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Synthesis,characterization,structures and magnetic property of chiral oxalate-bridged dicopper(Ⅱ) complexes

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Science china Chemistry 2010年第6期53卷 1255-1260页

作者： WU Ling1,WANG Jun2,ZHU CaiFei1,LIN YiJi1,CHEN LeiQi1,FAN Jun2 & ZHANG Hui1 1State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry,College of Chemistry and chemical engineering,Xiamen university,Xiamen 361005,china 2school of Chemistry and environment,South china Normal university,Guangzhou 510006,china 1. State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China2. School of Chemistry and Environment South China Normal University Guangzhou 510006 China

The oxalato-bridged dicopper(II) complexes [Cu2(μ-ox)(LRR)2(H2O)2(ClO4)2] (1),[Cu2(μ-ox)(LRR)2(CH3COCH3)2(ClO4)2](1a),[Cu2(μ-ox)(LSS)2(H2O)2(ClO4)2] (2) and [Cu2(μ-ox)(LRR)(LSS)2(CH3COCH3)2(ClO4)2] (3) [LRR = (8R,10R)-(-)-[4,5]-pineno2,2′-bipyridine,LSS = (8S,10S)-(+)-[4,5]-pineno-2,2′-bipyridine;ox2= oxalate] were first prepared.A possible mechanism for the formation of the chial dicopper(II) complexes was *** on elemental analysis,conductance measurement,UV-Vis spectra,CD spectra and X-ray single-crystal diffraction,the oxalato-bridged structures of 1 and 2 were deduced to adopt two Cu(II) ions and the bridged oxalate lying in the nearly same *** crystal structures of 1a and 3 reveal that the coordination geometry around each Cu(II) ion is an elongated and distorted octahedron and two axial solvent molecules and two perchlorate ions are anti to each other respectively in both binuclear *** solution CD spectra of 1 and 2 in the visible d-d range show very weak Cotton effects with peaks at 588 and 779 nm,which are approximately of mirror image,suggesting the optical activities may be derived from the vicinal effects of the chiragenic centers at the pinene group of LRR and LSS,*** 1 has been characterized by variable-temperature magnetic susceptibility and the data was least-square fitted to the Blenaey-Bowers *** exchange integral J was found to be -338.41(4) cm-1,indicating a strong antiferromagnetic interaction between two copper(II) ions.

关键词： dicopper(II) complex chiral bipyridine μ-oxalate bridge crystal structure CD spectroscopy magnetic property

Risk Control of Liquid Chlorine Leak in Wastewater Treatment Plant Based on QRA

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Risk Control of Liquid Chlorine Leak in Wastewater Treatment...

Structure and Pozzolanic Activity of Calcined Coal Gangue during the Process of Mechanical Activation

2010(沈阳)国际安全科学与技术学术研讨会

作者： ZHANG Sheng-zhu~1,WU Zong-zhi~2,KANG Rong-xue~2,SANG Hai-quan~2,GU Hai-bo~2,LIU Ning~3 (1.Faculty of Resources and Safety engineering,china university of mining and technology(beijing),beijing 100083.china 2.china Academy of Safety Science and technology,beijing 100012,china 3.Civil and environment engineering school,university of Science and technology beijing 100083.china)

＜正＞The bulk storage of liquid chlorine meets the need of disinfection but also poses a considerable risk to the residents *** on the risk analysis of chlorine leak,and through the study of chlorine leak mode,leak source strength and the consequences of accidents,the model of accident consequences of chlorine leak was *** was analyzed by quantitative method and the acceptable standards of individual and social risk were *** quantitative risk calculations are performed in a wastewater treatment plant,and the individual risk contour and social risk curve are *** respect of the high-risk areas,risk control measures are proposed.

关键词： wastewater treatment plant chlorine leak quantitative risk assessment risk control

来源： cnki会议评论

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Journal of Wuhan university of technology(Materials Science) 2009年第2期24卷 326-329页

作者：郭伟 Department of Material engineering Yancheng Institute of Technology Institute of Material Science and engineering Nanjing University of Technology

On the basis of analyzing coal gangue＇s chemical and mineral compositions, the structure change of coal gangue during the mechanical activation was investigated by XRD, FTIR, NMR, and the mechanical strength of the cement doped coal gangue with various specific surface area was tested. The experimental results indicate that, the lattice structure of metakaolin in coal gangue samples calcined at 700 ℃ disorganizes gradually and becomes disordered, and the lattice structure of α-quartz is distorted slightly. The pozzolanic activity of the coal gangue increases obviously with its structural disorganization.

