Search results

Synthesis and characterization of Cu(Ⅱ), Zn(Ⅱ) dendritic metal complexes WANG Jun, ZHANG Peng, CHEN Shuai and LI Cuiqin (Department of Petrochemical Engineer, Northeast Petroleum University, Daqing 163318,China) Email: wangjun1965@yeah.net, zp183193@163.com, chsh4020@hotmail.com, licuiqin78@163.com Key words: dendritic metal complexes；schiff reaction；synthesis；characterization Abstract.
The multiple functionalization of dendrimer is due to its special structure which also endows it with new vitality, such as microsystems of medical and molecular diagnosis and carrier materials of drug and gene delivery system.
The researches of this ligand in the fields of organic carrier catalyst, pharmaceutical carrier, nanometer material [6,7] and optical materials [8,9] have proven to be of great interest in recent years.
Structure as follow: Structure of dendritic-salicylaldehydeimine ligand Structure of dendritic metal complexes(M=Cu, Zn) Experimental Materials The anhydrous methanol and alcohol are analytical reagents purchased from Shenyang Xinxing and Shenyang Donghua chemical plant respectively.
Conclusions (1) Using ethanol as solvent, a kind of dendritic-salicylaldehydeimine ligand was synthesized with 1.0G polyamidoamine and salicylaldehyde through schiff reaction (yield 86.7%), Then Cu(Ⅱ), Zn(Ⅱ) dendritic metal complexes were further formed using dendritic -salicylaldehydeimine ligand, copper acetate and zinc acetate as raw materials, methanol as solvent, and the yield was 88.2% and 65.2% respectively

Therefore, the external force is applied to steel wire ropes shall be a dynamic response, adjustable data, this is the key technology of sliding ropes brake.
Selection of sliding ropes brake structure, must considers how to through the mechanical external force applies to the sliding steel wire ropes, the material contacted to steel wire ropes is a certain wear resistance and friction coefficient, also can not has high hardness, namely during the process of steel wire ropes dynamic braked, the material contacted to steel wire ropes wears smaller is better, friction coefficient the bigger the better, the mechanical damage to steel wire ropes as small as possible.
Therefore, the sliding ropes brake selects a double action hydraulic cylinder structure, the material of brake pad is the homogeneous material as the friction pad, the assembly of brake pad is on the head of double action hydraulic cylinder, direct contacts the steel wire ropes.
Coal engineering 2008(5):99-100

G. studies (Autonomous), Lawspet, Pondicherry – 605008, India 2Department of Biomedical Engineering, Sathyabama University, Rajiv Gandhi Salai, Chennai – 600119 –INDIA Email. abiju_nandu@yahoo.com,b suresh.banswa@gmail.com, canimananda72@gmail.com Key words: Saw mill, Pearson’s correlation coefficient, Seasonal incidence ABSTRACT: - Prevalence of airborne fungal spores with their seasonal periodicity in the extra and intramural environments of a saw mill of Pondicherry region was carried out by gravitation method from January 2011 to December 2011.
INTRODUCTION In the saw mill and wood processing factories, workers handling organic materials are generally exposed to various aero-allergenic and toxic substances originating from wood and microorganisms present in wood dust [1, 2, 3].
MATERIALS AND METHODS Pondicherry is the capital city of Puducherry state situated in the coromandal coast of Bay of Bengal and ruled by the French before 16th August 1947.

Effects of Homogenization-Free on the Microstructures of an Al-Mg-Si-Cu Hot-Rolled Plate for Automotive Pannel Ni TIAN1,2,a*, Qilong LIU1,b, Ziyan ZHAO1,c, Gang ZHAO1,2,d, Kun LIU3,e 1School of Materials Science & Engineering, Northeastern University (NEU) Wenhua Road 3-11, Heping District, Northeastern University,Shenyang 110819 China 2Key Laboratory for Anisotropy and Texture of Materials, Northeastern University,Wenhua Road 3-11, Heping District, Northeastern University,Shenyang 110819 China 3Department of Applied Science, University of Quebec at Chicoutimi, Chicoutimi, G7H2W9, Canada atiann@atm.neu.edu.cn, b1911830744@qq.com, c746383463@qq.com, dzhaog@mail.neu.edu.cn, ek.liu1350@gmail.com Keywords: Al-Mg-Si-Cu aluminum alloy; automotive body sheet; homogenization-free treatment; hot rolling; microstructure Abstract.
Acknowledgements This work was financially supported by the National Key R&D Program of China (2016YFB0300801, 2016YFB1200506-12), the National Natural Science Foundation of China (51371045) China.

