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Antimicrobial substances in Lawsonia Inermis and Stevia Rebaudiana for controlling spoilage micro organisms

Muhamad, I. I. and Ahmad, N. U. and Mohd. Nawi, N. and Tin, L. C. and Sarmidi, M. R. (2008) Antimicrobial substances in Lawsonia Inermis and Stevia Rebaudiana for controlling spoilage micro organisms. Journal of Chemical & Natural Resources Engineering, 2 . pp. 99-107. ISSN 1823-5255

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Abstract

Lawsonia inermis was extracted by soxhlet apparatus using ethanol and petroleum ether as solvent whereas ethanol and hexane were used in the extract of Stevia rebaudiana. All the extract were tested against B.subtilis (Gram-positive bacteria), E.coli (Gram-negative bacteria), A. fumigatus and yeast by disc diffusion method. Both extracts showed good inhibitory effects towards the growth of all the micro organism where the maximum inhibition (3.2±O.l cm) was recorded for Lawsonia inermis against B. subtilis. Colonyforming efficiency test was performed to determine the sensitivity of the bacterial strains to the extracts.

Item Type:Article
Additional Information:Advances in Product Development
Uncontrolled Keywords:Lawsonia inermis, Stevia rebaudiana, B.subtilis, E.coli, A. fumigatus,disc diffusion
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:12233
Deposited By: Ms Zalinda Shuratman
Deposited On:18 Apr 2011 02:26
Last Modified:18 Apr 2011 02:26

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