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Investigation of hepatoprotective activity of Cyathea gigantea(***.)leaves against paracetamol-induced hepatotoxicity in rats

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Asian Pacific Journal of Tropical biomedicine 2012年第5期2卷 352-356页

作者： P Madhu Kiran A Vijaya Raju b ganga rao A.U College of Pharmaceutical Sciences Andhra University

Objective:To investigate the hepatoprotective activity of methanolic leaf extract of Cyathea gigantea(***)against paracetamol induced liver damage in ***:The hepatoprotective activity for plant extract was investigated for paracetamol induced hepatoxicity in *** albino rats of either sex were divided into five groups of 6 animals each and are given orally the following treatment for seven *** normal control group was given 1%*** 1mL/kg bw,*** at dose of 1g/kg bw,*** given as toxic dose for inducing ***(50mg/kg.p.o.) was given as reference *** doses of C. gigantea extract i.e.,100 mg/*** 200 mg/kg,*** tested for hepatoprotective activity. The treatment was given for seven days and after 24 h of last treatment blood was collected from retro-orbital plexus and analysed for various serum parameters like serum glutamic-oxaloacetic transaminase(SGOT),serum glutamic pyruvic transaminase(SGPT),alkaline phosphatase(ALP),total bilirubin(Tb)and total protein(TP)in different ***:The paracetamol intoxication lead to histological and biochemical *** treatment with methanolic leaf extract of *** reduced the elevated levels of SCOT,SGPT,ALP,Tb and also reversed the hepatic damage towards normal which further supports the hepatoprotective activity of leaf extract of ***:The methanolic extract of leaves of *** at doses of 100 mg/kg bw and 200 mg/kg bw have significant effect on liver of paracetamol induced hepatotoxicity model in rats.

关键词： Hepatoprotective Cyathea gigantea Paracetamol Silymarin Hepatotoxicity

Evaluation of in-vitro antibacterial activity and anti-inflammatory activity for different extracts of Rauvolfia tetraphylla *** bark

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Asian Pacific Journal of Tropical biomedicine 2012年第10期2卷 818-821页

作者： b.ganga rao P.Umamaheswara rao E.Sambasiva rao T.Mallikarjuna rao V.S.Praneeth.D A.U College of Pharmaceutical Sciences Andhra UniversityVisakhapatnamA.P

Objective:To assess the in-vitro antihacterial activity and anti-inflammatory activity of orally administered different extracts(Hydro-alcoholic,methanolic,ethyl acetate and hexane)of Rauvolfia tetraphylla(***)root bark in Carrageetiaii induced acute inflammation in ***:In-vitro antibacterial activity was evaluated for extracts against four Gram positive and four Gram negative bacteria by using cylinder plate ***-alcoholic extract(70%v/v ethanol)at 200,400 and 800 mg/kg doses and methanolic,ethyl acetate and hexane extracts at doses 100,200 and 400 mg/kg were tested for anti-inflammatory activity in Carrageenan induced rat paw oedema model and paw thickness was measured every one hour up to 6 ***:All extracts of *** root bark showed good zone of inhibition against tested bacterial *** Carrageenan induced inflammation model,hydro-alcoholic and methanolic extract of *** root bark at three different doses produced significant(Pbark shows good in-vitro antibacterial activity and in-vivo anti-inflammatory activity in rats.

关键词： Rauvolfia tetraphylla Root bark In-vitro antibacterial activity Inflammation Anti-inflammatory activity

Investigation of antioxidant and anti-inflammatory activity of leaves of Dalbergia paniculata(Roxb)

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Asian Pacific Journal of Tropical Medicine 2012年第6期5卷 455-458页

作者： ganga rao b Madhu Kiran P Vijaya Raju AD Pharmacognosy and Phytochemistry A.U College of Pharmaceutical SciencesAndhra UniversityVisakhapatnamA.P.India-530 003 A.U College of Pharmaceutical Sciences Andhra UniversityVisakhapatnamA.PIndia-530 003

Objective:To investigate the antioxidant and anti-inflammatory activity of orally administered methanolic leaf extract of Dalbergia paniculala(***) in Carrageenan induced inflammation in ***:In vitro antioxidant activity was evaluated for superoxide radical, Hydroxyl radical and DPPH radical scavenging *** doses 200 mg/kg,400 mg/kg and 800 mg/kg of *** were tested for anti-inflammatory activity in Carrageenan induced rat paw edema model and paw thickness was measured every one hour up to 6 h. Results:The melhanolic leaf extract of *** produced dose dependent inhibition of Superoxide radical,Hydroxyl radical and OPPH *** Carrageenan induced inflammation model,all three doses produced significant percentage inhibition of rat paw edema and 800 mg/kg dose produced maximum percent inhibition of rat paw edema(47.83%) at 3h compared to control ***:In the present study we found that methanolic leaf extract of *** showed good in vitro antioxidant activity and in vivo anti-inflammatory activity in rats.

