Tannins and related compounds. Part XLIII. Isolation and structures of procyanidins (condensed tannins) from Rhaphiolepis umbellata.
نویسندگان
چکیده
منابع مشابه
Condensed tannins. 20. Chromophoric properties of flavan-4-ols, flavan-3,4-diols and condensed tannins.
Brown, B. R. & MacBride, J. A. H. (1963). Chem. & Ind. p. 1037. Clark-Lewis, J. W. & Jackman, L. M. (1961). Proc. chem. Soc. p. 165. Clark-Lewis, J. W., Jackman, L. M. & Williams, L. R. (1962). J. chem. Soc. p. 3858. Clark-Lewis, J. W. & Katekar, G. F. (1962). J. chem. Soc. p. 4502. Clark-Lewis, J. W. & Mortimer, P. I. (1960). J. chem. Soc. p. 4106. Conroy, H. (1960). Advanc. org. Chem. 2, 308....
متن کاملTannins of Constant Structure in Medicinal and Food Plants—Hydrolyzable Tannins and Polyphenols Related to Tannins
In addition to the commonly used classification as hydrolyzable tannins and condensed tannins, tannins can also be categorized into two other types: polyphenols of constant chemical structure (Type A) and polyphenols of variable composition (Type B). Both types of tannins and related polyphenols account for a large part of plant polyphenols, but accurate structure-activity correlations on a mol...
متن کاملInteractions of Condensed Tannins with Selected Proteins
The relative affinities ufeondensed tannins purilied from sorghum, pinto bean, quebracho and wattle for six dissimilar protins have been determined by a competitive binding assay. The results indicate that tannin/protein interactions may be specific for different tanains as well as for different proteins. The highly specific interactions suggest that the differences in affinity are functionally...
متن کاملExtraction of condensed tannins from Mexican plant sources.
Contents of total polyphenols, condensed tannins and proanthocyanidins, and their stability to various pH values and temperatures were studied in Mexican blueberry, cuautecomate fruit, garambullo fruit, aubergine, coffee pulp and residues of black grapes. Several aqueous extracts, obtained through a one-pass-extraction process, were analyzed using liquid chromatography in order to quantify the ...
متن کاملAnalysis and decomposition of condensed tannins in tree leaves
In the past decades, many studies have shown that tannins (polyphenolic compounds) are involved in defence mechanisms of plants against attack by bacteria, fungi, and herbivores. Little is known about the mechanisms of action of the polyphenolic compounds (Zucker 1983, Scalbert 1991) even though modern analytical methods have improved the analysis of these complex structures (Mole and Watermann...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1986
ISSN: 0002-1369,1881-1280
DOI: 10.1271/bbb1961.50.2061