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Online since: July 2014
Authors: Feng Xu, Hai Ning Cui, Yong Jian Chen, Lin Zhu, Hai Shui Wang
China 2School of Chemistry and Chemical Engineering, South China University of Technology acuihaining2009@126.com Keywords: Copper Phthalocyanine film, transfer pressure, Monomolecular Layer.
In order to understand copper (Ⅱ) phthalocyanine (CuPc) nanometer assembly films and to design new film structure based on CuPc, it is very important to study the transfer pressure by means of Langmuir-Blogdett (LB) technique.
These results indicate that the monolayer structure may have undergone some irrecoverable changes for pressures higher than 40 mNm-1.
Chen (Changchun Institute of Applied Chemistry, China) for their help and support.
Online since: February 2013
Authors: Deng Chao Li, Jian Hua Wang, Yong Sheng Yang
The structure of monitoring system is shown in figure 2.
The arrangement diagram of thermocouple Conditioning Circuits The network of thermocouple PC MCU circuit level conversion K-thermocouple K-thermocouple K-thermocouple Conditioning Circuits Conditioning Circuits MCU circuit RF modules RF modules modules modules Fig.2 The structure of monitoring system The hardware circuit design of system The circuit diagram of front signal processing part of lower computer is shown in figure 3.
[2] Willett P R.Heat Generation in Tires Due to the Viscoelastic Properties of ElastomericComponents[J].Rubber Chemistry and Technology,1974,47(2):363-375
Tire Temperature[J].Rubber Chemistry and Technology,1971,44(2):397-439
Online since: September 2011
Authors: David E. Williams, M. Bhuvaneswari, Jadranka Travas-Sejdic
Effect of morphology of conducting polymer on DNA sensing Bhuvaneswari Kannan1,2 a, David.E.Williams1,2 b and Jadranka Travas-Sejdic*1,2 c 1 Polymer Electronic Research Centre (PERC), Department of Chemistry, University of Auckland, Private bag-92019, Auckland, New Zealand MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand abkan026@aucklanduni.ac.nz, bdavid.williams@auckland.ac.nz, cj.travas-sejdic@auckland.ac.nz Keywords: DNA sensor, conducting polymer, polypyrrole, impedance spectroscopy Abstract.
The role of physical and chemical structure of monomer, dopant [2], functional groups conjugation length [3] were studied previously.
We have recently reported that copolymers of pyrrole with functionalized pyrrole with unsaturated side chains have superior properties for use in biosensor application due to the extension of the polymer backbone conjugation toward the bio-probe which presumably causes the whole electronic structure to be more sensitive to perturbations caused by ODN hybridization [13, 12].
Travas-Sejdic: submitted to Analytical chemistry, 2011
Online since: June 2019
Authors: Sergey Sidelnikov, Kristina Bindareva, Viktor Leonov, Olga Lebedeva, Vladimir Lopatin, Edvard Rudnitskiy, Ekaterina Lopatina, D. Voroshilov
Pd-5Ni alloy was chosen as a material for research, the machining technology, the properties and structure of which are still insufficiently studied and poorly covered in the scientific and technical literature [1-5].
This alloy is widely used in the manufacture of catch nets, which have a woven structure and are installed after the catalyst grids.
M: Chemistry, 1983
M: Chemistry, 1985
Online since: September 2013
Authors: Fang Fang Shan, Yao Qing Chen, Jian Zhao Qin
Introduction HFPO is an important perfluorinated oxygen compound; it has become the intermediate product of many important organic fluorine materials of functionality because of the unique chemical activity of its three-ring structure [1,6].
The replacement of (some atom)by fluorine atom in the structure of HFPO reduces the stability of three-ring and makes its pyrolytic activation energy of 151.9kJ/mol lower than the hydrocarbon , which increases the difficulty in the synthesis of HFPO [5].
The common synthetic methods are H2O2 oxidation method, molecular oxygen oxidation method, hypochlorous acid salt oxidation method [2,3], electro-chemistry method [4], supercritical fluids method etc [6].
[2] Zhongxi Huang, Yongming Zhang, Heng Zhang etal, Research progress on the preparation of hexafluoropropylene oxide [J], Chemistry, 2004, (67)
Online since: February 2013
Authors: Tong Sun, Shu Ying Xu, Lian Li Liu, Li Li Wang
Quick lime modification and coagulation performance of nano-inorganic polymer coagulants from oil shale ash Tong Sun1,2,a*, Lian-li Liu3, Li-li Wang3 Shu-ying Xu1,2 1 Key Laboratory of Applied Chemistry, Bohai University, Jinzhou 121013, PR China 2 College of Chemistry, Chemical Engineering and food safety, Bohai University, Jinzhou 121013, PR China 3 Center for Science & Technology Experiment, Bohai University, Jinzhou 121013, PR China a jzsuntong@sina.com Keywords: coagulation; poly-ferric- aluminum-silicate- sulfate; oil shale ash; quick lime; sewage; turbidity; COD Abstract: The nano-inorganic polymer coagulant, poly-ferric-aluminum-silicate-sulfate (PFASS) modified by quick lime were prepared from oil shale ash, which were evaluated by treating sewage.
