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Online since: January 2012
Authors: Diego Mantovani, P. Chevallier, Alejandra Reyna-Valencia
This is the case of bone, characterized by a layered structure consisting of strong inorganic platelets embedded in a soft, ductile organic matrix [4].
A wavelength higher than the usual 310mn was used to detect the presence of larger polymeric structures [8, 17].
Moreover, another factor certainly has an effect on the strength of the structure, namely, the presence of air bubbles [18].
Wess in: Collagen Fibrillar Structure and Hierarchies, in: Collagen: Structure and Mechanics, edited by P.
Giannelis: Chemistry of Materials Vol. 6 (1994), p. 1719
A wavelength higher than the usual 310mn was used to detect the presence of larger polymeric structures [8, 17].
Moreover, another factor certainly has an effect on the strength of the structure, namely, the presence of air bubbles [18].
Wess in: Collagen Fibrillar Structure and Hierarchies, in: Collagen: Structure and Mechanics, edited by P.
Giannelis: Chemistry of Materials Vol. 6 (1994), p. 1719
Online since: May 2011
Authors: Zan Zhi Wang, Franciscus Xaverius Supartono
After that, presents the trend of using Self Compacting Concrete (SCC) to improve the performance of concrete structures, i.e. its durability and reliability, because its highly flowing nature makes it suitable for placing concrete in difficult conditions and sections, especially with crowded steel reinforcement.
Utilization of SCC can also reduce the time required for placing large sections in concrete structures, e.g. in the basement or substructure’s concrete pouring.
This poor compaction can lead to produce voids and honeycombs that impair the durability as well as the stability of the structure.
Therefore, the polymer chemistry can be used to customize admixtures by regulating the above parameters or other variables to meet the needs of specific concrete performance[2].
Uomoto: New technologies for concrete structures: Self Compacting Concrete and Epoxy Coated Bars, ACECON 2005, Mumbai, 23 – 25 September 2005
Utilization of SCC can also reduce the time required for placing large sections in concrete structures, e.g. in the basement or substructure’s concrete pouring.
This poor compaction can lead to produce voids and honeycombs that impair the durability as well as the stability of the structure.
Therefore, the polymer chemistry can be used to customize admixtures by regulating the above parameters or other variables to meet the needs of specific concrete performance[2].
Uomoto: New technologies for concrete structures: Self Compacting Concrete and Epoxy Coated Bars, ACECON 2005, Mumbai, 23 – 25 September 2005
Online since: June 2014
Authors: Priscila Ferraz Franczak, Daiara Floriano da Silva, Nelson Heriberto Almeida Camargo, Nelson Levandowski
Calcium phosphates biocements are biomaterials that present crystallographic and mineralogical characteristics similar to human skeletal structure.
Materials Chemistry and Physics, n. 80 (2003) p. 269 – 277.
Materials Chemistry and Physics, n. 80 (2003) p. 269 – 277.
Online since: April 2010
Authors: Ke Jing Xu, Jin Tao Xi
Rare-earth elements have 4f electron structures, create multiple electron
configurations easily and have complex and abundant level structures and spectral characters.
The micelles changed structures were adsorbed on the surface of carriers and inhibited the load of carriers onto La(S,C)-TiO2 particles and induced the decrease of TiO2 amount in the film, which was consistent with Fig. 3(f).
Dong: Polish Journal of Chemistry, Vol.82( 2008), p. 2189.
The micelles changed structures were adsorbed on the surface of carriers and inhibited the load of carriers onto La(S,C)-TiO2 particles and induced the decrease of TiO2 amount in the film, which was consistent with Fig. 3(f).
Dong: Polish Journal of Chemistry, Vol.82( 2008), p. 2189.
Online since: December 2012
Authors: Lek Sikong, Wasin Triprakong
Effect of concentration of silver nitrate solution using as a starting reagent and temperature of heat treatment of the synthesized films on structure, morphology, crystallite size and grain size of AgNPs were investigated.
The AgNPs coated fibers were dried at room temperature and then characterized phase structure, morphology, AgNPs distribution on the film, crystallite size and grain coarsening effect.
Rao, Synthesis and surface chemistry of nano silver particles, Polyhedron 28 (2009) 2522–2530
Montazer, A review on the application of inorganic nano-structured materials in the modification of textiles: Focus on anti-microbial properties.
The AgNPs coated fibers were dried at room temperature and then characterized phase structure, morphology, AgNPs distribution on the film, crystallite size and grain coarsening effect.
Rao, Synthesis and surface chemistry of nano silver particles, Polyhedron 28 (2009) 2522–2530
Montazer, A review on the application of inorganic nano-structured materials in the modification of textiles: Focus on anti-microbial properties.
Online since: December 2014
Authors: Kien Wen Sun, Ming Hung Yu
Efficiency Improvement of Hybrid Solar Cells Using Solvent Modified PEDOT:PSS Hole Conducting Layer
Ming-Hung Yua and Kien Wen Sunb
Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
abiolab@faculty.nctu.edu.tw, bkwsun@mail.nctu.edu.tw
Keywords: hybrid; solar cell; solvent; conducting polymer
Abstract.
The hydrophobic PEDOT was surrounded by curled PSS chains so that it had higher solubility but the coiled benzoid structure also resulted in bad conductivity.
This indicates that the resonant structure of PEDOT chain changed from a benzoid to a quinoid structure.
The hydrophobic PEDOT was surrounded by curled PSS chains so that it had higher solubility but the coiled benzoid structure also resulted in bad conductivity.
