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乙烯基酯树脂低温特性研究

全面腐蚀控制 2013年第7期27卷 42-44,55页

作者：江先龙顾浩钱永嘉杨华周国友张明

本文研究了乙烯基酯树脂玻璃钢材料在低温环境下的拉伸强度、拉伸断裂延伸率、弯曲强度、平均线膨胀系数、导热率、耐温循环等性能,对乙烯基酯树脂在长期低温及低温频繁交变场合的应用,具有一定的理论指导作用。

关键词：乙烯基酯树脂玻璃钢低温性能线性膨胀系数

Au@Ag@Pt core–shell nanorods regulating Ag release behavior endow titanium antibacterial activity and biocompatibility

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Rare Metals 2022年第2期41卷 630-638页

作者： jia-Jun Qiu Ting-Ting Yang Yi-Fan Li Wen-Hao qian Xuan-yong Liu School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of Sciences School of Materials Science and Engineering Jiamusi University Smart Materials and Surfaces Laboratory Faculty of Engineering and EnvironmentNorthumbria University Shanghai Xuhui District Dental Center

Although titanium and its alloys are extensively used in orthopedics and dentistry fields,implant failures still happen because of implant-associated ***,Au@Ag@Pt core–shell nanorods with noble metal combination were fabricated and assembled on medical titanium surface and the antibacterial activity and biocompatibility were *** results showed that antibacterial rates of Ti–Au@Ag@Pt against *** and *** were 89.7%and 92.7%,***,Ti–Au@Ag@Pt showed no obvious cell toxicity with MC3 T3-E1 cells grew well on the sample *** was discovered that the Pt shell layer on Ti–Au@Ag@Pt slowed down the Ag ion release rate which endowed medical titanium surface with both antibacterial activity and good biocompatibility.

关键词： Titanium Silver Nanorod Antibacterial Biocompatibility

New Dimeric Selenidoarsenate(III):Solvothermal Synthesis and Crystal Structure of [Co(en)_3]_2As_2Se_5

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Chinese Journal of Structural Chemistry 2006年第9期25卷 1110-1114页

作者： jia Ding-Xian ZHAO qian-Xin SONG Li-Feng ZHANG yong DAI Jie Department of Chemistry and Chemical Engineering Suzhou University Suzhou 215006 China

A new selenidoarsenate [Co（en）3]2As2Se5 1 （en = ethylenediamine） was synthesized by a reaction of AsCI3, CoCl2-6H2O and Se in en under mild solvothermal conditions, and the structure was determined by single-crystal X-ray diffraction. 1 crystallizes in the orthorhombic system, space group Pbca with a = 15.5092（12）, b = 11.5756（9）, c = 17.8138（14） A, V = 3198.1（4） A^3, Mr= 1023.12, Z = 4, D, = 2.125 g/cm^3,μ = 8.807 mm^-1, F（000） = 1976, S = 1.171, the final R = 0.0591 and wR = 0.1067 for 3170 observed reflections with 1 〉 2σ（I）. 1 consists of isolated dimeric [As2Se5]^4- anion constructed by two corner-sharing AsSe3 trigonal pyramids and transition metal [Co（en）3]^2＋ cations. The optical absorption property and thermal stability of 1 are reported.

关键词： solvothermal synthesis crystal structure selenidoarsenate ethylenediamine

The in vitro and in vivo toxicity of gold nanoparticles

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Chinese Chemical Letters 2017年第4期28卷 691-702页

作者： Yan-Peng jia Bu-Yun Ma Xia-Wei Wei Zhi-yong qian State Key Laboratory of Biotherapy Collaborative Innovation Center of Biotherapy West China Hospital Sichuan University Chengdu 610041 China Department of Ultrasound West China Hospital Sichuan University Chengdu 610041 China

Gold nanoparticles,owing to their unique physicochemical and optical properties,well-established synthetic methods and easy modifications,have been widely used in biomedical ***,for their safe and efficient applications,much attention has been given to the toxicological evaluations of gold nanoparticles in biological systems.A large number of studies focusing on this problem have been carried out during the past ***,the researches on gold nanoparticles toxicity still remain fragmentary and even contradictory with each *** may be caused by the variety in experimental *** this review,we aim to provide a better understanding about the in vitro and in vivo toxicity of gold nanoparticles by reviewing and describing the up to date literatures related to this problem and we mainly focused on these properties such as the particle size and shape,the surface charge and ***,we also summarized the adverse effect of gold nanoparticles on immune systems and analyzed the origin of the toxicity.

关键词： Gold nanoparticles Toxicity Size Shape Surface modification In vitro In vivo

NON-LCL AND TRACER TEST FOR GROUNDWATER FLOW IN A SINGLE FRACTURE

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Journal of Hydrodynamics 2006年第1期18卷 104-108页

作者： qian jia-zhong LIU yong WANG jian-hua GUAN Hou-chun CHEN Shi-jun WANG jia-quan School of Resources and Environmental Engineering Hefei University of Technology Hefei 230009China School of Biotechnology and Food Engineering Hefei University of Technology Hefei 230009 China

The validity of Local Cubic Law （LCL） is an important issue to study groundwater flow and transport in fractured media. According to laboratory simulaion tests, the average velocity with a lower gradient in a single fracture is calculated by the LCL, which is compared with the measured average velocity. Then dye tracer test is designed and completed. The evidence for non-LCL, is drawn from the results of the simulation tests and the dye tracer tests. Then the Reynolds number of groundwater is calculated, the critical value of Re for laminar flow is discussed in a single fracture under different conditions. The motion types for groundwater flow have been discussed.

