Scientific Research Publishing

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=52836#.VKoBocnQrzE Author(s) Jing Zhu , Shuang Chen , Baohe Wang , Xiaorong Zhang Affiliation(s) Research and Development Center of Petrochemical Technology, Tianjin University, Tianjin, China . ABSTRACT Hexafluorobutadiene is a new plasma etching gas for semiconductor molectron which has perfect properties and also is a preceding monomer that can be used for synthesizing many fluorinated compounds. This paper described the different synthesis methods of perflurobutadiene from different materials, and contrasted the characteristic of each synthetic method. The route from tetrafluoroethylene has more industrialization prospects...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52328#.VJDbxcnQrzE Author(s) Reda M. Abdel-Rahman , Mohammed S. T. Makki , Abeer N. Al-Romaizan * Affiliation(s) Department of Chemistry, Faculty of Science, King Abdul Aziz University, Jeddah, KSA . ABSTRACT Novel 6-(5’-fluoro-2’-diphenylphosphorylanilido)-3-hydrazino-1,2,4-trizin-5 (2H) one (3) is achieved from hydrozinolysis of the corresponding 3-thioxo-analoges 2. Compound 2 is also obtained from phosphorylation of 6-(5’-fluoro-2’-aminophenyl)-3-thioxo-1,2,4-triazin-5(2H) one (1). Novel fluorine substituted isolated and/or fused heterobicyclic nitrogen systems bearing and/or containing, 6-phosphoryl anilido-1,2,4-trizin-5 ...