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Application of Equilibrium Partitioning Approach to the Derivation of Sediment Quality Guidelines for Metals in Dianchi Lake

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Pedosphere 2007年第3期17卷 284-294页

作者： CHEN Yun-Zeng YANG Hao ZHANG Zhen-Ke QIN Ming-Zhou JIN Feng LU Jun-Jie Institute of Resources and Environment Henan University Kaifeng 475001 （China） State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of SciencesNanjing 210008 （China） College of Geography Nanjing Normal University Nanjing 210097 （China） Key Laboratory of Coast and Island Development of MOE Nanjing University Nanjing 210093 （China）

For the past 20 years, numerous studies have been carried out on the application of equilibrium partitioning approach （EqPA） for the derivation of sediment quality guidelines （SQGs）. However, for metals, few Equilibrium-partitioning- based numerical SQGs have been developed or are currently available because of the confounding factors mediating the bioavailability of metals. A study was conducted at Dianchi Lake, which is a heavily eutrophicated lake on the Yunnan- Guizhou Plateau, china with the focus on the measurement of partitioning coefficient （Kp） and SQGs derivation and normalization to acid volatile sulfide （AVS）, fine material, and organic carbon. Using new normalization methods, SQGs were formulated for seven metals including copper, zinc, lead, cadmium, chromium, mercury, and arsenic in Dianchi Lake. In Dianchi Lake sediments, the fine material contributed 25.4.-36.0% to the SQG values, with the largest contribution to the SQG value of mercury; AVS contributed 2.9%-75.0% to the SQG values, with the largest contribution to the SQG value of cadmium. This indicated that the fine material and the AVS were the most important controlling factors to the bioavailability of mercury and caximium, respectively. The contribution of total organic carbon （TOC） to the SQG values of copper and leaxi was 3.8% and 7.1%, respectively, indicating that at relatively lower concentrations, the contribution of TOC was not significant. In addition to normalization methods, appropriate procedures for the application of EqPA including sample collection, storage, and analysis are also essential to improve the reliability of SQGs. The normalized Dianchi Lake SQGs were higher than most of the empirically based SQGs developed in North America, but lower than Hong Kong interim SQGs except for cadmium and arsenic. The differences could be attributed to the approaches used for derivation of SQGs and the water quality criteria adopted and the differences in the physical and {4. charac

关键词： acid volatile sulfide fine material normalization method organic carbon sediment quality guidelines

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Research progress in muscle-derived stem cells Literature retrieval results based on international database

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Neural Regeneration Research 2012年第10期7卷 784-791页

作者： Li Zhang, Wei Wang Jinzhou Clinical College of Liaoning Medical university Jinzhou Central Hospital, Jinzhou 121000, Liaoning Province, china Jinzhou Clinical College of Liaoning Medical university Jinzhou Central Hospital Jinzhou 121000 Liaoning Province China.

OBJECTIVE： To identify global research trends of muscle-derived stem cells （MDSCs） using a bibliometric analysis of the Web of Science, Research Portfolio Online Reporting Tools of the National Institutes of Health （NIH）, and the Clinical Trials registry database （***）. DATA RETRIEVAL： We performed a bibliometric analysis of data retrievals for MDSCs from 2002 to 2011 using the Web of Science, NIH, and ***. SELECTION CRITERIA： Inclusion criteria：（1） Web of Science：（a） peer-reviewed articles on MDSCs that were published and indexed in the Web of Science. （b） Type of articles： original research articles, reviews, meeting abstracts, proceedings papers, book chapters, editorial material and news items. （c） Year of publication： 2002-2011. （d） Citation databases： Science Citation Index-Expanded （SCI-E）, 1899-present; Conference Proceedings Citation Index-Science （CPCI-S）, 1991-present; Book Citation Index-Science （BKCI-S）, 2005-present. （2） NIH：（a） Projects on MDSCs supported by the NIH. （b） Fiscal year： 1988-present. （3） ***： All clinical trials relating to MDSCs were searched in this database. Exclusion criteria：（1） Web of Science：（a） Articles that required manual searching or telephone access. （b） We excluded documents that were not published in the public domain. （c） We excluded a number of corrected papers from the total number of articles. （d） We excluded articles from the following databases： Social sciences Citation Index （SSCI）, 1898-present; Arts ＆ Humanities Citation Index （A＆HCI）, 1975-present; Conference Proceedings Citation Index - Social Science ＆ Humanities （CPCI-SSH）, 1991-present; Book Citation Index - Social sciences ＆ Humanities （BKCI-SSH）, 2005-present; Current chemical Reactions （CCR-EXPANDED）, 1985-present; Index Chemicus （IC）, 1993-present. （2） NIH：（a） We excluded publications related to MDSCs that were supported by the NIH. （b） We limited the keyword search to studies that included MDSCs within th

