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Role of oxyR from Sinorhizobium meliloti in Regulating the Expression of Catalases

Acta Biochimica et Biophysica Sinica 2005年第6期37卷 421-428页

作者： Li EUO~(1.3. Ming-Sheng QI~(1.3. Shi-Yi YAO~2.Hai-Ping CHENG~2.Jia-Bi ZHU~1 Guan-Qiao YU~1 1 National Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences.Chinese Academy of Sciences, Shanghai 2.003.0} china 2.Biological Sciences Department, Lehman College, the City university of New York, Bronx, NY 10468. USA, 3.Graduate School of the Chinese Academy of Sciences, Shanghai 2.003.0} china NationalLaboratoryofPlantMolecularGenetics InstituteofPlantPhysiologyandEcologyShanghaiInstitutesforBiologi

The process of symbiotic nitrogen fixation results in the generation of reactive oxygen speciessuch as the superoxide anion（O2.）and hydrogen peroxide（H2.2..The response of rhizobia to these toxicoxygen species is an important factor in nodulation and nitrogen *** Sinorhizobium meliloti,oneoxyR homologue and three catalase genes,katA,katB,and katC were detected by sequence *** gene is located next to and divergently from katA on the *** investigate the possible rolesof oxyR in regulating the expression of catalases at the transcriptional level in ***,an insertion mutantof this gene was *** mutant was more sensitive and less adaptive to H2.2.han the wild typestrain,and total catalase/peroxidase activity was reduced approximately fourfold with the OxyR mutationrelative to *** activities of KatA and KatB and the expression of katA::lacZ and katB::lacZ promoterfusions were increased in the mutant strain compared with the parental strain grown in the absence of H2.2.indicating that katA and katB are repressed by ***,when exposed to H2.2.katA expressionwas also increased in both *** and Escherichia *** exposed to H2.2.OxyR is convertedfrom a reduced to an oxidized form in *** concluded that the reduced form of OxyR functions as arepressor of katA and katB ***,in the presence of H2.2.reduced OxyR is converted to theoxidized form of OxyR that then results in increased katA *** further showed that oxyR expressionis autoregulated via negative feedback.

关键词： Sinorhizobium meliloti OxyR catalase katA H2.2

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A STUDY OF DRAG COEFFICIENT RELATED WITH VEGETATION BASED ON THE FLUME EXPERIMENT

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Journal of Hydrodynamics 2010年第3期22卷 329-337页

作者： HUI Er-qing HU Xing-e JIANG Chun-bo MA Fang-kai ZHU Zhen-duo china Three Gorges Corporation Yichang 443002 China State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China

This study is focused on the effects of ecological factors （diameter and flexibility） and vegetation community composition on the drag coefficient related with vegetation. The single leafy shrub and three mixed communities （including shrub-grass, shrub-reed and reed-grass community） were studied. The flow velocity and water level were measured and used to calculate the drag coefficient based on the Bernoulli＇s equation, Darcy drag formula and the expression for the drag coefficient related with Darcy drag factor. The trend of the drag coefficient in the vertical direction was analyzed against flow depth, diameter, diameter P（eynolds number, flow depth Reynolds number and relative roughness height in different discharges. The results show that beside the dense leafy shrubs community, the vertical trend of the drag coefficient among other cases against flow depth, diameter, diameter Reynolds number, flow depth Reynolds number and relative roughness height can be approximately expressed by power law functions under different flow discharges. Moreover, in a mixed community with two plants with distinctly different ecological factors, the one with the most distinct variations of ecological factors determines the vertical trend of the drag coefficient; the other one only affects the magnitude of the drag coefficient. Furthermore, if the ecological factors of the vegetation in the vertical direction are kept almost not changed, the drag coefficient can be approximately regarded as a constant.

