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Nano-apatite/Polymer Biocomposite for Tissue Engineering

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Journal of Wuhan university of Technology(Materials Science) 2005年第B12期20卷 126-128页

作者：魏杰 Institute of Biomaterials East China University of Science and Technology Shanghai 200237China

A new kind of tissue engineering scaffold materials of nano-apatite （ NA ） and polyamide6 （ PA6 ） biocomposite was prepared by means of the co-solution method. The NA crystals uniforndy distribute in the composite with a size of 10-30 nm in diameter by 50-90 nm in length. The NA/ PA6 composite has good homogeneity and high NA content, and excellent mechanical properties close to those of natural bone. The porous 3-D scaffold has not only macropores, but also micropores on the walls of macropores with porosity of about 80% and the size of pore diameter of about 300μm made by injection foam. The biocomposite can be used for bone repair and as scaffolds in tissue engineering.

关键词： biocomposite nano apatite tissue engineering scaffold material

Theoretical studies of rovibrational spectrum and potential energy function for Ar-N_2.complex

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Chinese Science Bulletin 1997年第1期42卷 43-46页

作者： YAN Guosen, XIE Junkai and XIE DaiqianDepartment of Chemistry, sichuan university, chengdu 610064,{{2. Department of Chemistry Sichuan University Chengdu China

THE Ar-N2.complex plays an important role in atmosphere chemistry. Recently, the potential energy functions （PEF） CPV, BTT, MMSV, M3SV, MMSV’ have been determined by comparing the relevant experimental information,... 详细信息

THE Ar-N2./sub> complex plays an important role in atmosphere chemistry. Recently, the potential energy functions （PEF） CPV, BTT, MMSV, M3SV, MMSV’ have been determined by comparing the relevant experimental information, such as the molecular beam scattering measurements, virial coefficient data, bulk transport and relaxation phenomena, pressure-broadening and shift of spectroscopic infrared and Raman lines. The pure rotational spectrum of the Ar-14N2./sub>, Ar-15N2./sub>, and Ar-14N 15N isotopomers have been measured by Jager

关键词： potential energy function van der Waals vibrational states intensity and isotope effects.

Interaction of bis-aryl functionalized molecules with nucleosides and nucleic acids

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Science china Chemistry 2010年第1期53卷 103-112页

作者： HUANG Yu1,LIU JunLiang1,ZHANG Ji1,LIU Qiang1,HOU JiTing1,ZHANG Yu1,ZHANG DaWei2.LU QiaoSen1,CHEN ShanYong1,LIN HongHui2.& YU XiaoQi1 1 Key Laboratory of Green Chemistry and Technology,Ministry of Education College of Chemistry,{2. university,{2. 610064,china 2.Key Laboratory of Bio-resources and Eco-environment,Ministry of Education College of Life Sciences,{2. university,{2. 610064,china. 1. Key Laboratory of Green Chemistry and Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China2. Key Laboratory of Bio-resources and Eco-environment Ministry of Education College of Life Sciences Sichuan University Chengdu 610064 China

A series of novel molecules with a cyclen(1,4,7,10-tetraazacyclododecane) moiety appended on and bearing different aromatic fragments in the structures were synthesized and *** binding activities of these compounds towards DNA were systematically studied by spectroscopic,viscometric and gel electrophoresis *** results suggest that the stacking interaction plays an important role in improving the DNA binding ability of the *** binding modes of the compounds towards DNA are also affected by the sizes of the aromatic *** binding interaction between binaphthyl compound 1b and several nucleosides was studied by fluorescence *** interaction and hydrophobic interaction play the key role in such non-selective binding process.

关键词： stacking and hydrophobic interactions DNA binding aromatic compounds nucleosides oligonucleotides

INFLUENCE OF PRECIPITATES ON THE TWO WAY SHAPEMEMORY EFFECT

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Acta Metallurgica Sinica(English Letters) 1997年第3期10卷 166-173页

作者： M Liu XM Zhang M.Z. Liu X.M. Mengand Y Y Li(Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, china)(Metal Material Department, sichuan Union {{2., chengdu 610065, china) Inst of Metal Research Chinese Acad of Sciences Shenyang China

