半岛bd体育手机客户端 说明

一般描述

Dextrans are polysaccharides with molecular weights ≥1,000 Dalton, with a linear backbone of α-linked D -glucopyranosyl repeating units. Dextrans are found as bacterial extracellular polysaccharides. They are synthesized from sucrose byLeuconostoc mesenteroidesandLactobacillus brevis. Bacteria employ dextran in biofilm formation or as a protective coating to evade host phagocytes in the case of pathogenic bacteria.
Dextran fromLeuconostoc mesenteroides(Mw: 25,000) may be used as an analytical standard to calibrate the column for gel permeation chromatography (GPC).
Dextran is a D-glucosyl homopolysaccharide which has a-1,6 glucosidic linkages with different branches through α-1,2, α-1,3, and α-1,4 linkages correspondingly classified as group A, B and C. It can be synthesized from sucrose by cell-free filtrate.

应用

Markers-dextran with 25000 Da has been used as standard in gel chromatography analysis to determine fractional composition of protein, carbohydrate, phenolic surface active substances in base wine.
将右旋糖酐用作长的亲水性间隔臂提高了作用于大分子的固定化蛋白质的性能。

基本信息

线性分子式	(C6H10O5)n
EC 号	232-677-5
MDL编号	MFCD00130935
NACRES	NA.24

半岛bd体育手机客户端 性质

等级	analytical standard for GPC
质量水平	100
分子量	Mn~20,000 Mp~20,000 Mw~25,000
analyte chemical class(es)	oligosaccharides
technique(s)	gel permeation chromatography (GPC): suitable
Mw/Mn	~1.25
application(s)	food and beverages
格式	neat

安全信息

储存分类代码	13 - Non Combustible Solids
WGK	WGK 2
闪点(F)	Not applicable
闪点(C)	Not applicable
个人防护装备	Eyeshields, Gloves, type N95 (US)