关键词： vegetated channel drag coefficient flume experiment

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Recent developments in crystallographic investigation of martensitic transformation

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Progress in Natural Science:Materials International 2004年第3期 1-8页

作者： GU Nanju 1, DONG Guixia 1,2. , LIN Xiaoping 1*, WANG Baoqi 1 and MA Xiaoli 1(1. Metal Material Institute, Hebei university of Technology, Tianjin 3.013.0} {3. 2. Department of Material Science and Engineering, Tianjin Institute of Technology, Tianjin 3.0191, {3.) MetalMaterialInstitute HebeiUniversityofTechnologyTianjin300132China DepartmentofMaterialScienceandEngineering TianjinInstituteofTechnologyTianjin300191China

The results and new knowledge obtained in recent years by using an atom force microscope (AFM) to investigate the surface relieves and to reveal the lattice deformation characteristics in martensitic transformation (MT) are summarized. All round analysis and research about crystallography and morphology of MT have been done based on our “displacement vector” theory. New viewpoints that the “invariant plane strain” criterion have no universality and that the large rotation of habit planes takes place in ｛557｝ lath and ｛2.5｝ plate martensites are put forward. Thereby, the formation mode of ｛557｝ martensite is established, which is in good agreement with the experimental results. Finally, according to the self accommodation principle between variants crystallographic calculations of twin and multi variant martensites in shape memory alloys have been carried out. The calculation method greatly simplifies the crystallographic calculation process of phenomenological theory. And the calculated results are in good agreement with experimental ones.

关键词： martensitic transformation crystallography phenomenological theory displacement vector invariant habit plane.

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DEVELOP RFID APPLICATION USING WEBSPHERE RFID SOLUTIONS

DEVELOP RFID APPLICATION USING WEBSPHERE RFID SOLUTIONS

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第八届分布式计算及其应用国际学术研讨会

作者： Xu JunWu 1 Liang JunLin 2.1. School of Computer Science&Technology Wuhan Institute of Technology 43.073.china 2. School of Automation Wuhan {3. of Technology 43.074 china

This article describes research in the use of The IBM Development Kit to develop a Radio frequency identification （RFID）application *** how to integrate the framework with back-end applications and implement business *** server allows business-logic integration of the information with back-end EAI systems of connecting disparate systems,such as Supply Chain Management（SCM）,Customer Relationship Management（CRM）and Enterprise Resource Planning（ERP）.

关键词： RFID IBM WebSphere Premises Server SOA ERP CRM SCM

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异步传输方式信元分段与重组的功能实现方法

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同济大学学报（自然科学版） 2001年第7期29卷 811-815页

作者：周其刚钟宏施鹏飞张树京上海交通大学图像处理与模式识别研究所上海200030 中兴通讯上海第一研究所上海200231 同济大学交通信息工程及控制研究所上海200331

研究一种异步传输方式 (ATM)交换模块信元分段与重组 (SAR)的功能实现方法 .AAL是ATM层和高层之间的适配层 ,其主要功能是把各类业务适配成ATM信元 .对于帧中继和以太网的数据业务进入ATM交换模块应以AAL5来适配 .

关键词：帧中继异步传输方式流量管理信元分段信元重组 AAL ATM适配层

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Electronic Structure Calculation for Co_6(μ_6-C)(μ_3.S)_2.CO)_(12. Cluster

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Chinese Chemical Letters 1997年第4期8卷 351-352页

作者： Wen LI Ye LIU Yuan Qi YIN( Lanzhou Institute of Chemical Physics, Academia Sinica)(research center of Analysis and Measurement, Fudan {2., Shanghai 2.043.) ACAD SINICA LANZHOU INST CHEM PHYSLANZHOUPEOPLES R CHINA FUDAN UNIV RES CTR ANAL & MEASUREMENTSHANGHAI 200433PEOPLES R CHINA

The electronic Structure ofCo6(μ_6-C)(μ_3.S)_2.CO)_(12. molecule has been calculated by DV-Xα method. The results show that the reaction mechanism of CS_2.and Co2.CO)8 in synthsis seems only to undergo the additive and decarbonyl processes. The other result worthy of being mentioned is the calculated atonmic charges that are Co0.3.,S1.2.+,μ6-Cl. 16-,C0.06- and O0.2.-.S atom has not only the positive charge but also four times as much as that of Co atom. This is not in accordance with the electronegativihes of 1.7 and 2.5 respectively for Co and S atom

