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Online since: June 2005
Authors: An Sha Zhao, Yong Xiang Leng, Guo Jiang Wan, Ping Yang, H. Sun, Nan Huang, Jun Ying Chen, Jin Wang, Pei Dao Ding
As shown in Fig.1, the surface chemistry, surface physics, surface morphology
of the material, as well as the biological species on a material surface, are possible factors to affect
the behavior of blood-material interaction.
Titanium oxide films Systematic researches on the relationship between different structure characteristics (such as amorphous, rutile, anatase etc.), different composition (such as non-stoicheometric Ti-O film, P, H, Ta, Al etc. elements doped TiO2 films), surface physical-chemical properties (such as electrical, semiconductive, surface tension) of the titanium oxide films and biological responses of blood on the film surface (proteins adsorption and denaturation, platelet adhesion and activation, clotting factors activating, in vivo implantation etc.) have been carried out.
It is believed that the Ti-O film with n-type semiconductor nature has the ability to prevent charges from transferring from fibrinogen into the material and thereby prevent the protein from denaturation Blood - Material interaction Specific biomolecular absorption , specific cells attachment, growth prevent coagulation system activation Prevent complement system activation Structure & composition of a layer Physic & chemical Characteristics of the surface Biochemical processes Topography & roughness Modified surface Surface related functions Surface modification processes Hybrid process (e.g. plasma + biological modification) Biological modification Ion Beam processes Plasma process Surface pattern etc.
Energy band structure of Ti-O/fibrinogen system, a)n-type semiconductor Ti-O /fibrinogen; b) p-type semiconductor/fibrinogen.
Our work shows that it is possible to modify the blood compatibility of DLC films by changing the structure characteristics such as changing the bonding state or doping the films with other elements, etc.
Titanium oxide films Systematic researches on the relationship between different structure characteristics (such as amorphous, rutile, anatase etc.), different composition (such as non-stoicheometric Ti-O film, P, H, Ta, Al etc. elements doped TiO2 films), surface physical-chemical properties (such as electrical, semiconductive, surface tension) of the titanium oxide films and biological responses of blood on the film surface (proteins adsorption and denaturation, platelet adhesion and activation, clotting factors activating, in vivo implantation etc.) have been carried out.
It is believed that the Ti-O film with n-type semiconductor nature has the ability to prevent charges from transferring from fibrinogen into the material and thereby prevent the protein from denaturation Blood - Material interaction Specific biomolecular absorption , specific cells attachment, growth prevent coagulation system activation Prevent complement system activation Structure & composition of a layer Physic & chemical Characteristics of the surface Biochemical processes Topography & roughness Modified surface Surface related functions Surface modification processes Hybrid process (e.g. plasma + biological modification) Biological modification Ion Beam processes Plasma process Surface pattern etc.
Energy band structure of Ti-O/fibrinogen system, a)n-type semiconductor Ti-O /fibrinogen; b) p-type semiconductor/fibrinogen.
Our work shows that it is possible to modify the blood compatibility of DLC films by changing the structure characteristics such as changing the bonding state or doping the films with other elements, etc.
Online since: March 2015
Authors: Ke Xin Zhou, Chen Hao Xu, Yi Xiang Chen, Kai Xi An
Finally, he takes the cement strength as evaluation parameters and draws the conclusion that additives can improve soil gradation, promote the cement hydration and soil aggregate structure, enhance the connection of soil and reduce the moisture content to further increase the strength of cement-soil.
The strength from the combination of cement’s framework and hydrated lime’s physical chemistry role is obtained.
The latter build a firm structure for clod and micelle, while cement is mixed with these clods to form a firm structure.
Acknowledgements The research was financially supported by Key Laboratory of Civil Engineering Structures & Disaster Prevention and Mitigation Technology of Zhejiang Province and Yunhe Cup project of Zhejiang University of Technology (No. 2013165).
The strength from the combination of cement’s framework and hydrated lime’s physical chemistry role is obtained.
The latter build a firm structure for clod and micelle, while cement is mixed with these clods to form a firm structure.
Acknowledgements The research was financially supported by Key Laboratory of Civil Engineering Structures & Disaster Prevention and Mitigation Technology of Zhejiang Province and Yunhe Cup project of Zhejiang University of Technology (No. 2013165).
