bluuebunny/crossref_metadata_2025 huggingface dataset:
Excitonic quasimolecules in nanosystems containing quantum dots
Authors: I.Pokutnyi Sergey , Salejda Wlodzimierz
Published: May 2018

The possibility of occurrence of the excitonic  quasimolecule formed of spatially separated electrons and holes in a nanosystem that consists  of  CuO quantum dots synthesized in a silicate glass matrix. It is shown that the major contribution to the excitonic quasimolecule binding energy is made by the energy of the exchange interaction of electrons with holes and this contribution is much more substantial than the contribution of the energy of Coulomb interaction between the electrons and holes.
Electrochemical performance of Mo2C@PtRu synthesized by electrochemical deposition method on methanol oxidation
Authors: Nestor Uwitonze , Chen Wei , Chen Yan-Xia
Published: May 2018

The electrodeposition of Platinum and Ruthenium nanoparticles into Molybdenum carbide/ glassy carbon electrodes and their catalytic activity for the oxidatlon of methanol are described. These Mo2C@PtRu electrodes exhibit good activity with respect to the catalytic oxidation of methanol. The electrodes exhibited excellent long term stabilty in the acidic methanol solutions.
Practical Physiology Power Lab. Experiments For Medical Students
Authors: Shokr Elsayed
Published: May 2018

With recent advances in the fielded of human physiology, it has become urgent to provide an up to date review in the subject of Power Lab instrument.This book to help medical student in understanding the human physiology and how to measure the all physiological parameters with the Power Lab instrument. It presents the whole subject in brief comprehensive and up to date form.We hope this book will be a real help to undergraduate medical students, as well as to postgraduate and candidates of higher degree, in the field of human physiology
Spectrophotometric Determination of Cu2+ Metal Ions via Complex Formation with Carboxylated Tris(2-aminoethyl)amine
Authors: Odeh Imad , Shqair Ibrahim Abu , Shakhshir Ziad M , Masharqah Julnar , J Jondi Waheed
Published: May 2018

An aminopolycarboxylic acid chelating agent; tris(2-aminoethyl)aminehexaacetic acid (TAHA) was prepared and characterized. TAHA formed stable complexes with Cu(II) ions and other metal ions at pH 10. The complexation behavior was studied by spectrophotometry at the complex maximum wavelength. Mixtures of Cu(II) and other metal ions (M2+; Ca2+, Co2+, Ni2+, Cd2+)were titrated with TAHA at pH 10. The stoichiometry of ligand - to - metal was found to be 1:1. The stability constant of Cu(II)–TAHA complex was determined to be 1.86×105 by using the continuous variation method. Beer’s law was obeyed over the concentration range 3.0×10–4 M – 1.2×10–2 M for Cu(II) solution. The results of the quantitative determination of Cu(II) gave LOD and LOQ values of 7.285×10–6 M and 2.428×10–5 M respectively. The percent relative standard deviation (%RSD) for five replicate samples was found to be 1.088% and 4.804% for Cu(II) concentrations of 1.2×10–2 M and 3.0×10–4 M respectively.
Encapsulation of an antifungal agent within biodegradable polymers: composition effect
Authors: Yammine Paolo , Kassab Rima , Moussa Dima
Published: May 2018

Polylactic acid and poly(lactic-co-glycolic acid) are two aliphatic polyesters commonly used in drug delivery systems. Having a hydrophobic nature, they could be used for the encapsulation of hydrophobic drugs such as Amphotericin B. Drug-loaded microspheres were prepared using solvent evaporation by changing the ratio of Polylactic acid to poly(lactic-co-glycolic acid) in the organic mixture. Results showed that higher drug encapsulation and drug loading values were seen for formulations having higher lactide content. This had also influenced the drug release rate which was slower at higher lactide percentage. Microspheres, which were spherical in shape and porous in structure, had homogeneous particles sizes ranging between 100 and 300 µm. At last, FT-IR spectra recorded in this study revealed a stable character of both polymer and drug after microencapsulation.
Kinetic studies of adsorption of Fe(III) from aqueous solution by untreated and alkali-treated rice straw
Authors: Elfeky Ahmed Samir , Swelam A.A. , Awad M.B. , El-Feky A.S.
Published: May 2018

Modifications of rice straws surfaces by sodium hydroxide (NaOH) were carried out in order to study the effects of this on the surface functional groups properties. Comparison was made between untreated and alkali-treated rice straws on the removal of Fe(III) from aqueous solution. In this study, four characterizations of raw rice straw have been conducted. The morphological characteristics by Scanning Electron Microscope (SEM), Energy Dispersive X-ray Analysis (EDXA)the functional group present in the rice straw by Fourier Transform Infrared (FTIR) spectroscopy and the X-ray Diffraction (XRD). The result of Scanning Electron Microscopy (SEM) also shows that rice straw is a porous material. Rice straw contains on –OH functional group that can bind with metal ions. To be able to enhance the sorption capacity of rice straw in metals, removing from waste water, alkali treatment should be done. This shows that rice straw can be used as adsorbent for ferric ions removing from wastewater.The effect of pH, sorption kinetics and isotherms were studied in batch experiments. The good correlation coefficient was obtained from pseudo second-order kinetic model, which agreed with conception as the rate-limiting mechanism. Sorption isotherm test showed that equilibrium sorption data were better represented by Temkin model. The highly efficient, low cost and the rapid uptake of Fe(III) by untreated (RS) in comparison with alkali-treated (MRS) rice straws, indicated that it could be an excellent alternative for the removal of ferric ions by sorption process.
Uptake of divalent manganese from aqueous solution using cation exchange resins
Authors: Ahmed Ayman Abdallah
Published: May 2018

