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Online since: September 2011
Authors: Jian Hong Yang, Jin Wu Xu, Min Li, Chen Xi Zhao, Qun Zhang
The goal of PLS is to predict from and to describe the common structure underlying the variables, where is the matrix of dependent variables (), and is the matrix of independent variables () [9, 10].
However, the process of the prediction data is according to the structure of the regression data.
Without considering the difference of the sample spaces structure between the regression and prediction samples will cause low prediction accuracy.
Since these methods had some problems, considering the difference of the sample spaces structure between the regression and prediction samples, we modify the OSC algorithms step which preprocess the samples to be predicted
Analytical and Bioanalytical Chemistry, Vol.390 (2008), p.1241
However, the process of the prediction data is according to the structure of the regression data.
Without considering the difference of the sample spaces structure between the regression and prediction samples will cause low prediction accuracy.
Since these methods had some problems, considering the difference of the sample spaces structure between the regression and prediction samples, we modify the OSC algorithms step which preprocess the samples to be predicted
Analytical and Bioanalytical Chemistry, Vol.390 (2008), p.1241
Online since: December 2012
Authors: Ying Liu, Chang Ping Wei, Li Dan Dong
Preparation and Properties of Oligomeric Sulfonated Chitosan
Ying Liua, Changping Weib, Lidan Dongc
School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China
aliuying1981@yahoo.cn, bchangpiingwei@yahoo.com.cn, cdongxiaodan2004@163.com
Key words: sulfonated; IR; optimum conditions
Abstract: In the homogeneous system, the low molecular weight Chitosan is obtained by H2O2 oxidation degradation method.
The sulfonated chitosan derivatives with specific structure and molecular weight was designed as heparin alternatives, which possess better anticoagulant activity, cheaper and without side effects [2].
Fig.1 The structure N,O-sulfonated chitosan Fig.2 The structure of heparin The mainly sulfonation reagent of chitosan were concentrated sulfuric acid, SO2/SO3 and chlorine sulfonic acid, and the reaction generally occurred though non-homogeneous [4].
Ogawa, High-resolution solid-state 13C NMR study of chitosan and its salts with acids: conformational characterization of polymorphs and helical structure as viewed form the conform at ion- dependent 13C chemical shifts, Carbohydrate Polymers. 156 (1986)293-297
The sulfonated chitosan derivatives with specific structure and molecular weight was designed as heparin alternatives, which possess better anticoagulant activity, cheaper and without side effects [2].
Fig.1 The structure N,O-sulfonated chitosan Fig.2 The structure of heparin The mainly sulfonation reagent of chitosan were concentrated sulfuric acid, SO2/SO3 and chlorine sulfonic acid, and the reaction generally occurred though non-homogeneous [4].
Ogawa, High-resolution solid-state 13C NMR study of chitosan and its salts with acids: conformational characterization of polymorphs and helical structure as viewed form the conform at ion- dependent 13C chemical shifts, Carbohydrate Polymers. 156 (1986)293-297
Online since: July 2012
Authors: Hai Feng Zhou, Meng Xian Bai, Dong Jie Yang, Xue Qing Qiu
The influence of laccase modification on the adsorption of lignosulfonate
Haifeng Zhou1, a, Dongjie Yang1,b , Mengxian Bai1,c and Xueqing Qiu1,d,*
1State Key Lab of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, P.R.
Of the different pulping process, the structure of the technical lignin was different, for instance, lignosulfonate is a sort of water-soluble lignin derivative, produced as a by-product of sulfite pulping process [2].
Besides these hydrophobic structures, it has a considerable number of hydrophilic groups including sulfonic, phenolic hydroxyl and carboxylic acid groups [3].
Nevertheless, the industrial applications of lignosulfonate have been limited for its complex structure and dispersed molecular weight distribution.
However, to the best of our knowledge, detailed characterization of the resulting structure changes and adsorption are still partially understood.
Of the different pulping process, the structure of the technical lignin was different, for instance, lignosulfonate is a sort of water-soluble lignin derivative, produced as a by-product of sulfite pulping process [2].
Besides these hydrophobic structures, it has a considerable number of hydrophilic groups including sulfonic, phenolic hydroxyl and carboxylic acid groups [3].
Nevertheless, the industrial applications of lignosulfonate have been limited for its complex structure and dispersed molecular weight distribution.
However, to the best of our knowledge, detailed characterization of the resulting structure changes and adsorption are still partially understood.
Online since: December 2010
Authors: Hua Wei, Dong Li Li, Wen Cai Xu, Ya Bo Fu
Structure and Preparation of Composite films
Film Structure.
Also, DSC was applied to measure the inner film surface feature and the crystal structure of cross sections.
