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Online since: May 2016
Authors: Ivan Juríček, Ľudovít Fillo
The function of water in terms of concrete structure production is properly described by such distribution of water in concrete.
The air has to circulate by sufficient speed along every surface of the structure.
It is necessary to drain the water sucked from the structure from the vacuum space after every cycle.
The heating of the structure can be ensured by several methods.
Vnútorné ošetrovanie a elektrické charakteristiky betónu – in Slovak) Beton, TKS, Vol. 13, No. 6, 2013 Beton TKS, Praha 2013 [9] ‪http://www.columbia.edu/itc/chemistry/environmental/lectures/week2.pdf‬‬‬‬‬‬.
Online since: September 2012
Authors: Takamitsu Ueki, Toshihiro Hirai, Hong Xia, Mohammad Ali, Minoru Hashimoto, Takafumi Ogiwara, Keiichi Yamamoto, Daijiro Tsurumi
By varying the plasticizer structure, the breed out of the plasticizer can be controlled under the experimental conditions, and thus the PVC gels can be used as stable materials.
The structure of the focus control system can also be very simple, and have just lens and electrodes with no mechanical parts in it [12].
Device structure is also so simple.
Hirai, Electrically induced creeping and bending deformation of plasticized poly(vinyl chloride), Chemistry Letters, 2001, 360-361
Fujii, Master Thesis (Hirai Lab., 2007) , Creep Deformation of Plasticized PVC and the Effect of Plasticizer Structure [9] M.
Online since: June 2014
Authors: Xian Zhen Diao, Dong Zhou
Infrared spectrum study Molecular structures of samples analysed by German Bruker company's Equinox 55 type Fourier infrared spectrometer, scope of its wave number: 4000-400cm-1; Accuracy of wave number: ≤4cm-1(4000-2000), ≤2cm-1(2000-400); Resolution: 1.5 cm -1; Through the rate of accuracy: ±0.2%T; l0 line straightness:≤±2%T.
Because in low temperature calcination, TiO2 is amorphous structure and exists defects more, a lot of defects become the center of electrons and holes in the compound, electron and hole structure is difficult to reach surface involved in photocatalytic reaction, thus TiO2 has lower light catalytic activity; With the increase of calcination temperature, the degree of crystallization and the density of surface structure are improved, its internal fewer defects become the center of electrons and holes in the compound, thus TiO2 has higher photocatalytic activity.
When calcining temperature is too high, however, grain growth, the effective surface area of TiO2 is reduced, REDOX ability is reduced, TiO2 surface active hydroxyl amount is reduced, and high temperature calcining can make the crystal structure of TiO2 from anatase to rutile type, so its photocatalytic activity also decreases.
Photocatalytic activities and electronic structure analysis of N2 doped anatase TiO2 : a combined experimental and theoretical study[J].
Band structure controlled solid solution of Cd1-xZnx photocatalyst for hydrogen production by water splitting[J].
Online since: January 2012
Authors: Rui Yin, Lan Yang, Sai Long Xu
The structure, morphology and optical property were investigated, and effect of doping content on the microstructure of the resulting composite films was examined.
These reflection peaks can be indexed to Wurtzite structure of ZnO, belonging to hexagonal crystal system, P63mc symmetry (JCPDS-750576).
The composite films have an embedded structure, in which ZnO grains are embedded in ZnAl2O4 matrix and ZnO crystal with grains varied by the doping.
Acknowledgement We gratefully acknowledge financial support from the National Natural Science Foundation of China, Open Project Program of Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education, and the Beijing Nova Program (2007B021).
Duan., “Influence of iron substitution on formation and structure of Cu-based mixed oxides derived from layered double hydroxides,” J.
Online since: July 2013
Authors: Osman M. Shabanov, P.T. Kachaev, Sagim I. Suleymanov
Suleymanovc Department of Physical Chemistry, Dagestan State University, M.
Molten electrolytes are, more or less, structured.
What is more structured molten electrolyte, the lower its conductivity.
In consequence of these changes in the structure of the molten salts their conductivity increases and characteristic Raman spectra peak disappears.
Limiting conductivity and structure of molten alkali earth metal chlorides.