Photocatalytic Degradation of Indigo Carmine by ZnO–Cu2O/Graphene Oxide Composites Synthesized via Hydrothermal Method Huaidi Wu1,a, Lusheng Chen1,b*, Jinchao Hu1,c 1College of Chemistry, Chemical Engineering and Materials Science, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P.R.
Another option to solve faster recombination kinetics problem is to design and develop composite materials such as ZnO/CeO2 nanofibers[10], ZnO/montmorillonite[11], Cu2O nanoparticles sensitized ZnO nanorod arrays[12], SnO2/ZnO/TiO2 composite semiconducto[13], ZnO–reduced graphene oxide (GO) composites[14].

Introduction Cylinder liner surfaces hold the key to the performance of an internal combustion engine.
The Hall-Petch relation tells that with the grain size getting smaller, the hardness of the materials increases.
Kumar, Effect of liner surface properties on wear and friction in a non-firing engine simulator, Materials and Design. 28(5) (2007) 1632–40, doi:10.1016/j.matdes.2006.01.034
Matthews, et al., Plasma electrolysis for surface engineering, Surface & Coatings Technology. 122(2-3) (1999) 73-93, doi:10.1016/S0257-8972(99)00441-7

Materials and Methods 2.1.
Materials 2.1.1.
Acknowledgement Authors gratefully acknowledged state key laboratory of chemical engineering and technology, Tianjin University, Tianjin, P.R.

Introduction Dimethyl ether (DME) is an important chemical raw material for many chemical compounds, such as dimethyl sulfate, methyl acetate and light olefins.
The study of carbonaceous residues on the surface of ZSM-5 zeolite in the synthesis of DME is an urgent task, and its solution is the key for choosing the optimal dehydration catalyst.
Materials and methods It is well known that zeolite catalysts have one disadvantage connected with low resistance to coking, i.e. even small amounts of carbon greatly reduces the catalytic activity of zeolites.
The method of temperature-programmed oxidation (TPO) was used to study the possibility of coke oxidation on the material surface in the temperature range of 25-900 °C.
Abu–Dahrieh, Scaling down direct dimethyl ether synthesis for biogas conversion, School of Chemistry and Chemical Engineering, Queen’s University Belfast, Belfast, 2010

Geochemistry and Source Apportionment of Atmospheric Particulate Matter in Jiaozuo City Dangyu Song1, 2, a, Cunbei Yang2, b 1 Henan Provincial Key Laboratory of Organism Traces and Mineralizing Procedure, Henan Polytechnic University, Jiaozuo, China 2 Institute of Resource and Environment, Henan Polytechnic University, Jiaozuo, China a dangyusong@hpu.edu.cn, b yangcunbei@163.com Keywords: atmospheric particulate matter; element composition; mineral composition; source apportionment Abstract.
There are many coal-fired power plants, construction material production factories (such as cement, ceramic, fire clay, and brick factories), chemical and metallurgic industry in this area.
A set of standard materials were used for quantitative analysis, such as Al2O3 (99.9%), SiO2 (99.9%), CaCO3 (99.9%), ZnCl2 (99.9%), MgO (99.9%), MnO2 (99.0%), KCl (99.9%), Fe2O3 (accounted in the form of Fe，69.8% ~70.1%), TiO2 (99.9%), Pb(CH3COO)2·3H2O (99.9%), CuSO4·5H2O (99.9%), and Na3PO4·12H2O (99.0%).
It may come from transport of ground dust, or from industrial smoke dust, but from the view that mineral composition of each industrial raw material (e.g. raw coal), the content of quartz is very small in normal conditions.
Characterization of metal species in TSP and PM10 aerosols in Jiaozuo, China. 2nd International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2008, 3782-3784

Synchrotron Radiation Photoelectron Spectroscopy Study of Thermally Grown Oxides on 4H-SiC(0001) Si-face and (000-1) C-face Substrates Heiji Watanabe1,a,*, Takuji Hosoi1, Takashi Kirino1, Yusuke Uenishi1, Atthawut Chanthaphan1, Akitaka Yoshigoe2, Yuden Teraoka2, Shuhei Mitani3, Yuki Nakano3, Takashi Nakamura3, and Takayoshi Shimura1 1 Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan 2 Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan 3 New Material Devices R&D Center, ROHM Co., Ltd., 21 Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan a watanabe@mls.eng.osaka-u.ac.jp, *corresponding author Keywords: synchrotron radiation, photoelectron spectroscopy, thermal oxidation, MOS devices, interface structure, interface state density, fixed oxide charge Abstract.
Among the various types of power devices, SiC-based metal-oxide-semiconductor field-effect transistors (MOSFETs), which provide a normally-off characteristic, should become a key component for next generation green electronics.
Taking into account the trade-off relationship between energy bandgap and permittivity of dielectric materials, Al-based oxides seem to be suitable for SiC-MOS devices due to its wide bandgap and excellent thermal stability.