Posted by admin on Nov 1, 2014 in |
Antimicrobial effects of different extracts of lichens were evaluated in this study. Acetone extract of Heterodermia boryi have shown maximum inhibitory activity against Escherichia coli (22mm) followed by Staphylococcus aureus (21mm)and Pseudomonas fluorescenes (20 mm). Among fungi, diethyl ether extract gave desirable sensitivity pattern against Pestalotia foedans was very sensitive (21mm) followed by Paeciliomyces variotii (20mm). Most of the extracts of Sticta weigelii were found to be inactive against Fusarium oxysporum. Klebsiella pneumoniae was found to most resistant bacteria against Sticta weigelii. Among the tested microbial strains, Pseudomonas fluorescens was mostly inhibited (26 mm) by chloroform extract of Dermatocarpon vellereum. Serratia marcescens was found to be the most resistant strain against the lichen, but was effectively inhibited only by ethanolic extract of Dermatocarpon vellereum (20 mm). Hexane extract D. vellereum have shown maximum inhibitory activity against Staphylococcus aureus (23...
Read More
Posted by admin on Nov 1, 2014 in |
A simple, rapid and precise stability indicating reverse phase high performance liquid chromatographic method has been developed for simultaneous estimation of Miglitol and Metformine Hydrochloride in their tablet dosage form. Chromatography was performed on a Phenomenex ODS C18 (250 X 4.6 mm) 5mm column using Water: Methanol (50:50, v/v) pH: 4 mixture as a mobile phase. The detection was carried out at 235 nm with a flow rate of 1.0 mL/min. The retention times were 4.807 and 3.273 minutes for Miglitol and Metformine Hydrochloride, respectively. The linearity of the method was excellent over a concentration range 2.5 to 7.5μg/mL for Miglitol and 25 to 75μg/mL for Metformine Hydrochloride. The correlation coefficient was 0.997 and 0.999 for Miglitol and Metformine Hydrochloride, respectively. The limit of detection was 0.6607μg/mL and 1.740μg/mL for Miglitol and Metformine Hydrochloride, respectively. The limit of quantitation was 2.0021μg/mL and 5.2736μg/mL for Miglitol and Metformine Hydrochloride, respectively. The relative standard deviation values for repeatability, intraday precision and interday precision studies were less than 2 % and %...
Read More
Posted by admin on Nov 1, 2014 in |
A simple, rapid and precise reverse phase high performance liquid chromatographic method has been developed for simultaneous estimation of Cinnarizine and Dimenhydrinate in Tablet Dosage Form. Chromatography was performed on a PhenomenexPartisil ODS C18 (250 X 4.6 mm) 5mm column using Acetonitrile: Water (90:10) as a mobile phase. The detection of the synthetic mixture was carried out at 265 nm with a flow rate of 0.7 ml/min. The retention times were 4.3 and 5.8 minutes for Cinnarizine and Dimenhydrinate, respectively. Proposed method was validated as per ICH guidelines for linearity, accuracy, precision; specificity and robustness for estimation of Cinnarizine and Dimenhydrinate in Tablet Dosage Form and results were found to be satisfactory. The linearity of the method was excellent over a concentration range 20-100μg/ml for Cinnarizine and 40-200μg/ml for Dimenhydrinate. The correlation coefficient was 0.996 and 0.992 for Cinnarizine and Dimenhydrinate, respectively. The limit of detection was 1.62μg/mL and 2.62μg/mL for Cinnarizine and Dimenhydrinate, respectively. The limit of quantitation was 4.93μg/mL and 7.95μg/ml for Cinnarizine and Dimenhydrinate, respectively. The...
Read More
Posted by admin on Nov 1, 2014 in |
The author selected and developed a new simple, sensitive and reproducible spectrofluorimetric method and validated for the determination of Memantine Hydrochloride in bulk as well as pharmaceutical formulations depending on condensation of Memantine hydrochloride with 1, 2 – Naphthoquinone -4- sulphonate (NQS) in an alkaline medium to become a product with orange color. The spectrofluorimetric method involved reduction of the product with potassium borohydrate and the later measurements of fluorescent formed lessen the NQS product after excitation at 295 nm and emission wavelength at 385 nm for the spectrofluorimetric method under optimum conditions, linear relationship with best correlation coefficient 0.9999 and the linearity was detected in between the range of 0.25-1.25 µg/mL. The mean accuracy was found to be 99.57 % to 99.66 %. The intraday and interday precision was found to be 0.14-0.16 % and 0.13-0.15% respectively. The limit of detection was found to be 0.0090µg/mL and the limit of quantification was 0.0270µg/mL. Therefore this newly recommended spectrofluorimetric method is most suitable for estimation of Memantine and observed...
Read More
Posted by admin on Nov 1, 2014 in |
Averrhoa carambola -L. (Oxalidaceae) has great importance in the Indian traditional system of medicine for controlling diabetes and piles: the combined extracts of leaves as well as fruits of A. carambola are used for the treatment of jaundice, gastric problems and other chronic conditions as well as in food supplements.The objective underlying this experiment is to determine the safety profile of the plant used on a daily basis as well as for prolonged exposure to subjects. In this study, we analyzed the influence of ethanol extract of Averrhoa carambola at a dose level of 2000 mg kg-1 bw on the acute and with a graded dose levels from 250, 500, 1000 and 2000 mg kg-1 bw for 28-day repeated-dose toxicity test in Wistar rats.The analysis revealed that the repeated oral dose of Averrhoa carambola L. at a dose level upto 2000 mg kg-1 bw for 28 days did not induce any biochemical, hematological, morphological, histopathological signs of toxicity. High dose of Averrhoa carambola L. extract did not inhibit the...
Read More