The present work deals with the removal of highly toxic manganese ion from aqueous solution using cation exchange resins namely, Amberjet 1500H, Amberjet 1300H and Amberlite IRC86. The study was carried out in media of various ionic strengths (1.98-9.98 mmol/L), different resin dose (0.25-8.0 gm) and a wide solution acidity range (0.001-1.0 M), in addition to at three temperatures (293-318 K).The aim of this study was to understand the mechanisms that govern manganese removal and find a suitable equilibrium isotherm and kinetic model for the manganese removal in a batch reactor. The experimental isotherm data were analyzed using the Langmuir, Freundlich, Temkin and Dubinin–Radushkevich (D–R) equations. The experimental data were analyzed using four adsorption kinetic models – the pseudo first- and second-order, intraparticle diffusion and the Elovich equations – to determine the best fit equation for the adsorption of manganese ions onto the resins. The rate constants, equilibrium capacities and related correlation coefficients for each kinetic model were calculated and discussed. Also, predicted qt values from the kinetic equations were compared with the experimental data. Thermodynamic parameters, involving ΔH, ΔS and ΔG were also calculated from graphical interpretation of the experimental data
Efficient Microwave-Assisted Solvent-Free Synthesis and Molecular Docking Studies of 2-pyridone derivatives as Anticancer Agents and Evaluation of Cytotoxic Effects
Authors: Abdellattif Magda Hassan
Published: May 2018

Introduction: A green protocol will be used to synthesize a novel series of 3-cyano-5- arylazo-pyridones (9a-c) and (10d-i). Methodology: Structures of the new products will be confirmed on the basis of spectroscopic data (FT-IR, 1D, NMR) as well as alternative synthetic routes, anticancer cell-line will be investigated and also molecular docking studies will be applied. Results: The activity against different cancer cell-line will be studied. Compounds with electron withdrawal group showed the highest activities.
Fast, Efficient and Environmentally Friendly Extraction of Cu(II) and Zn(II) by Hybrid Silicas Impregnated with Acidic Organic Extractants
Authors: Miloudi Hafida , Mehyou Zeina , Boos Anne , Tayeb Abdelkader , Goetz-Grandmont Geneviève
Published: May 2018

The extraction of copper and zinc by mesostructured silicas impregnated with organic acidic chelators, an acylisoxazolone 3-phenyl-4-benzoyl-5-isoxazolone (HPBI), an acylpyrazolone 1-phenyl-3-methyl-4-stearoyl-5-pyrazolone (HPMSP) and an organophosphoric acid di-(2-ethylhexyl)-phosphoric acid (DEHPA) was performed in a sulfate medium. Various factors such as the pH of the aqueous phase, the chelators’ concentration in the silica matrix, the extraction equilibrium time and the extraction capacity of the two cations on silica were studied. The cations were extracted at very acidic pH with very high extraction rates. The stripping of cations was achieved at pH’s that were more acidic than those utilized for the extraction by maintaining the structure intact. Finally, their separation was successfully conducted in the cases of the three chelators.
Synthesis of some Heterocyclic compounds bearing Coumarin nucleus and their Anti-inflammatory activity
Authors: T. A. Dawoud1 Nadia , F.Abdel-Ghaffar Nahed. , Abdl-gali Mona M , Soliman Fekria M. A. , Zaki Heba M
Published: May 2018

Starting from 6-amino-4-methyl-2H-chromen-2-one 1, a series of some new heterocyclic compounds (2-14) incorporating coumarin moiety was synthesized and assessed for their anti-inflammatory activity using the carrageenan-induced hind paw edema method. The tested coumarin derivatives reduce the edema volume and serum levels of the pro inflammatory cytokines, IL-6 and TNF-α, and have effects on promoting production of anti-inflammatory cytokine, IL-10.
Extraction-Atomic-Absorption Determination of Germanium with 2Hydroxy-5-T-Butylphenol-4-Methoxy-Azobenzene
Authors: Pashajanov A.M.
Published: May 2018

The interaction of germanium with 2-hydroxy-5-T-butylphenol-4-methoxy-azobenzene (HR) was studied. Optimum values of pH of solution are 3.5÷4.0. Maximum light absorbance of the complex in n-butanol is in the range of 470÷480 nm. Chloroform, dichloroethane, carbon tetrachloride, benzene, toluene, xylene, hexane and n-butanol were tested for extraction of the complex. The most effective extractant was found to be n-butanol used in further studies. Absorption spectrum indicates the formation of one complex.  Ratio of components in the complex under optimum conditions were found by method of equilibrium shift and straight-line method of Asmus, they are equal to Ge:HR = 1:2. Selectivity of extraction-atomic absorption determination of germanium was studied by using HR. Molar absorption coefficient equals to (4.0±4.2)·104. Beer’s law was observed at concentrations of germanium 1÷10 mkg/ml. Stability constant of germanium in n-butanol was found to be βк=3.4·106. Calibration curve was linear at concentrations of germanium 1÷10 mkg/ml. Selective and sensitive techniques of extraction-atomic absorption determination of germanium in different regions were developed.
Implementation,Simulation of Four Switch Converter Permanent Magnet Brushless DC Motor Drive for Industrial Applications
Authors: Shanmugam Sathishkumar , Loganathan Anbarasu , Kanakarajan Krishna kumar , Krishnan Parimala , Subramaniam Aruna
Published: May 2018

