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Online since: May 2011
Authors: Cun Jin Xu, Qun Lü, Hai Ke Feng
Luminescent and thermal properties of Eu3+ complex with salicylic acid and o-phenanthroline trapped in sol–gel glass Cunjin Xu1,a, Qun Lü1,b and Haike Feng1,c 1College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China axcj7215@yahoo.com.cn, bLuqun@263.net, cfhkfhk@163.com Keywords: Europium complex, Luminescence, Sol–gel, Thermal property.
Conclusions Silica gel containing Eu(sal)3(phen) shows fewer emission lines and lower ηEu value than the pure Eu(sal)3(phen), which is due to the highly ordered porous structure.
Online since: October 2010
Authors: Bora Derin, Sertac Yazici
Then, another following acid leaching on the second SHS product was carried out to eliminate MgO and Mg3B2O6 structures.
Schubert: Tungsten: properties, chemistry, technology of the element, alloys, and chemical compounds.
Online since: May 2011
Authors: Liang Hu, Ou Sheng Zhang, Chao Can Zhang, Li Li Wu, Wen Bing Sun
Study on Rheological Behaviors of Ultrafine CaCO3 Aqueous Suspensions Modified with Acrylate Macromolecular Modifiers Ousheng Zhang1,a, Chaocan Zhang1,b, Lili Wu1,c, Wenbing Sun2,d, Liang Hu1,e 1School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, People’s Republic of China 2College of Chemistry and Environmental Engineering, Hubei Normal University, Huangshi 435002, People’s Republic of China azhangousheng2007@163.com, bpolymers@whut.edu.cn, cwulili1999@yahoo.com.cn, dsun-wen-bing@163.com, egrant_hill@whut.edu.cn Keywords: Acrylate Macromolecular Modifier; Calcium Carbonate; Rheological Behavior Abstract.
In the case of modifiers containing more MMA units, due to higher hydrophilicity and more rigid molecular structure, modifier molecules tend to be absorbed on the surface of CaCO3 particles in an outspread status and thus make suspending particles more stable by means of electrostatic and steric effects.
Online since: July 2006
Authors: Eberhard Müller, Kirsten Moritz
Introduction Electrophoretic deposition is a well-known shaping, infiltration and coating technique which allows for example • the production of monolithic ceramics, of laminated or graded materials and of ceramic microstructures, • the infiltration of porous structures or fibre mats and • the deposition of coatings for a large variety of materials and applications [1 - 4].
The surface chemistry of the Al2O3 TM-DAR seems to differ from that of the powder CT 3000 SG.
Online since: November 2011
Authors: Cui Yu Geng, Xiao Yu, Zheng Chang, Xiao Dong Lei, Xiao Ming Sun, Liang Luo
Upon rehydration, the calcined products can easily be reconstructed to the original layered structure, viz., so-called “memory effect” [2] Therefore, calcined layered double hydroxides (CLDHs) are especially promising adsorbents and have widely been used to remove selenite, phosphate Cr2O72–, and other toxic anions from contaminated water.
Thiosulfate (S2O32–) co-exist with thiocyanate (NH4SCN) in many industry effluents such as coking, photofinishing, electroplating, dyeing, and mining [7-9], S2O32– in water will not only cause the rising of BOD and COD, but also will influence the chemistry of the water and potentially impact the resident biotic community, due to lowering aqueous pH resulting from sulfuric acid produced during the oxidation treatment of S2O32–.
Online since: November 2010
Authors: Su Qin Li, Yun Fei Xiong, Xue Zhang, Ayijamali Kudureti
Study on removal of NH4+-N by zero-valent iron (ZVI or Fe0) in advanced coking wastewater treatment Suqin LI1,2, a, Yunfei XIONG3,b, Xue ZHANG2,c, Ayijamali.kudureti2,d 1 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing ,100083, China 2 Key Laboratory of Ecology & Circulating Metallurgy, National Ministry of Education, Beijing, 100083, China 3 School of Chemistry Engineering, Nangjing University of Technologies, Nanjing, 210000, China a ecolp@sina.com, bxyf_tx@hotmail.com, c carol19860415@163.com, Ayjamal2010@126.com Keywords: Nano/micro-sized ZVI (Fe0), Removal of nitrogen, Adsorption and coagulation, Advanced treatment of coking wastewater Abstract: In this study, the feasibility of a new chemical agent named zero-valent iron (ZVI or Fe0) was used to investigate for removal of NH4+-N from coking wastewater.
The dispersion of nano/micro-sized Fe0 particle was improved with temperature rising. 3.2 XRD Diffraction of ZVI The crystalline structure of Fe0 samples was characterized by diffractometer(D/MAX-2500) and the results were shown in Fig.2.
Online since: October 2010
Authors: Amélia Giovana Fargnoli, Karina Matugi, Isabela Martinatti, Mônica Lopes Aguiar
Initially, the method consisted of a “pre-hardening” process in which vapor of an instant adhesive (LOCTITE 416) passed through the dust cake at very low velocity to avoid any alteration of the cake’s structure.
Coury: Industrial & Engineering Chemistry Research Vol. 35 (1996), p. 3673
Online since: May 2014
Authors: Vicente Garibay-Febles, S. Capula-Colindres, K. Aguir, F. Cervantes-Sodi, L.A. Villa-Vargas
Valentini et al. [18] fabricated a CNT thin film sensor based on defective and defect free nanotube structures.
Wong, Covalent surface chemistry of single walled carbon nanotubes, Adv.
Online since: June 2013
Authors: Jian Bin Zhang, Dong Mei Yu, Juan Juan Li, Jian Gang Jia
This shows that the research on how metals affect the taste is also a new expansion in addition to the structures and properties of metals in materials science.
References [1] Information on http://en.wikipedia.org/wiki/Colored_gold [2] Information on http://chemistry.about.com/od/jewelrychemistry/a/goldalloys.htm [3] Fuchsia Dunlop: Spoon fed: how cutlery affects your food, Food & Drink in Financial Times (2012) [4] Information on http://m.ftchinese.com/story/001044831 [5] Information on http://www.epa.ie/whatwedo/resource/rohs/ [6] Information on http://ec.europa.eu/environment/waste/packaging_index.htm [7] Information on http://ec.europa.eu/environment/waste/elv_index.htm
Online since: April 2013
Authors: R. Rezzoug, H. Djelouah, L. Louni
The theoretical model presented in this work is the resonant scattering theory (RST: Resonance Scattering Theory) is a result of quantum mechanics, it was introduced in acoustic by überall and al [1, -5], it allows solve the problem of the scattering of an acoustic wave by a target, the decomposition of the broadcast echo waveform in the geometry on the non-resonant background, which according to the physical nature of the scatter shall be considered as a rigid structure , soft or intermediate [6, 7] and an elastic wave resonances reissued on the target.
Also the resonance of the fluid cavity is mixed with contributions waves diffracted by the wall of the cavity. [9] Difficulty to separating these two phenomena led us to consider the formalism of MRST was already used in quantum chemistry and physics. [10] Haug and al. [11] were the first to apply the MRST acoustics, they revealed that the energy of the fluid column is divided into two channels, one channel and one longitudinal wave which is transversal superimposed on the bottom echo on the non-resonant soft roll.