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Online since: March 2017
Authors: Edidiong Okon, Habiba Shehu, Edward Gobina
Instrumentation The component with strongest adsorption on the surface of the resin catalysts was determined based on the structure analysis using FTIR.
The C=O and –C=O-C- were suggested to originate from the lactic acid structure while C-O and C-H bonds were suggested to have occurred from the ethanol group and water (O-H).
Chemistry and Chemical Engineering (ICCCE), 2010 International Conference on: IEEE; 2010. p. 1-5
Industrial & Engineering Chemistry Research. 2012; 51(44):14367-14375
Industrial & Engineering Chemistry Research. 2014; 53(6):2167-2174
Online since: September 2021
Authors: J.N. Zainab, Farah Jawad Kadhum, Kareem Ali Jasim, Auday H. Shaban
Dyes are ionic, aromatic organic compounds with structures including aryl rings which have delocalized electron systems.
Such complex aromatic molecular structures make dyes more stable and more difficult to bio degrade.
References [1] M.P.Stevens, “Polymer Chemistry”, New York, (1999)
[2] F.Flory,"Priniciples of Polymer Chemistry", New York, (1953)
[8] P.Y.Brwee; "Organic chemistry":2nd Ed; prentice Hall New Jeres (1998)
Online since: March 2012
Authors: Kai Chang Kao, Dong Na Zhang, Ming Hua Chen, Ming Wu Tu
Self-lubricating SiC/PTFE composite coating formation on surface of aluminium alloy Minghua CHEN1,a, Kaichang KAO 1,b, Mingwu TU2,c ,Dongna ZHANG1,d 1Applied Chemistry Department of Northwestern Polytechnical University, XI′an, Shanxi, 710072, China 2The First Aeronautical Institute of the Air Force , Xinyang, Henan,464000 , China acredit6@163.com, bkoukc@nwpu.edu.cn, ctumw@163.com, dzhangdn@163.com Keywords: Anodization; Self-lubricating; Ultrasonic impregnation; PTFE; n-SiC Abstract: Anodized composite films containing n-SiC and PTFE particles are prepared on 2024 Al alloy by anodization in phosphoric acid-base electrolyte and ultrasonic impregnation and subsequent heat treatment.
Anodization is the most common method to overcome these shortcomings, and have been studied extensively .The anodic oxide film formed by anodization is generally considered to have a porous structure and has the merits of better wear resistance and excellent corrosion resistance .
Depositing and/or synthesizing anti-friction materials and lubricant in situ within the porous structure of the anodized aluminum film by physical, chemical or galvano-chemistry means to get certain self-lubricating property is one of the focus in the aluminum surface research area during the past 10 years.
Materials Chemistry and Physics, 2003,82 (2) :370–374
Online since: March 2014
Authors: Kun Du, Ming Lei Lian, Zhi Fang Fan, Yu Li
Preparation of Terephthalic acid (TPA) and Dioctyl terephthalate (DOTP) by Anthracite's Alkali Oxygen Oxidation Kun Du, Minglei Lian, Zhifang Fan and Yu Li Department of Chemistry and Chemical Engineering, Liu Pan Shui Normal University, Liupanshui, 553004, P.
A number of characterization techniques are being successfully used to determine the structure of TPA and DOTP.
The results indicated that the structure of TPA and DOTP are consistent with the standard.
Zhao: Journal of Fuel Chemistry and Technology Vol. 36(2008), p. 139 [8] Q.M.
Guo: Journal of Fuel Chemistry and Technology Vol. 31(2003), p. 496
Online since: October 2010
Authors: Xiong Zhang, Xiao Dong Wu, Yue Ping Dai, Zhi Peng, Ming Zhao
China 201804 2Huntsman Chemistry R&D Center (Shanghai) Co., Ltd., 455 Wen Jing Rd.
The study also indicates some differences between water emulsifiable PU primer and two-component PU primer in waterproofing and breathable properties, which are related to the curing chemistry and film forming properties.
In general, deleterious chemical substances carried by water penetrate into concrete structure and deteriorate the hydrated cement paste and even the steel bars.
The difference is attributed to the curing chemistry, film forming properties and actual film thickness applied.
One-component water emulsifiable PU primers are more emphasis on the impregnation of coating into concrete structure and the formation of a breathable coating layer.
