A kind of method that utilizes Acinetobacter to increase the production of bacterial curdlan

Abstract

The invention relates to a method for increasing the yield of curdlan by using Acinetobacter, which comprises: co-cultivating Acinetobacter ruckeri and curdlan-producing bacteria to obtain the product. The method of the invention improves the rubber yield of the curdlan gum-producing bacteria, and provides a new method for microbial fermentation to produce the curdlan gum.

Description

technical field

[0001] The invention belongs to the field of methods for increasing the yield of curdlan, in particular to a method for increasing the yield of curdlan by using Acinetobacter. Background technique

[0002] Curdlan, also known as thermal gel, is a microbial exopolysaccharide mainly produced by bacteria of the genus Agrobacterium sp. and Rhizobium sp. Curdlan gum molecule is a linear molecule composed of glucose structural units connected by β-1,3 glycosidic bonds, without branches, and the relative molecular mass is about 5.3×10 4 ~2.0×10 6 .

[0003] Curdlan gum has unique properties such as rheology, thermal gelation and simple structure, and can be widely used in food, biomedicine and other fields. Curdlan gum has the characteristic of heating and solidifying into gel, and the formed gel can be divided into low-grade gel and high-grade gel. Heat the aqueous dispersion of curdlan gum to 55-65°C and then lower the temperature to form a thermally reversibl...