EVA content (%) Crystallization Temp. (℃) Melting Temp. (℃) Melting enthalpy (J/g) Crystallinity (%) 1 0 89.2 104.7 133.3 45.97 2 2 88.6 104.4 133.4 46.00 3 5 89.2 104.5 125.8 43.38 4 10 88.8 104.3 120.9 41.69 5 16 89.5 104.4 120.8 41.66 6 25 88.8 104.4 119.1 41.07 From the above data we can seen that the crystal structure of LDPE has not changed obviously when adding EVA less than 2%; The crystal property decreased apparently when adding EVA in a range of 5%~10%, but remains stable over 10%.When EVA content at 25%, the total crystallinity dropped to 41.07%.
[6] Liu Zhenhai, et al:Analytical Chemistry Handbook.
Also, DSC was applied to measure the inner film surface feature and the crystal structure of cross sections.
EVA content (%) Crystallization Temp. (℃) Melting Temp. (℃) Melting enthalpy (J/g) Crystallinity (%) 1 0 89.2 104.7 133.3 45.97 2 2 88.6 104.4 133.4 46.00 3 5 89.2 104.5 125.8 43.38 4 10 88.8 104.3 120.9 41.69 5 16 89.5 104.4 120.8 41.66 6 25 88.8 104.4 119.1 41.07 From the above data we can seen that the crystal structure of LDPE has not changed obviously when adding EVA less than 2%; The crystal property decreased apparently when adding EVA in a range of 5%~10%, but remains stable over 10%.When EVA content at 25%, the total crystallinity dropped to 41.07%.
[6] Liu Zhenhai, et al:Analytical Chemistry Handbook.
Online since: November 2012
Authors: De Cang Lou, Wen Guo, Zhi Guo Wang, Yong Hong Wang
In the PATH-SOCAR project [3], a fuel-cooled composite materials structure was designed for a Mach 8 air-breathing vehicle.
MBDA France and EADS ST developed a simple 1-D aero thermal-chemistry analysis code PUMA to provide primary analysis for scramjets such as CHAMOIS [3].
Other TMS design tools, such as VITMAC [5], have similar structures.
Figure 6 ThermalM integrated thermal management for TBCC propulsion system Figure 7 ThermalM fuel flow network with heat exchanger In this case, heat exchangers with two kinds of internal cooling structure, namely smooth and ribbed ducts (Figure 8), are modelled, respectively.
PTAH-SOCAR Fuel-cooled Composite Materials Structure for Dual-Mode Ramjet and Liquid Rocket Engines.
MBDA France and EADS ST developed a simple 1-D aero thermal-chemistry analysis code PUMA to provide primary analysis for scramjets such as CHAMOIS [3].
Other TMS design tools, such as VITMAC [5], have similar structures.
Figure 6 ThermalM integrated thermal management for TBCC propulsion system Figure 7 ThermalM fuel flow network with heat exchanger In this case, heat exchangers with two kinds of internal cooling structure, namely smooth and ribbed ducts (Figure 8), are modelled, respectively.
PTAH-SOCAR Fuel-cooled Composite Materials Structure for Dual-Mode Ramjet and Liquid Rocket Engines.
Online since: May 2014
Authors: Yuan Liu
It is a complex material system integrating material structure, smart management, execution system, control system, and sensor system together.
All the smart material’s properties of design, manufacture, process, and performance structure involve the forefront fields of material science, making smart material represents the activist aspect and the most advanced development direction of material science.
Advanced composite material is structure material that can substitute metal[4].
The development of modern chemistry widens the area of material.
As a result, it will lead to the great change of product structure and form new design style, promoting product design grows with leaps and bounds.
All the smart material’s properties of design, manufacture, process, and performance structure involve the forefront fields of material science, making smart material represents the activist aspect and the most advanced development direction of material science.
Advanced composite material is structure material that can substitute metal[4].
The development of modern chemistry widens the area of material.
As a result, it will lead to the great change of product structure and form new design style, promoting product design grows with leaps and bounds.
Online since: February 2011
Authors: Jia Ju An
Therefore, it only judges the oxidation film as a whole and don’t show its fine structure.
From the local histogram of film in figure (b), the porous layer structure is shown clearly, it has unique structure, and it is mainly made of the regular array columnar “cell”, there is a hole in every single “cell” in the center.
Materials Chemistry and Physics, Vol.97 (2006), p.215
From the local histogram of film in figure (b), the porous layer structure is shown clearly, it has unique structure, and it is mainly made of the regular array columnar “cell”, there is a hole in every single “cell” in the center.
Materials Chemistry and Physics, Vol.97 (2006), p.215
Online since: October 2010
Authors: Ran Ran Tian, Zhou Fa Zhou, Shu Mei Wang, Xiao Chun Dai, Chun Rong Wang, Yan Jie Li
Preparation of nano-Al2O3-coated ZrO2 modified by silane coupling agent
Ranran Tian 1, a, Zhufa Zhou 1, 2, b, Shumei Wang1, c, Xiaochun Dai1, d, Chunrong Wang1, e, Yanjie Li1, f
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
2National Engineering Laboratory of Modern Silk, Soochow University, Suzhou 215123, PR China
aziyanluebo@163.com, bzhouzhufa@suda.edu.cn, dweishumei@suda.edu.cn, cchunxiaodai86@yahoo.com, dbingdanxinzi@hotmail.com, eLYJ_03722_17@163.com
Keywords: Nano-Al2O3-coated ZrO2, A-151, Surface modification, Coated powders
Abstract.
