Complementary spectroscopy studies and potential activities of levan-type fructan produced by Bacillus paralicheniformis ND2.

This study aimed at the production of marine bacterial exopolysaccharides (EPS) as biodegradable and nontoxic biopolymers, competing the synthetic derivatives, with detailed structural and conformational analyses using spectroscopy techniques. Twelve marine bacterial bacilli were isolated from the seawater of Mediterranean Sea, Egypt, then screened for EPS production. The most potent isolate was identified genetically as Bacillus paralicheniformis ND2 by16S rRNA gene sequence of ~99 % similarity.

Statistical optimization of experimental parameters for extracellular synthesis of zinc oxide nanoparticles by a novel haloalaliphilic Alkalibacillus sp.W7.

Green synthesis of zinc oxide nanoparticles (ZnO NPs) through simple, rapid, eco-friendly and an economical method with a new haloalkaliphilic bacterial strain (Alkalibacillus sp. W7) was investigated. Response surface methodology (RSM) based on Box-Behnken design (BP) was used to optimize the process parameters (ZnSO.

Optimization of methylene blue degradation by Aspergillus terreus YESM 3 using response surface methodology.

Synthetic dyes released from many industries cause pollution problems in aquatic environments affecting public health. The present study aimed to explore the potentiality of Aspergillus terreus YESM 3 (accession number LM653117) for colour removal of three different dyes: methylene blue (MB), malachite green (MG) and safranin (S). Results showed that the tolerance index of the studied fungus against tested dyes decreased in the order: methylene blue, safranin and malachite green.

Hexavalent chromium reduction by chromate-resistant haloalkaliphilic sp. M-Cr newly isolated from tannery effluent.

The current study aimed to isolate and characterize a chromate-resistant bacterium from tannery effluent, able to reduce Cr(VI) aerobically at high pH and salinity. Environmental contamination by hexavalent chromium, Cr(VI), presents a serious public health problem. Enrichment led to the isolation of 12 bacteria displaying different degrees of chromate reduction.

Isolation and characterization of a phenol-degrading strain of Alcaligenes sp. AM4.

Six isolates with phenol degrading ability were obtained from marine sediments by enrichment procedures and an isolate, AM4, was identified as Alcaligenes sp. by 16S rDNA sequencing. The Plackett-Burman design was applied to estimate the significance of culture medium components and conditions for phenol degradation by Alcaligenes sp.