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Characterization of Intracellular Gold Nanoparticles Synthesized by Biomass of Aspergillus terreus

Acta Metallurgica Sinica(English Letters) 2014年第4期27卷 569-572页

作者： Baskar Gurunathan Pranav vasanthi Bathrinarayanan vasanth kumar muthukumarasamy Dilliganesh Thangavelu Department of Biotechnology St.Joseph’s College of EngineeringChennai 600 119India

Greener synthesis of nanoparticle is a revolutionizing area in research *** method of reduction of metal ions is often preferred because they are clean,safe,biocompatible,and environmentally acceptable than physical,chemical,and mechanical *** wet biomass of Aspergillus terreus（***） was utilized for the intracellular synthesis of gold *** nanoparticles were produced when an aqueous solution of chloroauric acid was reduced by *** biomass as the reducing *** of gold nanoparticles was confirmed by the color change of biomass from yellow to pinkish *** produced nanoparticles were then characterized by FT-IR,SEM,EDS,and *** SEM images revealed that the nanoparticles were spherical,irregularly shaped with no definite *** size of the biosynthesized gold nanoparticles was 186 *** presence of the gold nanoparticle was confirmed by EDS *** nature of synthesized gold nanoparticle was confirmed by XRD pattern.

关键词： Gold nanoparticles Biosynthesis Characterization Scanning electron microscope Energy dispersive spectroscopy

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Floral extract of Tecoma stans:A potent inhibitor of gentamicin-induced nephrotoxicity in vivo

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Asian Pacific Journal of Tropical Medicine 2011年第9期4卷 680-685页

作者： Raju S Kavimani S Uma Maheshwara rao V Sreeramulu Reddy K vasanth kumar G Vijaya College of Pharmacy MunaganoorRanga Reddy DistAndhra PradeshIndia-505511 Mather Theresa Post Graduate Institute of Health Sciences.Gorimedu PuducherryIndia Nulla Narsimha Reddy College of Pharmacy KorremulaRanga Reddy DistAndhra Pradesh.India Assistant manager - Clinical R&D Shantha Biotechnics LimitedHyderabadAndhra Pradesh.India -500004 Health Management and Research Institute HyderabadAndhra PradeshIndia

Objective:To highlight the nephroprotective activity of ethyl acetate extract of dried flowers of Tecomu stans for its protective effects on genlamicin-induced nephrotoxicity in albino rats. Methods:For studying acute toxicity study,single oral dose of 5（KM） mg ethyl acetate floral extract/kg hodv weight was administered to albino rats（five females,five males）.Nephrotoxicity was induced in albino rats by intraperitoneal administration of gentamicin 80 mg/kg/day for eight *** of concurrent administration of ethyl acetate floral extract of Tecoma stans at a dose of 100.200 and 300 mg/kg/day given by oral mute was determined using serum creatinine,serum uric acid,blood urea nitrogen and serum urea as indicators of kidney *** study groups contained six rats in each *** nephrotoxicity of gentamicin is known to involve induction of oxidative stress,in vitro antioxidant aclivity and free radical-scavenging activity of this extract was also ***:For acute toxicity testing both female and male rats administered with the extract at a dose of 5 000 mg/*** results showed no toxicity in terms of general behavior change,mortality,or change in gross appearance of internal organs(LD50>5 000 mg/kg). It was observed that the ethyl acetate floral extract of Tecoma stans significantly protected rat kidneys from gentamicin-induced histopathological ***-induced glomerular congestion,peritubular and blood vessel congestion,epithelial desquamation,accumulation ol inflamnialoiy cells and necrosis of the kidney cells were found to be reduced in the groups receiving the ethyl acetate floral extract of Tecoma starts along with gentamicin in a dose dependent *** floral extract also reduced the gentamicin-induced increase in serum creatinine,serum uric acid,blood urea nitrogen and serum urea levels（P>0.01）.Conclusions: The present study indicates a verv important role of reactive oxygen species（BOS） and the relation to re

关键词： Gentamicin Tecoma stans Rats Nephrotoxicity Serum urea Creatinine

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Bio-inspired carbon electro-catalysts for the oxygen reduction reaction

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Journal of Energy Chemistry 2016年第2期25卷 226-233页

作者： Kathrin Preuss vasanth kumar Kannuchamy Adam Marinovic Mark Isaacs Karen Wilson Isaac Abrahams Maria-Magdalena Titirici School of Engineering and Materials Science Queen Mary University of London Materials Research Institute Queen Mary University of London European Bioenergy Research Institute Aston University School of Biological and Chemical Sciences Queen Mary University of London