Online since: January 2013
Authors: Ren Jang Wu, Mei Yun Chen
Fast Detection of Local Anesthetic Ropivacaine by Impedance Method on Polypyrrole-Graphene Oxide
Ren-Jang Wu* and Mei-Yun Chen
Department of Applied Chemistry, Providence University, Shalu, Taichung 43301, Taiwan, ROC.
It was assigned belong to graphene oxide structure, and it was proved blending structure formation in Ppy/1% GO.
Fig. 4 (c) presented shape of Ppy/1% GO sample was like oval ball, it can be explained structure of the sample was Ppy coated on the surface of Ppy.
Sheet like structure of Ppy was on the surface of black color GO, it was revealed in Ppy/1% GO sample in Fig. 5.
It was assigned belong to graphene oxide structure, and it was proved blending structure formation in Ppy/1% GO.
Fig. 4 (c) presented shape of Ppy/1% GO sample was like oval ball, it can be explained structure of the sample was Ppy coated on the surface of Ppy.
Sheet like structure of Ppy was on the surface of black color GO, it was revealed in Ppy/1% GO sample in Fig. 5.
Online since: December 2014
Authors: Zhi Yuan Yang, De Chao Wang, Jin Lin Jiang
Combustion Behavior and Combustion-supporting Mechanism of KMnO4 on Mixing Pulverized Coals and Semicoke in Blast Furnace Injection
YANG Zhi Yuan1,a *, WANG De Chao1,b,JIANG Jin Lin1,c
1 College of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, P.R.
The combustion-supporting mechanism was that Mn7+(CO-)7 weakens the bridged bond binding force among carbon structure units and changes lattice structure.
When it was decomposed in the heating, Mn7+(CO-)7 weakened bridged bond force among carbon structural units and changed lattice structure.
The crystal of carbon ring structure is 100 peak and 110 peak in the patterns, corresponding sweep range is about 43°, 78°.
The crystallite size of unburned pulverized coal became larger in structure.
The combustion-supporting mechanism was that Mn7+(CO-)7 weakens the bridged bond binding force among carbon structure units and changes lattice structure.
When it was decomposed in the heating, Mn7+(CO-)7 weakened bridged bond force among carbon structural units and changed lattice structure.
The crystal of carbon ring structure is 100 peak and 110 peak in the patterns, corresponding sweep range is about 43°, 78°.
The crystallite size of unburned pulverized coal became larger in structure.
Online since: March 2012
Authors: Usarat Ratanakamnuan, Yan Yong Ninsin
Synthesis of Rice Straw Cellulose Ester for Use as
Biodegradable Plastic Film
Usarat Ratanakamnuan1, a and Yanyong Ninsin1, b
1Department of Chemistry, Faculty of Science, Maejo University, Chiang Mai, 50290, Thailand
ausarat@mju.ac.th, byansin0@hotmail.com
Keywords: Cellulose, Rice Straw, Esterification, Biodegradable film
Abstract.
Chemical structure and properties of modified cellulose such as morphology, thermal stability, and solubility were investigated.
The resulting high intermolecular forces, in addition to the regular structure of the polymer, result in its high degree of crystallinity.
Moreover, rice straw cellulose did not show glass transition temperature due to their high crystalline structure.
Introduction of hydrophobic acyl group in the molecular structure of cellulose is expected to alter its solubility properties.
Chemical structure and properties of modified cellulose such as morphology, thermal stability, and solubility were investigated.
The resulting high intermolecular forces, in addition to the regular structure of the polymer, result in its high degree of crystallinity.
Moreover, rice straw cellulose did not show glass transition temperature due to their high crystalline structure.
Introduction of hydrophobic acyl group in the molecular structure of cellulose is expected to alter its solubility properties.
Online since: May 2011
Authors: Meng Jiao Gao, Lai Chen, Yong Sheng Hua, Jia Bao Zhang, Jian Feng Pan, Chun Jie Zhou, Mu Su Ren, Jin Liang Sun
The ablation mechanisms of the C/C-ZrC-SiC composites were supposed to be the synergistic effects of thermo-chemistry ablation (oxidation and sublimation) and mechanical erosion.
The pyrocarbon kept the onion-like structure, and the carbon fiber was ablated a little bit acutely, but the surface was smooth.
The pyrocarbon kept the onion-like structure, and the carbon fiber was ablated a little bit acutely, but the surface was smooth.
Online since: September 2013
Authors: Xian Li Liu, Wei Ji, Han Yang Li, Hai Yan You, Meng Chao Fan
Secondly, tool wear mechanisms are researched by combining the tribology and chemistry.
