Posted by admin on Aug 31, 2019 in |
The current work defines development of a simple, rapid and precise method based on gas chromatography coupled with Flame Ionization Detector (GC-FID) for the quantitative estimation of diphenhydramine (DPH) present in the marketed formulations following the principles of green analytical chemistry. The analysis was performed using Zebron Phase: ZB-DRUG-1 column with Nitrogen as a carrier gas having a flow rate of 1 ml/min. The injection volume was 1 µL and with the split ratio of 1:10. The retention time of the drug was found to be 4.5 minutes. The developed method was validated according to the ICH guidelines, proving the method to be sensitive towards the analyte with accuracy (mean recovery = 98%), linearity in the range of 2-10 µg/ml (r2 0.993), precision (intraday = 1.118% RSD, interday = 1.16 % RSD), LOD 0.2 µg/ml and LOQ 0.5 µg/ml. The degradation study showed that the drug remains stable in acid, base, neutral, oxidation, and photolytic method. The developed method can be effectively employed for the day to day analysis...
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Posted by admin on Aug 31, 2019 in |
Selecting the best possible design is an uphill task considering a lot of criteria which must be scrutinized while choosing any design out of many alternative design options available. The experimental design is often compared and selected based on alphabetical design optimality criteria, like A, D, G or V. Each of them attempts to summarize any one important characteristic of the selected design. G-optimality criteria favor those experimental designs which are having the smallest maximum prediction variance over the entire region of interest. It does not consider the distribution of the magnitude of the prediction variance throughout the region. Graphical methods like variance dispersion graph and the fraction of design space plots can be used to overcome this drawback. These graphical methods are explored extensively for comparing the quality of prediction throughout the design space. It serves as a useful tool to assess the prediction performance of the design and making a comparison between experimental designs. The fraction of the design space plot provides a comprehensive picture of the...
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Posted by admin on Aug 31, 2019 in |
In this present investigation author reporting the anti-bacterial activity of five new azo methines, namely 2-((1-hydroxy-2- methyl propan-2-ylimino) methyl)-6-methoxyphenol (AZM1), 4-((1-hydroxy-2- methyl propan-2-ylimino) methyl)-6-methoxyphenol(AZM2), 4-((1-hydroxy-2-methyl propan-2-ylimino) methyl)-2,6,dimethxy phenol (AZM3), 2- (3, 4- dimethoxybenzylideneamino)- 2- methylpropan-1-ol (AZM4) and 2-(3,4,5-trimethoxybenzylideneamino)-2-methylpropan-1-ol (AZM5) against and Bacillus thuringiensis, E. coli bacteria. All new five novel Azomethines were synthesized by the condensation of 2-Amino-2-Methyl-1-Propanol with 2- Hydroxy- 3- methoxybenzaladehyde, 4-Hydroxy- 3- Methoxy-Benzaldehyde, 4- Hydroxy- 3, 5- Dimethoxy Benzaldehyde, 3,4-Dimethoxy Benzaldehyde and 3, 4, 5-Trimethoxy Benzaladehyde respectively, in methanol-water (1:1 ratio) at 42 ºC for 8 h. All the azomethines were characterized by UV, IR and thermal elemental analyzer. Anti-bacterial studies were carried out by using Paper disc diffusion method, beef extract is used as bacterial source, chloromphenicol and ketocanazole used as reference standards, five azomethines gave the following order of antibacterial activity and order of zone of inhibition was AZM5 (12mm) > AZM4 (7mm) > AZM3 (10mm) > AZM1 (9mm) > AZM2 (8mm) against E. coli and AZM5 (11mm) > AZM4 (10mm) > AZM3 (9mm)...
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Posted by admin on Aug 31, 2019 in |
The fabrication of spherical gold nanoparticles (AuNPs) using the reducing agent and stabilizing agent Coccinia grandis is reported here. Irradiation of the reaction mixture under a domestic microwave oven enabled the formation of gold nanoparticles. The successful formations of AuNPs were characterized by UV-Visible spectroscopy (UV-Vis), Fourier transforms infrared spectroscopy (FTIR), X-ray powder diffraction and transmission electronic microscopy (TEM). Chemical components are inherent in the leaf extract which reduces the gold were identified using FTIR Spectra. The crystal structure of the AuNPs was established as a face-centered cube by the Powder XRD analysis. TEM results suggested that under optimized synthetic conditions monodispersed and spherical nanoparticles with an average diameter of 10 ± 2 nm could be achieved. The nanoparticles effectively showed catalytic activity for the reduction of environmental pollution causing methylene blue dye. The study concludes that the synthesized nanoparticles could be considered as environmental protectants due to its potent catalytic...
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Posted by admin on Aug 31, 2019 in |
Anti-HIV drug discovery has been increasingly focusing on HIV-1- reverse transcriptase as a potential therapeutic target. Pyrimidine-based derivatives are studied for their HIV-1 reverse transcriptase inhibition activities using in-silico techniques. The library of 19 pyrimidine-based derivatives designed using computer-based molecule designed software and docked with HIV-1 reverse transcriptase enzyme using AutoDock. The reported binding energies for the library of molecules are ranging from –9.43Kcal/mole to -13.19 Kcal/mole, with the precision of ±1 Kcal/mole. It is concluded that the presence of –CH2OH at R1 position suitable for hydrogen bonding and –C6H5 group enhance the negative binding energy (ΔG...
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