关键词： Co CO Cluster

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Geochemical characteristics of Jurassic coal and significance for the evolution of the environment, Yanqi Basin, china

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Progress in Natural Science:Materials International 2006年第9期16卷 974-982页

作者： WU Chaodong , XU Youling, GUO Zhaojie1, QUAN Shujin, LI Yonglin and FENG Xue ( Key Laboratory of Orogenic Belts and Crustal Evolution of Department of Education, Peking university, Beijing 100871, china 3.d Geological Survey Brigade, Henan Bureau of Mineralogical and Resources, Xinyang 476000, china Exploration & Development {3. Institute of Henan Oilfield, SINOPEC, Nanyang 473.3.4} china) [a]Key Laboratory of Orogenic Belts and Crustal Evolution of Department of Education Peking University Beijing China [b]3.d Geological Survey Brigade Henan Bureau of Mineralogical and Resources Xinyang China [c]Exploration & Development research Institute of Henan Oilfield SINOPEC Nanyang China

The Mesozoic strata of the Yanqi Basin consists of coarse debris with coal beds, characterized by the developments of coal seams of the Jurassic sediments whose main petrologic contents are glutenite, fine sandstone, mudstone, carbonaceous shale and coal. Based on the analyses of the minerals, trace elements and REEs, we try to find geochemical characteristics of the coal seam formation process. The analysis results indicate that the contents of ash and sulfur are low while the content of phosphor is comparatively high, and that the specific value of Al2.3.SiO2.is relatively high and that of (Al2.3.+ SiO2./(Fe2.3.+ CaO+ MgO) is near 1. All these results indicate that the coal seams are formed in the relatively deep marsh, which is favorable for the evolvement of hydrocarbon at the diagenesis stage.

关键词： coal sedimentary geochemistry trace elements Jurassic.

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Adjustable character of microwave attenuation in BaTiO3.electrorheological fluids

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Progress in Natural Science:Materials International 2002年第10期 35-40页

作者： FAN Jijun, ZHAO Xiaopeng , HUANG Min, GUAN Litao and WEN Lishi(1. Institute of Electrorheological Technology, 141# Northwestern Polytechnical university, Xi'an710072. china 2. Institute of Metal {2., Chinese Academy of Sciences, Shenyang 110015, china) Institute of Electrorheological Technology 141# Northwestern Polytechnical University Xi'an 710072 China Institute of Metal research Chinese Academy of Sciences Shenyang 110015 China

The behavior of microwave attenuation in BaTiO3.electrorheological fluids is studied when considering microwave propagation in the directions perpendicular and parallel to the particle chains, respectively. In the former case, the microwave attenuation increases with field strength when the particle concentration is low, and the increase of the particle concentration can also increase the microwave attenuation. However, when the particle concentration exceeds a critical value, the attenuation will first increase then decrease with field strength. At the same time, the higher the field strength, the greater the change of microwave attenuation. Moreover, there is a saturation field strength. When the field strength is lower than the saturated one, the change of microwave attenuation is fast. On the other hand, in the case of microwave propagation parallel to the particle chains, the microwave attenuation increases with the field strength monotonously. In addition, the variation of microwave attenuation wi

关键词： electrorheological fluids BaTiO3 microwave attenuation relaxation effect.

