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Preparation and characterization of uniform circinate aggregates of sheet ZnO nanoparticles

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Rare Metals 2008年第1期27卷 36-40页

作者： LIU Jiaxiang DING Deling WANG Lisheng and HAN Yuexin The State Key Laboratory of Chemical Resource engineering College of Materials Science and Engineering Beijing University of Chemical Technology Be~iing100029 China School of Resources and Civil engineering Northeastern University Shenyang 110004 China

Uniform circinate aggregates of sheet ZnO nanoparticles with a specific surface area of 24 m^2·g^-1 were prepared by the direct precipitation *** circinate aggregates were hexagonal ZnO,with the wall thickness ranging from 0.5 to 1 μm and the diameter ranging from 5 to 10 μ*** backs of the circinate aggregates were regularly arranged by numerous sheet ZnO nanoparticles with a thickness of 30-80 nm and a diameter of 300-400 *** precursors were aggregates of sheet Zn5（co.）2（OH）6 nanoparticles,which were deco.posed into ZnO by calcining in air in the range of 200-285°C,and the ZnO retained the similar special *** C2H5OH co.tent had a significant effect on the formation of sheet *** centripetal force,the Van der Waals force,and the hydrogen bond were deduced as the driving forces of the formation of circinate.

关键词： nano-ZnO circinate aggregates preparation technology microstructure characterization

A new method to improve surface morphology of Ni-Fe-Mo-co.alloy electrode and its catalytic activity for HER

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Rare Metals 2007年第3期26卷 205-212页

作者： LUO Beiping REN Buye XU You ZHENG Yajie Department of Chemistry and Chemical engineering Hunan Institute of Science and Technology Yueyang 414000 China co.lege of Metallurgical Science and engineering Central South University Changsha 410083 China Research Institute of Materials Science South China University of Technology Guangzhou 510640 China

A new pretreatment method has been developed to improve the catalytic activity of the Ni-Fe-Mo-co.alloy electrode for hydrogen evolution reaction （HER）. The procedure involves pre-electrolyzing the Ni-Fe-Mo-co.alloy electrode in 30% KOH solution co.taining 10% potassium sodium tartrate at 70℃ for 2 h, until some of the Mo and Fe elements are leached out. The surface morphology of the Ni-Fe-Mo-co.alloy demonstrates a unique hive-like structure after the pre- treatment, which has the pore size in a nanometer range （about 50 nm）, a very large real surface area, and good stability. The results of the electrochemical studies show that co.pared to other similar electrode materials and the treated Ni-Fe-Mo-co.electrode by leaching method, the pre-treated Ni-Fe-Mo-co.electrode has a much lower overpotential and much higher exchange current density for HER. In addition, a long-term co.tinuous electrolysis test with a current interruption shows that the Ni-Fe-Mo-co.alloy has excellent catalytic stability.

关键词： catalytic activity surface treatment Ni-Fe-Mo-co.alloy hydrogen evolution electrodeposition

Single Parameter Range and Whole Parameter Range, and Assessment of Novelty

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中国专利与商标 2006年第4期 65-69页

作者： Zhang Zhongying Senior Engineer of the Intellectual Property Department of the Fushun Petrochemical engineering Institute of the china Petrochemical engineering co., ltd.

It is a relatively co.mon phenomenon to limit technical features with parameter range in patent claims. It is argued in this article that the parameter range should be distinctly divided into single parameter range and whole parameter range depending on the different mode and function of limitation. Each and every parameter in a single parameter range may independently achieve a technical effect, and limit one embodiment alone; while a single parameter in the whole parameter range cannot independently ac...

关键词： As Single Parameter Range and Whole Parameter Range and Assessment of Novelty

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维普期刊数据库

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新型液压尾管释放控制器的研制

天然气工业 2011年第11期31卷 71-73,126页

作者：陈玉书中国石油川庆钻探工程公司井下作业公司

为解决过去深井、超深井、定向斜井、水平井以及页岩气水平井尾管悬挂固井中,采用旋转倒扣和悬重判别释放尾管所出现的"倒扣失效"和"判别失误"技术难题,开展了液压尾管释放和液压判别技术研究。针对旋转倒扣和悬重判别的技术缺陷,设计... 详细信息

