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Online since: December 2013
Authors: Abdus Samad Mahmud, Nazihah Nawawi
Analytical and Bioanalytical Chemistry, 2005. 381(3): p. 557-567
[13]Vojtech, D., et al., Surface structure and corrosion resistance of short-time heat-treated NiTi shape memory alloy.
Leitner, Influence of a controlled oxidation at moderate temperatures on the surface chemistry of nitinol wire.
Online since: February 2018
Authors: Jian Ying Yu, Lian Li, Bian Yang He, Min Wu
X-ray diffraction (XRD) that test the crystal structure of LDHs were recorded using a D8Advance diffractometer (Bruker Corporation, Germany) with Cu-Ka radiation (k=0.15406nm) under the conditions: Cu Kα radiation (λ=0.15418 nm) at 40 kV and 30 mA, with a scanning rate of 5°/min, in the 2θ range from 3° to 65°.
Three kinds of LDHs are well crystallized and structured and have standard characteristic peaks (003), (006), and (009) of LDHs.
It indicates that the structure and composition of three different sizes of LDHs are similar.
Effect of ageing on bitumen chemistry and rheology [J].
Chemistry of Materials, 14(10) (2006) 4286-4291
Online since: August 2019
Authors: Dzhul’etta A. Beeva, Aues A. Beev, S.Yu. Khashirova, V.Z. Aloev, M.U. Shokumova
In the present paper, some features of the synthesis of copoly(arylene ether ether ketone) by nucleophilic substitution reaction are considered, the dependencies of the reduced viscosity of copolyesters on the chemical structure of diols and the conditions of the copolycondensation processes are clarified.
By varying the chemical structure of dioxysilane compounds and activated aromatics, it is possible to synthesize SPAEC with a wide range of predetermined useful performance indicators [7].
Factors such as the chemical structure of the functional groups involved in the reaction, the chemical nature of the nucleophilic and electrophilic reagents, the nature of the solvent used, the molar ratio of the reacting components and their concentration, possible side reactions, the chemical nature of the catalysts, temperature and others.
As disadvantages of the considered method of obtaining PAEK and SPAEEK, it is possible to note the insufficiently good solubility of polyesters, first of all, of crystalline structure, in the most affordable cheap solvents, the difficulty of washing the by-products of the reaction - alkali and alkaline-earth metal halides from polymers.
Aromatic Copolyether Ether Ketones Derived From Hydroquinone, Fibre Chemistry. 49-6 (2017) 411. https://doi.org/10.1007/s10692-018-9910-6 [7] V.V.
Online since: July 2012
Authors: Hong Yan Lin
L-(-)-dibenzoyltartaric acid was used to resolve DL-ephedrine to get optically pure isomers D-(-)-ephedrine and L-(+)-ephedrine.Chemical structure was confirmed by IR and optical purify was up to grade.
This paper synthetizes DL-Ephedrine according to the references [1], and resolute it, finally obtain the product with determined structure and qualified rotation.
As showed in figure, it has the following characteristic peaks(cm-1): 3331,2976,2840,2759,2468,1590,1491,1455,1332,1049,992,752,which are consistent with characteristic peaks of L-(+)-ephedrine hydrochloride according to the report of references[3], visibly the structure is accurate, and the resolution is fine.
Chemical structure was confirmed by IR and optical purify was up to grade.
Chinese Journal of Medicinal Chemistry, 2008,18(3):195~199.
Online since: January 2012
Authors: Shao Zao Tan, Shi Qing Man, Yu Shan Xie
Preparation and characterization of antibacterial cap-shaped gold nanoparticles Yushan Xie1, Shiqing Man2, a, Shaozao Tan1, b 1Department of Chemistry, Jinan University, Guangzhou Guangdong, 510632, China 2Department of Electronic Engineering, J, Jinan University, Guangzhou Guangdong, 510632, China atsqman@jnu.edu.cn, bshaozao@tom.com Keywords: Gold nanocaps; Vacuum depositing; SiO2 nanoparticles; Characterization; Antibacterial activity.
It was found that gold films with cubic structure have completely covered self-assembled monolayers of SiO2 nanoparticles.
The structure and antibacterial activity of these gold nanocaps were also investigated.