关键词： Anti-inflammatory activity Antioxidant activity Dalbergia paniculata Free radicals Carragenan Inflammation Edema

Design of Fuzzy Logic Control Framework for QoS Routing in MANET

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Intelligent Automation & Soft Computing 2023年第3期35卷 3479-3499页

作者： M.Vargheese S.Vanithamani D.Stalin David ganga Rama Koteswara rao Department of Computer Science and Engineering PSN College of Engineering and TechnologyTirunelveli627152Tamil NaduIndia Department of Master of Computer Applications M.Kumarasamy College of EngineeringKarur639113Tamil NaduIndia Department of Information Technology Veltech Multitech Dr.Rangarajan Dr.Sakunthala Engineering CollegeChennai600062Tamil NaduIndia Department of Computer Science and Information Technology Koneru Lakshmaiah Education FoundationVaddeswaram522502Andhra PradeshIndia

Wireless networks with no infrastructure arise as a result of multiple wireless devices working *** Mobile Ad hoc Network(MANET)is a system for connecting independently located Mobile Nodes(MNs)via wireless links.A MANET is self-conﬁguring in telecommunications,while MN produces non-infrastructure networks that are entirely *** the MAC and routing layers of MANETs take into account issues related to Quality of Service(QoS).When culling a line of optical discernment communication,MANET can be an effective and cost-saving route cull *** maintain QoS,however,more or fewer challenges must be *** paper proposes a Fuzzy Logic Control(FLC)methodology for specifying a probabilistic QoS guaranteed for *** framework uses network node mobility to establish the probabil-istic quality of *** Logic(FL)implementations were added to Network Simulator-3(NS-3)and used with the proposed FLC framework for *** have found that for a given node’s mobility,the path’s bandwidth decreases with time,hop count,and *** is resolutely based on this fuzzy rule that the priority index for a packet is ***,by avoiding sending pack-ets(PKT)out of source networks when there are no beneﬁcial routes,bandwidth is not *** FLC outperforms the scheduling methods with a wide range of *** improve QoS within MANETs,it is therefore recommended that FLC is used to synchronize ***,using these performance metrics,the QoS-responsible routing can opt for more stable *** on network simulation,it is evident that incorporating QoS into routing protocols is meant to improve traf-ﬁc performance,in particular authentic-time trafﬁc.

关键词： MANET quality of service fuzzy logic mobile node network trafﬁc

Representation of classifier distributions in terms of hypergeometric functions

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China Particuology 2007年第4期5卷 274-283页

作者： b.Venkoba rao Engineering and Industrial Services Tata Consultancy Services Ltd.1 Mangaldas RoadPune 411001India

This paper derives alternative analytical expressions for classifier product distributions in terms of Gauss hypergeometric function, 2F1, by considering feed distribution defined in terms of Gates-Gaudin-Schumann function and efficiency curve defined in terms of a logistic function. It is shown that classifier distributions under dispersed conditions of classification pivot at a common size and the distributions are difference similar. The paper also addresses an inverse problem of classifier distributions wherein the feed distribution and efficiency curve are identified from the measured product distributions without needing to know the solid flow split of particles to any of the product streams.

关键词： Classifier Efficiency curve Inverse problem

Effects of space and temperature dependent internal heat generation/absorption on MHD flow of a nanofluid over a stretching sheet

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Journal of Hydrodynamics 2015年第6期27卷 945-954页

作者： ganga b. SARANYA S. VISHNU GANESH N. AbDUL HAKEEM A.K. Department of Mathematics Providence College for Women Department of Mathematics Sri Ramakrishna Mission Vidyalaya College of Arts and Science

In this paper we analyzed the effects of space and temperature dependent intemal heat generation/absorption （non-uniform heat source/sink） on magnetohydrodynamic boundary layer flow of water based nanofluid over a stretching sheet with different nanoparticles. The flow is generated due to linear stretching of the sheet and influenced by uniform magnetic field, which is applied normally to the stretching sheet. A scaling group of transformation is used to reduce the governing momentum and energy equations into non-linear ordinary differential equations. The resulting differential equations are solved analytically using hypergeometric functions and numerically by the fourth order Runge-Kutta method with shooting technique. The influence of nanoparticle volume fraction, magnetic field, Prandtl number, non uniform heat source/sink, local skin friction coefficient and reduced Nusselt number are investigated for different nanoparticles.