We report the synthesis, characterisation and catalytic performance of two nature-inspired biomassderived electro-catalysts for the oxygen reduction reaction in fuel cells. The catalysts were prepared via pyrolysis of a real food waste（lobster shells） or by mimicking the composition of lobster shells using chitin and CaCO3 particles followed by acid washing. The simplified model of artificial lobster was prepared for better reproducibility. The calcium carbonate in both samples acts as a pore agent, creating increased surface area and pore volume, though considerably higher in artificial lobster samples due to the better homogeneity of the components. Various characterisation techniques revealed the presence of a considerable amount of hydroxyapatite left in the real lobster samples after acid washing and a low content of carbon（23%）, nitrogen and sulphur（〈1%）, limiting the surface area to 23 m^2/g, and consequently resulting in rather poor catalytic activity. However, artificial lobster samples, with a surface area of ≈200 m^2/g and a nitrogen doping of 2%, showed a promising onset potential, very similar to a commercially available platinum catalyst, with better methanol tolerance, though with lower stability in long time testing over 10,000 s.

关键词： Carbonisation Biomass-derived carbons Oxygen reduction reaction Fuel cells Electro-catalysis

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Multi-compartmental transdermal patch for simultaneous delivery of multiple drugs:formulation and evaluation of newly developed novel dosage form

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Journal of Coastal Life Medicine 2015年第7期 534-538页

作者： Vijayan Venugopal Jayaraja kumar Selvadurai Muralidharan P.vasanth Raj Unit of Pharmaceutical Technology Faculty of PharmacyAIMST UniversityBedong-08100Malaysia

Objective:To evaluate the formulation of multi-compartmental transdermal patches for simultaneous delivery of multiple drugs:aceclofenac and ***:The patch was prepared by simple solvent casting method using hydroxy propyl methyl celluloseK100Mas matrix forming agent and dimethyl sulphoxide as permeation *** prepared transdermal patch was evaluated by physiochemical parameters andin-vitro diffusion ***:The multi-compartmental transdermal patch showed sustained drug release over the period of 12 ***:Multicompartmental transdermal patches shows better bioavailability,therapeutic efficacy and very economic as compared with other dosage forms.

关键词： Multi-compartmental Transdermal patch Aceclofenac Serratiopeptidase

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Major and Trace Element Characterization of Shallow Groundwater in Coastal Alluvium of Chidambaram Town, Cuddalore District, South India

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Journal of Geoscience and Environment Protection 2016年第1期4卷 64-76页

作者： Thangasamy Jeyavel Raja kumar Chinadurai Dushiyanthan Boopalan Thiruneelakandan Radhakrishnan Suresh Shanmugam vasanth Raja Mailare Senthilkumar Department of Earth Sciences Annamalai University Chidambaram India

Hydrogeochemical investigation of groundwater of Chidambaram town has been carried out to assess the suitability for drinking uses and the source for the ions acquisition process. Geologically, the area comes under the alluvial zone and is followed by tertiary formation, includes sands, sand stone, laterite, clayey black and stiff clay. The water level varies from 6 m to 10 m bgl. Twenty groundwater samples are collected and analysed for pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), major cations Ca2+, Mg2+, Na+, K+ and anions , Cl-, . The trace elements of Zn, Pb, Cr, Fe, Cd, Cu and Mn are determined. Study results reveal that groundwater in study area is a fresh water type. The pH, EC and TDS are noticed high and sequence of abundance of the major ions is Ca2+ > Na+ > Mg2+ > K+ and Cl- > > . The Stufzand chloride classification indicates that the groundwater is derived from precipitations and Scholler classification shown type I. Hydrochemical facies of groundwater are Ca2+ > Na+ > Cl- and saturation index shows that nearly all the water samples are under saturated with respect to carbonate (calcite, dolomite and aragonite) and sulfate (gypsum and anhydrite) minerals. Except Zn, other elements of Fe, Pb, Cr, Mn, Cu, and Cd are found high and above the permissible limit of drinking water standard. The ionic concentration present in the groundwater of the study area can be from wastes of commercial activities, domestic sewage and automobiles rather than by ionic exchange and geological formation.

关键词： Groundwater Quality Hydrogeochemical Processes Saturation Index Trace Elements

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