Posted by admin on Apr 1, 2014 in |
A new simple, rapid, accurate, precise and sensitive RP-HPLC method was developed for the estimation of sildenafil citrate in bulk and pharmaceutical dosage form. The separation of sildenafil citrate was achieved on a Phenomenex C18 Column (150 X 4.6 mm i.d, 5µ particle size) with a mobile phase consisting of methanol and Buffer (50:50 % v/v). The flow rate was 1.5 ml/min and photodiode array detection at 290nm. The retention time of Sildenafil citrate was found to be 4.842 min. Calibration curve was found to be linear in the concentration range of 70 – 210 µg/ml and the correlation coefficient value was found to be (R2) 0.9998. LOD and LOQ were 2.361ng/ml and 7.156ng/ml respectively. The RSD value of Precision and recovery studies were less than 2 %, indicated that the method was precise and...
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Posted by admin on Apr 1, 2014 in |
This work has been undertaken to study the antimicrobial efficiency of Hexane, Ethyl acetate, Ethanolic extracts of herbal plants (Anthocephalus cadamba, Allium sativum, Origanum vulgare, Ocimum sanctum) against human pathogens like Staphylococcus aureus (MTCC-3160), Escherichia coli (MTCC-1652) and fungi Aspergillus niger (MTCC-282) by using agar well diffusion method. All the plants showed significant activity against all pathogens, but the alcoholic extract of Ocimum sanctum showed maximum zone of inhibition and minimum inhibitory concentration against all the pathogens. The minimum zone of inhibition and comparatively greater inhibitory concentration were determined in hexane and ethanolic extract. The Spectrum activity of alcoholic extracts of these plants could be a possible source to obtain new and effective herbal medicines to treat various infectious...
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Posted by admin on Apr 1, 2014 in |
Tridax procumbens (Linn.) is an important medicinal plant belonging to the family Asteraceae. It is known for a number of pharmacological activities like antidiabetic, anticancer, anti-inflammatory, wound healing, hepatoprotective and antioxidant activity.Flavonoid “Quercetin” was isolated from the flowers of this plant. Dried flowers were Soxhlet with petroleum ether, chloroform, and methanol successively. The methanolic fraction so obtained was successively extracted with petroleum ether, diethyl ether and ethyl acetate. The ethyl acetate fraction was hydrolyzed with 7% H2SO4 and extracted with ethyl acetate to obtain crude Quercetin. The crude product was recrystallized with dilute ethanol to get pure Quercetin. The purified material was subjected to various chromatographic and spectral techniques such as UV, IR, HPTLC, HPLC, NMR etc. and was identified as “Quercetin”. This study is also of practical importance because quercetin is an important constituent of Tridax procumbens and it has many uses such as in cancer, diabetes, inflammation, & in viral infections...
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Posted by admin on Apr 1, 2014 in |
The traditional Indian system of medicine (Ayurveda) describes different modalities involved in the prevention and treatment of disease and stresses upon the role of diet, life style and drugs as cornerstones of therapy. Medicinal plant products are known to modify different aspects of human physiology and exert an alleviating influence on several pathophysiological states, and concepts of immunity and immune-modulation can be traced back several hundred years to the history of medicine. However, it is only in recent years that the scientific concept of immune modulation has been forwarded, and it now appears that some of the beneficial effects of Indian medicinal plants, proposed in Ayurveda by Charaka and Sushruta Samhita, may be due to these “immunomodulatory” effects. Several research groups have worked on the scientific basis of such immunomodulatory effects of plant products, and as a result, considerable data has accrued. The present review summarizes some of these experimental data in an attempt to justify some of their beneficial effects in health and disease, and also to provide...
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Posted by admin on Apr 1, 2014 in |
Interferons were the first cytokines to be used therapeutically as naturally derived and as recombinant forms in humans. Their broad biological activity has resulted in clinical benefits in diseases ranging from infectious (such as viral hepatitis), autoimmune (in particular multiple sclerosis) to neoplastic (lymphomas and carcinomas). Since Interferons enhance the immune system in many ways, they are used for many diseases that involve the immune system. For example; Interferon alfa-2a (Roferon-A) is FDA-approved to treat hairy cell leukemia, AIDS-related Kaposi’s sarcoma, and chronic myelogenous leukemia. Interferon alfa-2b is approved for the treatment of hairy cell leukemia, malignant melanoma, condylomata acuminata, AIDS-related Kaposi’s sarcoma chronic hepatitis C, and chronic hepatitis B. Ribavirin combined with interferon alfa-2b, interferon alfacon-1 (Infergen), pegylated interferon alfa-2b, or pegylated interferon alpha-2a, all are approved for the treatment of chronic hepatitis C. Interferon beta-1b (Betaseron) and interferon beta-1a (Avonex) are approved for the treatment of multiple sclerosis. Interferon alfa-n3 (Alferon-N) is approved for the treatment of genital and perianal warts caused by human papillomavirus (HPV). Interferon...
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