This Research paper proposes a low cost four switch three phase inverter (FSTPI) fed brushless DC (BLDC) motor drive for Active power factor correction for residential applicationswith out environmental issues. This proposed system is simplified the topological structure of the conventional six switch three phase inverter (SSTPI) and includes an active power factor correction in front end rectifier which results in sinusoidal input current and it closed to unity power factor. In this project a new structure of four switch three phase inverter with reduced number of switches for system is introduced. This system consists of single phase rectifier and four switch three phase inverter. This proposed inverter fed BLDC motor used in Sensorless control schemes. To improve sensorless control performance, six commutation modes based on direct current controlled PWM scheme is implemented to produced the desire Torque-Speed characteristics. This four switch three phase inverter is achieved by the reduction of switches, low cost control and saving of hall sensor. The design and implementation of low cost four switch inverter for Brushless motor drive with active power factor correction  have been conducted successfully and valediction  of the proposed sensorless control for four switch three phase inverter fed BLDC motor drive is developed and analysed using both  MATLAB/SIMULINK and hardware results  are verified out successfully.
Influence of Ethanol with Karanja Oil on Exhaust Gas Emissions from a Variable Compression Ratio Engine
Authors: Murthi M.K. , Nithiyanandam S. , Srinivasan PSS.
Published: May 2018

Biodiesel is an alternative choice for diesel and have benefits over diesel because, it is renewable, biodegradable, sulfur free, and non-poisonous in nature and less exhaust emissions. The transesterification process is used to reduce the viscosity of the karanja oil. The aim of this paper is to examine the emission parameters under variable compression ratios (17 and 18) in a VCR diesel engine which runs using karanja oil 20% (B20) and ethanol as an additive by adding 5% and 10% at constant speed of 1500 rpm with variable loads. The outcomes of these blends have been compared with the normal diesel. The influences of compression ratios on exhaust gas emissions were investigated. The exhaust emissions, namely hydrocarbons, NOx, carbon monoxide and carbon dioxide are found to be reduced when compared with diesel.
Effect of Ni doping on structural, optical and photocatalytic properties of Zn1-XNiXO nanoparticles prepared by different pH conditions
Authors: Jeyachitr R. , Sriharan N. , Senthilnathan V. , S. Senthil T.
Published: May 2018

Zn1-XNiXO (x = 0.00, 0.02, 0.04 & 0.06 mol %) nanoparticles were prepared by simple co-precipitation method. The influences of Ni doping on structure, morphology, optical and photocatalytic properties were investigated by means of Xray diffraction, scanning electron microscopy, UV–Vis spectrophotometer and photochemical reaction method. The obtained result shows that the prepared ZnO nanocrystals were hexagonal wurtzite structure and the average crystallite size decreases with increase of Ni doping. The increase of visible light absorption and increase of band gap were found with the increase of Ni doping concentration, which enable the sample harvest more photons to excite the electron from valence band. The photocatalytic properties of Ni doped ZnO nanocrystals shows enhanced activity that the pure ZnO nanocrystals. The photocatalytic activities were not significantly affected by the particle size and 0.04% Ni doped ZnO nanocrystals shows best catalytic activity than the other catalysts.
Efficient Synthesis of Î±-Oximinoketones using Carboxyl and Nitrite Functionalized Graphene Quantum Dots: Dual role of Nanostructure as a Catalyst and Reagent
Authors: Shomali Ashkan , Valizadeh Hassan
Published: May 2018

Carboxyl and nitrite functionalized graphene quantum dots (CNGQDs) was used for the efficient synthesis of Î±-oximinoketones under free mineral acid conditions at room temperature. CNGQDs was prepared via o-nitrozation of carboxyl and hydroxyl graphene quantum dots (CHGQDs) and used as a nitrosonium source and also as an efficient acidic catalyst for the synthesis of Î±-oximinoketones. The structure of the catalyst was characterized by FT-IR, XRD, TGA and photoluminescence techniques. The structures of the synthesized products were confirmed by FT-IR, 1H-NMR and 13C-NMR spectroscopic techniques. Stability and recyclability of the prepared homogeneous catalyst was studied in details. Reaction times and yields of the products were compared with previous reported methods resulting high yields and also shorter reaction times.
Antibacterial activity of coumarine derivatives synthesized from 4-amino7-chloro-2-oxo-2H-chromen -3-carbaldehyde and comparison with standard drug
Authors: Behrami Aziz , Vaso Kozeta
Published: May 2018

In present paper , we report the organic syntheses of three compounds from 4-Amino-7-chloro -2-oxo-2H â€“chromen -3carbaldehyde and describe the results of antibacterial activity of purified compounds.7-Chloro-4-[(2-hydroxy-benzylidene)amino]-2-oxo-2H-chromen-3-carbaldehyde(1a).4-[(2-Hydroxy-benzylidene)-amino]-7-(4-hydroxy-phenylamino)-2-oxo-2Hchromen-3-carbaldehyde (2a) ,([4-[(2-Hydroxy-benzylidene)-amino]-7-(4-hydroxyl-phenylamino)-2-oxo-chromen-3ylmethylene]-amino)-acetic acid (3a),have been synthesized and characterized using melting points , IR spectra , 1H-NMR and 13C-NMR spectra. The antibacterial activity of synthesized compounds and streptomycin and cefalexine at concentractions of 2mg/ml, 3mg/ml and 5mg/ml , have been evaluated against three strains of bacterial culture; Staphylococcus aureus, E.coli and Bacillus cereus. The compounds show bacteriostatic and bactericidal activity.
D/L arabinitol Ratio as an Indicator of a Healthy Lifestyle. A preliminary Study
Authors: Czaplińska Joanna Kałużna , Grys Wioletta , Jędrzejczyk Tomasz , Rynkowski Jacek
Published: May 2018

