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Online since: July 2011
Authors: Jin Hong Gao
Study on Pattern Recognition of Radix Cynanchi Paniculati Based on Ultraviolet Spectm
Jinhong Gao
Chemistry and Engineering Department, Weinan Teachers College, Shaanxi , Weinan 714000
dyd815@163.com
Keywords: Radix Cynanchi Paniculati, ultraviolet spectrum, pattern recognition
Abstract.
According to the compositions, structures and properties of medicinal materials, it utilizes the chemical method, instrument method or determination of physical constant to identify the authenticity of the medicinal materials.
Ultraviolet spectrometry can offer physical base structure information of the medicine, which is the adding of all chemical physical structure information.
According to the compositions, structures and properties of medicinal materials, it utilizes the chemical method, instrument method or determination of physical constant to identify the authenticity of the medicinal materials.
Ultraviolet spectrometry can offer physical base structure information of the medicine, which is the adding of all chemical physical structure information.
Online since: May 2011
Authors: Shan Shan Li, Shao Wen Du
Lower production temperature also reduces asphalt oxidation, and improves the life of pavement structure.
Stone Mastic Asphalt (SMA) mixtures are designed to have a high coarse aggregate content with stone-on-stone contact structure, modified asphalt mastic and fiber.
When temperatures below its melting point, Sasobit can forms a crystalline network structure that increased the stability and brittleness of binder.
Evotherm dispersive asphalt (DAT) technology is third generation Evotherm warm technology based on a chemistry solution technology [5].
Stone Mastic Asphalt (SMA) mixtures are designed to have a high coarse aggregate content with stone-on-stone contact structure, modified asphalt mastic and fiber.
When temperatures below its melting point, Sasobit can forms a crystalline network structure that increased the stability and brittleness of binder.
Evotherm dispersive asphalt (DAT) technology is third generation Evotherm warm technology based on a chemistry solution technology [5].
Online since: October 2010
Authors: Jun Lin Xie, Xiao Qing Liu
Influence of Carbon Content on the Qualities of Oxy-fuel Float Glass
Xiaoqing Liu 1-2, a, Junlin Xie 2,b
1 Department of Chemistry, Wuhan University of Technology, Wuhan 430070,China
2 Key Laboratory of Silicate Materials Science and Engineering, Ministry of Education, Wuhan University of Technology, Wuhan 430070,China
alczr@whut.edu.cn, bxjlclxy@126.com
Keywords: Carbon content, Oxy-fuel melting, Float glass
Abstract.
Water in glass melt can not only react with Si-O-Si to form many kind of Si-OH in different structure, which will lead to the crack of Si-O matrix and the increase of glass melt fluidity [10-12], but also improve the decomposition of sodium sulphate and help glass fining [13].
This is just the reason that s-2 has lower softening temperature, lower transition temperature, and higher coefficient of thermal expansion, because the bigger the water content, the greater the breakage of glass matrix [14-16], the lower the stability of glass structure.
The reducing of stability of glass structure will lead to the increase of the glass’s coefficient of thermal expansion and the decrease of glass transition temperature [17-18].
Water in glass melt can not only react with Si-O-Si to form many kind of Si-OH in different structure, which will lead to the crack of Si-O matrix and the increase of glass melt fluidity [10-12], but also improve the decomposition of sodium sulphate and help glass fining [13].
This is just the reason that s-2 has lower softening temperature, lower transition temperature, and higher coefficient of thermal expansion, because the bigger the water content, the greater the breakage of glass matrix [14-16], the lower the stability of glass structure.
The reducing of stability of glass structure will lead to the increase of the glass’s coefficient of thermal expansion and the decrease of glass transition temperature [17-18].
Online since: June 2011
Authors: Jian Jun Hao, Yan An Bai, Chong Rui Wang, Xin Yuan Liu
In order to obtain the information about microhardness and corrosion resistance of the Ni-TiO2 nanocomposite coating, the morphology and structure of the composite coatings were studied.
It is shown that the substrate size and cellular structure significantly change after adding TiO2 particles.
And compare with the pure Ni coating on the surface of cellular tissue, after adding TiO2 particles, the substrate size and cellular structure significantly smaller[9].
Beijing: Beijing Chemistry University (2006) [5] Jiang Jiqiong, Deng Xingshen,Liu Yongping.Application of nano-TiO2 in composite plating on nickel-based alloy: Electroplating & Finishing.
It is shown that the substrate size and cellular structure significantly change after adding TiO2 particles.
