00000ctm a22000007a 4500 UP-1685523046125413270 Buklod 20230503092606.0 m |o d | ta 071031s xx d r |||| u| (iLib)UPMNL-00000054579 UPM PHARM ​​eng LG 993.5 1994 P5 A33 Agbayani, Ma. Lynn Rachelle J. Studies on the antimicrobial properties of the volatile oil and the non-polar components from the leaves of Psidium guajava Linne (F. Myrtaceae) Ma. Lynn Rachelle J. Agbayani ; adviser, Ileana R. Cruz. Manila Department of Pharmaceutical Chemistry, College of Pharmacy, University of the Philippines 1994. 28 leaves ​Thesis (Bachelor of Science in Pharmacy)--University of the Philippines, October 1994. Yes - available to the general public. This research is concerned primarily with the anti-microbial properties of the volatile oil and the non-polar components of the leaves of guava, Psidium guajava Linne (Fam. Myrtaceae). The volatile oil, which has a yield of 0.4246%, exhibits an anti-microbial effect on the gram-positive organisms Bacillus subtilis and Staphylococcus aureus. The non-polar or hexane extract, at a concentration of 0.2 mg/ml, inhibits the growth of Bacillus subtilis, Staphylococcus aureus, and Escherichia coli. A combination of the oil and the extract, on the other hand, inhibits Escherichia coli and Staphylococcus aureus only. Fractionation of the hexane extract by Liquid Chromatography produces two fractions effective against Bacillus subtilis, one fraction effective for Escherichia coli and two fractions which inhibit Staphylococcus aureus. Essences and essential oils. Guava. Cruz, Ileana R. FI UP UPMNL PHARM LG 993.5 1994 P5 A33 Thesis