Coarsening of the structure does not produce and there is no exaggerated grain growth in comparison with pure ZrO2.
The oxygen and silicon atom hinge structure is synthesized by the reactions of dethenyl of A-151 to form the active hydroxyls of adsorptionon on the surface of ZrO2 nanoparticles with removal of water.
However, the surface-doped structure offers the tuning of powder properties for new applications.
Coarsening of the structure does not produce and there is no exaggerated grain growth in comparison with pure ZrO2.
The oxygen and silicon atom hinge structure is synthesized by the reactions of dethenyl of A-151 to form the active hydroxyls of adsorptionon on the surface of ZrO2 nanoparticles with removal of water.
However, the surface-doped structure offers the tuning of powder properties for new applications.
Online since: September 2012
Authors: Frank J. Clemens, B. Koll, T. Graule, T. Watras, M. Binkowski, C. Mattmann, I. Silveira
Unfortunately Cochrane et al. could not manufacture fibrous structures with his compounds.
This can be explained by the rotation and translation of the asymmetric particles, i.e. structured carbon black agglomerates, which will result in an increase of electrical pathways [1,2].
Dufour, Design and development of a flexible strain sensor for textile structures based on a conductive polymer composite, sensors, vol. 7, no. 4, pp. 473-492, 2007
Ochoteco, "Polymer-Based Flexible Strain Sensor," Procedia Chemistry, vol. 1, no. 1, pp. 915-918, Sept.2009
This can be explained by the rotation and translation of the asymmetric particles, i.e. structured carbon black agglomerates, which will result in an increase of electrical pathways [1,2].
Dufour, Design and development of a flexible strain sensor for textile structures based on a conductive polymer composite, sensors, vol. 7, no. 4, pp. 473-492, 2007
Ochoteco, "Polymer-Based Flexible Strain Sensor," Procedia Chemistry, vol. 1, no. 1, pp. 915-918, Sept.2009
Online since: February 2011
Authors: Xu Dong Jin, Yue Hong Jin, Zhi Gang Cui, Yuan Yuan Li, Hai Bo Wang
Synthesis and Characterization of Binuclear Indium(Ⅲ) Complexes with
Bis-schiff Bases Derived from Benzidine or Its Derivatives
Xudong Jin1, a, Yuehong Jin2, b, Zhigang Cui1, c, Yuanyuan Li1, d, Haibo Wang1,e
1College of Chemistry, Liaoning University, Shenyang 110036, China
2Liaoning Provincial Institute of Measurement, Shenyang 110004, China
ajinxudong@yahoo.com, byw@lnjl.com.cn, cczg99263168@163.com, dliyuan1224@163.com, ewanghaibo413521@163.com
Keywords: Benzidine, Bis-schiff Base, Indium Complex, Binuclear
Abstract.
The compositions and structures of complexes were studied by the means of infrared spectrum, molar conductance, elemental analysis and thermal gravimetric analysis.
The proposed structure view of the complexes was shown in Fig.2.
Table 3 Thermoanalytical results of complexes Complex TG temperature rang/°C Weight loss/% Evolved moiety Found Calculated 1 100-150 220-250 250-400 400-600 4.13 4.17 9.28 25.07 3.96 3.96 10.05 25.27 Cl Cl 2 100-150 220-270 270-370 370-640 4.70 6.89 8.97 27.44 3.85 7.33 9.75 26.91 Cl Cl; OCH3 3 100-170 170-460 460-650 650-820 3.35 27.01 15.68 3.50 3.72 26.81 15.71 3.72 Cl Cl Fig.2 The proposed structure view of the complexes Acknowledgments This work was financially supported by Foundation of Liaoning Educational Committee (2008T065), Science and Technology Foundation of Liaoning Province (20071027) and the Scientific Research Foundation for the Returned Overseas Chinese Scholars (2005546), China.
The compositions and structures of complexes were studied by the means of infrared spectrum, molar conductance, elemental analysis and thermal gravimetric analysis.
The proposed structure view of the complexes was shown in Fig.2.
Table 3 Thermoanalytical results of complexes Complex TG temperature rang/°C Weight loss/% Evolved moiety Found Calculated 1 100-150 220-250 250-400 400-600 4.13 4.17 9.28 25.07 3.96 3.96 10.05 25.27 Cl Cl 2 100-150 220-270 270-370 370-640 4.70 6.89 8.97 27.44 3.85 7.33 9.75 26.91 Cl Cl; OCH3 3 100-170 170-460 460-650 650-820 3.35 27.01 15.68 3.50 3.72 26.81 15.71 3.72 Cl Cl Fig.2 The proposed structure view of the complexes Acknowledgments This work was financially supported by Foundation of Liaoning Educational Committee (2008T065), Science and Technology Foundation of Liaoning Province (20071027) and the Scientific Research Foundation for the Returned Overseas Chinese Scholars (2005546), China.