Online since: October 2010
Authors: Hong Sun, Chuang Liu, Xiao Jia Gao, Yu Lan Tang
Density functional is used to study electron structure in a system by quantum mechanics.
Table 1 input parameters of molecular simulation Potential function Lennard-Jones potential Algorithm of interaction force of two atoms Velocity-Verlet algorithm Algorithm of electron structure GGA-BP Electric property 0 Dielectric constant of water 78.5 Pressure [Mpa] 0.1 temperature Room temperature Potential energy barrier according to two-electron reaction mechanism.
Journal of Physical Chemistry C, Vol. 126(6) (2008), p. 1975
Journal of Physical Chemistry B, Vol. 111(23) (2007), p. 6357
Journal of Physical Chemistry B, Vol. 112(18) (2008), p. 5602
Online since: January 2014
Authors: Hui Zhu, Xuan Ye Jin, Yong Ju, Qiang Xiao, Ru Chun Yang
Synthesis of bicyclic furo[2,3-d]pyrimidine Deoxynucleosides Conjugated with N-Diisopropylphosphoryl Amino Acids Ruchun Yang1,a, Hui Zhu2,b, Xuanye Jin3,c, Qiang Xiao*1,d, and Yong Ju*3,e 1Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, P.
China 3Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, P.
Or else the furo[2,3-d]pyrimidines structure will be opened during the deprotection.
Their structures were confirmed by various spectroscopies.
Online since: July 2012
Authors: Yi Bo Chen, Wei Cai, Yong Qiao Liu, Meng Lian Gong
Ca3Sc2Si3O12:1%Ce3+, x%Ba2+ green phosphors for white light-emitting diodes Yibo Chen1,a, Wei Cai1,b , Yongqiao Liu2,c, Menglian Gong2,d 1 School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China; 2 State Key Laboratory of Optoelectronic Materials and Technologies, Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China; achenyibo@gzhu.edu.cn, bcaiwei@gzhu.edu.cn, cliuyongqiao@sysu2.edu.cn, dcesgml@sysu.edu.cn Keywords: LED; phosphor; Ca3Sc2Si3O12 Abstract.
The powders synthesized are in pure phase and the doping of Ba2+ do not change the crystal structure of CSSO.
Honma: X-Ray Absorption Fine Structure-XAFS13.
Online since: September 2008
Authors: Maurizio Fermeglia, Sabrina Pricl, Marek Maly, Paola Posocco, Giovanni Maria Pavan, Giulio Scocchi, Jan Willem Handgraaf, Anastasia Malek, Johannes G.E.M. Fraaije, Carlo V. Catapano, Andrea Danani
Hala Laboratory of Thermodynamics, Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, 6-Suchdol, Prague, 165 02, Czech Republic 7 Leiden Institute of Chemistry, Soft Matter Chemistry, Gorlaeus Laboratories, University of Leiden, Einsteinweg 55, 2333 CC Leiden, The Netherlands a Sabrina.Pricl@dicamp.units.it Keywords: Dendrimers, multiscale molecular modeling, nanovectors, siRNA therapeutics, selfassembly Abstract.
The compact structure of the charge neutralized polyplex core efficiently prevents the access of nucleases to the enclosed nucleic acid drugs.
Understanding the structure-property relationships of these carrier/cargo assemblies is a prerequisite step for their rational design.
The formation of the bilayer vesicles can be attributed to the amphiphilic structure of the dendrimers, i.e. hydrophilic dendritic branches and hydrophobic periphery.
[11] The Chemistry Unified Language Interface (Culgi), version 2.2.0, Culgi B.V., The Netherlands 2007
Online since: June 2011
Authors: Jiang Li Cao, Jun Liu, Si Xiang Zhao, Li Jie Qiao, Wei Ling Lv, Rong Lei, Tao Tang
Structures of these coatings were examined by X-ray diffraction and scanning electron microscopy.
Therefore, the m[][].mmmmmmmk mmmmmmmmmultilayered structure is considered to be a good approach to improve the mechanical properties of ceramic coatings.
Furthermore, the multilayered structure may induce significant increases in the hardness of coatings [11].
Structures of these coatings were examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM).
Columnar structures are always found, as shown in Fig.2.