Bacterial production of polyunsaturated fatty acids (PUFAs) is a potential biotechnological approach for production of valuable nutraceuticals. Reliable method for screening of number of strains within short period of time is great need. Here, we report a novel simplified method for screening and isolation of PUFA-producing bacteria by direct visualization using the H(2)O(2)-plate assay. The ox...

The present study was carried out to find out the antimicrobial activity of aqueous, acetone and ethyl acetate extract of Morus nigra and Citrus limon. Antimicrobial analysis was done by using agar well diffusion method against bacterial pathogens. Ethyl acetate extract of Morus nigra exhibited the maximum zone of inhibition against Staphylococcus aureus, while ethyl acetate extract of Citrus l...

BACKGROUND AND OBJECTIVES Bacterial resistance to antibiotics has motivated the researchers to evaluate the novel anti-bacterial compounds such as some thiazole and imidazole derivatives. Thereby, in this work, we investigated the anti-bacterial effects of one new thiazole and two new imidazole derivatives on Bacillus cereus, Listeria monocytogenes, Escherichia coli, Salmonella typhimurium, Pro...

The flavonoid apigenin was isolated from aerial part of P. oleracea L. The dried sample of plant was powdered and subjected to soxhlet extractor by adding 80 mL of ethanol : water (70 : 30). The extract was centrifuged at 11000 rpm for 30 min; supernatant was taken for further use. The fraction was concentrated and subjected to PTLC. The R f value of isolated apigenin was calculated (0.82). Pur...

results the mean of the inhibition zone diameter around the discs of green tea extract in all concentrations was significantly less than 1% sodium hypochlorite (p < 0.001). the antimicrobial effect increased in higher concentrations of extracts of green tea (p < 0.001). conclusions although the antimicrobial effect increases in higher concentrations of extracts of green tea, 1% sodium hypochlor...

In this work, Ag/Ag2O composites were synthesized by treating silver thin films manufactured thermal evaporation method with oxygen plasma afterglow. order to verify the antibacterial behavior of these composites, inhibition zone tests realized for Staphylococcus aureus. The results showed that individual nanoparticles at concentrations can be controlled stoichiometric ratios main factor in bac...

introduction: the aim of this study was to compare the antimicrobial effects of mtad, sodium hypochlorite (naocl) and their combination on endodontic micro-organisms. materials and methods: zone of inhibition (zi) and minimum inhibitory concentration (mic) were the techniques used. in zi technique blood agar plates were inoculated with organisms, paper discs were soaked with irrigants and maxim...

The antibacterial activity of Wrightia tinctoria (Roxb.) R. Br. callus extract was studied against selected pathogenic bacterial strains, Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Bacillus subtilis by Agar disc diffusion method. Among the three solvents and water were used , methanol extract of callus showed higher inhibition zone against Pseudomonas aeruginosa (27 mm)...