This indicates that the resonant structure of PEDOT chain changed from a benzoid to a quinoid structure.
Online since: August 2011
Authors: Min Lin, Mei Li Zhang
The stochastic resonance has three components: system structure parameters, noise and weak signal.
SR has been observed in a large variety of systems in physics, chemistry, engineering, biology and biomedical.
But in many situations, however, the strength of the noise is not arbitrarily controllable and system structure parameters are fixed.
The Mode of Stochastic Resonance by Two Frequency Signals In the presence of noise and two different frequency signals, the structure diagram of bistable system is shown in Fig.1, and the motion of a Brownian particle in a bistable potential is given by (1) Where is a bistable potential function (2) Where is potential parameters of a nonlinear system, is a detected weak periodic signal with an amplitude and a frequency, is a control signal with an amplitude and a frequencyand. is a zero-mean, Gaussian white noise with autocorrelation function Where is the noise strength, is time delay of .
SR has been observed in a large variety of systems in physics, chemistry, engineering, biology and biomedical.
But in many situations, however, the strength of the noise is not arbitrarily controllable and system structure parameters are fixed.
The Mode of Stochastic Resonance by Two Frequency Signals In the presence of noise and two different frequency signals, the structure diagram of bistable system is shown in Fig.1, and the motion of a Brownian particle in a bistable potential is given by (1) Where is a bistable potential function (2) Where is potential parameters of a nonlinear system, is a detected weak periodic signal with an amplitude and a frequency, is a control signal with an amplitude and a frequencyand. is a zero-mean, Gaussian white noise with autocorrelation function Where is the noise strength, is time delay of .
Online since: July 2013
Authors: Hao Zhou Wang, Jian Min Zhang, Hui Dong Li
Simultaneously it uses the parallel processing, the reliable higher merit of FPGA to structure neural network.
According to changing capacity demands, neural network should be designed to middle-tier single hidden layer or hidden-layer structure and substitute fault characteristic values into the neural network, compare the real output with the actual fault classification values.
Design of FPGA test module FPGA test module structure is showed in Figure 3.
[2] Zhao Futu, Handbook of sensor integrated circuit, Beijing: Chemistry and Industry Press, (2004) 590-591
According to changing capacity demands, neural network should be designed to middle-tier single hidden layer or hidden-layer structure and substitute fault characteristic values into the neural network, compare the real output with the actual fault classification values.
Design of FPGA test module FPGA test module structure is showed in Figure 3.
[2] Zhao Futu, Handbook of sensor integrated circuit, Beijing: Chemistry and Industry Press, (2004) 590-591
Online since: February 2012
Authors: Zhang Long, Zhu Jian
Si structure layer thickness of capacitive micro-accelerometer and micro-gyroscope determines the functions, for example, sensitivity, measuring range, reliability etc. of the devices.
Reaction equations[3~5] are: Si+2NaOH+H2O→Na2SiO3+2H2↑ (1) Si+2 Na2SiO3+2 H2O→Na2Si2O5+2H2↑ (2) Si+2 Na2 Si2O5+2 H2O→Na2Si3O7+2H2↑ (3) Si+2 Na2 Si3O7+2 H2O→Na2Si4O9+2H2↑ (4) SiO2+2NaOH→Na2SiO3+ H2O (5) SiO2 +Na2SiO3→Na2Si2O5 (6) SiO2 +Na2Si2O5→Na2Si3O7 (7) There are two polishing plates of Poly-ammonic-ester solid plate (hard polishing plate) and Floss structure plate (soft polishing plate), CeO2 lapping agent and SF1 slurry supplied for polishing.
The scathe in surface can make devices structure cracked or curving.
Chemistry Industry Press, 2005, pp. 130~134.
Reaction equations[3~5] are: Si+2NaOH+H2O→Na2SiO3+2H2↑ (1) Si+2 Na2SiO3+2 H2O→Na2Si2O5+2H2↑ (2) Si+2 Na2 Si2O5+2 H2O→Na2Si3O7+2H2↑ (3) Si+2 Na2 Si3O7+2 H2O→Na2Si4O9+2H2↑ (4) SiO2+2NaOH→Na2SiO3+ H2O (5) SiO2 +Na2SiO3→Na2Si2O5 (6) SiO2 +Na2Si2O5→Na2Si3O7 (7) There are two polishing plates of Poly-ammonic-ester solid plate (hard polishing plate) and Floss structure plate (soft polishing plate), CeO2 lapping agent and SF1 slurry supplied for polishing.
The scathe in surface can make devices structure cracked or curving.
Chemistry Industry Press, 2005, pp. 130~134.
Online since: April 2012
Authors: Xin Fu
CO2 Capture by Polyethylenimine-Silica Mesoporous Hybrid
Xin Fu1,a
1 College of Chemistry and Life Science, Weinan Teachers University, Weinan 714000, PR China
a fuxin0117@163.com
Keywords: CO2 adsorbent; Capture; Polyethylenimine
Abstract: polyethylenimine-modified mesoporous hybrid material with the polyethylenimine (PEI) containing 50 wt% was synthesized.
Recently, it has been used as structure-directing agent in the preparation of mesoporous silica materials [6].
It can be seen that the sample consists of irregular porous structures with the pore diameters from 5 to 20 nm.
This result also demonstrates the PEI existence on the pore structure of the mesoporous materials.
Recently, it has been used as structure-directing agent in the preparation of mesoporous silica materials [6].
It can be seen that the sample consists of irregular porous structures with the pore diameters from 5 to 20 nm.
This result also demonstrates the PEI existence on the pore structure of the mesoporous materials.