Ibrahim Ibrahim M. RussiaSaratov State University , 83, Astrakhanskaya str., Saratov, 410012, Russia ibrahim.egypt2016@yandex.ru Author's articles Characterization Surface Glycopolymers from Halophilic Gram-Negative Bacteria Chromohalobacter salexigens 1QL3 and Halomonas ventosae S5(2) Exopolysaccharide-Producing Halophilic and Halotolerant Microorganisms Isolated from the Saline Lakes Qarun (Egypt) and Elton (Russia) Evaluation of the secondary structure of poly-γ-glutamic acid produced by Bacillus subtilis EGP5QL12 by circular dichroism spectroscopy method