And compare with the pure Ni coating on the surface of cellular tissue, after adding TiO2 particles, the substrate size and cellular structure significantly smaller[9].
Beijing: Beijing Chemistry University (2006) [5] Jiang Jiqiong, Deng Xingshen,Liu Yongping.Application of nano-TiO2 in composite plating on nickel-based alloy: Electroplating & Finishing.
Online since: October 2011
Authors: Ling Cao, Dai Zong An, Yan Xin Wang, Shan Shan He, Chuang Ju Dong
Studies on the preparation and properties of sheet Ni-doped ZnO
Ling Cao 1,2 ,a, Daizong An 1,b, Yanxin Wang3,c ,Shanshan He3,d
and Chuangju Dong1,e
1 Faculty of Material Science & Chemistry Engineering, China University of Geosciences, Wuhan, Hubei, 430074, China
2 State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, Hubei, 430074, China
3 MOE Key Laboratory of Biogeology and Environmental Geology & School of Environmental Studies, China University of Geosciences, Wuhan, Hubei, 430074, China
alinger_cao@163.com, badz_cug@126.com, c yx.wang@cug.edu.cn,d565134803@qq.com,edongchuangju@163.com
Keywords: ZnO crystal, doping, homogeneous precipitation method.
Tab 1 shows the particular conditions of the method : Tab 1 The techniques for sheet nanometer ZnO prepared by zinc sulfate and nickel sulfate Sample number Conditions of precipitation reaction Conditions of form crystal Conditions of decompound c[ZnSO4] / [mol·L-1] n[NiSO4] /n[ZnSO4] T/℃ t/h v[ROH] /v[H2O] T/℃ t/h T/℃ t/h S-1 0.1 1:99 72 1.5 3:7 70 48 S-2 0.1 1:99 72 1.5 0 70 48 S-3 0.2 1:99 72 1.5 1:1 70 48 400 3 S-4 0.2 0.4:99.6 72 1.5 1:1 70 48 400 3 S-5 0.1 1:99 72 1.5 1:1 70 48 400 3 S-6 0.2 0 72 1.5 1:1 70 48 400 3 S-7 0.2 5:95 70 2 1:1 68 48 S-8 0.2 2:98 70 2 1:1 68 48 Optimize the precursor samples by XTJ30-micro image manipulation system, Fig1 shows the optimum sheet precursor sample: sample S-5 have larger transparent hexagonal sheet structure, very thin, have about 190-430μm widths.
Fig3 shows the optimum sheet Ni-doped ZnO. sample S-5, still remain the hexagonal structure ,the diaphaneity debased.
The cause of the change and the fine structure needs to study further.
Tab 1 shows the particular conditions of the method : Tab 1 The techniques for sheet nanometer ZnO prepared by zinc sulfate and nickel sulfate Sample number Conditions of precipitation reaction Conditions of form crystal Conditions of decompound c[ZnSO4] / [mol·L-1] n[NiSO4] /n[ZnSO4] T/℃ t/h v[ROH] /v[H2O] T/℃ t/h T/℃ t/h S-1 0.1 1:99 72 1.5 3:7 70 48 S-2 0.1 1:99 72 1.5 0 70 48 S-3 0.2 1:99 72 1.5 1:1 70 48 400 3 S-4 0.2 0.4:99.6 72 1.5 1:1 70 48 400 3 S-5 0.1 1:99 72 1.5 1:1 70 48 400 3 S-6 0.2 0 72 1.5 1:1 70 48 400 3 S-7 0.2 5:95 70 2 1:1 68 48 S-8 0.2 2:98 70 2 1:1 68 48 Optimize the precursor samples by XTJ30-micro image manipulation system, Fig1 shows the optimum sheet precursor sample: sample S-5 have larger transparent hexagonal sheet structure, very thin, have about 190-430μm widths.
Fig3 shows the optimum sheet Ni-doped ZnO. sample S-5, still remain the hexagonal structure ,the diaphaneity debased.
The cause of the change and the fine structure needs to study further.
Online since: November 2011
Authors: Yun Zhang, Xiang Rong Wang, Jia Wei Wang, Cai Yun Shi
Fig.1 shows the structure of chrysophanol.
Fig.1 Structure of chrysophanol Chrysophanol belongs to the anthraquinone derivatives, and has good molecule planarity.
It’s similar to the ordinary disperse dyes in structure and solubility.
Chrysophanol was purchased from Weiwei Institute of Plant Chemistry (Jiangsu, Huian).
