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Search Results: 1 - 10 of 200618 matches for " P Govindwar "
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In vivo and In vitro Effect of Sulfamerazine on Hepatic Mixed Function Oxidase in Rats
P.B. Dandge,S.P. Govindwar
Research Journal of Pharmacology , 2013, DOI: 10.3923/rjpharm.2011.53.58
Abstract: Sulfamerazine (SMR) administration (i.p., 3 days) of different doses to adult male rats showed significant decrease in electron transport components and drug metabolizing enzymes. In longer duration study, 100 mg SMR kg-1 caused significant decreases in cytochrome P-450 and activities of aminopyrine N-demethylase and aniline hydroxylase. In inhibitory dose of 100 mg SMR kg-1 was selected for dosing young male, old male and adult female rats. Sulfamerazine administration to young, old male and female rats resulted in a significant decrease in electron transport component and drug metabolizing activities at 100 mg SMR kg-1 dose level. All other parameters were unchanged. Sulfamerazine resulted in uncompetitive type of inhibition (Ki = 3.0 mM) of aminopyrine N-demethylase in vitro. Sulfamerazine destructed the spectral and catalytic activity of cytochrome P-450. The studies suggest that SMR is a substrate of the mixed function oxidase system and inhibition is dependent on dosage, age and sex of the animals.
Differential fate of metabolism of a disperse dye by microorganisms Galactomyces geotrichum and Brevibacillus laterosporus and their consortium GG-BL
Tatoba R Waghmode,Mayur B Kurade,Anuradha N Kagalkar,Sanjay P Govindwar,
Tatoba R. Waghmode
,Mayur B. Kurade,Anuradha N. Kagalkar,Sanjay P. Govindwar

环境科学学报(英文版) , 2012,
Abstract: The present work aims to evaluate Brown 3 REL degrading potential of developed microbial consortium GG-BL using two microbial cultures, Galactomyces geotrichum MTCC 1360 (GG) and Brevibacillus laterosporus MTCC 2298 (BL). Microbial consortium GG-BL showed 100% decolorization of a dye Brown 3 REL, while individually G. geotrichum MTCC 1360 and B. laterosporus MTCC 2298 showed 26% and 86% decolorization under aerobic condition (shaking) respectively. Measurements of biochemical oxygen demand (BOD) (76%) and chemical oxygen demand (COD) (68%) were done after decolorization by consortium GG-BL. No induction in activities of oxidoreductive enzymes found in G. geotrichum while B. laterosporus showed induction of veratryl alcohol oxidase, Nicotineamide adenine dinucleotide-dichlorophenol indophenol (NADH-DCIP) reductase and riboflavin reductase indicating their role in dye metabolism. Consortium GG-BL showed induction in the activities of laccase, veratryl alcohol oxidase, tyrosinase, NADH-DCIP reductase and riboflavin reductase. Two different sets of induced enzymes from G. geotrichum and B. laterosporus work together in consortium GG-BL resulting in faster degradation of dye. The degradation of Brown 3 REL was analyzed using high performance thin layer chromatography (HPTLC), high performance liquid chromatography (HPLC), Fourier transform infrared spectroscopy (FT-IR) and gas chromatography mass spectroscopy (GC-MS). Phytotoxicity study revealed that metabolites formed after degradation was significantly less toxic in nature.
Degradation of Textile Dye Reactive Navy – Blue Rx (Reactive blue–59) by an Isolated Actinomycete Streptomyces krainskii SUK – 5
Mane, U. V.,Gurav, P. N.,Deshmukh, A. M.,Govindwar, S. P.
Malaysian Journal of Microbiology , 2008,
Abstract: The isolated Actinomycete, Streptomyces krainskii, SUK -5 was found to decolorize and degrade textile dye Reactive blue–59.This azo dye was decolorized and degraded completely by Streptomyces krainskii SUK–5 at 24 h in shaking condition in the nutrient medium at pH 8. Induction in the activity of Lignin Peroxidase,and NADH-DCIP Reductase and MR reductase represents their role in degradation .The biodegradation was monitored by TLC, UV vis spectroscopy, FTIR. and GCMS analysis. Microbial and phytotoxicity studies of the product were carried out.
Biodegradation of Crystal Violet by Agrobacterium radiobacter

