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Photochemical Degradation of Azo Dyes in the Presence of Hydrogen Peroxide and Hematite under Visible Light Irradiation: Surface Complex Forming and Reaction Mechanism Yu-Chao Tang1,2a *, Xian-Huai Huang1b, Han-Qing Yu2, Wei-hua Li1,2, Chang-nian Wu1 1Department of Environmental Engineering, Anhui University of Architecture, Hefei, 230022, P R China; 2School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, P R China *Corresponding author. atangyc@aiai.edu.cn, bxhhuang2@gmail.com Keywords: Hematite, hydrogen peroxide, photochemical catalysis, Direct Red 4BS, Methyl Orange Abstract: The photochemical degradation mechanisms of an azo dye Direct Red 4BS and Methyl Orange on hematite in the presence of H2O2 were investigated.
Experimental Materials and methods Iron oxide was purchased from Wuxi Zhanwang Chemical Reagent Compony, Jiangsu.
Effect of pH on sunlight (A) or UV irradiation (B) decolorization of Direct Red 4BS in the presence of a-Fe2O3 and H2O2 Acknowledgements This work was supported by the Natural Science Foundation of China (NSFC, No. 50908001, 51078001), Key Special Program on the S&T for the Pollution Control and Treatment of Water Bodies (No. 2008ZX07316, 2008ZX07103), Special Science and Technology Foundation of Anhui Province (No. 08010301106), International Corporation Project of Science and Technology of Anhui Province (No. 09080703035), and the Anhui Natural Science and Technology Foundation (Excellent Youth Foundation, No. 10040606Y29).

Faso, Synthesis of a new class of red pigments based on perovskite-type lattice AxB(2-x-y)CryO3 with 0.90Key Engineering Materials 264-268 (2004), 1545-1548
Feldmann, Polyol-mediated synthesis of nanoscale functional materials, Adv.

Devkar, Sunflower oil mediated biomimetic synthesis and cytotoxicity of monodisperse hexagonal silver nanoparticles, Materials Science and Engineering C, 44 (2014) 209-215
Thakore, In vitro toxicity study of plant latex capped silver nanoparticles in human lung carcinoma cells, Materials Science and Engineering: C. 31 (2011) 1723–1728
Chaudhuria, Black tea leaf extract derived Ag nanoparticle-PVA composite film: Structural and dielectric properties, Materials Science and Engineering B. 177 (2012) 1741–1747
Materials Science and Engineering C, 39 (2014) 203-212
Materials Science and Engineering: C, 44 (2014) 234–239

College of Computer and Information Engineering, Xinjiang Agricultural University, Urumqi 830052,china. 3.College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052,china aemail:lilin_xjau@163.com,bemail: 199560637@qq.com,cemail: 1050353332@qq.com Keywords: Pressure delivery pipeline, Local head loss, Local resistance coefficient, Experimental study Abstract.
[3] HE Yiying, ZHAO Yi,SUN Shuqing.Experimental study on local head loss coefficient of bend in pipeline[J].Journal of Hydraulic Engineering,2003，11( 11) : 54-58
[5]Zhang Xin,Ji Changzhi,Jiang Min.Influence of relative roughness and Reynolds number on local resistance coefficient of 90°-bend pipeline[J].Journal of hydroelectric engineering, 2013, 32(4): 88-93
Journal of Hydraulic Engineering,2004,2(2):17-20
Engineering and high-speed water discharge

Fatikow1,c 1Division of Microrobotics and Control Engineering, The University of Oldenburg, Germany axuan.ha.nguyen@uni-oldenburg.de, bchristoph.edeler@manitowoc.com>, cfatikow@uni-oldenburg.de, ∗corresponding author Keywords: piezoelectric actuator, stick-slip drive, guiding system, friction modeling.
However, although these models cover important characteristics of SSMDs, the influences of the guiding system on the performance of SSMDs are not systematically investigated yet.This paper gives an overview of the up-to-date research activities of SSMDs regarding to the modeling of SSMDs and summarizes important key aspects of the issue.
Typically, the contact elements are made of wear resistant material such as hardened steel or sapphire with the shape of sphere or half-sphere.
In precision mechanical engineering preloaded-guides (or free backlash guides) are used including ball bearings, air bearings, active magnet bearings as well as flexure structure.
Cimprich, Applications of piezo-actuated microrobots in micro-biology and material science, Int.

