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Online since: January 2016
Authors: Irina Hussainova, Der Liang Yung, Rainer Traksmaa, Miguel A. Rodríguez
This phenomenon can explain the lower fracture toughness results as the lack of a dual phase structure inhibiting TiC’s ability to act as a toughening carbide.
%TiC to maintain its dual carbide structure allowing TiC to act as toughening agent and deflect crack propagation around or underneath the TiC grains.
Materials Chemistry and Physics. 153: (2015) p. 301-306 [5] D.L.
%TiC to maintain its dual carbide structure allowing TiC to act as toughening agent and deflect crack propagation around or underneath the TiC grains.
Materials Chemistry and Physics. 153: (2015) p. 301-306 [5] D.L.
Online since: July 2013
Authors: Huan Dai, Ming Qiao Zhu, Wei Li, Zhang Fa Tong
Highly efficient Nano-catalysts Using Activated Carbon as a Support for One-step Oxidation of Cyclohexane to Adipic Acid
Huan Dai1,a, Mingqiao Zhu1,b, Wei Li1,c and Zhangfa Tong2,d
1Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
2Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
adaihuan8848@126.com , bzhumingqiao@zju.edu.cn , civy198912@sina.com, dzhftong@sina.com
Keywords: Cyclohexane , Oxidation , Nano-catalyst , Adipic acid
Abstract.
Suo et al. initiated the use of nano-structured gold catalysts such as Au/ZSM-5 and Au/MCM-41 for the oxidation of cyclohexane in 2004.
The good activity and stability of the catalyst are ascribed to both the effect of nano gold particles and the structure and the surface properties of activated carbon.
Suo et al. initiated the use of nano-structured gold catalysts such as Au/ZSM-5 and Au/MCM-41 for the oxidation of cyclohexane in 2004.
The good activity and stability of the catalyst are ascribed to both the effect of nano gold particles and the structure and the surface properties of activated carbon.
Online since: July 2015
Authors: Mohamad Nidzam Rahmat, Muhammad Redzwan Raffe, Norsalisma Ismail
Lea’s Chemistry of Cement and Concrete, 4th edition, Arnold Publishers, London
Materials and Structures/Mat4riaux et Constructions, pp 545-551.Proceedings of the Tenth International Conference for Enhanced Building Operations
Materials and Structures pp 1139–1150 [16] R.M.
Materials and Structures/Mat4riaux et Constructions, pp 545-551.Proceedings of the Tenth International Conference for Enhanced Building Operations
Materials and Structures pp 1139–1150 [16] R.M.
Online since: April 2015
Authors: Xin Zhou Wu, Zheng Chen, Teng Zhou, Shuang Shuang Shao, Mei Lan Xie, Zheng Cui
Secondly, the inorganic nanoparticles should have better compatibility with the polymer matrix to achieve homogeneous dispersion composite structure.
(The insert is photo of composite ink with 10 vol% BaTiO3 content after 3 months) The surface chemistry of cubic BaTiO3 nanoparticles with and without the silanization reaction is characterized by FT-IR spectra, as can be seen in Figure 1.
Jiang, Core-shell structured poly(methyl methacrylate)/BaTiO3 nanocomposites prepared by in situ atom transfer radical polymerization: a route to high dielectric constant materials with the inherent low loss of the base polymer, J.
(The insert is photo of composite ink with 10 vol% BaTiO3 content after 3 months) The surface chemistry of cubic BaTiO3 nanoparticles with and without the silanization reaction is characterized by FT-IR spectra, as can be seen in Figure 1.
Jiang, Core-shell structured poly(methyl methacrylate)/BaTiO3 nanocomposites prepared by in situ atom transfer radical polymerization: a route to high dielectric constant materials with the inherent low loss of the base polymer, J.
Online since: March 2014
Authors: Oleg B. Vitrik, Alexey Yu. Zhizhchenko, Anatoly G. Mirochnik, Elena V. Fedorenko, Y.N. Kulchin
Fedorenko2
1Institute for Automation and Control Processes FEB RAS, 5 Radio Street, Vladivostok 690041, Russia
2Institute of Chemistry FEB RAS, 159 Prospect 100-letiya Vladivostoka, Vladivostok 690022, Russia
3Far Eastern Federal University, 8 Sukhanova Street, Vladivostok 690041, Russia
*Corresponding author e-mail: g89leksig@mail.ru
Keywords: photosensitive medium, doped PMMA, beta-diketonatoboron difluorides, optical recording, waveguide, Bragg grating
Abstract.
The analysis of the data presented indicates that the optical recording can be carried out in the wavelength range 300-450 nm as well as for the case of the bulk samples [5], while the readout of the recorded structure can be performed in spectral window (640 ¸1100 nm) which is useful for polymer photonics [3].
Experimental results To investigate the optical properties of waveguide structures recorded in PMMA+AntBF2 films we used experimental setups depicted in Fig. 2(a).
The analysis of the data presented indicates that the optical recording can be carried out in the wavelength range 300-450 nm as well as for the case of the bulk samples [5], while the readout of the recorded structure can be performed in spectral window (640 ¸1100 nm) which is useful for polymer photonics [3].
Experimental results To investigate the optical properties of waveguide structures recorded in PMMA+AntBF2 films we used experimental setups depicted in Fig. 2(a).