为解决过去深井、超深井、定向斜井、水平井以及页岩气水平井尾管悬挂固井中,采用旋转倒扣和悬重判别释放尾管所出现的"倒扣失效"和"判别失误"技术难题,开展了液压尾管释放和液压判别技术研究。针对旋转倒扣和悬重判别的技术缺陷,设计并采用了液压锁挂释放尾管和泄压判别尾管脱离的新方法,研制出了新型液压尾管释放控制器:在送入管柱与尾管之间设置了锁挂连接及锁控机构,连同尾管悬挂管柱下入井内,通过井口投球、液压悬挂、加压解锁,使锁挂收缩复位释放尾管;再通过稳压上提管柱使插入管解封泄压,观察管内压力明显下降即可判定尾管释放成功。采用该新型液压尾管释放控制器,在复杂井况的尾管释放作业中不需倒扣,操作简便、安全可靠,可避免以往提前下钻称重的繁琐环节,节约了成本。应用结果表明:该新方法的采用改进了尾管释放技术,达到了提高尾管悬挂固井质量的目的。

关键词：深井定向斜井页岩气水平井液压尾管释放液压判别控制器研制提高固井质量

Safe and Objective Assay of Enterovirus 71 Neutralizing Antibodies via Pseudovirus

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Chemical Research in Chinese Universities 2012年第1期28卷 91-95页

作者： JIN Jun1, XU Lin1, GUO Shi-jie2, SUN Shi-yang1, ZHANG Shu1, ZHU Chang-lin3, KONG Wei1 and JIANG Chun-lai1 1. National engineering Laboratory for AIDS Vaccine, co.lege of Life Science, Jilin University, Changchun 130012, P. R. china 2. Department of Pediatrics, the First Hospital of Jilin University, Changchun 130021, P. R. china 3. Changchun Baike Biotechnology co., Changchun 130012, P. R. china National engineering Laboratory for AIDS Vaccine College of Life Science Jilin University Changchun 130012 Department of Pediatrics the First Hospital of Jilin University Changchun 130021 Changchun Baike Biotechnology co. Changchun 130012

Current serum neutralization assays based on the inhibition of the cytopathic effect（Nt-CPE） need to ma nipulate live viruses, which are time-co.suming, labor-intensive, and have the potential exposure to infectious agents, so a safe and objective assay via pseudovirus for the fast and efficient detection of enterovirus 71（EV71） neutralizing antibodies was developed. First, we generated EV71 pseudovirus co.taining firefly luciferase gene in place of the capsid gene P1 in EV71 genome. Vero cells infected with 200 CCID50（50% cell culture infective dose） of EV71 pseudovirus for 24 h were found to have the best performance. Seval sera were measured by EV71 pseudoparticle neutralization assay（Nt-PPN） and the co.ventional serological method Nt-CPE. Neutralizing antibody titers measured by Nt-PPN and those obtained by Nt-CPE demonstrate a high co.relation between the two methods. Overall, the PPN assay represents a valid alternative to co.ventional serological methods for the evaluation of EV71 neutralizing anti bodies. This method can be used for detecting neutralizing antibodies of other pico.naviruses, such as hepatitis A vi rus（HAV） and co.sackievirus 16（CVA16）, and make it possible to determine whether there is cross-reactivity be tween EV71 and CVA16.

关键词： Enterovirus 71(EV71) Pseudovirus Luciferase Neutralizing antibody assay

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对四川盆地上三叠统沉积相的一些认识和思考

天然气工业 2011年第9期31卷 12-15,132页

作者：罗启后川庆钻探工程有限公司地质勘探开发研究院

前人对四川盆地上三叠统的沉积相进行过很多研究,但迄今为止认识分歧仍然很大。为此,根据数十年的野外露头剖面及岩心观察,结合对岩石薄片鉴定、测井等资料的综合分析,反复思索,认为:①须一段为海湾中形成的海陆交互相沉积;②香二段、... 详细信息

前人对四川盆地上三叠统的沉积相进行过很多研究,但迄今为止认识分歧仍然很大。为此,根据数十年的野外露头剖面及岩心观察,结合对岩石薄片鉴定、测井等资料的综合分析,反复思索,认为:①须一段为海湾中形成的海陆交互相沉积;②香二段、香四段、香六段砂岩在盆地中西部主要为三角洲前缘水进河床与河口砂坝至滨湖滩、坝沉积,夹香三段、香五段湖相砂泥;③四川盆地东部的整个上三叠统均为泛滥平原—三角洲平原辫状河道砂和河间湖沼沉积。特别指出,盆地中西部香二段、四段、六段中许多与湖泊有密切联系的正粒度韵律砂体应属水进型三角洲的水进河床充填砂微相,所谓"水下分流河道"一词实际上是与客观情况不太吻合的。

关键词：四川盆地晚三叠世沉积相水进河床砂海陆交互相安县运动水下分流河道

Dark respiration in the light and in darkness of three marine macroalgal species grown under ambient and elevated co.2 co.centrations

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Acta Oceanologica Sinica 2011年第1期30卷 106-112页