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Simultaneous Analysis of Thirteen Bioactive Components in Evodia rutaecarpa and Its Varieties by HPLC-DAD-MS

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Chinese Herbal Medicines 2010年第2期2卷 112-117,131页

作者： XU Hai-yu1,3.ZHANG Tie-jun2.XIAO Xue-feng1,ZHAO Ping1,LIU Chang-xiao3.XU Jun2.1.Tianjin university of Traditional Chinese Medicine,Tianjin 3.0193.{3. 2.Tianjin Engineering Laboratory of Quality Control Techniques for TCM,Tianjin Institute of Pharmaceutical {2.,Tianjin 3.0193.{3. 3.The National Laboratory of Pharmacodynamics and Pharmacokinetics,Tianjin Institute of Pharmaceutical {2.,Tianjin 3.0193.{3. Tianjin university of Traditional Chinese Medicine Tianjin 300193China The National Laboratory of Pharmacodynamics and Pharmacokinetics Tianjin Institute of Pharmaceutical ResearchTianjin 300193China Tianjin Engineering Laboratory of Quality Control Techniques for TCM Tianjin Institute of Pharmaceutical ResearchTianjin 300193China Tianjin university of Traditional Chinese Medicine Tianjin 300193China The National Laboratory of Pharmacodynamics and Pharmacokinetics Tianjin Institute of Pharmaceutical ResearchTianjin 300193China

Objective To control the quality of Evodia rutaecarpa *** An HPLC-DAD-MS/MS method was established for the rapid and efficient identification of bioactive constituents and for simultaneous quantitative analysis of four bioactive ingredients including evodiamine,rutaecarpine,dehydroevodiamine,and evodin in ***,which was applied to evaluating eight samples of *** and its varieties from different *** Thirteen potentially bioactive constituents including one flavonoid glycoside,one limonin,four indoloquinazoline alkaloids,and seven quinolone alkaloids were identified in all samples and the contents of dehydroevodiamine,evodine,evodiamine,and rutaecarpine varied widely from 0.10% to 0.51%,0.49% to 3.12.,0.07% to 1.56%,and 0.10% to 0.69%,*** This method is found to be convenient,fast,accurate,and it is facilitated to improve the quality control standard of *** and related products.

关键词： dehydroevodiamine Evodia rutaecarpa evodiamine evodin HPLC-DAD-MS rutaecarpine

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The Study on Produce and Properties ofF-Heparin Surface Modified IOLs

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Chinese Journal of Biomedical Engineering(English Edition) 2003年第1期12卷 1-16页

作者： GU Han qing 1,YUAN Jia qin 2.SUN Hui min 2.ZHANG Hai wen 1,LU Mo gu 1,WANG Gui qin 3.GUO Hong yu 3.XU Yan shan 2.his work is funded in part by the National 10th Five Year Plan on Capture Key of Science and Technolog (2.01 BA706B17) 1 Tianjin Institute of Urological Surgery,Tianjin 3.02.1,china,2.Tianjin Medical university Eye {2.,Tianjin 3.0070,china 3.Tianjin Medical university,Tiangjin 3.0070,china

Objective:To study the biocompatibility of F heparin surface modified IOLs (F HSM IOLs) and provide theoretical and experimental basis for clinical use and new IOL development. Methods The technique of carrier energy ion beam combined with low temperature and low pressure plasma was used to modify the surface of PMMA IOLs. The physicochemical and optical properties of F HSM IOLs were examined. In vitro, the cultured cells adherence and growth on IOLs were studied. In vivo, F HSM IOLs were implanted into rabbits and Rhesus Monkeys eyes. The biocompatibility of F HSM IOLs, PMMA IOLs and HSM IOLs was compared. Results There were fewer adhered cells on the surface of F HSM IOLs with no toxicity to the cultured fibroblasts. F HSM IOLs caused less inflammatory reaction, broke BAB more slightly and decreased posterior capsular opacity. F HSM IOLs possessed better biocompatiblity. Our research also suggested that the brownish F HSM IOLs could prevent the short wave length light and ultraviolet rays from injuring the retina. Conclusion F HSM IOLs possessed better biocompatibility than conventional PMMA IOLs and can be used in clinical works after further inspection and approval.

关键词： F heparin surface modified IOLs Biocompatibility Preparation In vitro experiments In vivo experiments Rabbits Rhesus Monkeys

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