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Document Type |
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Thesis |
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Document Title |
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Comparative study of antifungal and antibacterial activities of some plant extracts دراسة مقارنة على النشاط المضاد فطرى والمضاد بكتيرى لبعض المستخلصات النباتية |
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Subject |
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Faculty of Sciences |
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Document Language |
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Arabic |
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Abstract |
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In this research, methanolic extracts of the leaves of five plant species (Anethum graveolens, Calotropis procera, Cymbopogon citratus, Juniperus oxycedrus and Moringa oleifera) were tested for their antibacterial and antifungal activities against four bacterial species (Bacillus cereus, Escherichia coli, Micrococcus varians and Staphylococcus aureus) and four fungal species (Alternaria tenuis, Aspergillus niger, Fusarium oxysporum and Penicillium coryophilum). The methanol extract of J. oxycedrus leaves was the most efficient plant extract, which cause the maximum significant inhibition in the growth of all tested eight microbial species reaching to the highest inhibition (8.5 cm inhibition zone) in A. tenuis. On the other hand, two tested plant extracts (C. citratus and M. oleifera) were the least effective plant species. The treatment of the eight tested microbial species with J. oxycedrus leaf extract was more effective in decreasing the protein contents for all tested bacterial and fungal species reaching to the minimum value (0.33 µg/ml) in E. coli. All tested plant extracts induced the tested bacterial and fungal species to produce more sugars in the culture filtrates, where the maximum accumulation of sugars (2.00 µg/ml) was showed by the treatment of M. varians with the extract of J. oxycedrus. The productivity of amylase and lactase enzymes by the tested bacterial and fungal species were inhibited, reaching to the minimum activities with addition of the most efficient plant extract (J. oxycedrus). The maximum antioxidant activity (97.46%) was showed with addition of the highest concentration (1000 µg/ml) of J. oxycedrus extract, while the lowest antioxidant activity (95.66%) was recorded with 1000 µg/ml of C. citratus leaf extract. |
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Supervisor |
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Dr. Neveen Saleh Geweely |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1431 AH
2010 AD |
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Co-Supervisor |
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Dr. Lubna Saleh Nawar |
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Added Date |
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Wednesday, July 21, 2010 |
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Researchers
| إيناس أحمد المنزلاوي | AL-Manzlawi, Enas Ahmad | Researcher | Master | |
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