Optimization and comparison of three methods on anthocyanins extraction from Blackcurrant (Ribes nigrum L.) using RSM Yu Yang1, a, Shengxin Zhao2, b, Yaqin Xu3, c* and Zeyuan Yu4, d 1 College of science, Northeast Agricultural University, Harbin 150030, China 2 Experiment Center of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China 3 College of science, Northeast Agricultural University, Harbin 150030, China 4 Department of horticulture science, Northeast Agricultural University, Harbin 150030, China a yangyu@neau.edu.cn, b shengxin_zhao@163.com, c xuyaqin @neau.edu.cn ,d yzy@neau.edu.cn * corresponding author Keywords: Response surface methodology, Blackcurrant, Anthocyanins, Extraction, Optimization.
Materials and methods Sample preparation.
The key step in the study involved the determination of the optimum levels of the significant variables for anthocyanins production and the comparison of different extraction method.
Journal of Food Engineering, 2005, 71: 214–222

Some of the practical applications are flow through packed beds, underground disposable of radioactive waste materials, metal spinning, exothermic and endothermic reactions, etc.
The Magneto-hydro-dynamics (MHD) was applied in many areas of science, engineering and technology, such as MHD power generators, MHD flow meters, MHD pumps, polymer industry, spinning of filaments, etc.
These effects are significantly used in geosciences and chemical engineering.
These parameters have a key role to adjust and control the convergence of the solutions.

This model has mostly been used for describing the steady shear stress and shear rate behaviour of many food and biological materials like concentrated fruit juices, molten chocolates, soup, blood, honey, etc.
Jayaraman, Casson fluid flow in a pipe filled with homogeneous porous medium, International Journal of Engineering Science 34(10) (1996) 1145­1156.[13] H.
Sandeep, Nonlinear radiative magnetohydrodynamic Falkner­Skan flow of Casson fluid over a wedge, Alexandria Engineering Journal 55(3) (2016) 2045­2054
Khan, Unsteady MHD Falkner­Skan flow of Cas­ son nanofluid with generative/destructive chemical reaction, Chemical Engineering Science 172 (2017) 694-706
Turkyilmazoglu, Exact analytic solutions for heat and mass transfer of MHD slip flow in nanofluids, Chemical Engineering Science 84 (2012) 182­187

Oscillography Based Analysis of the Arc Stability in Manual Welding with Coated Electrode in Pulsed Current BURCĂ Mircea1,a * and LUCACIU Ioan2,b 1 Materials and Welding Engineering Department, Politehnica University Timisoara, 1 M.Viteazu Blvd., 300222, Timișoara, Romania 2 Industrial Ingineering Department, University of Oradea, 1 Universitații Street, 410087, Oradea,Romania amburca55@yahoo.com, bilucaciu@uoradea.ro Keywords: pulsed current, pulsed welding,coated electrod, arc stability, oscillography of welding parameters, frequency of pulse Abstract: Welding in pulsed current is specific to welding procedures carried out in MIG / MAG and WIG shielding gases environment, and which is appealling from both technological and process quality points of view because of the advantages this procedure provides, especially controlling the transfer mode and the power introduced into components.
During the high level pulsed current both the melting of the basic material and electrode material take place.
Experimental research Arc oscillography by recording key process parameters namely: the welding current and arc voltage respectively is a modern method of analyzing the stability of the arc and the metal drips transfer phenomena from the electrode tip through arc column.

Effects of Induction Heat Treatment on Austenitic Transformation, Microstructure and Mechanical Properties of Pipeline Steels XIAO Furen1, a, HAN Xiulin2, b, LIU Yanmei1, c, LU Guangping2, d, Liao Bo1, e 1College of Materials Science & Engineering, Yanshan University, Qinhuangdao 066004, China 2CNPC Bohai Equipment Manufacturing Co.
The chemical compositions of the materials above are shown in Table 1.
In the heat treatment of high frequency electric resistance, another key parameter is cooling rate.