关键词： coal gangue mechanical activation structure NMR tetrahedron

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反渗透技术用于高矿化度矿井水处理的研究

水处理技术 2009年第10期35卷 82-85页

作者：杨慧敏何绪文何咏中国矿业大学化学与环境工程学院北京100083

采用反渗透技术对高矿化度矿井水进行处理,考察了CPA(芳香族聚酰胺)膜对矿井水中各种离子的去除效果。试验结果表明:系统运行24d,对矿井水的处理效果显著,Ca2+、Cl-、SO42-、Mg2+各离子的平均去除率可分别达到98%、94%、98%、95%以上,... 详细信息

采用反渗透技术对高矿化度矿井水进行处理,考察了CPA(芳香族聚酰胺)膜对矿井水中各种离子的去除效果。试验结果表明:系统运行24d,对矿井水的处理效果显著,Ca2+、Cl-、SO42-、Mg2+各离子的平均去除率可分别达到98%、94%、98%、95%以上,系统出水水质稳定,出水达到国家饮用水标准;并根据静态清洗反渗透(RO)污染膜的分析结果,总结出反渗透膜的污染特征,最终优选出先碱洗后酸洗的膜清洗方案。

关键词：反渗透矿井水高矿化度反渗透膜

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植物对硅的吸收转运机制研究进展

生物化学与生物物理进展 2011年第5期38卷 400-407页

作者：张玉秀刘金光柴团耀金玲中国矿业大学(北京)化学与环境工程学院北京100083 中国科学院研究生院生命科学学院北京100049

硅(Si)能缓解生物与非生物胁迫对植物的毒害作用,Si的吸收转运是由Si转运蛋白介导的.最近,多个Si转运蛋白(Lsi)基因相继在水稻、大麦和玉米中被克隆出来,并在Si的吸收转运机制方面取得了很大进展.水稻OsLsi在根组织中呈极性分布,OsLsi1... 详细信息

硅(Si)能缓解生物与非生物胁迫对植物的毒害作用,Si的吸收转运是由Si转运蛋白介导的.最近,多个Si转运蛋白(Lsi)基因相继在水稻、大麦和玉米中被克隆出来,并在Si的吸收转运机制方面取得了很大进展.水稻OsLsi在根组织中呈极性分布,OsLsi1定位在根外皮层和内皮层凯氏带细胞外侧质膜,负责将外部溶液中的单硅酸转运到皮层细胞内.OsLsi2定位在凯氏带细胞内侧质膜,在外皮层中负责将Si输出到通气组织质外体中,在内皮层与OsLsi1协同作用将Si转运到中柱中.导管中的Si通过蒸腾流转运到地上部,再由定位在叶鞘和叶片木质部薄壁细胞靠近导管一侧的OsLsi6负责木质部Si的卸载和分配.在大麦和玉米中,ZmLsi1/HvLsi1定位在根表皮和皮层细胞外侧质膜负责Si的吸收,然后Si通过共质体途径被转运到内皮层凯氏带细胞中,再由ZmLsi2/HvLsi2输出转运到中柱中.ZmLsi6在细胞中的定位和活性与OsLsi6相似,推测其可能具有类似的功能,但大麦Lsi6至今未见报道.所以,Si转运机制仍需要进一步研究.

关键词：硅转运蛋白机制

Structure of cis-[Pt(NH_(3))(2-picoline)]^(2+)and DNA adduct and its bonding characteristics

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Science china Chemistry 2004年第1期47卷 67-74页

作者： JIA Muxin, LIU Kai, YANG Zuoyin & CHEN GuangjuDepartment of Chemistry, beijing Normal university, beijing 100875, china beijing General Research Institute of mining and Metullargy, beijing 100044, china 1. Department of Chemistry Beijing Normal University 100875 Beijing China 2. beijing General Research Institute of mining and Metullargy 100044 Beijing China

Several methods including molecular mechanics, molecular dynamics, ONIOM that combines quantum chemistry with molecular mechanics and standard quantum chemistry are used to study the configuration and electron structures of an adduct of the DNA segment d(ATACATG*G*TACATA)·d(TATGTACCATGTAT) with cis-[Pt(NH3)(2-Picoline)]2+. The investigation shows that the configuration optimized by ONIOM is similar to that determined by NMR. Strong chemical bonds between Pt of the complex and two N7s of neighboring guanines in the DNA duplex and hydrogen bond between the NH3 of the complex and O6 of a nearby guanine have a large impact on the configuration of the adduct. chemical bonds, the aforementioned hydrogen bond, and the interaction between a methyl of the complex and a methyl of the base in close proximity are critical for the complex to specifically recognize DNA.