Online since: February 2013
Authors: V. Tebaldo, G. Martra, F. Cartasegna, Giovanna Maria Gautier di Confiengo, M. Faga
Study of Wear Phenomena of Coatings for Die-casting G.Gautier1,a, M.Faga1,b, V.Tebaldo1, c, G.Martra2,d, F.Cartasegna3, e 1National Research Council- Institute for Agricultural and Earthmoving Machine, Strada delle Cacce 73, 10135 Torino, Italy 2 University of Turin, Department of Chemistry, via P.
Because of the grain dimensions (<10nm) the dislocation inside the structure are hindered and consequently the hardness is high.
The nanocomposite coating presents the following structure: a single layer, a gradient layer, a multilayer part (5 layers) and a external layer.
This part presents an alternate multilayer structure A-B.
AlSi (cathode 2) were set changing the arc current between 59 and 240% in order to create the A-B coating structure.
Online since: May 2021
Authors: L.S. Elbakyan, D.E. Vilkeeva, I.V. Zaporotskova
Currently, there are many expectations of the creation of composite structures based on nanomaterials in solving technological problems in various fields [5].
Harris, Carbon Nanotubes and Related Structures: New Materials of the XXI Century, Moscow, Russia, 2003
Zaporotskova, Carbon and Non-Carbon Nanomaterials and Composite Structures Based on Them: Structure and Electronic Properties, Volgograd, Russia, 2009
Siverpga, Acrylic oligomers and materials based on them, M., Chemistry. (1982) 242
Avouris, Carbon Nanotubes: Synthesis, Structure, Properties, and Application, Berlin/Heidelberg, Germany, 2001
Online since: October 2010
Authors: Dilek Teker, Can Poyraz Sağ, Mehmet Dinçer, Sedat Alkoy, Koray Öztürk
Gerth et al. [16] reported that the 2p3/2 peak was located between 346.85 and 346.95 eV when Ca is bound within hydroxyapatite structure, located at 347.55 eV when Ca is bound within calcium fluoride structure and located at 345.80 eV when Ca is bound within Ca(OH)2 structure.
On the other hand, when calcium is bound in CaTiO3 structure, the Ca 2p3/2 peak is located at around 346 eV, as reported by Asami et al. [15].
Crystal Structure of The Coatings.
Since bio-mimetically grown apatite has a porous structure, contraction of the coatings occurs due to evaporation.
As the coating thickness increased with soaking time (especially for two weeks and longer time periods), crack formations in coatings were observed regardless of the chemistry of the hydrothermal environment.
Online since: August 2016
Authors: Sylma Carvalho Maestrelli, Alfeu Saraiva Ramos, Vera Lúcia Arantes, Jeferson Almeida Dias, Tania Regina Giraldi, Marília Zani Minucci, Mauro F. Toledo
Fig.2 (B) shows the schematic representation of crystalline structure of ZnO, which presents hexagonal symmetry (wurtzite structure).
(B) Crystalline structure of ZnO.
The experimental parameters a and c of crystalline structure were also presented.
Table 3 - Average crystallite size, strain and lattice parameters of crystalline structure.
Giraldi et al.: Materials Chemistry and Physics (2012), p. 1
Online since: March 2017
Authors: Šárka Msallamová, Jaroslav Jiřík, Kateřina Šálková, Michaela Fousová, Drahomír Dvorský, Tereza Šálková, Tomáš Hiltscher, Daniel Hlásek, Jan John, Martin Pták, Jiří Dohnal, Zdeněk Jáně
Grinded and polished specimens were etched with the Ratin´s solution (5g NaCl, 25ml HCl, 37ml ethanol and 5ml H2O) and their structure was observed by the light inverse metallographic microscope Olympus PME 3 and the scanning electron microscope Tescan Vega 3 (SEM).
The characteristic twinning of grains and a large number of copper sulphide inclusions are visible in the bronze structure imaged by a light microscope PME3 (Fig. 4).
There is also visible the characteristic dendritic structure.
The characteristic dendritic structure of copper alloy, copper sulphide inclusions and intermediate phases were identified in the copper structure using a light microscope (Fig. 9).
The characteristic material structure shows that the winged-flanged bronze axe was probably produced by hammering with following recrystallization annealing.