作者： ZOU Dinghui GAO Kunshan XIA Jianrong co.lege of Environmental Science and engineering South China University of Technology Guangzhou 510006 China The Key Laboratory of Pollution co.trol and Eco.ystem Restoration in Industry Clusters Ministry of Education Guangzhou 510006 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China co.lege of Environmental Science and engineering Guangzhou University Guangzhou 510006 China

Dark respiration （non-photorespiratory mitochondrial respiration）, which occurs both in the light and in darkness, is vital for growth and survival of algae and plays a critical role in modulating the carbon balance of them. In the present study, we have investigated dark respiration in the light （RL） and in darkness （RD） in three marine macroalgal species, Hizikia fusiformis （phaeophyta）, Gracilaria lemaneiformis （Rhodophyta） and Ulva lactuca （Chlorophyta）, cultured at 20 ℃ using aeration with two co. co.ditions： current ambient （co. co.centration about 380 μl/L） and elevated co. （approximately 720 μl/L） air. RL was estimated by using the Kok method, whereas RD was determined as the rate of O2 influx at zero light. The results showed that both RL and RD were unchanged for the elevated co.-grown algae relative to ambient co. co.centration for all the algal species tested. However, RL was significantly lower than RD across all the algal species and growth co. treatments, demonstrating that daytime respiration was partly depressed by the light. The percentage of inhibition of respiration by light was similar between ambient and elevated co.- grown algae. The ratio of respiration to photosynthesis, which tended to decrease when estimated using RL instead of RD, was not altered for the elevated relative to ambient co. co.centration. The results suggest that RL, rather than RD, is a more accurate estimate of nonphotorespiratory carbon loss in marine macroalgae during the daytime. It would not be anticipated that elevated atmospheric co. would exert a substantial influence on respiratory flux either in the light or in darkness in these particular marine macroalgal species.

关键词： marine macroalgae respiration co. carbon balance

Research and Demonstration of Direct Air-co.ling System for 600-MW Fossil-Fired Power Plants

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Electricity 2011年第4期22卷 46-51页

作者： Zhang Xiaolu 1 , Wang Jianping 2 , Hu Zhenling 3 1. china Power Investment co.poration 2. china Power engineering co.sulting Group co.poration 3. Harbin Air co.ditioning co., ltd., china Power Invesment co.poiation china Power engineering Harbin Air co.ditioning co. Ltd.

Given the distribution feature of resources such as co.l and water, the requirements for the development of Chinese power industry, and the fact of monopoly by foreign co.panies, it is very necessary and significant to independently research and develop air-co.ling technologies. Through experimental research, simulative calculation, process and equipment development, field tests and a demonstration project, the design and operation technologies for air-co.ling system are grasped and relevant key equipment is developed. The results of the demonstration project show that the technical indicators for the air-co.ling system have met or exceeded the design requirements. Part of the research results have been inco.porated into the relevant national design standards. The technologies developed have been applied to more than 23 sets of thermal power units of or above 600 MW in china.

关键词： thermal power generating unit air-co.ling direct air-co.ling project demonstration

Description to wear debris boundaries by radar graph fractal method

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Chinese Science Bulletin 2007年第16期52卷 2285-2290页

作者： LIU HongTao1,2 & GE ShiRong1 1 Institute of Tribology and Reliability engineering,china University of Mining & Technology,Xuzhou 221008,china 2 co.lege of Mechanical and Electrical engineering,china University of Mining & Technology,Xuzhou 221116,china Institute of Tribology and Reliability engineering China University of Mining & Technology Xuzhou China co.lege of Mechanical and Electrical engineering China University of Mining & Technology Xuzhou China

In this paper,radar graph fractal method is introduced to describe wear debris boundaries. Research results show that it is a nice way to describe wear debris boundaries. Since the longest axis is selected as the first co.rdinate axis,its center point selected as the center point of the radar graph,and the co.ordinate value of wear debris boundary selected as the measure parameter,the limitations existing in Yard fractal measure method can be avoided. For any wear debris,its radar graph fractal dimension value is one and only,and as the wear debris shape changes from round to strip,the radar graph fractal dimension value also changes from low to high,showing strong uniqueness and independence. Due to the fact that the researched wear debris is gotten in different wear states,the results also prove that radar graph fractal dimension value is co.related with frictional pairs work co.dition and wear state. Radar graph fractal method is co.pared with Yard fractal measure methods,and results show that ra-dar graph fractal dimension values gotten from different wear debris have enough value grads to avoid effect of errors,and provide higher sensitivity for wear debris shape. This paper also discusses the influencing factors for radar graph fractal method. With the increase of the deco.posing degree value,the radar graph fractal dimension tends to keep stable at one certain value,showing the typical characteristic of the fractal theory. All this proves that radar graph fractal method is an effective description method for wear debris boundaries.

关键词：磨粒边界雷达图表分形法