D-arabinitol, as opposed to the L-arabinitol, is produced by fungi of the genus Candida. The increasedD/L-arabinitol ratio in body fluids is a recognized biomarker of systemic fungal infection . The factors which increase the risk of candidiasis include: sugar and confectionery, sweetened sodas, alcohol, beer, coffee, black tea, red meat, refined flour products, tobacco and salt. Often, vitamin deficiencies are caused by candidiasis of the colon. The D/L ratios in urine were determined by gas chromatography with electron capture detection (GC-ECD). For 21 examined students a questionnaire survey related to their healthy lifestyle was conducted. The lower D/L ratio in the urine of students declaring regular intake of vitamin supplements and daily consumption of fruits and/or vegetables to improve their immunity against diseases was observed. The D/ L ratio may be considered a potential indicator of a healthy lifestyle, especially in the case of young people.
Static and Dynamic Studies of Gasoline in View of its Octane Number and its Toxic Effect
Authors: El-Naggar Ashraf Yehia , A. Ebiad Mohamed
Published: May 2018

Gasoline come primarily from petroleum cuts, it is the preferred liquid fuel in our lives. Two gasoline samples of octane numbers 91 and 95 from Saudi Arabia petrol stations were studied. This study was achieved at three different temperatures 20oC, 30oC and 50oC representing the change in temperatures of the different seasons of the year. Both the evaporated gases of light aromatic hydrocarbons (BTEX) of gasoline samples inside the tank were subjected to analyze qualitatively and quantitatively via capillary gas chromatography. The detailed hydrocarbon composition and the octane number of the studied gasoline samples were determined using detailed hydrocarbon analyzer. The idea of research is indicating the impact of light aromatic compounds in gasoline on the toxic effect of human and environment on the one hand, and on octane number of gasoline on the other hand. Although the value of octane number will be reduced but this will have a positive impact on the environment as a way to produce clean fuel.
Molecular Interaction Studies in Ternary Liquid Mixtures of Quinoline at Varying Temperatures
Authors: Kavitha Ch. , Ratnakar Dr. A. , Narendra Dr. K.
Published: May 2018

Density r, Viscosity η, and ultrasonic velocity u, have been measured in pure Quinoline, o-cresol, m-cresol, p-cresol and methanol and in their ternary liquid mixtures with quinoline and methanol as common components at 303.15, 308.15, 313.15 and 318.15K over the entire range of composition. From these experimental data, various thermo-acoustic parameters such as excess molar volume VmE, excess ultrasonic velocity uE, viscosity deviation Δη and excess Gibb’s free energy of activation for viscous flow ΔG*E have been calculated. The deviation/excess parameters were plotted against the mole fraction of quinoline over the whole composition range. The observed negative and positive values of deviaiton/excess thermo-acoustic parameters were explained on the basis of intermolecular interactions present in these mixtures.
Colorimetric Method for Determination of some 1,4-Dihydropyridine Drugs in their Tablets and Capsules
Authors: A. El Hamd Mohamed , Derayeab Sayed M. , Abdelmageedc Osama H. , Askald Hassan F.
Published: May 2018

A simple, accurate and selective colorimetric method was developed and validated for determination of five 1,4-dihydropyridine drugs (1,4-DHP) using Tetrabutylammonium hydroxide reagent (TBAH). The proposed method was based on addition of TBAH to the studied drugs then produced yellow colors were measured spectrophotometrically. Different variables affecting the reactions conditions carefully studied and optimized and under the optimum conditions, Beer's law was obeyed in the concentration range of 2.50-40.0 µg/mL and the limits of detection were ranged from 0.750-1.956 µg/mL. The proposed method was successfully extended to pharmaceutical preparations tablets or capsules and the results which obtained were comparable with that obtained by the reference methods.
Structural and Electrical properties of ZnO Nanorod based dye sensitized solar cell
Authors: Krithivasan R. , Brahadeeswaran S. , Santha KR. , Krishnan S. Sampath
Published: May 2018

ThePreparation of nanorod involves simple and novel design of sol-gel process. Further, by using the prepared nanorods,working electrode will be prepared and it will be sensitized with ruthenium dye. A platinum coated FTO electrode will beused as a counter electrode. Dye sensitized solar cell will be assembled by using the working electrode and counterelectrode. FE-SEM and UV characteristics have been carried out at 250áµ’C, 350áµ’C&450áµ’C. The size and band gap ofnanorod at these temperatures has been found out to be 1Î¼m and 2.95eV, 200nm and 2.86eV, 100nm and 2.79eVrespectively. The power conversion efficiency and the fill factor have been obtained as 2.72% and 0.722 respectively.
DIC TEXTURING-ASSISTED ACCELERATED SOLVENT EXTRACTION OF ACTIVE MOLECULES OF POMEGRANATE PEEL
Authors: Allaf Karim , Elaydi Khaoula , Kamal Ibtisam , Bedoui Ahmed
Published: May 2018

The current work discusses the use of Instant Controlled Pressure Drop (DIC) as a pretreatment texturing stage intensifying phenolic compound extraction from South Tunisian Punicagranatum L. peels in both cases of conventional and Accelerated Solvent Extraction (ASE). Response Surface Methodology (RSM) allowed identifying the effects of DIC processing parameters on the yields of Total Phenol Compounds (TPC), Total Flavonoid (TF), Condensed Tannins (CT), and Hydrolysable Tannins (HT), and antioxidant capacities via 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical-scavenging capacity and ß-carotene-linoleic acid as responses. Comparative methods were used to evaluate DIC-textured and Raw samples. The results obtained confirmed that appropriate DIC-texturing improved both kinetic and yield of bioactive compound extraction using ASE from Punicagranatum L. peels. Extraction kinetics was studied through Coupled Washing-Diffusion CWD model. The effective diffusivity was identified and quantified ranged from 0.27 to 8.22 against 0.4710-10 m2s-1 for DIC textured and raw material (RM), respectively. DIC swelling enabled solid vegetal material matrix to expand and be more adapted to mass transfer thus increasing extractability of the phenol compounds. Scanning Electron Microscope SEM showed that DIC generated pores with an average diameter of 50 µm.
Multifunctional Semi-interpenetrating Superabsorbents from Graft Polymerization of Acrylic Acid on Cellulose in Presence of Fulvic Acid as Potential Slow Release Devices of Soil Nutrients
Authors: Essawy Hisham
Published: May 2018

