exopolysaccharides

Exopolysaccharide-Producing Halophilic and Halotolerant Microorganisms Isolated from the Saline Lakes Qarun (Egypt) and Elton (Russia)

Authors: Ibrahim I. M., Konnova S. A., Fedonenko Y. P., Safronova V. I., Sigida E. N., Elbanna K.

Microorganisms inhabiting saline environments can produce compounds unique in structure and properties. This ability recently prompted researchers to study the biotechnological potential of halophiles. This work aimed at screening the exopolysaccharideproducing halophilic and halotolerant microorganisms of two saline lakes, one in in Egypt and the other in Russia. For strain isolation and characterization, we used microbiological and physico-chemical methods, as well as light and transmission electron microscopy.

Characterization Surface Glycopolymers from Halophilic Gram-Negative Bacteria Chromohalobacter salexigens 1QL3 and Halomonas ventosae S5(2)

Authors: Ibrahim I. M., Rybal’chenko D. A., Fedonenko Y. P., Konnova S. A.

Extracellular and membrane polysaccharides of halophilic bacteria arouse the interest of researchers as promising biopolymers involved in adaptation and maintenance of normal physiology of microorganisms in saline environments that accompany many biotechnological processes. This work aimed at structural characteristic of surface glycopolymers of halophilic Gram-negative bacteria isolated from the salt samples of the lakes Qarun (Egypt) and Elton (Russia) – strains Chromohalobacter salexigens EG1QL3 and Halomonas ventosae RU5S2EL, respectively.

Study of influence of Film Coatings on the Basis of Exopolisaccharides of Lactic Acid Bacteria on the Healing of Burns in Rats

Authors: Uryadova G. T., Fokina N. A., Tyapkin A. Y., Shorina L. N., Karpunina L. V.

Was studied the influence of film coatings, created on the basis of exopolysaccharides (EPS) of lactic acid bacteria Lactococcus lactis B-1662 and Streptococcus thermophilus, on the healing of burn wounds in female rats. It has been established that film coatings contribute, albeit to varying degrees, to the healing of burns of grade IIIa in rats. The application of film coatings to the burn site was carried out immediately after the burn was reproduced and then daily for 28 days.

Effect of Exopolysaccharides of the Bacterium Paenibacillus Polymyxa 1465 on Growth and Defense Responses of Wheat

Authors: Konnova S. A., Ignatov V. V., Konnova S. A.

Rhizobacteria of the genus Paenibacillus promote plant growth and induced systemic resistance to diverse environmental stresses. Here we present the results for the effect of exopolysaccharides (EPS) obtained from growth of Paenibacillus polymyxa 1465 with different carbon sources on the early stages in the development of wheat (Triticum aestivum L. cv. Saratovskaya 29) and on the peroxidase activity in wheat seedling tissue.

Biosorption of Cu (II) by an Exopolysaccharide Isolated from Enterobacter Cloacae K7

Authors: Grinev V. S., Fedonenko Y. P., Neshko А. А., Kryuchkova E. V., Lyubun E. V., Turkovskaya O. V.

An extracellular polysaccharide (EPS) produced by the gram- negative nonpathogenic rhizosphere bacteria Enterobacter cloa- cae K7 was isolated and characterized. The process of biosorption of Cu(II) cations from aqueous solution by the isolated exopoly- saccharides was investigated. The maximum sorption capac- ity was 0.17 mM/mg of EPS or 12 g of Cu(II) per g of EPS at pH 5, T = 25 °C, and incubation for 30 min.