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Online since: January 2004
Authors: Thomas W. Hansen, Claus J.H. Jacobsen, Iver Schmidt, Michael Brorson, Astrid Boisen, Søren Dahl
Citation & Copyright (to be inserted by the publisher) Non-crystallographic Nanopores in Single Crystals: A New Approach in Nanomaterials Chemistry Claus J.
Carbon nanotube templated metal sulfide nanotubes A number of pseudo-graphitic metal compounds that crystallize in layered structures (e.g. metal disulfides MS2 (M=Nb, Ta, Mo, W [7]), NiCl2, and InS) have within the last decade been prepared in nanotubular morphology.
Online since: February 2015
Authors: Elena Yunda, Alexander Gusev, Natalia Kosova, Anna Godymchuk, Denis V. Kuznetsov
The formation of particles with developed structure allows predicting possible mechanical damage of tissues and cells of living body by such structures.
Cheetham (Eds.), The chemistry of nanomaterials: synthesis, properties and applications, Wiley, Weinheim, 2005, 94-112
Sidorov, Mechanical Properties and Structure of Zinc-Containing Latex-Silicate Composites, J.
Crane, The ecotoxicology and chemistry of manufactured nanoparticles, Ecotoxicology. 17 (2008) 287-314
Fenin, Synthesis and properties of zinc nanoparticles: The role and prospects of radiation chemistry in the development of modern nanotechnology, Prot.
Online since: March 2011
Authors: Yang Qi, Babar Shahzad
A systematic study of solution aging time impact on surface morphology of sol-gel derived ZnO thin films Babar Shahzad1,a, Yang Qi2,b 1Institute of Materials Physics and Chemistry, School of Sciences, Northeastern University, Shenyang 110819, People’s Republic of China 2 Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, People’s Republic of China b Corresponding author.
X-ray diffraction spectra revealed the polycrystalline wurtzite structure preferentially oriented along the (002) polar plane with variable peak intensity.
The (100) and (101) diffraction peaks along with predominant (002) diffraction peak can observe almost in all samples suggesting that the films are polycrystalline with hexagonal structure having preferential orientation along c-axis perpendicular to the substrate plane.
Many previous studies reported the remarkable effect of solution pH in the enhancement of ZnO crystallite formation [26, 34], tailoring the size, morphology and optical properties of structure [20, 35, 36].
[28] A.Maldonado a, S.Tirado-Guerra b, M.delaL.Olvera, Journal of Physics and Chemistry of Solids 70 (2009), p. 571–575
Online since: May 2013
Authors: I.A. Leenson, J. Beckman, A.A. Krutikova, A.A. Ischenko
Entertaining Essays on Chemistry.
Chemistry Publ., Moscow. 1987
Budovskiĭ (Eds.), Organic chemistry of nucleic acids.
Shaath, The Chemistry of Sunscreens, in: N.J.
Boyd, Organic Chemistry, Allyn & Bacon, Boston, 1973
Online since: August 2014
Authors: Hui Yuan Ya, Yan Zhao Zhang, Yan Wei Cheng, Jian Ming Han, Chao Yun, Hong Bo Pang, Kai Gao
Secondary and thri-dimension structure prediction also revealed that it may have similar function with ANS in others plant species.
The predicted three-dimensional structure of ANS in tree peony and Arabidopsis.
A, Tree peony; B, Arabidopsis Secondary and three-dimen structure The secondary structure usually contain Alpha helix, Beta sheet extended strand, Beta turn and Random coil.
We predicted the secondary structure using SOPMA, results showed that Random coil and Alpha helix were the predominate structure, followed by Beta sheet extended strand and Beta turn.
The three-dimensional structure of PsANS was predicted with swiss-model, result was shown as in Figure 3, which was similar with structure of ANS in Arabidopsis.
Online since: February 2011
Authors: Jian Xu, Pei Xian Zhu, Hui Yu Ma, Sheng Gang Zhou
The author start from the design of the structure of base material, breaking the traditional electrode structural model which use the single metal(or alloy) as the electrode base material, and proposing layered structure of "sandwich" electrode base material, prepared composite materials by the aluminum or copper from the inner core to enhance the conductive properties of the substrate and outer layer of titanium coated so as to achieve technical ideas of further reduce the anode electrode potential.
Table 1 The test result of the Resistivity difference of laminated bimetal and pure Ti sheets marterial ΔΦ /V Resistivity/10-2μΩ·m Ti-Al 0.0394 14.5 Ti-Cu 0.0204 7.8 Pure Ti 0.1272 46.7 From the above tests and calculation results, it can been seen that the electrical conductivity of Ti-Al and Ti-Cu laminated composite electrodes are much better than that of pure titanium. take Ti-Al laminated composite electrode for example, Through two ways to analyse the reason of its better electrical conductivity, one is that the integral structure of Ti-Al laminated composite electrode is built with parallel Ti/TiAl/Al, then its total resistance should be less than or equal to that of aluminium; another is that Ti-Al laminated composite electrode is built with series form of Ti/TiAl /Al from the flow of electric current.
