜[Chamaenerion angustifolium (L.) Scop.]的叶单宁已被分离并分成两种溶解度不同的组分。2. 该单宁含有一个五-O-没食子酰基-β-D-葡萄糖核心，还有更多的没食子酰基以缩酚酸键的形式与之相连。3. 未分级的单宁平均每个葡萄糖分子含有10.5个没食子酰基；可溶级分平均每个葡萄糖分子有7.6个没食子酰基，较难溶级分有12.4个。4. 该单宁是一种分子混合物，其范围至少从七没食子酰基-β-D-葡萄糖到十三没食子酰基-β-D-葡萄糖。5. 该单宁与蛋白质形成复合物，并且它是一种可水解的棓酸单宁这一事实与死叶蛋白质中氮的释放有关。
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