Grafting polymerization of acrylic acid (AA) was undertaken onto cellulose powder (Cell) in presence of potassium fulvate (KF) to produce semi-interpenetrating network structures. The grafting efficiency (GE) and grafting yield (GY) were studied as and indicated that the grafting process was not influenced in presence of KF. KF was expected to be incorporated into the cellulose backbone in the same course of the graft polymerization via polycondensation with groups from cellulose and monomer. The simultaneous graft polymerization of acrylic acid and polycondensation processes of all components allows formation of a more chemically active semi-interpenetrating network structure. Successful incorporation of KF to the network structure was predicted from fourier transform infrared spectroscopy (FTIR) while enhanced Cu2+ uptake confirmed the better chemical activity with respect to the same network prepared in absence of KF. Furthermore, the wide variation of the swelling potential as a function of the pH further corroborates the insertion of KF to the network structure. Imaging with scanning electron microscopy (SEM) indicated morphological alteration on the surface which might be related to the KF anchoring to the cellulose backbone. The developed superabsorbents showed increment in the water absorption both in distilled water and salted solutions as well. The newly developed superabsorbent was applied as a support for soil nutrients and their controlled release in soil was studied. The results proved efficiency of the superabsorbent to warrant appropriate release of the nutrients according to the time regulations set by European Committee of Normalization (ECN). Improved water retention was also an additional advantage.
Power Efficient MAC Unit Based Digital PID Controllers
Authors: Kavitha V. , Mohanraj S.
Published: May 2018

Proper closed loop has been an ever hot issue in the automotive industry. The industrial equipments governed by PID controllers have very simple control architecture and efficiency but still they find a trouble dueto large power consumption and slow mathematical computation. Many researchers have worked out and are trying to design a low power, less delay PID. This paper reviews three MAC architectures with array, booth and wallace tree multipliers incorporated in PID architecture. The simulations are done and the area, power, delay results are synthesized using Xilinx ISE. Comparisons are made between these three architectures in terms of power delay product and area delay product.
Growth and Characterization of an Organic Nonlinear Optical Crystal: 1-Iodo-3-Nitrobenzene (INB)
Authors: Kumar S.Vijaya. , Srinivasan P. , Dinagaran S. , Balaji J.
Published: May 2018

The 1-Iodo-3-Nitrobenzene crystal was grown by the slow evaporation method from ethanol solvent. The crystalline structure was identified by powder X-ray diffraction (PXRD). The presence of various functional group of the title material was examined by FTIR analysis. The UV-Vis absorption was carried out which shows the fundamental cutoff wavelength around 390 nm and there is no absorption in the entire visible region 390 nm to 1100 nm. The mechanical strength of the grown crystal was measured by Vicker’s microhardness tester. The thermal toughness of the grown crystal was observed by TGA-DTA and DSC studies. The electrical conductivity of the grown crystal is confirmed by dielectric measurement. The nonlinear optical character was assessed by Kurtz-Perry powder technique. This would propose that 1-iodo-3-nitro benzene crystal is a potentially capable in nonlinear optical applications.
Soft Computing Based Cavity Temperature Control of Plastic Injection Molding system
Authors: Suji Prasad S. J.
Published: May 2018

The plastic parts having complex three dimensional structures are produced by Plastic injection molding system. Thequality of the product is determined by controlling the temperature of the mold cavity. The mold cavity temperature controlwith the conventional ON/OFF, PI, and PID controllers have several disadvantages. This paper proposes the method toreduce settling time and undershoot in cavity temperature control with selected evolutionary algorithms. The controllerparameters are optimized with Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) Algorithm for PID and I-PDcontrollers by considering Mean Square Error (MSE) as fitness function. Compared to conventional methods theparameter optimization using soft computing methods such as GA and PSO improves the performance indices of PID andI-PD controllers.
OXIDATION OF BENZALDEHYDE BY QUINOXALINIUM DICHROMATE
Authors: Anbarasu K , GEETHA N.
Published: May 2018

The kinetics and mechanism of oxidation of benzaldehyde by quinoxalinium dichromate has been studied in the presence of perchloric acid in 70 % acetic acid - water medium. The reaction follows first order with respect to benzaldehyde, quinoxalinium dichromate and fractional order with respect to perchloric acid. There is no effect on the reaction rate with increase in ionic strength of the medium by adding sodium perchlorate. The rate of reaction increases with increase in the percentage of acetic acid. The reaction does not induce the polymerization with acrylonitrile. The rate of reaction decreases with increase in the concentration of manganoussulphate. The thermodynamic and activation parameters have been calculated and a probable mechanism has been proposed.
Cold Crack Susceptibility studies on High Strength Low Alloy Steel 950A using Tekken Test
Authors: Velumani Manivelmuralidaran , Sakthivel M. , Balaji M.
Published: May 2018

