Download Cyclic β-Glucans from Microorganisms: Production, Properties by Geetha Venkatachalam, Sathyanarayana Gummadi, Mukesh Doble PDF

By Geetha Venkatachalam, Sathyanarayana Gummadi, Mukesh Doble

to Cyclic glucans are polysaccharides which are predominantly produced by way of Agrobacterium, Bradyrhizobium and Rhizobium sp. and widespread within the pharmaceutical and nutrients industries. during this booklet, the functions, homes, analytical instruments, creation and genes of 4 major cyclic β-glucans from microorganisms are highlighted and seriously evaluated. As biocompatible and biodegradable renewable assets, they've got a big capability for destiny functions, which has no longer but been totally exploited. This concise overview may also help to bridge this gap.

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Additional info for Cyclic β-Glucans from Microorganisms: Production, Properties and Applications

Example text

The procedure for the preparation of this complex involves the following steps. 10 mM of stock solution of luteolin is prepared in acetone. One ml of this stock is added to 1 ml of aqueous solution of neutral cyclic-b (1,2)-glucan. The mixture is kept under shaking for 24 h at 30 °C, then partially evaporated, lyophilized, and mixed with 1 ml of distilled water. 4 lm membrane filter. The product could be analyzed and quantified with a HPLC. Changes in the NMR peak shape and chemical shift is observed after complexation.

4), is another glucan produced by Bradyrhizobium sp. (Miller et al. 1990). It is smaller than the cyclic b-(1,2)-glucans produced by Agrobacterium and Rhizobium species. There are very brief mention of other cyclic glucans in the literature including b-(1,3)-(1,4)-D-glucans which are the predominant components of cereal grain cell walls including barley and oats (Laroche and Michaud 2007). 1 (Zevenhuizen 1984; Kawaharada et al. 2008; Amemura 1984; Zevenhuizen et al. 1990; Williamson et al. 1992; Breedveld et al.

Cyclic glucans produced by Rhizobium meliloti 2011, are used as a chiral additive for the separation of enantiomers of terbutaline, amethopterin, thyroxine, and N-acetylphenylalanine in aqueous capillary electrophoresis (CE) (Lee and Jung 2003; Choi et al. 2000). Enantiomeric separation takes place in the normal- or reverse-polarity mode when a high concentration of neutral (60 mM) or anionic (40 mM) cyclic glucan is added to the background electrolyte. This glucan provides the required difference in both the binding of the enantiomers and their mobility.

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