'Petroleum ether' diaporamas de présentation

Dr. M. Abd-Elhakeem

College of Biotechnology Organic Chemistry Lecture 2. Basic concepts of organic chemistry. Dr. M. Abd-Elhakeem. Physical properties.

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Increasing the Yield of Fat Extracted from Processed Foods With Petroleum Ether

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Antimicrobial Activity of Earthworm Extracts

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Phytochemical and antimicrobial studies on the leaves of Spilanthes acmella

Modern pharmacopoeia still contain at least 25% drugs derived from plants and many others which are synthetic analogues built on prototype compounds isolated from plants. The work is being pursued on the phytochemical, antimicrobial and antioxidant investigation on the leaves of Spilanthes acmella. Successive extraction of the crushed leaves of the plants has been done with various solvents and these extracts were tested quantitatively. These extracts were further tested for their antimicrobial activity against the bacterial strains of Escherichia coli, Bacillus cereus, Pseudomonas aeruginosa, Micrococcus luteus, Klebsiella pneumonaie and against the fungal strains of Aspergillus niger, Penicillum chrysogenum, Rhizopus arrhigus, Rhizopus stolonifer. The results have shown that the ethyl acetate and methanol extracts can act as a standard drug against the becterial strain of Klebsiella pneumonaie and the water and ethyl acetate extract also showed very good activity against the fungal strains of Rhizopus stolonifer and Rhizopus arrhigus.

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Antimicrobial potential of Plumeria rubra Syn Plumeria acutifolia bark

Successive extracts of Plumeria rubra Syn Plumeria acutifolia were prepared using petroleum ether (60-80OC), chloroform, methanol and water. The stock solution of 10 mg/ml of the extracts were screened for antimicrobial activity by using Cup plate method and Minimum inhibitory concentration (Turbidity method) against Escherichia coli, Bacillus subtilis, Staphylococcus aureus, Candida albicans and Aspergillus niger. The result showed that a methanol extract exhibited a significant activity against the bacterial strains when compared with Ciprofloxacin as a standard and aqueous extract was active against the fungal strains when compared to Fluoconazole. Hence this study proves that Plumeria acutifolia Syn Plumeria rubra possess antimicrobial activity.

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