In this paper by means of TEM and HREM, we found that the presence of r-phase plays the most important role in enabling two way shape memory effect (TWME) to be obtained by the stabilization of stress induced martensite variants (SSIM). This idea is different from the traditional suggestion that strain fields developed by dislocation produced TWME. With prolonged isothermal ageing time, the bainitic tronsforma-tion product α1 precipitated, the amount of γ-phase increased, while the martensite was retained and became less ondered. These factors all reduced TWME. During age-ing, the stacking faults in bainitic product α1 disappeared, which indicated that the bainitic product α1 is a sub-equilibrium phase. The interfaces of α-plates also lost straightness step by step, some plates twisted, bronched and overlapped. Its formation is irreversible in tnorphology and reduces the quantities of martensite. Although the precipitation of r may stabilize some martensite or oppose its growth,α may hinder nucleation of martensite. Thus, it was considered that α-plates were the worst de- stroyed element. These suggestions agreed well with our performance test results in that the transformation temperntures and the amount of TWME changed in the same way with prolonged ageing, firstly increasing and then decreasing after reaching an optimal maximum value.

关键词： precipitate stabilization TWME TEM and HREM

Preparation of giant unilamellar CdTe quantum dot vesicles and their metabolic pathway in vivo

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Science china Chemistry 2010年第8期53卷 1718-1722页

作者： WANG XianXiang1,3,YANG ZhongKe2.SAN Zhi1,PEN Xi2.& HUANG QianMing1 1College of Biology and Science,{2. Agricultural university,Ya’an 62.014,{2. 2.ollege of Veterinary Medicine,{2. Agricultural university,Ya’an 62.014,{2. 3College of Chemistry,{2. university,chengdu 610041,{2. 1. College of Biology and Science Sichuan Agricultural University Ya’an 625014 China3. College of Chemistry Sichuan University Chengdu 610041 China2. College of Veterinary Medicine Sichuan Agricultural University Ya’an 625014 China

Glutathione (GSH) capped CdTe quantum dots (QDs) with photoluminescence quantum yields of 61% and the maximum emitting at 601.2.nm were prepared in water *** unilamellar CdTe quantum dot vesicles (GUVs-CdTe),with diameters larger than 1.5 μm,were obtained using lower-pressure evaporation techniques with soybean *** with other QD liposomes,the entrapment efficiency of GUVs-CdTe for QDs has been significantly improved to 86.3%.After GUVs-CdTe were injected into mice through the tail vein,the fluorescence microscopy of tissue sections showed that GUVs-CdTe could not pass through the blood-brain barrier and air-blood barrier,which were removed mostly by the reticuloendothelial system and were widely distributed in the spleen and the *** behavior is the same as the character of the metabolic pathway of giant unilamellar vesicles by intravenous injections in mice.

关键词： quantum dots giant unilamellar quantum dot vesicles metabolic pathway

Semantic theory of finite lattice-valued propositional logic

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Science china(Information Sciences) 2010年第10期53卷 2022-2031页

作者： PAN XiaoDong 1,2.& XU Yang 2.1 School of Maths, Southwest Jiaotong {2., chengdu 610031,{2. 2.Intelligent Control Development Center, Southwest Jiaotong {2., chengdu 610031,{2. 1. School of Maths Southwest Jiaotong University Chengdu 610031 China2. Intelligent Control Development Center Southwest Jiaotong University Chengdu 610031 China

Based on the methodology of Pavelka’s fuzzy propositional logic, in this paper, by combining L-fuzzy set and classical two-value propositional logic theory, a kind of graded semantic theory in lattice-valued propositional logic based on finite lattice implication algebras is established. The notions of L-tautology and L-contradiction are introduced, and several theorems about the relations among different kinds of L-tautologies are given. From the viewpoint of uncertainty reasoning, the notion of satisfiability with certain level for a set of formulas is also defined. On this basis, the semantic consequence operation concerning a set of formulas is proposed, and the properties of semantic consequence operation and the consistency of fuzzy information are discussed.

关键词： lattice-valued propositional logic semantic theory L-tautology consistency lattice implication algebra

Response of remotely sensed Normalized Difference Water Deviation Index to the 2.06 Drought of eastern sichuan Basin

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Science china Earth Sciences 2008年第5期51卷 748-758页

作者： ZHANG WenJiang1, LU QiFeng2. GAO ZhiQiang3 & PENG Jian4 1 School of Water Resource and Hydropower, sichuan university,{2.,{2. 2.National Satellite Meteorological Center,{2. Meteorological Administration, Beijing 100081,{2. 3 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101,{2. 4 School of Environmental Sciences, Peking university, Beijing 100871,{2. 1. School of Water Resource and Hydropower Sichuan University Chengdu 610065 China 2. National Statellite Meteorological Center China Meteorological Administration Beijing 100081 China 3. Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China 4. School of Environmental Sciences Peking University Beijing 100871 China

