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After Cr (VI) ions solution with 5 kinds of concentrations reacts with sensitive material in the same place, it is rapid to collect the spectrum signal from the spectrometer.
Fig.1 Structure of measurement Experiment Firstly, the standard Cr (VI) solution with the concentration 1000ug/ml made in National Center of Analysis and Testing for Nonferrous Metals and Electronic Materials(NCATN) is used to prepare the measurement solution.
Acknowledgements This work was financially supported by Natural Science Foundation Project of CQ CSTC ( 2010BB2251), Science Technology Project of Chongqing Education Committee ( KJ080719), Natural Science Foundation Project of CQ CSTC(2012jjA40037).
Determination of trivalent chromium and hexavalent chromium in dried edible fungi by microwave ashing-liquid chromatography with inductively coupled plasma mass spectrometry, Chinese Journal of Chromatography(in Chinese). 322(2014) 174-178
[6] GenMing, Zhu Qing-ren,Sun Deng-ming.Dual-wavelength dual-indicator catalytic spectro- photometric determ ination of trace chromium, Chinese Journal of Health Laboratory Technology(in Chinese). 191(2009)7-8

The material of the motor shell is ABS, elasticity modulus is 3.0E9Pa, poisson’s ration is 0.25 and the density is 2500kg/m^3.
Acknowledgements This study is support by the natural science foundation of Shandong Province (Project No.
ZR2012EEQ012), Qingdao science and technology development projects (Project No. 13-1-4-248-jch) and Youth Foundation of Shandong Academy of Sciences (Project No. 2013QN026).
Journal of Computational Acoustics, 2007, 15: 23-47
Jsme International Journal Series C-Mechanical Systems Machine Elements and Manufacturing, 2006, 49: 488-493.

Energy Efficient Building Materials with Vermiculite Filler A.
They belong to the ecological fireproof materials and provide the good heat insulation.
One of the extension ways of the heat insulation materials production as well as the light aggregates for them is the usage of vermiculite and vermiculite based materials because this material is a local raw one.
Rodrigues, “Characterization of Natural Clay Vermiculite, Expanded by Indirect Method for Energy and Microwave“, Materials Science Forum, 820, 36-39 (2015)
Advanced Materials Research, 178, 53-58 (2011)

Material and methods Materials Corn starch was supplied by Langfang Starch Co., Ltd.
Journal of Colloid and Interface Science, 315(2), 407-414
Journal of the Science of Food and Agriculture, 84, 1553−1561
Trends in Food Science& Technology, 9, 389–394
Journal of Cereal Sciences, 41(3), 239–249

Materials and Methods Feedstock Specification.
Narasimhan, "Powder Characterization," in Encyclopedia of Materials: Science and Technology, K.
Uhlenwinkel, "Effect of hot gas atomization on spray forming of steel tubes using a close-coupled atomizer (CCA)," Journal of Materials Processing Technology, vol. 282, p. 116677, 2020
Dehoff, "Feedstock powder processing research needs for additive manufacturing development," Current Opinion in Solid State and Materials Science, vol. 22, no. 1, pp. 8-15, 2018/02/01, doi: 10.1016/j.cossms.2018.01.002
Glatzel, "Stainless steel powder produced by a novel arc spray process," Journal of Materials Research and Technology, vol. 9, no. 4, pp. 8314-8322, 2020/07/01, doi: https://doi.org/10.1016/j.jmrt.2020.05.076

Introduction Nanotechnology is a multidisciplinary field in which materials can be synthesized, engineering and applied in many interesting applications.
Generally, there are two methodologies to obtain materials in nanoscale: a- The bottom-up technique, by which the created molecules from particles decreasing are collected to produce nanostructures.
Laser ablation gives a straightforward and contaminant-free technique that can be utilized for an enormous number of materials [12].
Journal.
Abdurrahman, “Structural Characterization of Nanoparticles Prepared by laser Ablation of Gold target in water”, Journal of Babylon University/ Pure and Applied Sciences/ No. (7)/ Vol. (21): 2013

The active nano SiO2 was prepared by the same method using the concentrated HCl and Na2SiO3·9H2O as the raw materials.
Development and Application of Materials (in Chinese), 2007, 22(4): 30–33
Journal of Mineralogy and Petrology (in Chinese), 2005, 25(1): 25–29
Journal of Mineralogy and Petrology (in Chinese), 2007, 27(1): 40–45
Metallic Functional Materials (in Chinese), 2005, 12(1): 13–15.

This problem includes along with search of new materials for fuel elements and the decision of problem of transportation and hydrogen storage also creation of various type of hydrogen and hydrogen-containing gas sensors for safety and preservation of the environment.
Materials and Methods New approach, which allows strongly increasing sensitivity of adsorption sensors to hydrogen and hydrogen-containing gases at room temperature by utilization of optical activation is presented.
Heterostructures, based on III-V materials with Pd contact were created in Ioffe Institute, Russian Academy of Sciences in St.Petersburg.
Based on these data we selected for more detailed investigations the following materials: n-InP, p-InP, n-GaSb and p-InAs.
Stoyanov, Photoelectric method of hydrogen detection, Journal of Mining Institute 87 (2010) 132-136

Citation & Copyright (to be inserted by the publisher ) Synthesis and crystal structure of hexagonal DyMnO3 Naoki Kamegashira̐, Hirohisa Satoh and Satoshi Ashizuka Department of Materials Science, Toyohashi University of Technology, Tempaku-cho, Toyohashi, 441-8580 Japan Keywords: DyMnO3, solution method, crystal structure, hexagonal, ferroelectricity Abstracts.
Experimental In the solution method the starting materials, Dy2O3 and metallic Mn, were dissolved into nitric acid with a stoichiometric ratio.
Journal Title and Volume Number (to be inserted by the publisher) 3 40 60 80 100 120 2� / deg.
The authors thank Professor Mitsuru Itoh, Materials and Structural Laboratory, Tokyo Institute of Technology for his helpful discussion and measurement of ferroelectric properties.
Thanks are due to the Research Center for Molecular Materials, the Institute for Molecular Sciences, for assistance in obtaining the low-temperature magnetic data.

Effects of BaO on properties of low fluoride content mould flux for high speed continuous casting Yanqing Lu1,2,a, Xing Fang3,b and Guodong Zhang1,c 1School of Materials and Metallurgy, University of Science and Technology Liaoning, China 2School of Materials and Metallurgy, Northeastern University, China 3Anshan Iron and Steel Group Corporation, China aluyanqing77@163.com, basfangxing@163.com, caszhangguodong@sina.com Keywords: BaO, low fluoride content, mould flux, high speed continuous casting Abstract.
Materials and methods The melting temperature and melting speed measuring instrumentation was used to test melting temperature.
According to mould flux used in high speed CC practice, the industrial and waste materials, such as synthetic calcium silicate, wollastonite, sintering diatomite, cement and insulation brick powder were used in experiment.
Zhu: Journal of Iron and Steel Research, 12 (2000), p. 46 [2] Y.
He: Journal of University of Science and Technology Beijing, 11 (2006), p. 1019