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Thermal Expansion and Electrical Conductivity of the Nd1xSmxBa2ySryCu3O7d Cuprates Solid Solutions at Elevated Temperatures Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201422 Andrey I. Klyndyuk[1], Alexander A. Savitsky[2] Page no. 1-10 1 It has been found that Nd1xSmxBa2ySryCu3O7d solid solutions at substitution up to 62,5 mol. % of barium by strontium at any substitution degree of neodymium by samarium are formed. The crystal structure parameters of Nd1xSmxBa2ySryCu3O7d cuprates have been determined and their oxygen nonstoichiometry, thermal expansion and electrical conductivity within 3001100 K have been investigated. On the dilatometric curves of cuprates (a = f(T), Dl/l0 = f(T)) near 450550, 800 and 1000 K the anomalies have been observed, which are connected with change of ordering degree and concentration of oxygen vacancies in the CuO1dlayers of the crystal structure of Nd1xSmxBa2 ySryCu3O7d phases. It has been found that electrical conductivity activation energy of Nd1xSmxBa2 ySryCu3O7d at d increasing in tetraphase (d 0,5) increased stronger than in orthophase (d 0,5). Keywords: Layered perovskites, high-temperature superconductors, solid solutions, crystal structure, existence region, thermal expansion, electrical conductivity. http://www.scientiaresearchlibrary.com/archive-abs.php?arc=168http://www.scientiaresearchlibrary.com/archive/JAC-2014-2-2-028-1-10.pdf

Removal of Refractory Contaminants Wastewater Using Biological Treatment Followed by Photocatalytic Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201422 Eman A. Emam[1], S.-U. Geissen[2] ,A. Vogelpohl[3] Page no. 11-21 1 Biological treatment is considered environment-friendly and relatively cheap, but the complete removal of different contaminants is questionable. Photocatalytic process is widely used for the removal of refractory non-biodegradable compounds from industrial and municipal wastewater. Photocatalytic process has been investigated to purification of the refractory contaminants real wastewater after two steps of an aerobic biological treatment. The activities of three commercial types of titanium dioxide (TiO2) photocatalysts (Degussa P25, Hombikat UV-100 and Millennium PC 50) were studied. In addition, TiO2-concentration was investigated using an aerated photoreactor which was modified for batch experiments. After biological treatment the total organic carbon (TOC) degraded from 28 to 11 mg/L. The remaining of the hydrocarbon content was found 4.6 mg/L. Additionally, the biochemical oxygen demand (BOD5) to chemical oxygen demand (COD) ratio less than 0.02, the biological treatment was assumed to be complete. The results of photocatalytic treatment showed that, the TOC in the wastewater is able to remove with different photocatalysts, but at different reaction rates. Degussa P25 was more active than UV-100 and PC 50 photocatalysts with TOC degradation reached 83%. The degradation rate of TOC was increased with increasing P25 photocatalyst concentration up to 5 g/L. The degradation rate of the TOC in the wastewater was found to be pseudo first order and the maximum rate was achieved with P25. Reduction of 88 % of hydrocarbon content was achieved by P25. Keywords: aerobic biological, photocatalytic degradation, titanium dioxide, gas-station wastewater, hydrocarbon content http://www.scientiaresearchlibrary.com/archive-abs.php?arc=169http://www.scientiaresearchlibrary.com/archive/JAC-2014-2-2-029-11-21.pdf

Local electron states in ellipsoidal semiconductor nanosystems in homogeneous magnetic fieldThis is some sample text. Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201422 Sergey I. Pokutnyi Page no. 22-30 1 The influence of a homogeneous magnetic field on the electron states localized over the surface of an ellipsoidal semiconductor (dielectric) nanoparticle by the electrostatic image forces is studied theoretically. The effects of the resonant interaction of light with such local electron states in presence and in absence of a homogeneous magnetic field are investigated. Keywords: local electron states, ellipsoidal nanosystems, homogeneous magnetic field, resonant interaction. http://www.scientiaresearchlibrary.com/archive-abs.php?arc=170http://www.scientiaresearchlibrary.com/archive/JAC-2014-2-2-030-22-30.pdf

