| Chemical | |
| Description | Gellan is a microbial polysaccharide produced by Pseudomonas elodea and produces gels having similar properties to agar. The molecular structure of gellan gum is a linear chain based on repeating glucose, rhamnose and glucuronic acid units. In its native, or high acyl form, two acyl substituents - acetate and glycerate - are present. Both substituents are located on the same glucose residue, and on average, there is one glycerate per repeat and one acetate per every two repeats. In low acyl gellan gum, the acyl groups are removed completely. Deacylation provides gellan gum in this low acyl form. The acyl groups have a profound influence on gel characteristics. The high acyl form produces soft, elastic, non-brittle gels, whereas the low acyl form produces firm, non-elastic, brittle gels. |
Dextra于1989年在英国雷丁成立，旨在为科研界提供碳水化合物的合成和分析服务。从那时起，该公司因其用于医学研究，诊断和制药应用的稀有糖，寡糖和手性分子的供应而享誉全球。Dextra的活动已成功通过ISO9001：2008注册。
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