One of the most serious droughts in last century occurred in eastern sichuan Basin in the summer of 2.06 (hereinafter called the Drought). The response of Moderate Resolution Imaging Spectroradiometer (MODIS, boarding on NASA satellites of Terra and Aqua) to the Drought was analyzed in order to reach one practicable monitoring solution for regional soil moisture. Temporal process and spatial extension of the Drought were firstly estimated with ground meteorological and hydrological observations. Then, for the whole region of sichuan and Chongqing, the remotely sensed Normalized Difference Water In- dex (NDWI) for the summers of 2.01―2.06 were calculated based on 8-day composite MODIS products, which were further used to construct a new water index (Normalized Difference Water Deviation Index, NDWDI) to examine the sensitivity of remote sensing in the Drought. The study showed that the NDWDI is more sensitive to regional drought than other absolute-soil-moisture-based indices. With the new index, the study extracted the spatial-temporal characteristics of the 2.06 Drought, and explored its developing and withdrawing processes, which agreed with related statistics. Compared with ground method of drought observation, the NDWDI-based remote sensing solution of this paper is more pref- erable and practicable in that the local soil properties of water consumption and supply are implicitly taken into account, and the spatial representativity limit of ground observation is circumvented to a degree as satellite remotely senses the earth surface in a way of two-dimensional pixel matrix. So, the NDWDI-based method can be used to monitor regional soil water stress situation more practically and efficiently.

关键词： sichuan Basin drought Normalized Difference Water Deviation Index response of remote sensing regional scale

Some basic inequalities in higher dimensional non-Euclid space

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Science china Mathematics 2007年第3期50卷 423-438页

作者： Ding-hua YANG College of Mathematics and Software Sciences, sichuan Normal university, {{2. 610066, china {{2. Institute of Computer Applications, Chinese Academy of Sciences, {{2. 610041, china College of Mathematics and Software Sciences Sichuan Normal UniversityChengdu 610066 China

In this paper, the concept of a finite mass-points system ΣN(H(A))(N > n) being in a sphere in an n-dimensional hyperbolic space H n and a finite mass-points system ΣN(S(A))(N > n) being in a hyperplane in an n-dimensional spherical space S n is introduced, then, the rank of the Cayley-Menger matrix-ΛN(H) (or a-ΛN(S)) of the finite mass-points system ΣN(S(A)) (or ΣN(S(A))) in an n-dimensional hyperbolic space H n (or spherical space S n) is no more than n + 2.when ΣN(H(A))(N > n) (or ΣN(S(A))(N > n)) are in a sphere (or hyperplane). On the one hand, the Yang-Zhang’s inequalities, the Neuberg-Pedoe’s inequalities and the inequality of the metric addition in an n-dimensional hyperbolic space H n and in an n-dimensional spherical space S n are established by the method of characteristic roots. These are basic inequalities in hyperbolic geometry and spherical geometry. On the other hand, some relative problems and conjectures are brought.

关键词： higher dimensional Euclid space simplex volume radius of circumscribed sphere metric addition Yang-Zhang’s inequality Neuberg-Pedoe’s inequality 51K05

A novel steady-state productivity equation for horizontal wells in bottom water drive gas reservoirs

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Petroleum Science 2011年第1期8卷 63-69页

作者： Zhang Liehui Zhao Yulong Liu Zhibin State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu Sichuan 610500China School of Science Southwest Petroleum UniversityChengduSichuan 610500China

It is known that there is a discrepancy between field data and the results predicted from the previous equations derived by simplifying three-dimensional（3-D） flow into two-dimensions（2.D）.This paper presents a new steady-state productivity equation for horizontal wells in bottom water drive gas ***,the fundamental solution to the 3-D steady-state Laplace equation is derived with the philosophy of source and the Green function for a horizontal well located at the center of the laterally infinite gas ***,using the fundamental solution and the Simpson integral formula,the average pseudo-pressure equation and the steady-state productivity equation are achieved for the horizontal *** case-studies are given in the paper,the results calculated from the newly-derived formula are very close to the numerical simulation performed with the Canadian software CMG and the real production data,indicating that the new formula can be used to predict the steady-state productivity of such horizontal gas wells.

关键词： Horizontal well point-source function bottom water driver gas reservoir steady-state productivity