The antimicrobial activity of ethanol extract obtained from Rauvolfia tetraphylla was tested against bacterial species of Escherichia coli ATCC 69314, Streptococcus lactis NCIM 50038, Enterobacter aerogenes NCIM 2340, Alcaligenes faecalis ATCC 15246, Pseudomonas aeruginosa NCIM 2200, Proteus vulgaris ATCC 6380 and fungal species of Fusarium oxysporum NCIM 1008, Alternaria helianthii ATCC 201540...

Antibacterial activity of leaf and stem bark of Pterocarpus santalinus (Fabaceae) was investigated. The antibacterial activity was tested against both Gram-positive and Gram-negative organisms. Among the two extracts tested, stem bark extract exhibited broad-spectrum antibacterial activity against the tested organisms. The stem bark extract showed maximum activity against Enterobacter aerogenes...

Several bacterial isolates were characterized based on their abilities to degrade specific polychlorinated biphenyls (PCBs) and their 16s rRNA gene sequences. The members of one group of bacteria consisting of Alcaligenes species, including the PCB-degrading bacterium Alcaligenes eutrophus H850, had strong abilities to degrade a broad range of PCBs but not the di-para-chlorine-substituted conge...

Novel antibacterial antibiotics, kalimantacins A, B and C, have been isolated from the fermentation broth of Alcaligenes sp. YL-02632S. In this paper, the taxonomy of the producing strain, fermentation, isolation and biological activities of kalimantacins are reported. Kalimantacins inhibit the growth of Staphylococcus aureus and S. epidermidis including multiple-drug resistant strains.

A protein (NosA) in the outer membrane of Pseudomonas stutzeri that is required for copper to be inserted into N2O reductase has been extracted and purified to homogeneity. The purified protein could form channels in black lipid bilayers. Like N2O reductase, NosA contained copper and was only made anaerobically. In contrast to N2O reductase, its synthesis was repressed by exogenous copper (but ...

D-Aminoacylase from Alcaligenes xylosoxydans subsp. xylosoxydans A-6 (Alcaligenes A-6) was strongly inactivated by diethylpyrocarbonate (DEPC). An H67N mutant was barely active, with a kcat/Km 6.3 x 10(4) times lower than that of the recombinant wild-type enzyme, while the H67I mutant lost detectable activity. The H67N mutant had almost constant Km, but greatly decreased kcat. These results sug...

The study was designed for isolation and characterization of azo dye decolourizing bacteria which is a prerequisite for developing a microorganism-facilitated treatment of polluting dyes. In this study nine types of bacteria which were able to decolourize three types of azo dyes (Blue H/C, Red 3B and Yellow 3R dye) were isolated from textile effluents collected from Gazipur industrial area in B...