ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Asmaa M. Youssif1 , Moaz M. Hamed2 and Mohamed A.A. Abdrabo3
1Department of Botany and Microbiology, Faculty of Science, Alexandria University, Egypt.
2Marine Microbiology Laboratory, Marine Environmental Division, National Institute of Oceanography and Fisheries, Egypt.
J Pure Appl Microbiol. 2020;14(4):2745-2756 | Article Number: 6522 | © The Author(s). 2020
Received: 07/07/2020 | Accepted: 10/12/2020 | Published: 26/12/2020

Halophilic micro-organisms often synthesize and produce extracellular polysaccharides (EPS), whose physical, chemical properties and material properties vary greatly from each other. The extracellular polysaccharide (EPS) development of Halomonas sp. MN795630 strain type halophilic bacterium (NASH) was investigated and whether biotechnological applications were feasible. After 168 hours of incubation, 4 g/L of EPS was produced and all elements from the medium were completely used during the growth. Sucrose has been identified as the most favorable carbon source for production of EPS and maximum production (6 g/l). Beef extract level was shown to be the best for EPS production among different nitrogen sources. Optimum production of EPS (10 g/L) were achieved by supplementing the medium with 4M NaCl, pH adjusted at 9 and the medium was inoculated with 7% initial inoculum. The purified EPS were characterized chemically. Fourier transform infrared (FTIR) spectrophotometer was observed in several functional groups. EPS also demonstrated an significant inhibitor of Candida albicans ATCC 10231 and Pseudomonas aeruginosa ATCC 9027 (20.4 and 14.7 mm), respectively. EPS show satisfactory results when applied as anti-oxidant, anti-inflammatory and emulsifier.


Exopolysaccharides, Halomonas sp. NASH, Optimum conditions, Antimicrobial activity, Antioxidant activity, Anti-inflammatory

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