Bioactivity of Active Extracts of The Root And Stem Bark of (Detarium microcarpum) Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201422 H.M. Adamu[1], O.A.Ushie[2] B. D.Longbap[2] ,R.J Kuburat and U. Lawal [2] Page No. 31-39 1 Bioactivity of the acetylated extracts of the root and stem bark of Detarium mirocarpum was done. The procedure employed includes extraction of the bark and root of the plant with different solvents in order of polarity; hexane, acetone, methanol and water, solvent- solvent purification method was carried out for further purification of the extract using different solvents in order of increasing polarity; hexane, methyl acectate, dichloromethane, acetone, and methanol. Acetone and methanol extract were acetylated and were test on some microorganisms to determine the activity of the acetylated extracts. http://www.scientiaresearchlibrary.com/archive-abs.php?arc=171http://www.scientiaresearchlibrary.com/archive/JAC-2014-2-2-031-31-39.pdf

Phytochemical Screening of (chrysophyllum albidum) Leaf Extracts Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201422 O.A.Ushie[1] ,H.M. Adamu[2] ,O.J. Abayeh[2] ,I.Y. Chindo[2] ,U. Lawal[1] Page No. 40-46 1 Chrysophyllum albidum is a medicinal plant used for different diseases. The present work was aimed to screen this medicinal plant for phytochemical studies. The method of cold maceration was used in the extraction by serial exhaustive extraction method which involves successive extraction with solvents of increasing polarity from a non polar (hexane) to a more polar solvent (methanol) to ensure that a wide polarity range of compound could be extracted. Extracts of Leaf of C. albidum revealed the presence of flavonoids, phenols, glycosides, terpenoids, saponins, steroids and alkaloids in methanol extract and absence of anthraquinone, tannins, glycosides extract. The phytochemical compounds identified known to be bioactive and have been confirmed have medicinal as well as physiological activity and therefore could be said to be responsible for the efficacy of the leaves of the plants studied in treatment of different ailments. These classes of phytochemical compounds are known to show curative activity against several bacteria and it is not surprising that these plant extracts are used traditionally by herbalist to cure bacteria related illhealth. The plant extracts could therefore be seen as a potential source for useful drug and the continued traditional medicinal use of these plants is therefore encouraged. http://www.scientiaresearchlibrary.com/archive-abs.php?arc=172http://www.scientiaresearchlibrary.com/archive/JAC-2014-2-2-032-40-46.pdf

Biomass Based Organic Rankine Cycle: Thermodynamic Modeling for 20 kW Power Output Electricity Using R227ea and Toluene as Working Fluids Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201422 Suresh Baral Page No. 47-54 1 The biomass based organic Rankine cycle of the 20 kW power output has been investigated and thermodynamically modeled with the basic laws of thermodynamics. The two working fluids selected for modeling which are R227ea and Toluene. The ORC system has efficiency 10.9 % and 11.1 % in addition to the heat input to the boiler is 186.1 kW and 178.45 kW when boiler inlet temperature is 85 C with R227ea and Toluene respectively. The thermal efficiency, pressure ratio, mass flow rate of working fluids and boiler heat input varies according to the boiler input temperature. This paper examines the variation in thermodynamic parameters when subjected to change in temperature of working fluids. Keywords: Biomass, Thermal efficiency, boiler heat input, working fluids. http://www.scientiaresearchlibrary.com/archive-abs.php?arc=173http://www.scientiaresearchlibrary.com/archive/JAC-2014-2-2-033-47-54.pdf

