منابع مشابه
Enzymatic synthesis of glycosides: from natural O- and N-glycosides to rare C- and S-glycosides
Carbohydrate related enzymes, like glycosyltransferases and glycoside hydrolases, are nowadays more easily accessible and are thought to represent powerful and greener alternatives to conventional chemical glycosylation procedures. The knowledge of their corresponding mechanisms has already allowed the development of efficient biocatalysed syntheses of complex O-glycosides. These enzymes can al...
متن کاملEffects of Cardiac Glycosides
Using microelectrodes having an external diameter of less than 1 ,u, potential variations of single caidiac fibers were obtained from frog ventriculai' muscle in situ. The normal membrane potential consists of a rapid depolarization and slow reecovery, the latter occurring in three distinct phases. Digitalis glycosides alter profoundly the slopes of these various phases and dlastically shorten ...
متن کاملPolycationic glycosides.
Cationic lipids have long been known to serve as antibacterial and antifungal agents. Prior efforts with attachment of cationic lipids to carbohydrate-based surfaces have suggested the possibility that carbohydrate-attached cationic lipids might serve as antibacterial and antifungal pharmaceutical agents. Toward the understanding of this possibility, we have synthesized several series of cation...
متن کاملSynthesis of «-Tocopheryl Glycosides
The therapeutic application of vitamin E is seri ously limited by its very low solubility in aqueous phases, and tocopherols cannot be used when in stant adm inistration of a strong antiradical and antioxidant agent is needed. To increase solubility in w ater and facilitate perm eability through cellu lar m em branes tocopherol can be attached to a carbohydrate moiety [1]. The synthesis of s...
متن کاملNew Glycosides of Lignin
New biodegradable surface active agents were prepared by glycosidation of prehydrolysis lignin with the D-glucose using anhydrous ferric chloride as the catalyst which afforded polymeric alkyl, benzyl and aryl glucofuranoside derivatives of lignin. Moreover, a series of novel lignin-based surface active agents was obtained by subsequent Oxidation of the primary alcohol groups of u-glucose into ...
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ژورنال
عنوان ژورنال: Nature
سال: 1936
ISSN: 0028-0836,1476-4687
DOI: 10.1038/138038c0