Posted by admin on Jun 30, 2016 in |
Colorants are mainly used to impart a distinctive appearance to the pharmaceutical dosage forms. The present study was carried out to develop aluminium lake color of a dye obtained from black carrot using different adsorbents (Aluminium oxide or aluminium hydroxide) in different ratio by simply mixing them to get dye adsorbed onto the surface of adsorbent. Adsorption experiment was carried out for 60 minutes. Aluminium oxide at a concentration level of 30% w/v found to be the choice of adsorbent after optimization because maximum adsorption of dye from reaction mixture after 60 minutes and maximum % yield. After optimization of adsorbent the effect of pH and temperature also studied by formulating lake by varying these two parameters. It was observed that a higher temperature (50oC) and a lower pH (3) favor the adsorption. The lake then characterized for various physicochemical properties like angle of repose, Carr’s index, hausner’s ratio, loss on drying, particle size and limit test for heavy metals. The lake was found to follow pseudo second order...
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Posted by admin on Jun 30, 2016 in |
This paper describes simple, sensitive, accurate, rapid, precise and economical Chemometrics assisted and RP-HPLC methods for simultaneous estimation of Linezolid(LNZ) and Cefuroxime axetil(CEF) in bulk and tablet. Chemometrics offers a useful approach for an estimation of combined dosage form. The measurement carried out at wavelength 240 to 290nm with interval of 4nm for Linezolid and Cefuroxime axetil respectively. Chemometrics method were found to be linear (R2=0.999) for all four methods CLS, ILS, PLS and PCR for LNZ and CEF respectively. HPLC method by using mobile phase Acetonitrile: water 65:35 with Thermo Synchronies C-18 (250mm x 4.6mm, 5μm) flow rate 0.8ml/min and detection wavelength 267nm. Retention time was found to be 3.573 min for LNZ and 4.273 min for CEF. HPLC method was found to be linear (R2=0.999) for 6-30µg/ml for LNZ and 5-25µg/ml for CEF respectively. The applied methods Chemometrics and RP-HPLC were found to be successful for simultaneous estimation of LNZ and CEF in marketed dosage...
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Posted by admin on Jun 30, 2016 in |
Objective: Present study was aimed to evaluate the total phenolic, flavonoid content and in vitro antioxidant activity of petroleum ether, benzene, ethyl acetate, methanol and ethanol extracts of whole plant of Catharanthus pusillus. Methods: Antioxidant activity have been tested using various antioxidant model systems viz., DPPH, hydroxyl, superoxide, ABTS and reducing power. Results: Methanol extract of Catharanthus pusillus is found to possess higher DPPH, hydroxyl, superoxide radical scavenging activity, while ethyl acetate extract is found to possess higher ABTS radical cation scavenging activity. Methanol extract of whole plant of Catharanthus pusillus shows the highest reducing ability. Conclusion: The study indicates the significant free radical scavenging potential of Catharanthus pusillus whole plant which can be experimented for the treatment of various free radicals mediated...
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Posted by admin on Jun 30, 2016 in |
Ayurveda is the primeval complete serving system in medical field. However, one of the barriers in the acceptance of the Ayurvedic formulation is the paucity of standard quality control outline. World health organization (WHO) in 1999 has given a detail procedure for the standardization of herbal drugs comprising of a single content but not for standardization of polyherbal formulations. Mahashankhvati is official in Ayurvedic Formulary of India and is prescribed for treatment of haemorrhoids, malabsorption syndrome, dyspepsia and indigestion. In the proposed work, attempt has been made for standardization of Mahashankh Vati by developing chromatographic method. Piperine from Piper longum and Piper nigrum, Umbelliferone from Ferula asafoetida and Gallic acid from Terminaliachebula present in formulation were selected as marker compounds. A new, rapid, simple, precise, selective HPTLC method was developed for marketed preparation of Mahashankhvati. The separation was performed on TLC aluminium plates precoated with silica gel 60 F254, using toluene: ethyl acetate: methanol: formic acid (7:2:2.5:0.5 v/v/v/v) as mobile phase. The densitometric analysis was carried out at the...
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Posted by admin on Jun 30, 2016 in |
Protein kinases are key players in cellular signal transduction and perturbations in its activity leads to cancer. Targeting these seems to be sufficient to provoke apoptotic response, thus limiting the process of tumorogenesis. Among kinase inhibitors, imatinib has demonstrated magnificent clinical efficacy. But patients with advanced disease harbor faces resistance. Currently there is requisite of making strategies to overcome resistance and adverse effects in order to provide maximum benefit to the patients. Present work was to develop a new analog of Imatinib with the objective to provide a molecule with best combination of properties, safe and affordable drug. For this purpose Imatinib was taken as a lead molecule which has shown a successful positive bioactivity score of 0.59 for kinase receptor predicted using Molinspiration software. Imatinib was optimized using the concept of Bioisosteric replacement, in order to achieving better affinity towards protein kinase receptor. Newly designed analogs were found in compliance with Lipinski rule of five recommendations for new chemical entity to have good oral bioavailability with no violations....
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