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Online since: May 2004
Authors: Maria V. Nikolić, Nebojsa Labus
In real systems it is controlled by bond strength and structure.
Acknowledgement This research was performed within the project No. 1832 entitled “Synthesis of functional materials from the ‘synthesis-structure-properties-application’ relationship”, financed by the Ministry for Science, Technology and Development of the Republic of Serbia.
Soc., 55 (1972) 144-145 [2] Tsang-Tse Fang, Jyh-Tzong Shiue, Fuh-Shan Shiau, On the Evaluation of the Activation Energy of Sintering, Materials Chemistry and Physics, in press [3] J.
Online since: September 2012
Authors: Guang Yu Tan, Yu Hua Zhang, Shu Cai Yang
At present, the forge welding structure is widely used in domestic hydrogenation reactors.
When the plastic deformation occurs at high temperature, the relationship of the flow stress , strain rate and temperature T can be formulated by the piecewise function put forward by Sellars and Tegart[11], namely Eq.1, Eq.2 and Eq.3. (<0.8) (1) (>1.2) (2) (All stress levels) (3) Where A1, A2, A, α, β, n1, n are all material constants without the temperature dependence; A is the structure factor, s-1; n1, n is stress exponent; α, β are stress level parameters; α=β/n1; R is a gas constant, R=8.3145J/(mol·K); Q is a constant of deformation activation energy, J/mol, it is generally independent to the temperature and the stress.
Materials Chemistry and Physics. 2008, 109(2-3): 212-216
Online since: February 2015
Authors: Qian Cheng, Jing Chen, Shun Quan Chen
Results and Discussion Structure characterization of fluorinated polyacrylate: The structure of fluorinated polyacrylate was characterized by FT-IR.
Industrial and Engineering Chemistry Research, 2008, 47: 502~511
Online since: March 2016
Authors: Nurliana Roslan, Hendrik O. Lintang, Salasiah Endud, Zainab Ramli
Lintang2 1Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia 2Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia *salasiah@kimia.fs.utm.my, ilrun_liana@yahoo.com.my, zainab@kimia.fs.utm.my, hendrik@ibnusina.utm.my Keywords: Biomimetic Models, Metalloporphyrin, Oxidation, 2,3,5-trimethylbenzoquinone, 2,3,6-trimethylphenol.
Table 1 UV-Vis data of H2TPP, H2TSPP and CuTSPP Compouds λmax (nm) Soret band Q bands H2TPP H2TSPP CuTSPP 418 415 412 515 516 551 552 539 591 581 647 636 3.1.3 Proton Nuclear Magnetic Resonance (1H NMR) Spectroscopy The structure of free base porphyrins, H2TPP and H2TSPP were analyzed by using 1H NMR spectroscopy which exhibited characteristic proton resonances: (a) β-pyrrole protons, (b) imino protons, and (c) meso-aryl protons.
Structures of the porphyrins and their functional groups were characterized using FTIR spectroscopy.
Online since: May 2023
Authors: S.E. Efimov, A.R. Aleksandrov
The layers of zeolite rock have a simple structure and lie in accordance with the sedimentary rocks of the Upper Devonian and lower Carboniferous that contain them.
Experimental Studies To determine the quality of filter materials, special importance is attached to their density, intergranular porosity, the structure of the grain surface and the selection of the optimal granulometric composition.
Gerasimova, Natural zeolites as sorbents of petroleum products, Chemistry in the interests of sustainable development. 3(11) (2003) 482
Online since: June 2007
Authors: Yoon Chang Park, Ha Kyun Jung, Dae Won Lee
Box 107, Yuseong, Daejeon 305-600, Korea 2 Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea a Corresponding author: hakyun@krict.re.kr Keywords: Luminescence, Blue emission, Phosphor, Precipitation, Spherical Abstract.
In addition, the spherical particles obtained in this work have a dense structure without the hollowness of spherical phosphors prepared by spray pyrolysis [6].
Consequently, the decrease in brightness and long-term stability originated from hollow structure could be overcome.
Online since: June 2014
Authors: Xing Li, Juan Yang
D.Shechtman was awarded the Nobel Prize of Chemistry 2011 due to the discovery of QCs in 1984, which has aroused the great interest on the structure and material again[3].
Wang, Piezoelectric material and fracture mechanics of its structure, National defence industry press, Beijing, 2002.
Online since: December 2014
Authors: Mona F. Ali, Rushdya Rabee, Abdel Gawaad Ali Fahmy, Sawsan Fakhry Halim
In severe environmental conditions, inter-cellular movement of PEG within and between the cellular structures of an artifact can cause additional structural damage [6].
In general, polymer used to reinforce artifacts, whether natural or synthetic polymer should play its role in restoration without affecting the structure or the antique appearance.
Thus, we can conclude that the SBR did not alter or interact with the chemistry of the leather sample since no new peaks appears for treated samples that indicate the formation of new bonds.
Online since: May 2016
Authors: Zhen Wu Liu, Zhi Wu Shang, Zhu Chang, Wang Tai Yong
Stepping motor controller Syringe Disposable suction head head head Fig. 1 Diagram of organization structure schematic diagram At present, some biochemical analyzer at home and abroad mainly use piston type suction enzyme mechanism composed of a piston cylinder and the movement of the plunger [3].
The drive system can use gear transmission, a belt wheel transmission system and screw drive system, and some of the special structure the transmission system, such as soft rack gear transmission system.
[4] Tudos AJ , Besselink GJ ,Schasfoort RB.Trends in miniaturized total analysis systems for point of care testing in clinical chemistry.
Online since: August 2013
Authors: Wei Li, Chen Fang, Ying Wei Ai, Dong Yu, Chuan Ren Li, Zhi Jin Fan, Yu Hong Xiao
Difference between Organic Materials of Distinct Slope Soils in Hilly Area of Sichuan Province, China Li Wei1,a, Fang Chen2,b, Ai Yingwei2*,c, Yu Dong2,d, Li Chuanren2,e, Fan Zhijin3,f and Xiao Yuhong2,g 1Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China 2Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu 610064, China 3State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China aliwei@imde.ac.cn, b593548751@qq.com, caiyw99@sohu.com(*Corresponding author), dydn112@163.com, e573179898@qq.com, ffanzj@nankai.edu.cn, g807287296@qq.com Keywords: slope; artificial soil; natural soil; organic material Abstract: Organic materials in soils mainly consist of alkanes, esters, aromatic compounds and plant secondary metabolites, but they are different
Comparison with the standard atlas, identification of the structure of matters and names, and the use of an area normalization to correspond the peak area with its substance content.
Soil structure of the synthetic soil profile formed during construction of the railway.