Posted by admin on Dec 1, 2010 in |
Calotropis procera (Asclepiadaceae) is an erect, perennial shrub luxuriantly thriving in wastelands. It is commonly distributed in most parts of India and also distributed in Persia, tropical Africa and other tropical countries of the World. The aqueous extract of some parts have laxative property and beneficial in skin diseases, ulcers, enlargement of the spleen, abdominal glands, liver diseases, promotes digestive power and also useful in colics. The milky exudate is useful in skin diseases, tumour and ascitis. It is a very good purgative. Here an attempt has been taken to evaluate the antioxidant activity, CNS depressant activity and also antimicrobial activity of methanolic extract of fresh flowers of C. procera. In result, the methanolic flower extract showed a significant activity against DPPH free radicals and the IC50 value is 64.87µg/ml. On the other hand, CNS depressant activity of the extract was also observed by using In Vivo model. In antimicrobial activity five different fungal species were inhibited by this extract and from the above study the flowers extract showed...
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Posted by admin on Dec 1, 2010 in |
Antibiotics have a well-documented efficacy in the treatment of established infections and as prophylactic agents in medically compromised patients. Antibiotics use is suggested to be a major risk factor for development of antibiotic resistance. Resistance to antimicrobials is emerging at an alarming rate that has reduced treatment options for nearly every pathogen infecting humans. Many bacteria now display a variety of mechanisms that help protect them during antimicrobial exposure. These include production of β-lactamases and cephalosporinases, alterations in penicillin-binding proteins, multidrug efflux pumps, transferable resistance to vancomycin, and mutations in genes encoding DNA gyrase. This article gives information about how bacteria develop antibiotic resistance, new era of antimicrobial therapeutics and new strategies to eliminate antibiotic...
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Posted by admin on Sep 1, 2010 in |
Objective: To evaluate the antibacterial activity of ethanolic extract of roots of Vetiveria zizanioides. Method: Ethanolic extract of roots of Vetiveria Zizanioides was prepared. Standard cultures of Escherichia coli NCIM 2118; Bacillus subtilis NCIM 2063, P. aeurogenosa NCIM 2036 and Staphylococcus aureus NCIM 2079 were used for the study. The antibacterial tests used were the agar well plate method. Ciprofloxacin was used as the positive control. Results: EEVZ does not show any activity against B.subtilis. However, the activity was less than the standard Ciprofloxacin. The extract shows increasing inhibitory activity with increase in concentration (150-750µg). Conclusions: From our investigation, for screening ethanolic extract of Vetiveria zizanioides the results obtained confirmed therapeutic potency of some plants used in traditional medicine. The plants could be potential source of new antimicrobial...
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Posted by admin on Sep 1, 2010 in |
Medicinal plants are important source of potentially useful structures for the development of novel chemotherapeutic agents. The present study was aimed to evaluate the antifungal effect of partially purified C. gigantea latex extract on some human pathogenic fungi. Ethanolic extract of the latex were tested in vitro against fungi strains. The inhibitory effect was assessed by disc diffusion method. The minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) were also determined by serial dilution method. The ethanolic extract was subjected to qualitative phytochemical screening for the presence of bioactive ingredients. The ethanolic extract shows the presence of many biologically active molecules such as flavonoids, alkaloids, triterpenoids, steroids, saponins, phenols and glycosides. The latex extract shows significant zone of inhibition in dose dependent manner. The MIC and MFC values of latex extract against fungal strains varies from 1 mg to 8 mg and the results are comparable with Amphotericin B. From this study, we conclude that the latex extract possesses potent fungicidal activity which may be due to the...
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Posted by admin on Sep 1, 2010 in |
Synthesis of some aldehyde derivatives of 1, 4 di- hydro pyridine has been done. The entire synthesized compounds were characterized by UV, IR and 1HNMR spectroscopy. The anticonvulsant and antimicrobial activity were also evaluated. The present investigation deals with the synthesized compounds possessing good anticonvulsant, analgesic and antimicrobial activity. Synthesized compounds like PNH, PNA, ONF, MND, PAH posses significant anti convulsant activity. However, all the compounds showed analgesic activity less than the reference standard. Anti bacterial activities of the compounds were evaluated against staphylococcus aureus and the zone of inhibition was measured as the parameter of activity. Amikacin, the standard showed a zone of inhibition of 18 mm out of 8 synthesized compounds only one PNN (Ia) compound showed an equal activity when compared with standard. In which (ONF, PAN) showed considerable anti bacterial activity. The remaining four compounds PNM, MNC, MNA, PAK showed moderate antibacterial activity. Anti bacterial activity of the compounds were evaluated against E. Coli and the zone of inhibition was measured as the parameter of...
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