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Anti microbial and anti-oxidant properties of the isolated compounds from the methanolic extract from the leaves of Tectona grandis

Author(s): Naira Nayeem, MD Karvekar

The compounds Gallic acid (GA), rutin(R), quercitin (Q), ellagic acid (EA) and sitosterol(S) were isolated from the methanolic extract of the leaves of Tectona grandis. These compounds were subjected to antimicrobial and antioxi-dant activity. The zone of inhibition of isolated compounds was evaluated by cup plate method against bacteria i.e. Staphylococcus aureus, Bacillus subtilis, Eschericia coli, Klebsiella pneumoniae and fungi Candida albicans. The anti oxidant activity of the extract and the isolated compounds were evaluated by using 1, 1-Diphenyl-2-picryl-hydrazyl (DPPH). Rutin has shown significant anti microbial activity against both the gram positive and gram negative bacteria when compared to the other compounds. The results of the anti oxidant activity revealed that quercitin showed good activity followed by rutin gallic acid, ellagic acid and sitosterol. The difference in both these activities of the isolated compounds was attributed to the number and position of the phenolic OH groups.

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