G K Parshetti,S G Parshetti,A A Telke,D C Kalyani,R A Doong,P Govindwar,

环境科学学报(英文版) , 2011,
Abstract:
Effect of Methomyl on the Phenobarbital and Benzo [a] Pyrene Induced Hepatic Microsomal Mixed Function Oxidase System in Rats
Jyotsna A. Patil1, Arun J. Patil1*, Ajit V. Sontakke1, Satish D. Kalme2 and Sanjay P. Govindwar3
Al Ameen Journal of Medical Sciences , 2011,
Abstract: Methomyl (Lannate) is a pesticide widely used to control of insects in grape gardens. Methomyl treatment induces significant alteration in mixed function oxidase system. The present work was designed to study the inhibitory effect of methomyl on different forms of cytochrome P450 induced by phenobarbital (CYP 2B1, 2B2 and 3A) and benzo[a]pyrene induced (CYP 1A1). Adult male rats were divided into 8 groups of 6 animals each. Microsomes were isolated by calcium precipitation. The levels of electron transport components, CYP 450, cytochrome b5, and cytochrome c-reductase were determined using extinction coefficients. Activities of drug-metabolizing enzymes were assayed. Inducers like phenobarbital, benzo[a]pyrene, showed significant induction of mixed function oxidase in rat. The methomyl treatment (4mg/kg) of inducer-(Phenobarbital, benzop [a] pyrene) pretreated rat caused a significant decrease in electron transport components and activities of drug-metabolizing enzymes when compared with treatment of inducer alone. Induction of mixed function oxidase enzymes due to phenobarbital was also altered by the pretreatment of methomyl. Benzo[a]pyrene treatment of methomyl pretreated rats showed significant decreased levels of electron transport components and drug metabolizing enzymes as compared to benzo[a]pyrene treatment alone. These results indicate that the susceptibility of phenobarbital and benzo[a]pyrene induced cytochrome P450 isoform (CYP 2B1, 2B2, 3A; and CYP 1A1) to methomyl and also affected in the induction pattern of some of the inducers with respect to CYP 450 isoforms.
Effect of methomyl on hepatic mixed function oxidases in rats
Patil Jyotsna,Patil Arun,Sontakke Ajit,Govindwar Sanjay
Indian Journal of Pharmacology , 2008,
Abstract: Objective: To study the effect of the methomyl on mixed function oxidase system in rats. Materials and Methods: The effect of the methomyl on mixed function oxidase was studied using different dosages, durations and sex. Microsomes were isolated using the calcium precipitation method. The levels of cytochrome P 450 , and cytochrome b 5 were determined using extinction coefficient of 91 and 85 mM -1 respectively. The activities of drug metabolizing enzymes, hemoglobin content, liver function enzymes, and serum cholinesterase activity were assayed by using standard methods. Results: Intraperitoneal administration of methomyl (4 mg/kg body weight) showed significant decrease in the level of cytochrome P 450 , and the activities of aminopyrine N-demethylase and aniline hydroxylase on the third day of the treatment. Methomyl (4 mg/kg) treatment of old male rat and adult female rat also showed a decrease in the level of cytochrome P 450 , and aminopyrine N-demethylase activity. The serum samples from methomyl treated rats (male and female), when analyzed for alanine aminotransferase (SGPT) and aspartate aminotransferase (SGOT) as markers of the liver toxicity, showed significant increase in the activity. The activities of SGPT and SGOT were significantly higher in the treated rats (2 and 4 mg/kg) than in the control group. A significant decrease in the level of hemoglobin and serum cholinesterase activity was observed, when there was an increase in the dose level. A significant increase was observed in alkaline phosphatase activity at all dose levels. Conclusion: Methomyl influences mixed function oxidase and creates abnormality of liver functions in the rats. This effect depends on the dose and duration of methomyl.
Hybrid Fuzzy Controller Based Frequency Regulation in Restructured Power System  [PDF]
P. Anitha, P. Subburaj
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.76065
Abstract: This paper discusses the implementation of Load Frequency Control (LFC) in restructured power system using Hybrid Fuzzy controller. The formulation of LFC in open energy market is much more challenging; hence it needs an intelligent controller to adapt the changes imposed by the dynamics of restructured bilateral contracts. Fuzzy Logic Control deals well with uncertainty and indistinctness while Particle Swarm Optimization (PSO) is a well-known optimization tool. Abovementioned techniques are combined and called as Hybrid Fuzzy to improve the dynamic performance of the system. Frequency control of restructured system has been achieved by automatic Membership Function (MF) tuned fuzzy logic controller. The parameters defining membership function has been tuned and updated from time to time using Particle Swarm Optimization (PSO). The robustness of the proposed hybrid fuzzy controller has been compared with conventional fuzzy logic controller using performance measures like overshoot and settling time following a step load perturbation. The motivation for using membership function tuning using PSO is to show the behavior of the controller for a wide range of system parameters and load changes. Error based analysis with parametric uncertainties and load changes is tested on a two-area restructured power system.
Integral Performance Criteria Based Analysis of Load Frequency Control in Bilateral Based Market  [PDF]
P. Anitha, P. Subburaj
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.76086
Abstract: Performance index based analysis is made to examine and highlight the effective application of Particle Swarm Optimization (PSO) to optimize the Proportional Integral gains for Load Frequency Control (LFC) in a restructured power system that operates under Bilateral based policy scheme. Various Integral Performance Criteria measures are taken as fitness function in PSO and are compared using overshoot, settling time and frequency and tie-line power deviation following a step load perturbation (SLP). The motivation for using different fitness technique in PSO is to show the behavior of the controller for a wide range of system parameters and load changes. Error based analysis with parametric uncertainties and load changes are tested on a two-area restructured power system. The results of the proposed PSO based controller show the better performance compared to the classical Ziegler-Nichols (Z-N) tuned PI andFuzzy Rule based PI controller.
Projection of the Semi-Axes of the Ellipse of Intersection  [PDF]
P. P. Klein
Applied Mathematics (AM) , 2017, DOI: 10.4236/am.2017.89097
Abstract:
It is well known that the line of intersection of an ellipsoid and a plane is an ellipse (see for instance [1]). In this note the semi-axes of the ellipse of intersection will be projected from 3d space onto a 2d plane. It is shown that the projected semi-axes agree with results of a method used by Bektas [2] and also with results obtained by Schrantz [3].
太古宙绿岩带金矿区域预测准则
д.в.Pундцвист
黄金科学技术 , 1991,
Abstract:
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