Posted by admin on Jul 2, 2014 in |
This work investigates the potential of Partial Least Square (PLS) regression using two vibrational spectroscopies as mid infrared (MIR) and near infrared (NIR) spectroscopies for the quantification of molsidomin in tablets. Two very simple, rapid, inexpensive and green strategies were applied for this determination. Powder blends containing molsidomin and excipients were prepared. The excipients correspond to those in Inverter® tablets. Two experimental design approaches were used in generating 9-levels % calibration and validation samples sets. Fourier transforms of mid-infrared (MIR) and near-infrared (NIR) spectra were measured by transmission and diffuse reflection techniques respectively. The calibration models were generated by PLS models without spectral treatment and were used to predict the drug content in the powder blends made for validation models and for commercial tablets. The mean percentages of recoveries for the analysis of molsidomin in generic Inverter® 4 mg tablet are 101.5 and 99.6 % for FT-MIR and FT-NIR...
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Posted by admin on Jul 1, 2014 in |
A Cyclodextrin glycosyltransferase (CGTase) producer was isolated from soil obtained from rice fields using alkaline Horikoshi II medium. The alkaliphile was characterized microscopically, biochemically and confirmed by 16S rRNA analysis as Bacillus oshimensis. CGTase production is dependent on the strain, medium composition and culture conditions; hence media optimization studies were carried out in shake flask using the statistical method. Tapioca starch was used as carbon source and a combination of yeast extract and peptone were used as nitrogen source in the media, along with MgSO4.7H2O, K2HPO4 and Na2CO3. A 33 factorial design using Taguchi method has been chosen to elucidate the combined effect of these variables. The parameters were optimized by changing three independent variables, with fixed concentration of mineral sources. The optimal media composition for CGTase production was found to be comprised of Tapioca starch 1%; peptone 0.5%; yeast extract 0.5% and 0.14% Magnesium Sulphate, 0.2% ammonium dihydrogen phosphate according to the factorial designing of the experiment and was used for further studies. The CGTase activity was found...
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Posted by admin on Jul 1, 2014 in |
The formation of free hydroxyl radical (˙OH) in oxygen transfers at GCE and the reaction between the electrochemically produced ˙OH and salicylic acid (SA) is studied by cyclic voltammetry method. Experiments showed that ˙OH is formed in the potential range of 1.0-1.4V corresponding to the anodic discharge of H2O at the GCE. The interaction of Cu2+, Hg2+, Cd2+, Mn2+ ions on the hydroxylation reaction is studied. The interaction of these metal ions is explained by using derived parameters such as surface coverage, formal potential, transfer co-efficient number and rate constant. The diffusion coefficient values for electroactive species on GCE is determined by using chronoamperomety and chronocoulometry techniques. It shows that Mn-SA has higher diffusion coefficient value as compared to the other systems. Multisweep cycle experiment on GCE surface provided mechanism for the reaction of hydroxylation on salicylic acid. This experiment suggests that metal ions first undergo Fenton-type hydroxylation reaction on salicylic acid and then undergo complexation reaction with 2, 5-dihydroxybenzoic...
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Posted by admin on Jul 1, 2014 in |
Objective: The present study was aimed to evaluate the antidiabetic activity of 1-(4-(Dimethylamino) benzylidene)-5-(2-oxoindolin-3-ylidene) thiocarbohydrazone i.e. a novel Isatin derivative diabetic rats. Methods: The antidiabetic activity of Isatin derivative was evaluated against alloxaninduced diabetes in rats. Diabetes in rats was induced by administration of alloxan monohydrate (120mg/kg, b.w, p.o) as a single dose. The diabetic rats were treated with single dose of test compound at a dose of 50 and 100mg/kg. Blood samples were collected at different intervals and analyzed for fasting glucose levels, total cholesterol (TC), triglycerides (TG) and High density cholesterol (HDL-C) levels using respective kits. Results: Treatment with test compound with a single dose of 50 and 100mg/kg to diabetic rats showed a significant dose dependant (p<0.01) reduction of fasting blood glucose levels along with mild change of lipid profiles (TC, TG, HDL-C) indicating the antidiabetic activity of test compound. Conclusion: The study results confirmed the antidiabetic activity of 1-(4-(Dimethylamino)benzylidene)-5-(2-oxoindolin-3-ylidene) thiocarbohydrazone in...
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Posted by admin on Jul 1, 2014 in |
In this study, the fatty acid content, antioxidant activities and antimicrobial potential of oil obtained from the root of Hippocratea africana was investigated. Results showed that the oil was characterized by oleic acid (65.73%), palmitic acid (20.34%) and linoleic acid (6.90%) as the most abundant fatty acids with a oleic acid/linoleic acid ratio of 9.52. The oil possessed potent antioxidant activity (IC50 = 75.00µg/ml) and exhibited significant metal chelating potentials (EC50= 7.4mg/ml). It also showed notable antimicrobial activity against the tested human pathogens. MIC values indicated bactericidal activity against S. aureus (MIC =0.05mg/ml), S. pyogenes (MIC =0.17mg/ml) and fungicidal activity against C. albican (MIC =0.06mg/ml). These results support to some extent, the medicinal potential of Hippocratea africana...
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