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Online since: February 2020
Authors: Sergey Voropaev, Nikita Dushenko
Vernadsky Institute of Geochemistry and Analytical Chemistry Russian Academy of Science (GEOKHI RAS). 119991, Moscow, Kosygina str. 19, Russia
avoropaev@geokhi.ru
Keywords: diamond, graphite, isotope, cavitation, carbon, microelectronic, magnetism.
We have made corresponding experiments with benzene, toluene and ethanol to provide carbon nanoforms with different crystal structures.
The size effect depending on the structure of the hydrocarbon molecule indicates a significant role of fragments.
Point r1 = 0.154 nm in the vicinity of the first zero of the force function corresponds to the first coordination sphere in the diamond structure, point r2 = 0.250 nm (second zero) – the first coordination sphere in the FCC structure, and point r3 = 0.252 nm – the second coordination sphere in the diamond structure.
Li., Synthesis and crystal structure of n-diamond, Int.
We have made corresponding experiments with benzene, toluene and ethanol to provide carbon nanoforms with different crystal structures.
The size effect depending on the structure of the hydrocarbon molecule indicates a significant role of fragments.
Point r1 = 0.154 nm in the vicinity of the first zero of the force function corresponds to the first coordination sphere in the diamond structure, point r2 = 0.250 nm (second zero) – the first coordination sphere in the FCC structure, and point r3 = 0.252 nm – the second coordination sphere in the diamond structure.
Li., Synthesis and crystal structure of n-diamond, Int.
Online since: February 2013
Authors: Qi Zeng, Yan Yan Wu
This paper analyzes a large number of accidents causation factors and screens the main factors; finally the coal mine accidents hierarchical structure model is constructed.
The coal mine safety accidents mechanism refers to the inherent, interrelated unsteady material structure of the coal mine safety accidents occurrence [1].
(2) Establishing a hierarchy structure model.
Based on analyzing a large number of accidents causation factors, it constructs the coal mine accidents hierarchical structure model, as shown in fig. 2: Fig. 2.
The coal mine accident hierarchical structure model (3) Constructing the fuzzy consistent matrix.
The coal mine safety accidents mechanism refers to the inherent, interrelated unsteady material structure of the coal mine safety accidents occurrence [1].
(2) Establishing a hierarchy structure model.
Based on analyzing a large number of accidents causation factors, it constructs the coal mine accidents hierarchical structure model, as shown in fig. 2: Fig. 2.
The coal mine accident hierarchical structure model (3) Constructing the fuzzy consistent matrix.
Online since: August 2010
Authors: Kun Wan, Xiang Hong Peng, Ping Jing Du
Colloid TiO2 was gradually deposited to
form the anatase crystallographic structures, showing 2θ = 25.3°, 37.8°, 47.8° and 54.6°.
Structure of chitin/ TiO2 composite The FT-IR spectra of the chitin and chitin /TiO2 composite are shown in Figure 1.
The peaks at 1627 cm-1, 699 cm-1 and 572 cm-1 of the composite belong to the Ti-O structures [1, 15].
Figure 3b exhibits that the TiO2 crystal is multilayer and has porous structure, suggesting that the crystal structure TiO2 is gradually formed.
The TiO2 on the chitin shows a multilayer structure having crystallized anatase phase.
Structure of chitin/ TiO2 composite The FT-IR spectra of the chitin and chitin /TiO2 composite are shown in Figure 1.
The peaks at 1627 cm-1, 699 cm-1 and 572 cm-1 of the composite belong to the Ti-O structures [1, 15].
Figure 3b exhibits that the TiO2 crystal is multilayer and has porous structure, suggesting that the crystal structure TiO2 is gradually formed.
The TiO2 on the chitin shows a multilayer structure having crystallized anatase phase.
Online since: October 2008
Authors: Gianmario Martra, Elena Landi, Anna Tampieri, Raffaella Ceschino, Daniele Bollati, Luca Bertinetti
Martra1,f
1
Department of Chemistry IPM & NIS Centre of Excellence, University of Torino,
Via P.
Despite the consequent significant difference in the first hydration level between untreated and treated HA, the amount of adsorbed BSA, used as a model protein, remained essentially unchanged and the native structure of adsorbed protein was retained (as indicated by mid-IR ATR).
Introduction Since the definition of the concept of "biological/biomedical surface science" [1] the relevance of the relationships among biomaterial surface structure, states of adsorbed water molecules and states of adsorbed proteins has been recognized.