关键词： non-Local Cubic Law (LCL) tracer test,groundwater flow in a single fracture

Rh doping effect on coking resistance of Ni/SBA-15 catalysts in dry reforming of methane

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Chinese Chemical Letters 2014年第11期25卷 1411-1415页

作者： Wen-jia Cai Lin-Ping qian Bin Yue He-yong He Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Collaborative Innovation Center of Chemistry for Energy Materials Fudan University

A series of SBA-15 supported bimetallic Rh–Ni catalysts with different weight ratio of Rh/Ni in the range of 0–0.04 were prepared for carbon dioxide reforming of methane. The doping effect of Rh on catalytic activity as well as carbon accumulation and removal over the catalysts was studied. The characterization results indicated that the addition of a small amount of Rh promoted the reducibility of Ni particles and decreased the Ni particle size. During the dry reforming reaction, the carbon deposition was originated from CH4 decomposition and CO disproportionation. The Rh–Ni catalyst with small metallic particle size inhibited the carbon formation and exhibited high efficiency in the removal of coke. In comparison with bare Ni-based catalyst, the Rh–Ni bimetallic catalysts showed high activity and stability in the dry reforming of methane.

关键词： Methane reforming Carbon dioxide Rh–Ni/SBA-15 Carbon deposition

Tree species classification in an extensive forest area using airborne hyperspectral data under varying light conditions

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Journal of Forestry Research 2023年第5期34卷 1359-1377页

作者： Wen jia yong Pang Institute of Forest Resource Information Techniques Chinese Academy of ForestryBeijing 100091People’s Republic of China Key Laboratory of Forestry Remote Sensing and Information System National Forestry and Grassland AdministrationBeijing 100091People’s Republic of China

Although airborne hyperspectral data with detailed spatial and spectral information has demonstrated significant potential for tree species classification,it has not been widely used over large areas.A comprehensive process based on multi-flightline airborne hyperspectral data is lacking over large,forested areas influenced by both the effects of bidirectional reflectance distribution function(BRDF)and cloud shadow *** this study,hyperspectral data were collected over the Mengjiagang Forest Farm in Northeast China in the summer of 2017 using the Chinese Academy of Forestry's LiDAR,CCD,and hyperspectral systems(CAF-LiCHy).After BRDF correction and cloud shadow detection processing,a tree species classification workflow was developed for sunlit and cloud-shaded forest areas with input features of minimum noise fraction reduced bands,spectral vegetation indices,and texture *** indicate that BRDF-corrected sunlit hyperspectral data can provide a stable and high classification accuracy based on representative training ***-shaded pixels also have good spectral separability for species *** red-edge spectral information and ratio-based spectral indices with high importance scores are recommended as input features for species classification under varying light *** to the classification accuracies through field survey data at multiple spatial scales,it was found that species classification within an extensive forest area using airborne hyperspectral data under various illuminations can be successfully carried out using the effective radiometric consistency process and feature selection strategy.

关键词： Tree species classification BRDF effects Cloud shadow Airborne hyperspectral data Random forest

A green and efficient access to aryl nitriles via an electrochemical anodic oxidation

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Chinese Chemical Letters 2014年第8期25卷 1112-1114页

作者： jia-qian Ye Zhen-Lei Zhang Zheng-Gen Zha Zhi-yong Wang Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Soft Matter Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology University of Science and Technology of China

The nitrile functionality is a key building block in synthetic chemistry, and has wide applications in pharmaceuticals. However, traditional methodologies for the synthesis of nitriles are limited to harsh reaction conditions. Herein, we report a new and efficient access to aryl nitriles by an electrochemical synthesis. Compared with the conventional synthetic methods, this electrochemical synthesis is more environmentally friendly and easier to handle.

关键词： Eletrochemistry Anodic oxidation Aryl nitrile

A Photometric Study of the W UMa-Type Contact Binary RZ Com

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Chinese Journal of Astronomy and Astrophysics 2008年第4期8卷 465-471页

作者： jia-jia He Sheng-Bang qian National Astronomical Observatories / Yunnan Observatory Chinese Academy of Sciences Kunming 650011 China United Laboratory of Optical Astronomy Chinese Academy of Sciences （ULOAC） Beijing 100012 China Graduate School of Chinese Academy of Sciences Beijing 100049 China

We present results of CCD photometric observations of the short-period W UMatype contact binary system, RZ Com. The light curve of the binary has changed from Wsubtype to A-subtype from 1998 to 2003, then back to W-subtype in 2004. An analysis was carried out using the 2003 version of the Wilson-Devinney code. It is confirmed that RZ Com is a low-degree, overcontact f = 20.1% （±7.4%） binary system with a high inclination of i = 81.°40 （＋0.°40）, and a mass ratio q = 2.351 （＋0.031）. Combining four newly determined times of light minimum with others in the literature, the variations in orbital period is examined. A small-amplitude oscillation （A=0.0065d）, with a period of 41.5 year, is discovered superimposed on a long-term increase at rate dP/dt = ＋3.97 × 10^-8d yr^-1. The period oscillation can be explained either by the light-time effect due to the presence of an unseen third body, or by cycles of magnetic activity on the components. Combining our photometric solution with the spectroscopic elements obtained by Mclean ＆ Hilditch, the absolute dimensions ofRZ Com are： M1 = 1.14 （±0.19）M⊙, M2 = 0.50 （±0.09）M⊙, R1 = 1.12 （±0.01）R⊙, R2 = 0.78 （＋0.01）R⊙ and A = 2.41 （±0.02）R⊙.

关键词： stars binaries close - stars binaries eclipsing - stars individual RZ Com