Online since: April 2014
Authors: Gennady S. Patrin, Dmitry A. Velikanov, Victor G. Myagkov, Liudmila E. Bykova, A.A. Matsunin, Y.L. Mikhlin, I.A. Tambasov, G.N. Bondarenko, Victor S. Zhigalov
Velikanov1,3
1 Kirensky Institute of Physics, RAS SB, Krasnoyarsk, 660036 Russia
2 Institute of Chemistry and Chemical Technology, RAS SB, Krasnoyarsk, 660049 Russia
3 Siberian Federal University, Krasnoyarsk, 660041 Russia
ae-mail: miagkov@iph.krasn.ru
Keywords: solid-state reactions, spinodal decomposition, manganese germanides, diluted semiconductors
Abstract.
Ferromagnetism is observed experimentally in Ge0.99Mn0.01 nanowires due to the presence of oxygen in the formation of Mn-O structures [26].
The resulting connections Mn-O and Mn-C increase the saturation magnetization and Curie temperature, but do not change the structure type and lattice parameters of Mn5Ge3.
Ferromagnetism is observed experimentally in Ge0.99Mn0.01 nanowires due to the presence of oxygen in the formation of Mn-O structures [26].
The resulting connections Mn-O and Mn-C increase the saturation magnetization and Curie temperature, but do not change the structure type and lattice parameters of Mn5Ge3.
Online since: May 2018
Authors: Ming Yu Zhang, K.S. Hui, Li Zhu Liu
Journal of Materials Chemistry, 2006, 16(3): 310-316
Effect of corona ageing on the structure changes of polyimide and polyimide/Al2O3 nanocomposite films[J].
Impact of counterpart materials and nanoparticles on the transfer film structures of polyimide composites[J].
Effect of corona ageing on the structure changes of polyimide and polyimide/Al2O3 nanocomposite films[J].
Impact of counterpart materials and nanoparticles on the transfer film structures of polyimide composites[J].
Online since: May 2006
Authors: Ana M. R. C. Sousa, António Maurício C. Fonseca, Gilbert Kirsch, M. Manuela M. Raposo
The structures of the
thienylpyrrole azo dyes 1-2 were unambiguously confirmed by their analytical and spectral data.
The position of this band is strongly influenced by the structure of the compounds, for example by the type of substitution pattern in the donor and the acceptor moieties.
Jackson: The Chemistry of Heterocyclic Compounds; Vol. 48 Part 1, p. 295, R.
The position of this band is strongly influenced by the structure of the compounds, for example by the type of substitution pattern in the donor and the acceptor moieties.
Jackson: The Chemistry of Heterocyclic Compounds; Vol. 48 Part 1, p. 295, R.
Online since: July 2012
Authors: Yun Chen, Si Yu Yang, Ning Li, Li Juan Zhang, Yu Qian
Ultrasound-assisted Extraction of Imperatorin and Isoimperatorin from Roots of Angelica Dahurica
Yun Chen, Siyu Yang, Ning Li, Lijuan Zhang, Yu Qian
School of chemistry and chemical engineering,the state key laba for pulp and paper engineering
South China University of Technology
Guangzhou 510640, P R China
yunchen@scut.edu.cn
Keywords: ultrasound assisted extraction; imperatorin; isoimperatorin; scanning electron microscopy
Abstract.
In order to elucidate the extraction procedure and compare the changes of cells structure by using various kinds of extraction methods, samples were taken at the end of the extraction processes for scanning electron microscopy (SEM) analysis.
These observations suggest that ultrasonic wave has destructive effect on the structure of the cell due to the sudden internal pressure increase and the temperature rise and induces a subsequent change in the surface tension of the cellulose which could cause the plant to crumble or rupture more readily.
In order to elucidate the extraction procedure and compare the changes of cells structure by using various kinds of extraction methods, samples were taken at the end of the extraction processes for scanning electron microscopy (SEM) analysis.
These observations suggest that ultrasonic wave has destructive effect on the structure of the cell due to the sudden internal pressure increase and the temperature rise and induces a subsequent change in the surface tension of the cellulose which could cause the plant to crumble or rupture more readily.
Online since: February 2004
Authors: Yuichi Ikuhara, Takahisa Yamamoto, Hidehiro Yoshida, Katsuyuki Matsunaga
Analysis of grain boundary chemistry in Al2O3
Concerning the mechanism of the dopant
effects, a couple of ideas have been proposed so far.
A slight change was found in energy loss near edge structure (ELNES) spectra of Al-L1 and L2,3 edge peaks obtained from the grain boundaries and from the grain interior in doped-Al2O3, and such a change can be explained from cations segregation in the grain boundaries [24].
In order to make clear the origin of the change in local atomic bonding state, we have and made a first-principle molecular orbital calculation for the Al2O3 corundum structure with dopant cation substituted at Al cations site using the DV-X� method [25].
A slight change was found in energy loss near edge structure (ELNES) spectra of Al-L1 and L2,3 edge peaks obtained from the grain boundaries and from the grain interior in doped-Al2O3, and such a change can be explained from cations segregation in the grain boundaries [24].
In order to make clear the origin of the change in local atomic bonding state, we have and made a first-principle molecular orbital calculation for the Al2O3 corundum structure with dopant cation substituted at Al cations site using the DV-X� method [25].