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Online since: June 2015
Authors: A.S. Silva, A.C.F.M. Costa, Francisco Nilson Silva, E.M.J.A. Pallone, J. Dantas
According to Noda et al. [16], sulfated zirconia has most of the sulfated groups within the structure, with an ionic character, forming less acidic sites.
The stoichiometric composition of the precursors mixture was calculated according to the valence of the reactive elements based on the propellants and explosives chemistry, considering the reagent oxidizing/reducing ratio equivalent to unit, f = 1 [17].
Xiao: Journal of Physical Chemistry B Vol. 109 (2005), p. 2567
Online since: February 2024
Authors: Ika Fitriani J Palupi, Ainun Ma'wa
Corrosion control aims to regulate the rate of corrosion so that its development remains within a certain range or can extend the life limit of a structure [6].
Royal Society of Chemistry.
New Journal of Chemistry (2017) 1-39
Online since: February 2024
Authors: Victor Sunday Aigbodion, Paul Amaechi Ozor, Nita Inderlal Sukdeo
It is clear from the TEM picture that the spherical and circular structures were the predominant phases.
ACS Sustainable Chemistry & Engineering, 6(5), (2018). 6203–6210, doi:10.1021/acssuschemeng.7b04 [5] A.
Industrial & Engineering Chemistry Research, 40(25), 5861–5877.doi:10.1021/ie010284b [7] ASTM E18-79 (2005): Rockwell Hardness Tester, model 38506, using the "C" scale in accordance with the guidelines in the American Society of Testing and Materials' [8] ASTM Standards, 1990: ASTM G99-95 standards for tribometer test dry test [9] ISO 10289,(2007) Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates — Rating of test specimens and manufactured articles subjected to corrosion tests [10] V.N.
Online since: October 2015
Authors: Eva Rykalová, Radek Fabian, Zdeněk Peřina, Petr Jonšta
Due their accessibility and better technical parameters, the infrared thermography systems can be used in medicine, light and heavy industry, building structures [1], car industry or within the predictive maintenance of machines, apparatus and devices and other scientific and research applications [2].
Some of the operations performed in ladles include de-oxidation, alloy addition, inclusion removal, inclusion chemistry modification, vacuum degassing, de-sulphurisation and homogenization.
Tight control of ladle metallurgy is associated with producing high grades of steel in which the tolerances in chemistry and consistency are narrow.
Online since: October 2010
Authors: Salvatore Andini, Francesco Colangelo, Claudio Ferone, Fabio Montagnaro, Luciano Santoro, Raffaele Cioffi
The structure of crystalline geopolymers resembles that of zeolite A [1].
[3] J.G.S. van Jaarsveld and J.S.J. van Deventer: Industrial Engineering Chemistry Research Vol. 38 (1999) p. 3932
Puertas: Proceedings of the 9th International Congress on the Chemistry of Cement, New Delhi, India, Vol. 5 (1992), p. 505
Online since: August 2012
Authors: Kai Qi Shi, Shuang Xi Shao, Lan Jiang, Ya Li
Table 1 Main materials and instruments Main materials and instruments Supplier Iodine standard solution(0.0999mol/L) Guangdong Xilong Chemistry Co.
Ltd., China THPC sample (pH 3.48, purity of 70.51%) Zhejiang Zengxin Chemistry Co.
The free formaldehyde content of the collected solution was determined through the absorbency after treated like above. 31P NMR Analysis 31P NMR was employed to describe the different structure of phosphorus compounds of the samples at different pH.
Online since: January 2013
Authors: Xiang Xue Xu, Wan Chen Xu, Yue Ling Bai, Chuan Bin Cai, Jian Hui Fang
High Performance of YBCO Films Prepared by Fluorine-free MOD Method and a Direct Annealing Process Xiangxue Xua, Wanchen Xub, Yueling Bai*, c, Chuanbin Caid and Jianhui Fang*,e Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P.
A broad Raman peak at 560-580 cm-1 was found in both films indicating a cation disorder of the barium and yttrium atom in the YBCO structure.
Chen, Modern Crystal Chemistry, second ed., Higher Education Press, Beijing, 2004
Online since: June 2012
Authors: Guo You Gan, Jing Hong Du, Jian Hong Yi, Ji Kang Yan, Rui Jiao Jia
The doped donor’s solid solubility in TiO2 grains and micro- structures can be adjusted and controlled by changing sintering temperature.
At high temperature, Nb5+ donor may involve two defect chemistry reactions and thereby make TiO2 grains semi-conductive.
The two defect chemistry reactions are given in eqs. (2) and (3).
Online since: February 2014
Authors: Cheng Zheng, Yong Qiang Zhou, Yue Kai Chen, Li Ping Zhang
,Guangzhou ,China 2Chemistry and Chemistry Engineering School, University of Guangzhou ,Guangzhou, China aemail: zhangliping@tinci.com Keywords: Surfactant, Hexadecyl Methyl Dihydroxyethyl Ammonium Bromide, Non-solvent Synthesis method Abstract: 1-Bromohexadecane(BHD) and N-Methyl diethanol amine(MDEA) are applied as reactants, to synthesize the surfactant hexadecyl methyl dihydroxyethyl ammonium bromide (HMDAB).
Introduction Nowadays green chemistry is attracting much attention by people.
IR(KBr), 1HNMR(CD3SOCD3) and ESI+/ES analyze to identified the structure and the molecular weight of the product. 1.4 Propertie tests Surface tension: 0.1% aqueous solution of Hexadecyl dimethyl ethyl ammonium bromide, platinum loop method was applied.
Online since: January 2013
Authors: Ping Ning, Hong Bin Wang, Lin Zhuan Ma, Bin Li, Tian Cheng Liu
Catalytic decomposition of CCl2F2 over solid base Na2O/ZrO2 Tiancheng Liu1,2,a, Ping Ning3,b, Hongbin Wang1,2,c, Linzhuan Ma1,2,d, Bin Li1,2,e 1 The Engineering Laboratory of Polylactic Acid-Based Functional Materials of Yunnan, School of Chemistry and Biotechnology, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China 2 Key Laboratory of Ethnic in Chemistry Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan University of Nationalities, Kunming, Yunnan, 650500, China 3 School of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China a liutc7077@sina.com.cn, b ningping58@sina.com, c wanghb2152@tom.com, d malinzhuan@126.com, e libin198012@163.com Keywords: Dichlorodifluoromethane (CCl2F2), Catalytic decomposition, Solid base, Na2O/ZrO2.
However, at the same catalyst composition, the different calcinations’ temperatures influence the local structure and properties of catalysts dramatically.