References [1] S.Ardizzone,C.L.Bianchi,G Cappelletti:Journal of Electroanalytical Chemistry,2006,5 89:1 60-166
(In Chinese) [14] L A Dasilva, V A Alves, S Trasatti, J F C Boodts:Journal of Electroanalytical Chemistry,1997,427(1/2):97-104
Online since: August 2011
Authors: Jie Ping Shi, Li Wei, Hong Wen Hu, Ting Chao He, Xiao Qiang Zhang, Chang Shun Wang, Guo Yuan Lu
Synthesis of Main-chain Polyimides Containing Azoaryl and Their Third-order NLO Properties Jie-Ping Shi1,a, Li Wei1,b, Hong-Wen Hu1,d, Ting-Chao He2,c, Xiao-Qiang Zhang2,c, Chang-Shun Wang2,c and Guo-Yuan Lu 1,d* 1Department of Chemistry, State Key Laboratory of Coordination Chemistry, Nanjing University, Hankou Road 22, Nanjing, 210093, P.
Fig. 1 Structures of main chain fluoro-containing polyimides Results and discussions Synthesis of main chain fluoro-containing polyimides.
The main-chain aryl azo fluoro-containing polyimides P1, P2, P3, P4 and P5 (Fig. 1) were synthesized by a condensation of dichloride compounds 1, 2, 3, 4 and 5 with 4,4’-(hexafluoroisopropylidene)diphthalic bis-imide 6 in an alkaline DMF solution (Scheme 1).The spectra data (1H NMR and IR) are in accord with the assigned structures.
This can be explained from their molecular structure.
Online since: October 2017
Authors: M.N. Azlan, Mohamed Kamari Halimah, A.A. Abdulbaset
The characterization of elastic properties of glasses by the ultrasonic non-destructive technique is very informative about the glass structure, and they are directly related to the interatomic potentials [5].The elastic properties described the mechanical behaviour of the materials and the study of these properties is of fundamental importance in interpreting and understanding the nature of the bonding in the solid state [5,6].
Density (ρ) and molar volume (Vm) of [(TeO2)0.70(ZnO)0.30](1-x) Nd2O3(x) glass system X ρ[kg/m3] ±10 Vm [cm3/mol] ±0.01 0 0.01 0.02 0.03 0.04 0.05 5346 5440 5520 5550 5566 5580 25.464 25.393 25.388 25.612 25.898 26.192 The obtained results indicate that neodymium oxide enters the glass network as a modifier by occupying the interstitial space in the network and generates non bridging oxygen (NBO) to the structure.
It is noted that the change in ultrasonic velocity is due to a substantial change in the glass structure.
Radiation Physics and Chemistry 110 (2015): 96-104
Journal of Physics and Chemistry of Solids 71.7 (2010): 965-970
Online since: June 2014
Authors: Ao Yun Xu, Shu Hui Zhao, Zhi Hui Wang, Hai Qin Rong, Hui Min Lin
The Effect of Polyvinyl Pyrrolidone and Nickel Acetylacetonate on the Fabrication of Polyacrylonitrile Precursor Fiber WANG Zhi-hui 1, a, RONG Hai-qin, XU Ao-yun1, b, LIN Hui-min and ZHAO Shu-hui1,c 1 College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China awangzhihui200803@163.com, baoyunxu@163.com, cshzhao@dhu.edu.cn Keywords: polyvinyl pyrrolidone; polyacrylonitrile; fiber precursor; nickel acetylacetonate Abstract.The effect of polyvinyl pyrrolidone (K30) and nickel acetylacetonate (Ni(acac)2) on the fabrication of polyacrylonitrile(PAN) fiber was investigated.
K30 and Ni(acac)2 was purchased from Aladdin Chemistry Co., Ltd.
PVA–based Activated Carbon Fibers with Lotus Root-like Axially Porous Structure[J].
Structure Evolution and Optimization in the Fabrication of PVA-based Activated Carbon Fibers[J].
The Structure and Rheology of Comples Fluids[M].
Online since: November 2013
Authors: Reza Bagheri, Seyed Mohammad A. Mousavi, Zahra Emam-Djomeh, Marjan Sherafati
There are two major structures for starch: amylopectin and amylose.
These structures have different properties.
The crystalline structures can be seen on dark background using polarized light in Fig. 4.
Whistler (Eds.), Starch: Chemistry and Technology, Elsevier, New York, 2009, pp. 193-226
Whistler (Eds.), Starch: Chemistry and Technology, Elsevier, New York, 2009, pp. 731-734