That is, adding calcium may be change the structure of the samples.
Conclusions Quick lime modification affects the morphology, crystal structure and coagulant efficiency of nano inorganic polymer coagulants (PFASS) prepared from oil shale ash.
Online since: November 2011
Authors: Gaetan Laroche, Maryam Mavadat, André Ricard, Stéphane Turgeon
Different plasma external parameters (pressure, input power and gas flow) affect the characteristics of the plasma and consequently the surface chemistry of plasma modified polymers.
As a matter of fact the chemistry of the discharge can be influenced by the gas temperature, since it governs the reaction rate of active species generation through dissociation, excitation, and ionization processes, and consequently, accurate knowledge of Tr is required to understand and control plasma processes.
In principle, the rotational temperature of N2 can be determined using various bands from either the first negative [2] or second positive system [3] through a Boltzmann plot, provided that the spectrometer resolution is high enough to separate the rotational structure of the bands or by fitting numerical models to the band envelope when medium to low resolution spectrometers are used [4].
However, despite the characteristics of the 1st positive system that make it a more reliable tool to estimate gas temperature (low excitation threshold, long radiative lifetime, higher predissociation level, and high emission intensity), its complex structure with 27 rotational branches has hampered its widespread use [4-6].
Online since: November 2007
Authors: Di Zhang, Hanna Arstila, Mikko Hupa, Heimo O. Ylänen, Erik Vedel, Leena Hupa
In vitro Behavior of Fiber Bundles and Particles of Bioactive Glasses Di Zhanga , Hanna Arstila b , Erik Vedel, Heimo Ylänen, Leena Hupa c, Mikko Hupa 1 Process Chemistry Centre, Åbo Akademi University, Piispankatu 8, 20500 Turku, Finland a zdi@abo.fi, bhanna.arstila@abo.fi, cleena.hupa@abo.fi Keywords: bioactive glass, fiber bundles, particle, in-vitro reaction, SBF Abstract.
A three layer surface structure was shown on the plates of 45S5 and S53P4.
Acknowledgements This work is part of the activities of the Åbo Akademi Process Chemistry Centre within the framework of the Centres of Excellence Programme by the Academy of Finland.
LaTorre: The evaluation of surface structure of bioactive glasses in-vitro.
Online since: January 2010
Authors: Xiang Zhong Ren, Pei Xin Zhang, Dong Yun Zhang, Li Gao, Hai Lin Peng, Qiu Hua Yuan
Crystallization Behavior and Performance of MgO-Al2O3-SiO2 Glass-Ceramics by Sintering Peixin Zhang1a, Li Gao1 , Qiuhua Yuan 1 , Hailin Peng1 , Xiangzhong Ren1 and Dongyun Zhang 2 1 School of Chemistry and Chemical Engineering, Shenzhen University , Shenzhen 518060, P.R.China 2 School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, P.R.
The product was dried and sized to get the powder, then the powder was pressed to obtained the green body using a performing machine, and the green body was sintered to obtain the glass-ceramics at a certain temperature. 2.2 Structure and Performance Testing The expansion coefficient of the glass-ceramic sample was measured by Netzsch 402L at a scan arte of 3°C/min.
Up to 1355 °C, although the crystallization increased, the grains grew rapidly, arraying randomly and even agglomerating, the aperture also grew, which made the porosity rise, therefore the density and flexural strength was both reduced. 1320 1330 1340 1350 1360 100 150 200 250 sintering temperature/℃ flexural strength /MPa 3.3 Influence on internal structure with sintering temperatures Fig.5 and Fig.6 show the changes in the micropores inside the material with the sintering temperatures.
Online since: May 2011
Authors: Wen Jian Wu, Yuan Lin An, Zhi Ming Liu, Gan Wang
Architecture Inspiration from the Microstructure and Bending Behavior of Nacre of Molluscan Shell Yuanlin Ana, Zhiming Liu, Gan Wang and Wenjian Wub Department of Chemistry and Biology, College of Science, National University of Defense Technology, Changsha, Hunan 410073, China aanyuanlin2005@yahoo.com.cn, bwjwu67@126.com Key words: Architecture; Nacre; Microstructure; Building materials; Toughening mechanism Abstract.
Nacre possesses multiscale laminated structure including the “BM” and “BBM” model and especially the brick (individual aragonite platelet) is made up of biopolymer and nanograins of aragonite.
Thus, the building materials in architecture should be designed as similar muiltiscale structure to obtain robust properties.
Su: Materials Chemistry and Physics, Vol. 114 (2009), p.367