Characterization of the crystal structure X-ray diffraction pattern of gold nanocap was measured to examine the crystal structure of gold nanoparticles as shown in Fig. 2.
The (111), (200), (220), and (311) planes represent a cubic structure of the metallic gold.
Online since: May 2012
Authors: Yan Qun Huang, Xue Mei Zong, Jing Wang, Li Ping Zhang, Hong Guang Ma
To respond to new requirements, it can be edited in size, modified in structure, or reconfigured in module.
The analyzing results show that this structure is enough in strength and rigidity, but on the other side, it probably wastes materials.
In view of lowering the product cost, the topology of the structure should be rearranged and optimized.
Repeat the modifying-and-computing process and the final structure can be optimally determined.
Ierapepritou: Industrial & Engineering Chemistry Research Vol. 48(18) (2009),p. 8566
Online since: August 2016
Authors: Hai Feng Chen, Jia Mei Chen, Zhi Xue Pan
Preparation and Photocatalytic Activity of Cu/BiVO4 by Solid State Grinding Method for Degradation of Methyl Orange Haifeng Chen, Jiamei Chen, Zhixue Pan Department of Materials & Chemistry, Huzhou Teachers College, P.
The structure and properties of the samples were characterized by Infrared Spectroscopy(FT-IR), X-ray diffraction (XRD) and UV-vis diffused reflectance spectroscopy (DRS); Using the degradation of methyl orange(MO) as the probe, it was simulated as the degradation of sewage under the visible light to study the influence of the illumination time and the amount of photocatalysts.
Different synthetic routes have a similar structure and performance in vital importance.
The monoclinic phase structure can be prepared through careful control of synthetic parameters such as the grinding time and the drying time.
[3] Wang Y, Deng K, Zhang L, Visible light Photocatalysis of BiOI and its photocatalytic activity enhancement by in situ ionic liquid modification, Journal of Physical Chemistry C, 115(2011) 14300-14308 [4] Yong Cai Z, Jing L, Ming Z, Dionysiou, D.
Online since: December 2023
Authors: Shaik Zainnudin, Richard I. Harry, Shaik Jeelani
Also, a disruption of chain structure was observed in 3-10% of samples in comparison to neat films indicating a reduction in polar phase (β) (responsible for chainlike structure) of P(VDF-TrFE) in composite films.
This infers that the crystalline structure of the nanocomposite films can be controlled by particle loading.
Journal of Materials Chemistry C 1, no. 23 (2013): 3710. https://doi.org/10.1039/c3tc30216d
“Ferroelectric and Magnetic Studies on Unpoled Poly (Vinylidine Fluoride)/Fe3O4 Magnetoelectric Nanocomposite Structures.”
Materials Chemistry and Physics 137, no. 3 (January 2013): 781–87. https://doi.org/10.1016/j.matchemphys.2012.09.064
Online since: October 2014
Authors: M.J. Lázaro, C. Alegre, M.J. Nieto-Monge, D. Sebastián, M.E. Gálvez, E. Pastor, R. Moliner
Due to its graphitic structure CNF have high chemical resistance and high electrical and thermal conductivity.
Structure and electrochemical properties of carbon aerogels polymerized in the presence of Cu2+.
Surface chemistry, porous texture, and morphology of N-doped carbon xerogels.
Journal of Materials Chemistry, 20 (2010) 6746–6758
Journal of Materials Chemistry, 19 (2009) 7830–7838
Online since: May 2013
Authors: Kamariah Noor Ismail, Norhasyimi Rahmat
Pure amorphous material of SBA-15 has two-dimensional structure of p6mm hexagonal array, in which it is indexed at (100), (110) and (200) diffraction line of XRD [10].
Technically, an optimized functionalization of SBA-15 would preserve its hexagonal structure, which indicates perfect attachment of functional group in its pore walls.
Observations of mesoscopic structure with the effect of calcination temperature acquired by XRD are shown in Figs. 1 to 3.
As shown by Fig. 4, the samples of pure SBA-15 are still retained in long-order of mesoscopic structure even if calcined at longer hours up to 8 hr.
Morales: Journal of Materials Chemistry 12 (2002), p. 1664