Posted by admin on Sep 1, 2014 in |
Simple and sensitive spectrophotometric Method (A) and spectrofluorimetric Method (B) were described for the analysis of oxcarbazepine. The proposed methods were based on the oxidation of the drug with cerium (IV) ion in acidic medium with subsequent measurement of either the decrease in absorbance at 321 nm or the fluorescence intensity of the produced cerous (III) ion at 363 nm emission after excitation at 256 nm. All variables that affect the decrease in absorbance or the fluorescence intensity such as the concentration of cerium (IV), reaction time and temperature, and the diluting solvent were studied and optimized. Beer’s low was obeyed in the range of 0.25 – 2.5 µg ml-1 and 80 – 720 ng ml-1. LOD and LOQ were found to be 0.01 and 0.241 µg ml-1 and 17.8 and 59.33 ng ml-1 for the method (A) and method (B), respectively. These methods were validated and successfully applied to the determination of oxcarbazepine tablets with an average percent recovery ± RSD% of 100.32 ± 0.283 and 100.03 ±...
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Posted by admin on Sep 1, 2014 in |
Solvent used for preparing binder solution in a wet granulation process is one of the major factors which dictate the granule properties. Aim of our current research was to understand the effect of solvents on flow properties of Microcrystalline Cellulose granules prepared using Hydroxypropyl Methylcellulose as a binder by using rheological tools and subsequently studying the effect of relative humidity on the rheology of dried granules. Granules were prepared by using 2.5% w/w binder solution in water and water: ethanol mixture (20:80 v/v). Prepared granules were dried, sieved, and further analyzed. Effect of relative humidity on the flowability of dried granules was studied at 22%, 52%, 75% RH at room temperature for 48 hours. Modulated Differential Scanning Calorimetry and Powder rheometer were used to study the thermal and flow properties of wet, dried, and humidity exposed granules. Results show that the hydro-alcoholic batches show greater resistance to flow in wet granule stage. But, its dried granules display good flow characteristics as evident from Basic flowability energy values. Bulk density...
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Posted by admin on Sep 1, 2014 in |
Objective: To investigate the cardioprotective effect of methanolic extract of Gardenia gummifera root (MEGG) on Isoproterenol (ISO) induced myocardial infarction (MI) in rats. Methods: LCMS analysis of MEGG was done for the identification of cardioprotective constituents. Myocardial infarction was induced by the subcutaneous injection of ISO (6mg/100g body weight) at an interval of 24 h for 2 days. MEGG (125 and 250 mg/kg, p.o) was given to rats once daily for 45 days before the ISO challenge. The myocardial damage was assessed by quantifying the serum levels of cardiac marker enzymes (LDH, AST, ALT, CK-MB), serum iron and iron binding capacity, uric acid, and ceruloplasmin. Antioxidants such as catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR), glutathione-S-transferase (GST) and reduced glutathione (GSH) were altered in MI rats. The level of lipid peroxidation was measured as malondialdehyde (MDA), triphenyl tetrazolium chloride (TTC) test, and quantification of histopathological changes also supported the dose-dependent protective effects of MEGG. Results: MEGG significantly (p ≤ 0.05) protected the above-mentioned parameters from falling from normal...
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Posted by admin on Sep 1, 2014 in |
The present study is a simple rapid, sensitive, selective and reproducible RP-HPLC method has been developed for the estimation of Triclosan in dental formulations. In present work a simple, sensitive and specific method (RP-HPLC assay, stability indicating RP-HPLC) has been developed by using a phenomenex, BDS C18, column having 5 µm particle size and 150 mm × 4.6 mm in length and gradient mode, with mobile phase containing acetic acid buffer (pH 2.5, adjusted with formic acid) and acetonitrile in the ratio of 30:70. The flow rate was 1.2 mL/min and effluents were monitored by PDA detector at 281nm. Injection volume was 20 µL. The method is linear (1-50 µg/mL). The regression equation was y = 7311x-2307 (r2 = 0.997). The method was validated for linearity, precision, accuracy, ruggedness, and forced degradation studies were performed. Estimation of triclosan was done in 3 dental formulations. Recoveries from formulations were between 98% and 102%. Limit of detection and limit of quantification was 0.101433 and 0.3333µg/mL, respectively. All the validation parameters are...
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Posted by admin on Sep 1, 2014 in |
Subcutaneous implantation of the drug is known to be the first medical approach aiming to achieve prolonged and continuous administration of drugs. The purpose of the research was to achieve sustained delivery of Tramadol Hydrochloride from biodegradable Gelatin-Sodium Alginate polymeric implant. Implants were prepared by using Gelatin-Sodium Alginate polymer in two ratios 70:30 & 80:20% w/w by heating and congealing method and then exposed to formaldehyde vapor for different periods (3, 6, 12 & 24 h) for hardening. Implants formulated with 80:20 Gelatin-Sodium Alginate ratio and hardened for 12 h were chosen for further studies based on drug loading and release performance. Effects of different excipients were studied on drug loading efficiency and drug release profile. Morphology of implant matrices, as studied by SEM, supported the experimental results. The release kinetics of drug was evaluated by fitting the data in four different kinetic models, namely, Zero order, First order, Higuchi and Korsmeyer‐Peppas. Implants were found to follow Korsmeyer Peppas Model the best in most cases. Good correlations were obtained...
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