Posted by admin on Jan 31, 2015 in |
The aim of this investigation was to develop a solid microemulsion of Glimepiride for enhancing its solubility, and its dissolution rate. For this purpose, solubility of Glimepiride was determined in various vehicles. Oil, Surfactant and Cosurfactant were selected based on the solubility. Pseudo-ternary phase diagrams were constructed to identify the microemulsion existing zone. The optimized microemulsion formulation was characterized for its refractive index, % transmittance, pH, viscosity, drug content and particle size. Particle size of the optimized microemulsion formulation was found to be 38.83 nm. Various adsorbents were incorporated in the optimised liquid microemulsion to get solid microemulsion. The solid microemulsion from Aerosil 200 was optimized because of very low amount (1:1) of Aerosil was incorporated in microemulsion as compare to other adsorbent. The prepared solid microemulsions were subjected to characterisation for angle of repose, bulk density, tapped density, Hausner’s Ratio, Carr’s index, drug content, in-vitro drug release study and stability studies. The solid microemulsion with Aerosil 200 showed excellent free flowing property and % compresabilty. From in-vitro drug...
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Posted by admin on Jan 31, 2015 in |
The humans head lice are a nuisance for millions of people worldwide with high prevalence in children. Head lice have been treated by methods that include the physical removal of lice, various domestic treatments and conventional insecticides. None of these methods render complete protection and there is clear evidence for the evolution of resistance and cross-resistance to conventional insecticides. Non-toxic alternative options are hence needed for head lice treatment or prevention and natural products from plants, especially essential oils (EOs) are good for safer control agents that may provide good anti-lice activity and low levels of evolved resistance. A few Essential oils have been tested as repellents with promissory results, although often in vitro tests and clinical trials produce contradictory results. The use of pyrethroids to control head louse infestations have suffered considerable loss of efficacy due to the development of resistance. In the last past few years, several new alternative products to synthetic pyrethroids have been developed and are sold in the market against head lice. The present...
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Posted by admin on Jan 31, 2015 in |
The present investigation is concerned with synthesis of new substituted benzoxazolinone derivatives (1-18) with the objective of discovering novel and potent antimicrobial agents. The structure of all the synthesized compounds were elucidated by elemental (C, H, N) and spectral (IR, 1HNMR and mass) analysis. The purity of the synthesized compounds was checked by thin layer chromatography (TLC). The obtained compounds were screened for their antibacterial as well as antifungal activities and compared with reference drugs ciprofloxacin and fluconazole respectively. All the newly synthesized compounds were screened for their antibacterial activity against S. aureus, E. coli, K. pneumoniae and antifungal activity against A. niger, C. albicans. Compounds 13 and 18 were found to be the most potent members of the present series; they showed maxium antibacterial and antifungal properties much better than the standard drug. The compounds 15, 16 and 17 exhibited good antibacterial activity as well as while antifungal...
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Posted by admin on Jan 31, 2015 in |
The urease (E.C.3.5.1.5) catalyzes the hydrolysis of urea to ammonia and is commonly used in clinical laboratories for the estimation of urea in biological fluids. The urease enzyme of sword bean (Canavalia gladiata) has been purified in single-step by affinity chromatography using epoxy activated agarose containing urea as the affinity ligand. The yield of the purified enzyme was about 83% with specific activity of about 495 U/mg of protein with 14-fold purification. The final preparation had a transparent appearance with free ammonia content less than 0.01 µg/unit and was stable for 15 months at 4-8°C. The enzyme acted optimally at pH 7.5 and 25°C. Thermal stability studies indicated that at pH 7.5 no loss of enzyme activities were recorded up to 35°C for 30 mins. SDS−polyacrylamide gel electrophoretic analysis showed that the purified enzyme was apparently homogeneous and had a molecular weight of approximately 87 kDa. Single band was observed in both native and...
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Posted by admin on Jan 31, 2015 in |
The purpose of this study was to evaluate antimicrobial activity of Bursera penicillata leaf extract against human infected bacteria. Antimicrobial activity of Petrolium ether, Methanolic and Aqueous extracts from leaves of Bursera penicillata were tested against pathogenic bacteria Staphylococcus aureus, Escherichia coli, Proteus vulgaris, Klebsiella pneumoniae, Staphylococcus saprophyticus, Enterococcus faecalis and Enterobacter cloacae using Agar well diffusion method. Solvent extracts from the leaves of the plant shown a considerable antimicrobial activity against most tested microorganisms. The most active extract was Methanolic extract from the leaf against Klebsiella pneumoniae and significantly inhibited the bacterial activity. Minimum inhibitory concentration for aqueous and methanolic extracts of leaves ranged from 5.0–20.0 mg/ml and ethyl acetate and petroleum ether leaf extracts ranged from 25.0µg-55.0 µg and 45.0-85 µg/ml. It further reflects a hope for the development of many more novel chemotherapeutic agents or templates from such plants which in future may serve for the production of synthetically improved therapeutic...
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