Its key factors of performance are listed below: l The structure, hardness and certain material content of workpiece.
Its key factors of performance are listed below: l The structure, hardness and certain material content of workpiece.
Online since: June 2013
Authors: Ming Hua Huang, Qing Hua Chen, Li Lei, Duan Cheng Wang, Ting Ting Yan
The synthetic acicular HAP whiskers and the needle-like hydroxyapatite crystals of human bone have the same chemical composition and crystal structures.
(a) is the XRD of the three-dimensional network-structure KGM after crosslink and deacetylation.
The various pores in the scaffolds are formed in the freeze-drying process since firstly the absorbed water in the crosslinked network-structure gel becomes ice crystals and then ice crystals sublimate.
This is because the degraded matter before 9 weeks is mainly the HAPw and the konjac glucomannan degradation is relatively slow due to the three-dimensional network-structure by crosslink.
Lin: Structural Chemistry Vol. 11(6)(2003), p. 633-642, In Chinese [7] Y.Q.
(a) is the XRD of the three-dimensional network-structure KGM after crosslink and deacetylation.
The various pores in the scaffolds are formed in the freeze-drying process since firstly the absorbed water in the crosslinked network-structure gel becomes ice crystals and then ice crystals sublimate.
This is because the degraded matter before 9 weeks is mainly the HAPw and the konjac glucomannan degradation is relatively slow due to the three-dimensional network-structure by crosslink.
Lin: Structural Chemistry Vol. 11(6)(2003), p. 633-642, In Chinese [7] Y.Q.
Online since: February 2008
Authors: Hideo Nakajima, Ryusuke Nakamura, Daisuke Tokozakura, Jong Hoon Lee, Jung Goo Lee, Hirotaro Mori
The
produced hollow zinc oxide had the wurtzite structure.
The corresponding Debye-Scherrer rings can consistently be indexed as those of bulk zinc with a hexagonal structure.
The Debye-Scherrer rings in the SAED (Fig. 2 (a')) can be consistently indexed as those of pure zinc superimposed with those of zinc oxide (ZnO) having the wurtzite structure which is the thermodynamically stable structure of ZnO at RT [10].
wurtzite structure.
Lide, in: Handbook of Chemistry and Physics, 84 th edition, CRC Press, (2004)
The corresponding Debye-Scherrer rings can consistently be indexed as those of bulk zinc with a hexagonal structure.
The Debye-Scherrer rings in the SAED (Fig. 2 (a')) can be consistently indexed as those of pure zinc superimposed with those of zinc oxide (ZnO) having the wurtzite structure which is the thermodynamically stable structure of ZnO at RT [10].
wurtzite structure.
Lide, in: Handbook of Chemistry and Physics, 84 th edition, CRC Press, (2004)
Online since: May 2011
Authors: Guo Cong Liu, Ke Long Huang
Polymorphological LaVO4:Dy3+ phosphors: hydrothermal synthesis and luminescent properties
Guocong Liu1, 2,a, Kelong Huang1,b
1College of Chemistry and Chemical Engineering, Central South University, ChangSha 410083, Chin
2 Institute of Advanced Materials & Chembiosensing Technology, Yulin Normal Univesty, Yulin 537000, China
a gcl_109@163.com, b klhuang@mail.csu.edu.cn
Key words: LaVO4:Dy3+; hydrothermal synthesis; growth mechanism;luminescence
Abstract.
However, previously there have been few studies focused on the synthesis and properties of polymorphological LaVO4:Dy3+ structures by aqueous solution methods.
These results indicate that LaVO4:Dy3+ crystals with tetragonal structure have been successfully synthesized via a facile hydrothermal route.
Since LaVO4:Dy3+ has an anisotropic crystal structure, the low concentration of reactants favors the preferred growth of LaVO4:Dy3+ nuclei along c axis and form rod-like particles (S1).
However, previously there have been few studies focused on the synthesis and properties of polymorphological LaVO4:Dy3+ structures by aqueous solution methods.
These results indicate that LaVO4:Dy3+ crystals with tetragonal structure have been successfully synthesized via a facile hydrothermal route.
Since LaVO4:Dy3+ has an anisotropic crystal structure, the low concentration of reactants favors the preferred growth of LaVO4:Dy3+ nuclei along c axis and form rod-like particles (S1).