In This research article deals with the study of cold cracking susceptibility of High Strength Low Alloy Steel (HSLA) 950A using Gas Metal Arc Welding process (GMAW). The cold cracking is a general problem while welding HSLA steels. It thus becomes mandatory to have a novel method of welding to minimize the effects of cold cracking. The cold cracking tendency of the material is determined using the Y groove Tekken test and the test is carried out with DIN EN ISO 17642–2 standard. The welding of the base metal has been carried out using the low hydrogen electrode ER 70SD2. The test procedure is followed under self-restraint condition for determining cold cracking susceptibility of weld metal. Micro structural constituent of the weld metal plays an important role in determining the cold crack susceptibility of the weld metal. Hence an attempt has been made to impart the microstructure having high resistance to cold cracking.  It has been observed that Acicular ferrite microstructure in the weld metal increases the cold cracking resistance of the welded joint.  In the present study, the effect of preheating temperature on cold crack susceptibility analyzed by varying the preheating temperature 100ºC, 150ºC and acicular ferrite microstructure observed in the microstructure analysis of the welded specimen. The effect of microstructure on cold cracking has also been established. But due to very limited range of temperature, the effect of preheating temperature on cold crack susceptibility was inconclusive. But the formation of acicular ferrite microstructure will have greater influence on cold crack susceptibility. In future, effects of Nickel, Manganese and other alloying elements of the filler material in increasing cold cracking resistance can also be studied for far reaching prospects of the research.
EFFECT OF NANO-SiO2 PARTICLES ON PARTIAL DISCHARGE SIGNAL CHARACTERISTICS OF FR3 TRANSFORMER OIL
Authors: Prasad D. , Chandrasekar S.
Published: May 2018

Liquid insulation for high voltage transformer applications based on natural esters derived from abundantly available vegetable oils are becoming popular in recent times. Since these natural ester based oils have environmental advantages and superior thermal performance, electrical utilities are slowly replacing the conventional mineral oils with natural ester based vegetable oils. FR3 oil, which is a soya based natural ester oil with superior dielectric and thermal characteristics, is becoming popular as an alternate insulating medium for high voltage transformers. With recent developments in nanotechnology field, it is possible to enhance the dielectric performance characteristics of natural ester based oils, which is a major constraint for high voltage transformer applications. However few research reports are only available in the area of nanofluids based on natural esters for high voltage insulation applications. In depth analysis and collection of large data base of insulation performance of natural ester based vegetable oils is important to improve the confidence level over nano-fluids based on natural esters. Considering these facts, in the present work, partial discharge characteristics of  nano-SiO2 modified FR3 oil at different electrode configurations are investigated at different %wt filler concentrations. Important parameters such as partial discharge inception voltage, stable PD formation voltage, partial discharge amplitude at different voltage magnitude and PD signal frequency characteristics are evaluated. From the results, it is observed that the partial discharge performance of FR3 oil is significantly improved with the addition of nano-SiO2 filler. Since in recent times FR3 oil is commercially used in many transformers, these results will be useful for enhancing the dielectric strength of high voltage transformers.
Design, Molecular Modeling and Synthesis of Some New Purine-diones and Pyridopyrimidine-diones with Anticancer Activity
Authors: Hayallah Alaa M.
Published: May 2018

An olomoucine analogues of 2-[(1-substituted)-2,6-dioxo-2,3,6,7â€“tetrahydro-1H-purin-8-ylsulfanyl]-N-substituted acetamide 6a-g and 7a-g, 1-substituted-8-[2-(4-substituted phenyl)-2-oxoethylsulphanyl]-3,7-dihydro-1H-purine-2,6-diones 9a-g and 10a-g, 3-(2-substituted benzyl)-6-(4-substituted phenyl)-1H-thiazolo[2,3-f]purine-2,4-dione 11a-g and 12a-g and their isosteres 3-substituted benzyl-5-methyl-7-substituted-1H-pyrido[2,3-d]pyrimidine-2,4-dione 13a-c and 14a-c were designed and synthesized. The target compounds 11a-g and 12a-g were prepared by cyclodehydration of 9a-g and 10a-g in PPA, while 13a-c and 14a-c were synthesized by condensation of 6-amino-3-(2-substituted benzyl)-1H-pyrimidine-2,4-dione 1a or 1b and the appropriate acylacetone in glacial acetic acid. Structures of the new compounds were verified on the basis of their IR, 1H NMR, MS, HRMS and elemental analyses. The newly synthesized compounds were tested for their anticancer activity and most of the tested compounds showed good to excellent inhibition activity against the tested human breast cancer cell line MCF-7 in comparison to doxorubicin as a reference drug.

KEYWORDS: olomoucine; cyclin-depenent kinase; synthesis; anticancer
Ultrasonic and solvent free Synthesis of Regioselective Diastereomeric Adducts and Heterocyclic Products as antibacterial agent
Authors: El-Sayed Amira A. , A Maher , Hashash El- , Rizk Sameh A.
Published: May 2018

Oxirane ring containing the carboxylic group in the Î±,Î²-position are useful intermediates in the synthesis of biologically active compounds. Epoxidation of 4-(4-acetylamino and/or bromophenyl)-4-oxo-but-2-enoic acids via ultrasound condition afforded Î±-oxirane carboxylic acid followed by regioselective diastereomeric adducts of camphor. The steric factor plays an important role in regioselectivity. Formation of oxirane and furan derivatives via ultrasonic condition was considered as key steps for synthesis of some important heterocyclic compounds. The structure of new synthesized compounds 2-9a,b were elucidated by elemental analysis and spectroscopic data. The antibacterial activity for the synthesized compounds was evaluated.
Issues on Design of Piled Raft Foundation
Authors: M S Padmanaban , Sreerambabu J
Published: May 2018

A piled raft foundation consists of a thick concrete slab reinforced with steel which covers the entire contact area of the structure, in which the raft is supported by a group of piles or a number of individual piles. Bending moment on raft, differential and average settlement, pile and raft geometries are the influencing parameters of the piled raft foundation system. In this paper, a detailed review has been carried out on the issues on the raft foundation design. Also, the existing design procedure was explained.
Mathematical Modeling of Adsorption of Co2+ Ions on Sugarcane Bagasse
Authors: Taouil Hamid
Published: May 2018