关键词： nanofluid MHD heat generation/absorption stretching sheet

An ecofriendly approach for corrosion control of 6061 Al-15%(v)SiC(P)composite and its base alloy

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Chinese Journal of Chemical Engineering 2017年第3期25卷 363-372页

作者： Charitha b.P. Padmalatha rao Department of chemistry Manipal Institute of TechnologyManipalUdupiKamatakaIndia

Corrosion inhibition characteristics of bio polymer dextran was studied for the corrosion control of 6061 Al-15%_((v)) SiC_((P)) composite and its base alloy in 1 mol·L^(-1) HCl. Standard electrochemical techniques such as potentiodynamic polarization(PDP) measurements and electrochemical impedance spectroscopy(EIS) method were adopted for corrosion rate measurement. Surface morphology was studied by scanning electron microscopy(SEM) and elemental mapping was done by energy dispersive X-ray(EDX) analysis. Suitable mechanism was proposed for corrosion and inhibition process. Results indicated that dextran acts as an excellent anticorrosive agent for the corrosion control of 6061 Al-15%_((v)) SiC_((P)) composite, with maximum inhibition efficiency of 91% for the concentration of 0.4 g·L^(-1) at 303 K. Dextran acted as a mixed type of inhibitor, and got physically adsorbed both on composite and base alloy by obeying Langmuir adsorption isotherm. Dextran is proved to be a green inhibitor with environmental and economic benefits.

关键词： 6061 Al-15%(v) SiC(p) composite Green inhibitor biopolymer Electrochemical studies SEM–EDX

Lactobionic Acid as a New Synergist in Combination with Phosphonate-Zn(Ⅱ)System for Corrosion Inhibition of Carbon Steel

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Journal of Materials Science & Technology 2014年第1期30卷 77-89页

作者： S.Srinivasa rao b.V.Appa rao S.Roopas Kiran b.Sreedhar Department of Chemistry V.R.Siddhartha Engineering College(Autonomous) Department of Chemistry National Institute of Technology Warangal(NITW) INFN Sezione di Padova Inorganic & Physical Chemistry Division Indian Institute of Chemical Technology(IICT)

Studies on lactobionic acid introduced as a synergist in the presence of phosphonobutane-1,2,4-tricarboxylic acid （PbTC） and zinc ions for corrosion control of carbon steel in aqueous environment are presented. The investigations revealed that lactobionic acid （LbA） acts as an excellent synergist in corrosion inhibition. Optimum concentrations of all the three components of the ternary formulation are established by gravimetric studies. Potentiodynamic polarization studies indicate that the new ternary system is a mixed inhibitor. Impedance studies show that a protective film is formed on the metal surface in the presence of the inhibitor formulation. The film is found to exhibit its protective nature even at higher temperatures up to 60 ~C. Analysis of the protective film by X-ray photoelectron spectroscopy （XPS） and reflection absorption Fourier transform infrared （FTIR） spectroscopy infers the presence of Zn（OH）2, oxides and hydroxides of iron and the inhibitor molecules in the surface film probably in the form of a complex, [Zn（II）-PbTC-LbA]. The morphological studies by scanning electron microscopy （SEM） and the topographical studies by atomic force microscopy （AFM） also indicate the presence of protective film on the metal surface. A plausible mechanism of corrosion inhibition is proposed.

关键词： Corrosion inhibitor Carbon steel Synergism X-ray photoelectron spectroscopy Electrochemical impedance spectroscopy

Experimental study on the partition behaviour of Ta, Nb and W between different phases in the processes of crystallization differentiation of albite granitic magma

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Chinese Science bulletin 1997年第16期42卷 1372-1377页

作者： Zhao, JS Zhao, b rao, b Chinese Acad Sci Guangzhou Inst Geochem Guangzhou 510640 Peoples R China Nanjing Univ Dept Earth Sci Nanjing 210008 Peoples R China

To counter the lack of consensus of opinion on mineralizations of Ta, Nb and W which have genetic relationship to fluorine-rich albite granite and the want of experimental evidence at present, some experiments reported in this study were carried out. The purpose of this study is to explain the genetic connection of Ta, Nb and W ore deposits and possible mechanism of their mineralization with the aid of the experimental results.

关键词： partition behaviour of Ta Nb and W process of crystallization differentiation of magma.