Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=20523#.VNhtJCzQrzE Author(s)   B. Gideon , L. Ward , K. Short Affiliation(s) ARV Offshore, Bangkok, Thailand . School of Civil, Environmental and Chemical Engineering, RMIT University, GPO Box 2476V, Melbourne, Vic. 3001, Australia . Australian Nuclear Science and Technology Organization, Lucas Heights, NSW, 2234, Australia . ABSTRACT Standard metallography and optical microscopy are well established techniques for the characterization of duplex stainless steels (DSS), which consist of approximately 50% ferrite and 50% austenite. Recently, the use of atomic and magnetic force microscopies (AFM and MFM respectively) have been employed to differentiate between magnetic and non magnetic phases in materials. Such techniques would be valuable to identify different phases in duplex stainless steels, particularly the weld regions, and would thus compliment sta...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53536#.VMh97izQrzE Author(s)     Jaishree Damodharan 1 , Kanchana Gopinath 2 , Kesavasamy Ramasamy 3   Affiliation(s) 1 Department of Physics, Sri Ramakrishna Institute of Technology, Coimbatore, India . 2 Department of Physics, Government Arts College, Coimbatore, India . 3 Department of Physics, Sri Ramakrishna Engineering College, Coimbatore, India . ABSTRACT Organic non-linear optical crystal diphenyl urea with molecular formula C 13 H 12 N 2 O was synthesized and grown successfully by slow evaporation solution growth technique. The single crystal X-ray diffraction (XRD) confirms that it crystallizes in orthorhombic crystal system with non-centrosymmetric space group Pna21. The various functional groups were identified qualitatively by Fourier transform-infra red (FT-IR) and FT-Raman techniques. The electron absorption spectrum was studied b...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53396#.VMCLTCzQrzE Author(s)    Satyanarayana Battu , Vasudev Pottabathini Affiliation(s) Department of Chemistry, University College of Science, Osmania University, Hyderabad, India . ABSTRACT Lansoprazole degradation is accelerated in both acidic and basic medium in water. The present investigation deals with the hydrolytic degradation of Lansoprazole. Acidic medium degradation show all known impurities and degradation products whereas basic degradation studies show new impurity which has higher molecular weight than Lansoprazole. New impurity was identified, isolated using mass based auto purification system and characterised by 1 H NMR, 13 C NMR, HMBC, HSQC, NOE, COSY and HRMS experiments. Isolated impurity was showing molecular weight of 467.10, molecular formula of C 23 H 16 F 3 N 5 OS and its name is 7-(3-Methyl-4-(2,2,2-trifluoroethoxy) pyrid...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52929#.VKyjCcnQrzE Author(s)    Anamaria Teodora Coêlho Rios Silva , Barbara Camilla Oliveira Cardoso , Maria Elisa Scarpelli Ribeiro e Silva , Roberto Fernando Souza Freitas , Ricardo Geraldo Sousa *   Affiliation(s) Polymer Science and Technology Laboratory, Chemical Engineering Department, School of Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil . ABSTRACT The poly(lactic-co-glycolic acid), known as PLGA, is one of the main bioreabsorbable polymers used in the field of medicine today. This copolymer is widely applied in sutures, devices geared toward the controlled release of medication, and the guided regeneration of bone tissue as it presents a short degradation time. This work aimed to synthesize the 82/18 PLGA (expressed by the mass ratio of D,L-lactide and glycolide, respectively), to characterize and study the in...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=51142#.VFbfr2fHRK0 Author(s)   Pradnya N. Vaingankar * , Archana R. Juvekar Affiliation(s) Department of Pharmaceutical Science and Technology, Institute of Chemical Technology, Mumbai, India . ABSTRACT The present study focused on production of mycelial chitosan from fungal mycelium by submerged fermentation with ecologically more balanced process. Different fungal strains were screened and Absidia butleri NCIM 977 was found to produce the highest mycelial chitosan. The one-factor-at-a-time method was adopted to investigate the effect of batch time, environmental factors ( i.e . initial pH and temperature) and medium components ( ...