The main objective of this work is to study the mathematical modeling of the adsorption of Co2+ ions on sugarcane bagasse (SCB) for approximate the nature of the adsorption. The together of results obtained show that the adsorption process is favorable for a chemisorption and monolayer. Also, the adsorption process is expressed by the second order kinetic law. Thus the negative values of Î”GÂ° and the positive values of Î”HÂ° opt for an endothermic and spontaneous process. Also, the positive values of Î”SÂ° indicate the increase in the randomness at the solid / liquid interface during the adsorption of the Co2+ metal ions.
Electrode Processes in Electrochromic Anodic Oxide Films on Niobium
Authors: Skatkov Leonid , Gomozov Valeriy , Tulskiy Gennadiy , Deribo Svetlana , Tulskaya Alena
Published: May 2018

We review the following issues: peculiarities of polycrystalline AOP development at niobium in nitrate salt melt at temperatures of Nb2O5 recrystallization, the mechanisms of change in structure and properties of niobium pentoxide in the result of electrode processes under cathodic polarization (at the model structure of polycrystalline film), as well as the methods of amorphous electrochromic AOP development and ways of electrochromic processes optimization at such films.
Modification of Acetyl Acetone with Methyl Acrylate
Authors: Asemave Kaana , Ahile U. J.
Published: May 2018

Acetyl acetone was modified by a KF/alumina mediated Michael addition reaction under solventless condition with methyl acrylate. Methyl acrylate formed single and double addition with the acetyl acetone. The optimal temperature for this reaction was 393 K. The modified Î²-diketones were confirmed using GC-FID and GC-MS. The products could be tested as metal chelating agents and in related applications.
Synthesis , Characterization and Biological activity of new derivatives of Chromen-2-one
Authors: Behrami Aziz
Published: May 2018

We report the organic syntheses of new derivatives  from Chromen-2-one and their  antibacterial activity. Compounds  4-[Acetyl-(2-oxo-2H-chromen-4-yl)-amino]-

benzenesulfonyl chloride 1a, 4-[Acetyl-(2-oxo-3-phenylsulfamoyl-2H-chromen-4-yl)-amino]-benzenesulfonyl chloride 2a , 2-{4-[Acetyl-(4-chlorosulfonyl-phenyl)-amino]-2-oxo-3-phenylsulfamoyl-2H-chromen-7-ylamino}-benzoic acid  3a.

All Structures have been synthesized and characterized using melting points , IR spectra , 1H-NMR, 13C-NMR spectra , and elemental analyses  . The purified synthesized compounds (1a,2a,3a), at contcentrations 2,3,5 mg/ml was tested for their  antibacterial activity against three bacterial cultures ;Staphylococcus aureus, Escherchia coli and Bacillus cereus. The antibacterial activity of synthesized compounds are compared with antibacterial activity of standard antibiotics cephalexine and streptomycine.  

The compounds (1a,2a,3a) shows  different bacteriostatic and bacteriocidal activity.
The Effect of Sodium Hydroxide Solutions with Different Ph on the Corrosion Of Iron Alloy (C1010) In Industrial Water
Authors: Kadhum Mouayed yousif , Bkhakh Chasib Khaiber , Albehadili Muayad Hasan
Published: May 2018

The effect of increasing pH value in the corrosion of iron alloy type (C1010) was studied in the presence of different pH solutions of sodium hydroxide dissolved in industrial water at 35ËšC  and it was found that the corrosion rate of iron alloy was less at pH of 9.5 . This result was proved by measuring some thermodynamic parameters such as corrosion current and covered surface area that pertain to corrosion using weight loss electrical (Tafel plot ) methods . Also the effect of temperature on the rate of corrosion at ( 25ËšC , 35ËšC and 45ËšC ) at different pH was studied and it was found that the rate of corrosion is increased with increasing the temperature at the same pH.
The Ongoing Study of the Chemistry of the Marine Inhabitants of The Ramsar Site of Port Royal, Jamaica
Authors: Gallimore Winklet Authrine
Published: May 2018

Research efforts to examine the chemistry of marine organisms collected from the Ramsar site of Port Royal, Jamaica, has led to the isolation of a range of compounds as diverse as the species from which they were derived. Six sponges, two algal species, one ascidian and one soft coral collected from the mangrove area and the shallow coastal reefs were studied to yield compounds including steroids, aromatic compounds and terpenoids.
AN ALTERNATIVE TREATMENT TO ELECTROPOLISHING: CHEMICAL POLISHING
Authors: Kaur Harleen , Kaur Prabhjot
Published: May 2018

Anodic alumina template containing hexagonally ordered nanopores has been widely used over the last decade for the development of numerous functional nanostructures such as nanoscale sensors, computing networks, optoelectronic devices, thin film micro circuits, ultra filtration membranes, keying layers for organic adhesives to hard, wear and corrosion resistant layers and memories. The long range pore order requires the starting aluminum surface to be extremely smooth. Electropolishing is the most commonly used method for surface planarization prior to anodization. While prevalent, this method has several limitations in terms of throughput, polishing area and requirement of special experimental setups. In this work, we report a new treatment called-chemical polishing which offers a viable, simpler, safer and faster alternative to electropolishing
Study on the Technology Conditions of Flue Gas Desulfurization with Organic Solvent
Authors: Chen Wanren , Li Hua , Chen Xiaoshuang
Published: May 2018