Fig.1 Structure of chrysophanol Chrysophanol belongs to the anthraquinone derivatives, and has good molecule planarity.
It’s similar to the ordinary disperse dyes in structure and solubility.
Chrysophanol was purchased from Weiwei Institute of Plant Chemistry (Jiangsu, Huian).
Online since: October 2014
Authors: Ionel Dănuț Savu
The application of the microwaves, as thermal source, registers large number of technological processes as heat treatment, sintering, defrosting, de-polymerization, mineral processing or de-generation of structures [2-7].
Fig. 1 The equipment used Fig. 2 The controls of the for the welding process heating process during welding To reveal the type of the structure and its transformation after the welding process, Differential Scanning Calorimetry (DSC) was used.
Conclusions The general conclusions of the experimental are: · The weld has lower plasticity comparing to the base material due to the direct contact with the ceramic block or the ceramic powder which means faster heating and the modification of the chain structure.
Stadler, "Microwaves in Organic and Medicinal Chemistry", 1st.
Fig. 1 The equipment used Fig. 2 The controls of the for the welding process heating process during welding To reveal the type of the structure and its transformation after the welding process, Differential Scanning Calorimetry (DSC) was used.
Conclusions The general conclusions of the experimental are: · The weld has lower plasticity comparing to the base material due to the direct contact with the ceramic block or the ceramic powder which means faster heating and the modification of the chain structure.
Stadler, "Microwaves in Organic and Medicinal Chemistry", 1st.
Online since: February 2013
Authors: Min Liu, Shu Fang Jin, Ying Chen
Application of traditional materials on nanoscale leads to nanomodifiers of structure that will result in new materials with new and more perfect properties; new kinds of materials with higher resistance, cheaper and lighter, definitively an edge material for the twenty-first century.
Sun Radical graft functional modification of cellulose with allyl monomers: chemistry and structure characterization Carbohyd.
Uryu,The structure and mechanical properties of sheets prepared from bacterial cellulose, J.
Sun Radical graft functional modification of cellulose with allyl monomers: chemistry and structure characterization Carbohyd.
Uryu,The structure and mechanical properties of sheets prepared from bacterial cellulose, J.
Online since: July 2014
Authors: R. Senthilkumar, N. Arunkumar, R. Vijayaraj, Mohammed Manzoor Hussain
., Chennai, India
rsk1970@gmail.coma, narunkumar72@yahoo.comb, manzoorjntu@gmail.comc, vijayme2k@yahoo.co.ind
Key words: Powder Metallurgy, Micro Structure, Micro-hardness, Compressive Strength, Aluminum Alloy
Abstract.
Equivalent conventional micro-composites exhibit significantly lower strength compared to nano-structured materials motivating the need to better understand the micro-structural features of the metal matrix nano composite (MMNC) [5,6].
The variation in the XRD patterns denotes the change in structure and presence of reinforcement distribution.
References: [1] I.Mobasherpour,A.A.Tofigh,M.Ebrahimi,”Effect of nano-size Al2O3 reinforcement on the mechanical behavior of synthesis 7075 aluminum alloy composites by mechanical alloying”,Material chemistry and physics 138 (2013) 535-541
Equivalent conventional micro-composites exhibit significantly lower strength compared to nano-structured materials motivating the need to better understand the micro-structural features of the metal matrix nano composite (MMNC) [5,6].
The variation in the XRD patterns denotes the change in structure and presence of reinforcement distribution.
References: [1] I.Mobasherpour,A.A.Tofigh,M.Ebrahimi,”Effect of nano-size Al2O3 reinforcement on the mechanical behavior of synthesis 7075 aluminum alloy composites by mechanical alloying”,Material chemistry and physics 138 (2013) 535-541
Online since: August 2014
Authors: Francesco Micelli, Maria Antonietta Aiello, Emilia Vasanelli, Maria Sileo, Giovanni Leucci, Angela Calia
Non-destructive techniques have been improved and developed throughout the years and are nowadays applied to different kind of structures, namely masonry structures.
Aiello, Non-destructive techniques to assess mechanical and physical properties of soft calcarenitic stones, Procedia Chemistry..8C (2013) 35-44
Spanu, Some mechanisms of microstructure weakening in high-porous calcareous stones, Materials and Structures (2006), 39, 525–531.
Aiello, Non-destructive techniques to assess mechanical and physical properties of soft calcarenitic stones, Procedia Chemistry..8C (2013) 35-44
Spanu, Some mechanisms of microstructure weakening in high-porous calcareous stones, Materials and Structures (2006), 39, 525–531.