Preconcentration trace amount Co(II) by carbon nanotubes in water samples and determination it by FAAS Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201422 Ali Moghimi Page No. 55-64 1 A simple method has been developed for the preconcentration of Co(II) based on the adsorption of its Schiffs Naphtol-2-(Pyridylazo-2)-1 (PAN) complex on a Single walled carbon nanotubes (SWCNTs) onto C18 cartridge . The influence of acidity, eluting agents, stability of the cartridge, sample volume and interfering ions has been investigated in detail. The adsorbed complex could be eluted using HNO3 4M and the concentration of Co(II) was determined by flame atomic adsorption spectrometry (FAAS). A detection limit of 0.10 gL-1 could be achieved and the developed procedure was successfully applied for the determination of Co(II) in spiked water samples . The preconcentration factor attainable for quantitative recovery (97%) of Co(II) was 125 for a 1000mL sample volume. The mentioned method was successfully applied on the determination of Co(II) in different water samples. In this method, relative standard deviation (RSD) is %1.25. Keywords: Co(II), Preconcentration, Solid phase extraction, Single walled carbon nanotubes (SWCNTs). Flame atomic adsorption spectrometry (FAAS). http://www.scientiaresearchlibrary.com/archive-abs.php?arc=174http://www.scientiaresearchlibrary.com/archive/JAC-2014-2-2-034-55-64.pdf

Anti-Radical Potentiality of The Extract Methanolique of The Bark of a Plant Used in Tradtional Medicine in Cote Divoire : FICUS EXASPERATA (MORACEAE) Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201422 Didier MOUHO, Zana OUATTARA, Herv ZABRI[1] Page no. 65-71 1 The purpose of the present study is to highlight the antioxidant character of the barks of Ficus exasperata ( MORACEAE) what could justify in party its utility in traditional medicine. In addition to that the antioxidizing potentiality was proved by the test to the DPPH. The CCM which ensues from this test showed the existance of antioxidizing molecules. In the mixture of solvent dichloromethane/ethyl acetate/methanol (75/10/20), five compound made up of Rf equal to 0,17, 0,28, 0,50, 0,70 and 0,77 would be molecules with anti-free radical potentiality. Keywords : antoxydant. CCM. Ficus exasperata. DPPH http://www.scientiaresearchlibrary.com/archive-abs.php?arc=175http://www.scientiaresearchlibrary.com/archive/JAC-2014-2-2-035-65-71.pdf

Studies on Mechanical Properties of ABS NYLON 66 POLYBLENDS Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201422 Mahendra sinh M Raj Page no. 72-76 1 Polymer blends are capable of providing materials which extend the useful properties beyond the range that can be obtained from single polymer equivalents. Blends of Acrylonitrile-Butadiene- Styrene (ABS) and Nylon 66 were prepared in different ratios in presence of styrene meleic anhydride copolymer as a compatibilizer by melt blending technique which was carried out using an extruder which was followed by injection moulding process. Nylon 66 at different weight ratios was incorporated into the blends to study the effects of blend ratio on the properties of the blend. This study focused upon tensile, flexural, and impact properties of ABS Nylon 66 polymer blends. Key Words: Polymer blends, Nylon 66, ABS, mechanical properties http://www.scientiaresearchlibrary.com/archive-abs.php?arc=176http://www.scientiaresearchlibrary.com/archive/JAC-2014-2-2-036-72-76.pdf

Green Chemistry; Sustainablity An Innovative Approach (Green Chemistry and Sustainability) Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201422 Alok Singh[1], Savita Singh[1a], Neetu Singh[2] Page no. 77-82 1 Green chemistry is an approach to the design, manufacture and use of chemical products to intentionally reduce or eliminate chemical hazards. It focuses on the reduction, recycling/ elimination of the use of toxic and hazardous chemicals in production processes by finding creative, alternative routes for making the desired products that minimize the impact on the environment. Sustainable economic growth requires safe, sustainable resources for industrial production. This article describes an introductory account of the basic tanets on which the concept of the Green Chemistry is based. Key Words: Green chemistry, environmental chemistry, feedstock, analytical chemistry, sustainability, metathesis . http://www.scientiaresearchlibrary.com/archive-abs.php?arc=177http://www.scientiaresearchlibrary.com/archive/JAC-2014-2-2-037-77-82.pdf