Near-IR spectroscopy in the diffuse reflectance mode was used to obtain insight on the interaction between such sites and BSA, the structure of which was assessed by mid-IR in the ATR mode.
The difference in intensity between the spectra of HAap and HA300 (curves a in Fig.s 2A and 2B, respectively) was a consequence of the different amount of exposed Ca2+ ions, while the difference in shape monitored the occurrence of differences in their local structure.
Despite the consequent significant difference in the first hydration level between untreated and treated HA, the amount of adsorbed BSA, used as a model protein, remained essentially unchanged and the native structure of adsorbed protein was retained (as indicated by mid-IR ATR).
Introduction Since the definition of the concept of "biological/biomedical surface science" [1] the relevance of the relationships among biomaterial surface structure, states of adsorbed water molecules and states of adsorbed proteins has been recognized.
Near-IR spectroscopy in the diffuse reflectance mode was used to obtain insight on the interaction between such sites and BSA, the structure of which was assessed by mid-IR in the ATR mode.
The difference in intensity between the spectra of HAap and HA300 (curves a in Fig.s 2A and 2B, respectively) was a consequence of the different amount of exposed Ca2+ ions, while the difference in shape monitored the occurrence of differences in their local structure.
Online since: August 2009
Authors: Qiang Wang, Liang Min Yu, Chang Cheng Li, Xia Li
A Novel Acrylic Resin Containing Methoxysilane Moiety and its
Application in Antifouling Coating
Qiang Wang
1a
,Liangmin Yu*1b,Changcheng Li1c
,Xia Li1d
1
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100,
PR China
a
e-mail: oceanwq@yahoo.cn; b*e-mail: yuyan@ouc.edu.cn; c
e-mail: lccqd@ouc.edu.cn; d
e-mail:
cutlery992@163.com
Key words: siloxane-acrylic resin; antifouling; performance evaluation
Abstract: As concerning the high toxicity of organotin paints, the need to develop new
environment-friendly antifouling agents has been highlighted.
Results and discussion 1 Spectral analysis and coating performance The formation of poly (I) resin structure disclosed as evidence by IR.
Especially, impact strength, flexibility and hydrophobic performance had been enhanced, owning to the helix of Si-O- bond and reticular structure.
Amide structure of AM copolymerized into poly (I) changed the micro-structure of surface and had killing bacteria property.
Hydroxyl group of HEA polymerized into ploy (II) cross-linked with -Si-OCH3, then changed the space configuration structure of the whole polymer into reticular structure which enhanced the coating hydrophobic and mechanical property.
Results and discussion 1 Spectral analysis and coating performance The formation of poly (I) resin structure disclosed as evidence by IR.
Especially, impact strength, flexibility and hydrophobic performance had been enhanced, owning to the helix of Si-O- bond and reticular structure.
Amide structure of AM copolymerized into poly (I) changed the micro-structure of surface and had killing bacteria property.
Hydroxyl group of HEA polymerized into ploy (II) cross-linked with -Si-OCH3, then changed the space configuration structure of the whole polymer into reticular structure which enhanced the coating hydrophobic and mechanical property.
Online since: October 2010
Authors: Jian Gang Niu, Hai En Xiang, Xiao Ping Dong, Li Guan, Fei Xie
We used the BFGS method for optimization of the geometry structure.
This means that, firstly, we optimized the structure of the unit cell.
The initial crystal structure were established according to the empirical data[7].
Table1 The crystal structure data of YNi2 and YMgNi4 Material Group (No.)
J Phys Condens Matter.Vol.10(1998),P.2933 [11] (In Chinese) Qian Y T. crystal chemistry(Chinese science and technology university press hefei 1988)
This means that, firstly, we optimized the structure of the unit cell.
The initial crystal structure were established according to the empirical data[7].
Table1 The crystal structure data of YNi2 and YMgNi4 Material Group (No.)
J Phys Condens Matter.Vol.10(1998),P.2933 [11] (In Chinese) Qian Y T. crystal chemistry(Chinese science and technology university press hefei 1988)
Online since: June 2006
Authors: Iis Sopyan
Results and Discussion
Polytitanosiloxanes: Synthesis and Structure.
Two hypothetic structures representing this assumption are presented in Fig. 1: ladder-type (A) and linear (B) structures.
From an elemental analysis in Table 1, undoubtly structure A is much closer to the found element composition, revealing it as the correct structure for polytitanosiloxanes.