关键词： stem cells muscle-derived regeneration Web of Science NIH Clinical Trials bibliometric

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Magnesium as Biodegradable Implant material

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特种铸造及有色合金 2008年第S1期28卷 213-215页

作者： Wang Hao1,2 Shi Zhiming2 Yang Ke3 (1.faculty of engineering and Surveying, university of Southern Queensland2.School of engineering, The university of Queensland3.Institute of Metal Research, Chinese Academy of sciences)

Drawbacks associated with permanent metallic implants lead to the search for degradable metallic biomaterials. Magnesium alloys have been highly considered as Mg has a high biocorrosion potential and is essential to bodies. In this study, corrosion behaviour of pure magnesium and magnesium alloy AZ31 in both static and dynamic physiological conditions (Hank's solution) has been investigated. It is found that the materials degrade fast at beginning, then stabilize after 5 days of immersion. High purity in the materials reduces the corrosion rate while the dynamic condition accelerates the degradation process. In order to slow down the degradation process to meet the requirement for their bio-applications, an anodized coating is applied and is proved as effective in controlling the biodegradation rate.

关键词： Biodegradable materials biomaterials magnesium alloys biocorrosion behaviour.

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Eu^(2+)掺杂浓度对Ca_2MgSi_2O_7∶Eu^(2+)荧光粉发光特性的影响

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物理学报 2011年第12期60卷 569-574页

作者：曹仕秀韩涛涂铭旌重庆文理学院材料交叉学科研究中心重庆402168

采用化学共沉淀法制备了Ca2-xMgSi2O7:xEu2+绿色荧光粉.用X射线衍射仪、荧光分光光度计及光色综合测试系统对Ca2-xMgSi2O7:xEu2+绿色荧光粉的相结构、发光性能进行了测试.结果表明:其激发光谱分布在300—4.0nm波长范围,谱峰位于389,4.0n... 详细信息

采用化学共沉淀法制备了Ca2-xMgSi2O7:xEu2+绿色荧光粉.用X射线衍射仪、荧光分光光度计及光色综合测试系统对Ca2-xMgSi2O7:xEu2+绿色荧光粉的相结构、发光性能进行了测试.结果表明:其激发光谱分布在300—4.0nm波长范围,谱峰位于389,4.0nm处,可以被InGaN管芯产生的360—4.0nm辐射有效激发;在波长为4.0nm蓝光激发下,其发射光谱谱峰位于531nm处.Ca2-xMgSi2O7:xEu2+绿色荧光粉的发光强度随Eu2+掺杂量的增加而增强,当Eu2+掺杂量x为0.04.,发光强度达到最大值,而后开始降低,发生浓度猝灭.根据Dexter能量共振理论,浓度猝灭是由电偶极-电偶极相互作用引起的.

关键词： Ca2MgSi2O7:Eu2+ 绿色荧光粉发光特性白光发光二极管

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Preparation of Arsenic Trioxide Albumin Microspheres and its Release Characteristics in Vitro

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Journal of Huazhong university of Science and Technology(Medical sciences) 2005年第3期25卷 310-312,319页

作者：周洁曾甫清高翔谢蜀生魏树礼 Department of Urology Union Hospital Tongji Medical College Huazhong University of Science and Technology Laboratory of Immunopharmacology Health Science Center Peking University faculty of Pharmacy Health Science Center Peking University

Arsenic trioxide albumin microspheres (As_2O_3-BSA-NS) were prepared by using methods of chemical cross-linking. The desirability function (DF), calculated according to the size (0.05). The release experiment in vitro showed that As_2O_3 in As_2O_3-BSA-NS was released more slower than pure As_2O_3. It was concluded that regular As_2O_3-BSA-NS may be prepared by the methods of chemical cross-linking, which was optimized by orthogonal experimental analysis of different factors, and the microspheres can release As_2O_3 slowly.

关键词： Arsenic trioxide Albumin microspheres chemical cross-linking slow release

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用称重法研究聚丙烯腈树脂的凝固过程

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新型炭材料 2004年第1期19卷 16-20页

作者：吕永根杨常玲翟磊李永红吕春祥贺福凌立成东华大学材料科学与工程学院上海200051 东华大学化学与化工学院上海200051 中国科学院山西煤炭化学研究所炭材料重点实验室山西太原030001

　将聚丙烯腈二甲亚砜纺丝液在试管中于二甲亚砜水溶液中成型并凝固,通过计量凝固样品重量随时间的变化来考察在不同凝固浴条件下的凝固速率,并观察了凝固样品的横断面形貌。结果表明:凝固样品重量的变化可以直观地反应不同凝固浴条件... 详细信息

