Posted by admin on Apr 30, 2017 in |
The prime aim and object of present investigation is to develop and validate a novel, precise, accurate, specific, rapid and economic stability- indicating isocratic reverse phase liquid chromatography method for the quantitative simultaneous estimation of Tenofovir disoproxil fumarate and Emtricitabine in bulk and marketed formulations. Estimation of drugs in this combination was achieved with a C18 column [Agilent TC-C18 (2) column. 5mm, 4.6´250 mm]kept at ambient temperature, using mobile phase of composition Methanol and phosphate buffer (30:70 v/v, pH 4).The flow rate was 1.0 ml/min and the effluents were monitored at 261 nm, using variable wavelength UV detector. The retention time of Tenofovir disoproxil fumarate and Emtricitabine were 2.81min and 4.72min respectively. Validation of the method was done according to the ICH guidelines for different analytical parameters. The method was found to be linear over a range of 40-80mg/ml for Tenofovir disoproxil fumarate and Emtricitabine. The established method proved as reproducible one with a %RSD value of less than 2 and having the robustness and accuracy within the specified...
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Posted by admin on Apr 27, 2017 in |
Today’s generic drugs manufacturing industry need robust analytical methods for analysis of generic drug products to provide best quality pharmaceutical formulation. Entacapone, Levodopa and Carbidopa tablets is such a product which is used for the treatment of Parkinson’s disease. This paper presents a robust HPLC method that has been developed for estimation of % drug release of Entacapone in this multi component drug formulation. HPLC column used for separation was Cosmosil 5PE-MS 150mm x 4.6 mm with 5 micron particle size. Combination of phosphate buffer pH 2.5, acetonitrile and methanol was used for mobile phase in isocratic mode with UV detection at 280 nm. The method was validated to ensure suitability of the method for quantitative determination of % drug release of Entacapone in presence of Levodopa and Carbidopa in this triple drug combination pharmaceutical formulation. Proposed method was found to be specific, precise, robust, accurate and linear in range 0.066 to 0.33 mg/mL of...
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Posted by admin on Apr 12, 2017 in |
Staphylococcus aureus biofilm has been known as one inducing factor for the bacteria’s resistance to various antibiotics. One strategy which may increase the efficacy of the antibiotic is by combining the antibiotic therapy with antiinfective from natural resources. This research was evaluating the potency of three known antiinfective essential oil derived from leaves of Piper betle L., Ocimum basilicum L. forma citratum Back and Cymbopogon citratus L., in a combination with antibiotics i.e. chloramphenicol, streptomycin, and erythromicin towards S. aureus ATCC 29213. The essential oils were obtained by steam-hydrodistillation of the fresh raw materials. Microdillution technique combined with colorimetric was used to determine the biofilm inhibition. Crystal violet was used for biofilm staining of which the reading was performed on a microplate reader. Fractional Inhibitory Concentration Index (FICI) values was evaluated based on the comparison of % inhibitory obtained from the essential oils and the antibiotics in a single and in a combination. The essential oils alone has the PMIC50 (planktonic) values as follows, 0.2% (P. betel), 0,3% (C....
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Posted by admin on Mar 31, 2017 in |
Cjanus cajan (L.) Millsp belonging to the family Fabaceae commonly known as pigeonpea or arhar. The present study conducted to assess the phytochemical and pharmacognostic in terms of organoleptic, fluorescence analysis and physicochemical parameters of seed coat and cotyledon of C. cajan. Differential extraction yielded of seed coat extracts of petether, chloroform, ethanol and aqueous shows 6.3%, 1.14%, 11.36% and 9.32% and cotyledon extracts of pet ether, chloroform, ethanol and aqueous shows 7.34 %, 4.25%, 10.45 % and 8.45 % respectively. Physicochemical parameters such as total ash, acid insoluble ash and water soluble ash of seed coat and cotyledon were found to be 14.5% and 11.5%, 8.35% and 7.36%, 2.11% and 3.39% respectively. Further the mineral elements like zinc, magnesium and copper content were found more in seed coat whereas, maximum content of iron were observed in cotyledon. The fluorescent analyses of powdered drug play an important role in the determination of quality and purity of the drug. Phytochemical analysis revealed the presence of glycosides, tannins, flavonoids, phenols, lignins,...
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Posted by admin on Mar 31, 2017 in |
Different new compounds derived from 2-(3-flourobiphenyl-4-yl) propanohydrazide [2] as starting material were synthesized. Reaction [2] with maleic anhydride, succinic anhydride and phthalic anhydride gave the corresponding cyclicimides [3a-c]. The hydrazone derivatives [4a-d] were obtained by condensation of compound [2] with 2,4-dimethoxybenzaldehyde, 4-(N,N-dimethylamino)benzaldehyde, 3-hydroxybenzaldehyde and 2-hydroxybenzaldehyde. The cyclization of [2] with CS2 in presence potassium hydroxide and hydrazine hydrate gave 1,2,4-triazole compound [5], that condensation either with 2,4-dimethoxybenzaldehyde, 4-(N,N-dimethyl amino) benzaldehyde, 3-hydroxybenzaldehyde and 2-hydroxybenzaldehyde to give the corresponding Schiff-bases [6a-d]. The cyclization of hydrazone derivatives [4a-d] with phenyl isocyanate, maleic anhydride, succinic anhydride and phthalic anhydride gave the corresponding aza-β-lactams [7a-d], oxazepine [8,9,10 a-d]. The structures of new compounds are supported by FT-IR, 1H-NMR and 13C-NMR. Compounds [3c], [4c], [8d], [7d] and [4b] were evaluated in vivo for their anti-inflammatory activity comparable to the standard drug flurbiprofen. Compound 2-(2-hydroxyphenyl)-3-[2-(3-fluorobiphenyl-4-yl)] propan- amido-2,3-dihydro-1,3-oxazepine-4,7-dione [8d] showed anti-inflammatory activity more than the standard drug flurbiprofen, in the egg-albumin induced paw edema in...
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