The calculated values for the possible structures in Fig. 1.
Seyferth: in Materials Chemistry, An Emerging Disciple (ACS, USA 1995) [3] C.J.
Two hypothetic structures representing this assumption are presented in Fig. 1: ladder-type (A) and linear (B) structures.
From an elemental analysis in Table 1, undoubtly structure A is much closer to the found element composition, revealing it as the correct structure for polytitanosiloxanes.
The calculated values for the possible structures in Fig. 1.
Seyferth: in Materials Chemistry, An Emerging Disciple (ACS, USA 1995) [3] C.J.
Online since: June 2012
Authors: Jian Feng Zhu, Guang Liang Hu
It reveals that the surfaces of all as fabricated products possess a plain texture with the expected clear grain boundary for ceramic materials and that the grain structure is very homogeneous.
From the Fig. 2(a), it can be seen that the grain boundary is not very clear and that some small pores still exist in the structure, indicating the sample is not completely dense.
When the sintering temperature reaches 1300 °C, the structure is very dense and the grain boundary is also very clear, implying that the SnO2 grains are well crystallized with good integrality.
In addition, a large amount of large-sized pores exist in the structure, which can be attributed to the volatility of the liquid at high temperature.
A homogeneous grain structure, which is also very dense and clear, is obtained at the sintering temperature of 1300 °C.
From the Fig. 2(a), it can be seen that the grain boundary is not very clear and that some small pores still exist in the structure, indicating the sample is not completely dense.
When the sintering temperature reaches 1300 °C, the structure is very dense and the grain boundary is also very clear, implying that the SnO2 grains are well crystallized with good integrality.
In addition, a large amount of large-sized pores exist in the structure, which can be attributed to the volatility of the liquid at high temperature.
A homogeneous grain structure, which is also very dense and clear, is obtained at the sintering temperature of 1300 °C.
Online since: March 2015
Authors: Tao Huang, Lin Chen, Qing Qing Sun, Peng Zhou, David Wei Zhang
The above results suggest that the graphene film grown at 1060 ℃ has a bilayer structure.
At 1030 ℃ or below , the I2D/IG ratio is less than 1, indicating a multi-layer structure.
Four Lorentzian peaks fitting shown in Figure 5.a reveals a bilayer structure.
Under the condition at 1060 ℃ for 30 minutes, the graphene films grown on zinc oxide show a bilayer structure.
[10] BI, HUI, ET AL: JOURNAL OF MATERIALS CHEMISTRY VOL.22.2 (2012), P.411-416
At 1030 ℃ or below , the I2D/IG ratio is less than 1, indicating a multi-layer structure.
Four Lorentzian peaks fitting shown in Figure 5.a reveals a bilayer structure.
Under the condition at 1060 ℃ for 30 minutes, the graphene films grown on zinc oxide show a bilayer structure.
[10] BI, HUI, ET AL: JOURNAL OF MATERIALS CHEMISTRY VOL.22.2 (2012), P.411-416
Online since: September 2015
Authors: Jerzy Morgiel, Krzysztof Naplocha, Jacek W. Kaczmar
Subjected to firing binder at 950 °C formed strong joints between fibers and developed mechanically and thermally stable structure of preforms.
Results and discussion Prepared ceramic preforms were characterized by the open porosity structure with small amounts of binder.
The structure of the Saffil fibers was composed of small 50 nm subgrains (Fig. 1a), though in some places a-Al2O3 plates surrounded by the porosities occur.
Formanek, Structure and properties of aluminum cast composites strengthened by dispersion phases, Journal of Materials Processing Technology 175/1-3 (2006) 192-197
Dinardo, Thermal fatigue behaviour of a 2014/Al2O3-SiO2 (Saffil ® fibers) composite processed by squeeze casting, Materials Chemistry and Physics 64 (2000) 247-255
Results and discussion Prepared ceramic preforms were characterized by the open porosity structure with small amounts of binder.
The structure of the Saffil fibers was composed of small 50 nm subgrains (Fig. 1a), though in some places a-Al2O3 plates surrounded by the porosities occur.
Formanek, Structure and properties of aluminum cast composites strengthened by dispersion phases, Journal of Materials Processing Technology 175/1-3 (2006) 192-197
Dinardo, Thermal fatigue behaviour of a 2014/Al2O3-SiO2 (Saffil ® fibers) composite processed by squeeze casting, Materials Chemistry and Physics 64 (2000) 247-255