Posted by admin on Jan 1, 2013 in |
The seaweeds are economically valuable resources, used as food, fodder, fertilizer and medicine and thus useful to mankind in many ways. In the present study, Kappaphycus alvarezii, a marine alga, has been analysed for the presence of bioactive products using three solvent extracts. Antimicrobial activity was also done using the same extracts of seaweed. The results revealed that the selected seaweed has active secondary metabolites and also exhibited antimicrobial activity, mainly in the methanolic extract of Kappaphycus...
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Posted by admin on Jan 1, 2013 in |
Since plants are used as therapeutic agents, the present study was conducted to evaluate the antibacterial activities of methonolic extracts of different components of Citrus hystrix and Citrus maxima (Red and White) fruit. Studies on the antibacterial activity of methanolic extracts of leaf, peel, and pulp of Citrus hystrix and Citrus maxima (Red and White) fruitwas conducted using agar disc diffusion method. The microorganisms used include Staphylococcus aureus (MTCC 3160), Salmonella typhi (MTCC 3215), Escherichia coli (MTCC 40), Pseudomonas aeruginosa (MTCC 424), Klebsiella pneumoniae (MTCC 3384). The maximum activity was observed against all organisms except Pseudomonas aeruginosa and Klebsiella pneumoniae. The minimum inhibitory concentration ranged between 12.5mg/mL and 200mg/mL depending on microorganism and various extract. Citrus hystrix and Citrus maxima (Red and White) fruit were observed to have antibacterial activity and can be used for medicinal...
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Posted by admin on Jan 1, 2013 in |
The antimicrobial activity as well as phytochemical screening of the hexane, acetone, methanol and water extracts of Clematis brachiata Thunb (Ranunculaceae) leaves was investigated. The agar dilution assay method was used for the evaluation of the antimicrobial activity of extracts against 10 bacteria and four fungal species. The phytochemical screenings were performed by using the standard procedures. The acetone and methanol extracts were active against the 10 bacteria strains with MIC ranging between 1.0 and 3.0 mg/ml, whereas the water extract was only active against two Gram-negative bacterial strains at 10.0 mg/ml. There was no activity from the hexane extract. While there was complete growth inhibition by the acetone and methanol extracts against all the fungal species at 10 mg/ml, the hexane extract was active against all the fungal species except Candida albicans at 10 mg/ml. In contrast, the water extract did not show any activity against the fungal species. Phytochemical screening revealed the presence of phenols, tannin, saponin, flavonoids, terpenoids and glycosidic compounds and could be responsible for...
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Posted by admin on Dec 1, 2012 in |
The antibacterial and antifungal activity of methanolic extract of Asteracantha longifolia Nees has been evaluated against 4 Gram positive bacteria, 7 Gram negative bacteria and 7 fungi. Ciprofloxacin and fluconazole used as standards for bacteria and fungi, respectively. The extract showed varying degrees of antimicrobial activity with zone of inhibition ranging from 15.0 to 26.0 mm. A. longifolia demonstrated significant zone of inhibition against all experimental bacteria, namely, B. cereus, B. megaterium, B. subtilis, S. aureus, E. coli, P. aeruginosa, S. paratyphi, S. typhi, Sh. dysenteriae, Sh. Sonnei and V. cholerae and four fungi, namely, A. niger, B. dermatitidis, Microsporum spp. and Trichophyton spp. The MICs of the plant extract was found to be 31.25 μg/ml against B. cereus, S. typhi, Sh. Sonnei, V. cholerae, A. niger and B. dermatitidis. In the brine shrimp lethality bioassay, the LC50 and LC90 of A. longifolia were found to be 6.1 & 12.2 μg/ml,...
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Posted by admin on Dec 1, 2012 in |
In present study, a series of new synthesized condensed pyrazole derivatives 1a-f have evaluated in vitro for their antioxidant activity, reducing power ability, antibacterial activity against Gram-positive and Gram-negative organisms and antifungal activity against different organisms. Minimum inhibitory concentration against the bacterial and fungal strains was determined. The study provides the structural impact of the compounds for their biological...
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