关键词： cis-[PtCl2(NH3)(2-Pic)], DNA segment, ONIOM, molecular mechanics, molecular dynamics.

The solid lubricating material experiment device for Shenzhou-7 Spaceship

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Science china(Technological Sciences) 2010年第9期53卷 2521-2527页

作者： WANG Ke1,2,REN WeiJia1,WANG ShiDa1 & WENG LiJun3 1 Academy of Opto-Electronics,Chinese Academy of Sciences,beijing 100190,china 2 Graduate university of Chinese Academy of Sciences,beijing 100049,china 3 Lanzhou Institute of chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,china 1. Academy of Opto-Electronics Chinese Academy of Sciences Beijing 100190 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

A solid lubricating material exposure experiment in space is one of the missions during the seventh manned spaceflight of china,and the key is to develop a device which can be fixed reliably outside of the orbital module and can be fetched conveniently by an astronaut during space *** solid lubricating material experiment device needs to be locked reliably in a vibrating and impacting environment during the launch phase,and should meet the requirement that it can be unlocked and fetched reliably by the astronaut wearing an extravehicular spacesuit via simple operations in orbit in an environment of high and low *** for the device we developed,the environmental characteristic of the mission was analyzed,the mechanical analysis and thermal analysis were carried out,and then a mechanism with functions of mechanical locking,structural self-locking and manual unlocking was *** device was verified by a sequence of experiments and was fetched by the astronaut during the flight of the Shenzhou-7 Spaceship.

关键词： manned spaceflight exposure experiment mechanism unlock

Copper-Ti_3SiC_2 composite powder prepared by electroless plating under ultrasonic environment

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Rare Metals 2007年第4期26卷 359-364页

作者： ZHANG Zhongbao XU Shaofan school of Materials Science and engineering Hefei University of Technology Hefei 230009 China

In this article, a new type of Cu-Ti3SiC2 composite powder prepared using the electroless plating technique was introduced. The initial Ti3SiC2 particles are 11 μm in diameter on an average. The Cu plating was carried out at middle temperature （62-65℃） with the application of ultrasonic agitation. The copper deposition rate was determined by measuring the weight gain of the powder after plating. It has been found that the pretreatment of Ti3SiC2 powder is very important to obtain copper nanoparticles on the surface of Ti3SiC2 The optimum procedure before plating aimed to add activated sites and the adjustment of the traditional composition of the electroless copper plating bath could decelerate the copper deposition rate to 0.8 gm/h. X-ray diffraction （XRD） indicates that the chemical composition of the plating layer is copper. SEM images show that the surface of the Ti3SiC2 particles is successfully coated with continuous copper layer. The wetting property between the copper matrix and Ti3SiC2 can be improved so as to increase the interfacial strength.

关键词： composites electroless plating Ti3SiC2 ultrasonic interfacial strength

Terrain classification based on adaptive weights with airborne LiDAR data for mining area

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中国有色金属学会会刊：英文版 2011年第S3期21卷 648-653页

作者： LI Hui-ying1, WANG Zhi2, SUN Ya-feng1, LI Wen-hui1 1. College of Computer Science and technology, Jilin university, Changchun 130012, china 2. College of Resources and Civil engineering, Northeastern university, Shenyang 110004, china [a] College of Computer Science and technology Jilin University Changchun 130012 China [b] College of Resources and Civil engineering Northeastern University Shenyang 110004 China

The fast high-efficiency inspection for mining subsidence of mine area is a reliable way for forecasting accident and evaluating losing expense. In order to monitor mining subsidence of exploitation mine efficiently, LiDAR data were used and a novel strip division method was brought forward based on separating-treatment theory, which divided the mass of discrete three-dimensional point cloud data into a series of parallel strips and reduced the dimension in each strip. Polynomial fitting algorithm based on the adaptive weights, which located in the range of the strip, was used for classification complex terrain data of mine-area. The results show that LiDAR datamation can be greatly reduced. In the mean time, the time spending for calculation is shortened, and computational complexity is simplified. Therefore, high-efficiency terrain classification of LiDAR point cloud method can be great beneficial to monitoring environment of mine area.

关键词： mining subsidence airborne LiDAR strip division adaptive weights