　将聚丙烯腈二甲亚砜纺丝液在试管中于二甲亚砜水溶液中成型并凝固,通过计量凝固样品重量随时间的变化来考察在不同凝固浴条件下的凝固速率,并观察了凝固样品的横断面形貌。结果表明:凝固样品重量的变化可以直观地反应不同凝固浴条件下聚丙烯腈二甲亚砜(DMSO) 水体系凝固速率的变化。随凝固浴浓度的提高,凝固速度减小,样品横截面趋于均匀化、致密化;凝固温度从30℃升高到50℃,凝固速度加快,截面由非圆形变为圆形,但在80℃下凝固速度反而下降;凝固浴中第三组份的添加降低了扩散速度,但会引起孔洞的产生。

关键词：称重法聚丙烯腈树脂凝固过程聚丙烯腈纤维聚丙烯腈二甲亚砜纺丝液时间凝固速率

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EXPERIMENTAL-NUMERICAL AND MICROSTRUCTURAL CONTROL OF HOT STRIP ROLLING

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Acta Metallurgica Sinica(English Letters) 2000年第1期13卷 369-378页

作者： R. Turk M. Knap and R. Robic (Department of materials and Metallurgy, faculty of Natural sciences and engineering, {4. of Ljubljana, Askerceva 12, Ljubljana 1000, SI, Slovenia)

On a local level, thermomechanical states during the passing of hot metallic material through the de- formation volume in a process of plane rolling with smooth rools were analysed by an experimental-nu- merical method. These states,which are markedly inhomogeneous in the length as well as in the height of the deformation zone,were taken as the basis for physical simulation of rolling the material at a certain lavel(i. e. stream line) of the deformation *** influences on local yield stresses and on the development of the microstructure were *** efficiency of physical simulation of rolling with the Gleeble 1500 simulating equipment was *** states at which the transport of metallic material through the deformation zone between smooth rolls takes place were analysed by a visioplastic method,while physical simulation of rolling was made by thermomechanically controlled cylindrical compression *** tests were made with industrially manufactrued X5Grni8.9 austenitic stainless steel.

关键词： there omechanical state deformation,shiulation austanitic stainless steal

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Effects of collagen types II and X on the kinetics of crystallization of calcium phosphate in biomineralization

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Progress in Natural Science:materials International 2002年第1期 19-21页

作者： GUO Yuan, HUANG Jian, XU Shanjin and WANG Kui(Department of chemical Biology, School of Pharmaceutical sciences, Peking university, Beijing 100083, china) Department of chemical Biology School of Pharmaceutical Sciences Peking University Beijing 100083China

The effects of the components of cartilages matrix on the process of endochondral ossification and the kinetics of crystal growth of calcium phosphate have been studied in the presence of type II or X collagen. During the experiments, type I collagen was added as the seed material. FT-IR analysis shows that calcium phosphate crystallized on the surface of type I collagen was mainly hydroxyapatite. Both type II and X collagens could reduce the growth rate of calcium phosphate crystals, and the effect of type X collagen is more obvious. The reaction was in the fourth order in the presence of type II collagen. The results showed that type II or X collagen had the ability to make Ca2+ accumulate in the process of endochondral ossification, but has little effect on crystal growth and the product of biomineraliza-tion.

关键词： type II collagen type X collagen biomineralization kinetics.

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Activated carbon fibers for water treatment

Activated carbon fibers for water treatment

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中日环境产业与环境经营研讨会

作者： Zeng Hanmin Chen Shuixiamaterials Science Institute School of Chemistry & chemical engineering Zhongshan university Guangzhou 510275 {4.

＜正＞The widespread scarcity, gradual destruction and aggravated pollution of water resources along with the progressive encroachment of incompatible activities have led to a range of water crises across the globe. Additionally, global climate change and atmospheric pollution could also have an impact on water resources and their availability. A conservative estimate of the number of

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TWO NEW STEROIDAL ALKALOIDS FROM BULBS OF FRITILLARIA LICHUANENSIS

TWO NEW STEROIDAL ALKALOIDS FROM BULBS OF FRITILLARIA LICHUA...

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第八届全国中药和天然药物学术研讨会与第五届全国药用植物和植物药学学术研讨会

作者： Hui-Fang Pi, Han-Li Ruan, Yong-Hui Zhang, Ji-Zhou Wu (faculty of Pharmaceutical sciences, Tongji Medical College of Huazhong university of Science and Technology, wuhan 4.0030,{4.)

Two new steroidal alkaloids lichuanine (1) and lichuanisinine (2) were isolated from the bulbs of Fritillaria Lichuanensis P. Li et C.P. Yang. Their structures were determined to be (205, 25R)-5□.. 14.□-cevanine-3□, 6D-diol (1) and (205, 25S)-5□, 14.D-cevanine-3□, 6□-diol-N-Oxide (2) by means of spectral analysis and chemical evidence.

关键词： Fritillaria Lichuanensis Liliaceae Steroidal alkaloid Lichuanine Lichuanisinine

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