Studies were conducted to assess factors that may in ̄uence the rate and extent of biodegradation of polyaromatic hydrocarbons (PAHs) in waters of Guayanilla Bay (latitude, 18°N; longitude, 66.45°W) Puerto Rico. Phenanthrene was used as a model PAHs compound. Both the rate and extent of phenanthrene degradation by natural microbial ̄ora present in seawater samples from Guayanilla Bay were quite s...

Sir: A new antibiotic, 6"'-O-a-n-mannopyranosyl mannosidostreptomycin has been isolated from the culture filtrate of strain MD753-C2, together with streptomycin and mannosidostreptomycin. This strain has been classified as Streptomyces sioyaensis1) which is a new streptomycin-producer. In this communication, the isolation, characterization and structural elucidation of the antibiotic are report...

Biohydrogen production has received widespread attention from researchers in industry and academic fields. Response surface methodology (RSM) was applied to evaluate the effects of several key variables in anaerobic fermentation of glucose with Clostridium butyrium, and achieved the highest production rate and yield of hydrogen. Highest H2 yield of 2.02 mol H2/mol-glucose was achieved from 24 h...

A biocontrol Bacillus velezensis strain, NT35, was isolated from the rhizosphere soil of ginseng, and its sterile filtrate obtained through a 0.22 μm filter which had significant inhibitory effect against Ilyonectria robusta, causes rusty root rot in Panax ginseng. In order to obtain best filtrate, medium fermentation conditions strain NT35 were optimized using response surface methodology (RSM...

In the present study, a comprehensive and systematic strategy was described to evaluate the performance of several three-way calibration methods on a bio-analytical problem. Parallel factor analysis (PARAFAC), alternating trilinear decomposition (ATLD), self-weighted alternating trilinear decomposition (SWATLD), alternating penalty trilinear decomposition (APTLD) and unfolded partial least squa...

in the present study, a comprehensive and systematic strategy was described to evaluate the performance of several three-way calibration methods on a bio-analytical problem. parallel factor analysis (parafac), alternating trilinear decomposition (atld), self-weighted alternating trilinear decomposition (swatld), alternating penalty trilinear decomposition (aptld) and unfolded partial least squa...

fluvoxamine maleate is a selective serotonin reuptake inhibitor, which is used for the treatment of different types of depressive disorders. in the present study, a stability indicating hplc method was developed and validated for the determination of fluvoxamine maleate. the chromatographic separation was carried out using a nova-pak cn column and a mixture of k2hpo4 50 mm (ph 7.0) and acetonit...