Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53729#.VNB3cCzQrzE Author(s)    Ahmed H. A. Dabwan 1* , Nakane Yuki 2 , Nur Amni Mohd Asri 1 , Hideyuki Katsumata 2,3 , Tohru Suzuki 3,4 , Satoshi Kaneco 2,3,4   Affiliation(s) 1 Faculty of Chemical Engineering Technology, Tati University College, Terengganu, Malaysia . 2 Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Mie, Japan . 3 Mie Global Environment Center for Education & Research, Mie University, Mie, Japan . 4 Research Center of Process for Environmental Load Reduction, Mie University, Mie, Japan . ABSTRACT The present work was done in order to develop and find out suitable conversion methods for coconut husk wastes into value-added products. It is well-known that coconuts husk waste is hydrophobic therefore ethanol with different doses was used as a surfactant to enhance the removal efficiency. Trea...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53300#.VLydhcnQrzE Author(s)    Ashraf M. Mahmoud 1,2* , Noha N. Atia 1 , Salwa R. El-Shabouri 1 , Wesam M. El-Koussi 1   Affiliation(s) 1 Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt . 2 Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, KSA . ABSTRACT Simple and sensitive stability-indicating high performance thin layer chromatography (HPTLC) assay was developed and validated for quantitative determination of the antibacterial drug, gemifloxacin mesylate (GFX) in presence of its degradation products and ambroxol hydrochloride. The chromatographic separation was performed on HPTLC precoated silica gel plate 60F 254 as stationary phase. The mobile phase consisted of a mixture of ethyl acetate: methanol: 25% ammonia, (8:4.5:3, v/v/v). The detection was ...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53266#.VLiDt8nQrzE Author(s)    Nour T. Abdel-Ghani 1 , Ghadir A. El-Chaghaby 2* , Enas Mohamed Zahran 3   Affiliation(s) 1 Chemistry Department, Faculty of science, Cairo University, Cairo, Egypt . 2 RCFF, Agricultural Research Center, Giza, Egypt . 3 Holding Company for Water and Wastewater, Greater Cairo Water Company, Cairo, Egypt . ABSTRACT The adsorption of aluminium(III) and iron(III) ions from their single and binary systems, by RHAC was investigated in a batch system. The activated carbon prepared from rice hulls was characterized by scanning electron microscopy and Fourier transformation infrared techniques. Batch adsorption experiments were performed under different operating conditions including pH (2 - 5), adsorbent dosage (0.5 - 2.0 g/l), initial ion concentration (5 - 100 mg/l), and contact time (30 - 240 min). The equilibrium time f...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52968#.VK3xYMnQrzE Author(s)   Jude O. Ighere , Karina Honjoya , Ramesh C. Chawla Affiliation(s) Chemical Engineering Department, Howard University, Washington DC, USA . ABSTRACT This paper discusses the toxicity and mobility of chromium species. And it presents the extent and kinetics of reductive remediation of hexavalent chromium, Cr + using ferrous ion, Fe 2+ . Molar ratios of 1:3 and 1:6 of Cr (VI) to Fe (II) were used. Integral method of data analysis showed reaction followed second-order kinetics with R square values near unity. Reaction was initially fast but with a rapid precipitation attributed to Cr (III)-Fe (III) in previous studies. This colloidal precipitate ultimately stops the reaction, which explains while conversion efficiency increases with increased molar ratio of Cr (VI) to Fe (II). The impact of pH was investigated by adjusting the C...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=51325#.VGRwqGfHRK0 Author(s) Sven C. Lehmann 1 , Andy Maraite 2 , Max Steinhagen 3 , Marion B. Ansorge-Schumacher 3* Affiliation(s) 1 Department of Biochemistry, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany . 2 PS Biotech GmbH, Aachen, Germany . 3 Institute for Microbiology, Technische Universität Dresden, Dresden, Germany . ABSTRACT The search for new enzymes is facilitated by the rapidly growing number of genome sequences from different organisms. However, the discovery of functional proteins is still time intensive and complex alignments have to be performed. Herein, a genome database search identified a new, un...