The technology experiment on Flue Gas Desulfurization (FDG) by DMSO method is studied in this paper, and the desulfurization efficiency is set out in various conditions. The results show that the desulfurization efficiency can be over 94% under the condition as follows: the rate of flow of DMSO=100 L/h, L/G＝40～50, absorbent concentration = 100 %DMSO, T=room temperature, the gas flow=60 ml∙min-1, inlet SO2 concentration= 0.1-0.5 %, the time of operation must be controlled in 30 minutes.
The Kirkwood Superposition Approximation, Revisited and reexamined
Authors: Naim Arieh Ben
Published: May 2018

The Kirkwood superposition approximation (KSA) was originally suggested to obtain a closure to an integral equation for the pair correlation function. It states that the potential of mean force of say, three particles may be approximated by sum of potential of mean forces of pairs of particles. Nowadays, this approximation is widely used, explicitly or implicitly, in many fields unrelated to the problem for which it was suggested.It is argued that the KSA is neither a good approximation nor a bad approximation; it is simply not an approximation at all.
Synthesis and Atiplatelet of 2-(ethyl amino acid esters), Amino pyridyl 1,3- oxzine
Authors: Alajelee Mohamad
Published: May 2018

2-(N-glycyl ,Alanyl , leucinyl , isoleacinyl , methionyl , phenyl alanyl,  vilinyl methyl ester) , 2-Amino and 4- Amino pyrideyl -1,3- Benzoxazine -4- one were synthesized from the reaction of the corresponding amino acids ester , Amino pyridines with methyl cyano salicylate using improved method. The resulted benzoxazine derivative were tested for their Antiplatelet inhibitory activity , their IR , NMR (1H , 13C) were also studied and checked by elemental analysis.
SYNTHESIS AND STUDY OF BIMETALLIC CATALYTIC SYSTEMS FORMED IN SITU BY ALUMINUM, 1, 2-DICHLOROETHANE AND Fe (III), Ni (II), Mn (II) CHLORIDES
Authors: Gasimova K.M. , Ibragimov H.J. , Ibragimova Z.M. , Kolchikova I.V. , Khalaf Mai M. , Alieva A.E.
Published: May 2018

Novel bimetallic catalytic systems based on the catalytic complex (CTC) are synthesized from the reaction of Al metal and 1, 2-dichloroethane in the mode of in situ and modified with the metal chlorides of Mn (II), Fe (III), and Ni (II) in paraffin medium. The structures of synthesized catalytic samples were confirmed by bulk and surface characterization with FTIR, X-ray diffraction (XRD), thermal analyses (TG/DTG/DTA), dynamic light scattering spectroscopy (DLS) for determination the particle size and X-ray fluorescence microscopy (XRFM).
Computing Fifth Geometric-Arithmetic Index for Circumcoronene series of benzenoid Hk
Authors: Farahani Mohammad Reza
Published: May 2018

Let G=(V; E) be a simple connected graph. The sets of vertices and edges of G are denoted by V=V(G) and E=E (G), respectively. The geometric-arithmetic index is a topological index was introduced by Vukicevic and Furtula in 2009 and defined as  in which degree of vertex u denoted by dG(u) (or du for short). In 2011, A. Graovac et al defined a new version of GA index as  where  The goal of this paper is to compute the fifth geometric-arithmetic index for "Circumcoronene series of benzenoid Hk (k≥1)".
Synthesis and Characterizations of Strontium Cerium Oxide Phosphor
Authors: Zambare Pradip , Girase K. D. , Mahajan O. H.
Published: May 2018

A new Strontium Cerium Oxide (Sr4Ce2O7) blue phosphor with, orthorhombic structure was synthesized via standard solid state reaction method using strontium oxide and cerium oxide as a raw materials.  The samples were characterized by Thermo analytical techniques (TG, DTA, and DTG), Fourier transformation infrared (FTIR) spectroscopy, Raman spectroscopy, and Photoluminescence studies at room temperature. In excitation spectra two excitation bands were located at 361 and 391 nm respectively.   The emission spectrum was a broad band peaking at 474 nm, which was suitable for the doping of rare earth ions.
Intercalated nanosized MO2 (M: Sn, Ce) layers between CNTs and Pt or PtSn nanoparticles catalysts
Authors: Mohamedi Mohamed , Tabet-Aoul Amel
Published: May 2018

Direct ethanol fuel cells (DEFCs) is receiving enormous attention as alternative electrical energy conversion systems. This paper gives an outline on some recent advances achieved in our laboratory regarding the development of high performing anode for ethanol oxidation. We developed multi-components binderless hierarchically organized layer onto layer nanostructured catalysts comprising a carbon paper (CP, current collector)/carbon nanotubes (CNTs, conductivity enhancer)/catalyst promoter (MOx, M: Sn; Ce)/Pt-based (electrocatalyst). The main focus was how to lower the onset oxidation potential (OOP) of ethanol at Pt75Sn25 catalyst. Towards that aim, metal oxides such as CeO2 and SnO2 were sought as catalyst promoters. It has been discovered that intercalating a nanostructured layer of SnO2 between CNTs and Pt75Sn25 considerably lowered the OOP of ethanol and also increased the specific mass activity (SMA) at low potentials. Indeed, the OOP at the CP/CNT/SnO2/Pt75Sn25 was 210 mV and 117 mV negative relative to that delivered by CP/CNT/Pt and CP/CNT/Pt75Sn25, respectively confirming by that the promoting effect of SnO2 of the oxidation of CO at low potentials. The SMA determined at slow potential scan rate of 5 mV/s at 0.4 V vs. Ag/AgCl revealed that CP/CNT/SnO2/Pt75Sn25 delivered an SMA of 1.2 times higher than that of the CP/CNT/Pt75Sn25 catalyst and 1.5 times greater than the one exhibited by the CP/CNT/CeO2/Pt75Sn25 catalyst.