H Polasa

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BACKGROUND Eradication of Helicobacter pylori is an important objective in overcoming gastric diseases. Many regimens are currently available but none of them could achieve 100% success in eradication. Eugenol and cinnamaldehyde that are commonly used in various food preparations are known to possess antimicrobial activity against a wide spectrum of(More)
Plumbagin, a compound derived from the roots of Plumbago zeylanica (Chitramool) was studied for its effect on the development of antibiotic resistance using antibiotic sensitive strains of Escherichia coli and Staphylococcus aureus. A delayed growth was seen when these organisms were inoculated into the antibiotic (streptomycin/rifampicin) medium, due to(More)
Treatment of E. coli 46R641 cells carrying multidrug resistant TP181 plasmid with phenolic compounds namely bharangin, gossypetin, gossypin and quercetin lead to the concurrent loss of all the six plasmid linked antibiotic resistance markers. Among these test compounds, bharangin exhibited higher efficiency in curing of plasmids belonging to IncF1, H1 and X(More)
This paper reports the antimutagenic activity of plumbagin (5-hydroxy-2-methyl-1, 4-naphthoquinone) against certain known chemical mutagens in a standard mutagenicity test system of Ames using S. typhimurium strains. Plumbagin by itself did not show any mutagenic effect, whereas it reduced significantly the mutagenic effect of 4-nitrophenylene diammine,(More)
Axenic culture of photosynthetic purple sulphur bacterium, isolated from a paper mill effluent, grew best with ammonium chloride as nitrogen source. Cells grown with N2 or ammonium chloride produced hydrogen with initial lag periods of 24 and 48 h, respectively. The maximum amount of hydrogen was evolved by cells grown with N2 and with malate as electron(More)
Earlier we reported that both actively replicating (A2 and B) and live but nonreplicating (C) strains of influenza virus induced significant percentages of chromosome aberrations in the spermatogonia of the infected mice, suggesting that virus replication was not essential for the induction of chromosome aberrations. In the present communication, data are(More)