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1METAMORPHIC MECHANISMSAND THEIR CONFIGURATION MODELS显示文摘The concept of metamorphic mechanisms is presented, configuration models and configuration transformations relating to a set of new matrix operations are discussed and proposed. The configuration of a metamorphic mechanism reflects the connectivity change in the mechanism during motions which results in mobility change and presents the characteristics of the mechanism which is discussed in various applications particularly in decorative artifacts. The characteristics is further investigated with mobility analysis.Dai Jiansheng (Department of Mechanical Engineering, School of Physical Sciences and Engineering, King’s College, University of London,Strand,London WC2R 2LS, United kingdom) Zhang Qixian (Robotics Research Institute,Beijing University of Aeronautics and 2000Chinese Journal of Mechanical Engineering2000,13,3:61
2Intracellular compartmentation of CTP synthase in Drosophila显示文摘Compartmentation is essential for the localization of biological processes within a eukaryotic cell.ATP synthase localizes to organelles such as mitochondria and chloroplasts.By contrast,little is known about the subcellular distribution of CTP synthase,the critical enzyme in the production of CTP,a high-energy molecule similar to ATP.Here I describe the identification of a novel intracellular structure con-taining CTP synthase,termed the cytoophidium,in Drosophila cells.I find that cytoophidia are present in all major cell types in the ovary and exist in a wide range of tissues such as brain,gut,trachea,testis,accessory gland,salivary gland and lymph gland.In addition,I find CTP synthase-containing cytoophidia in other fruit fly species.The observation of compartmentation of CTP synthase now permits a broad range of questions to be addressed concerning not only the structure and function of cytoophidia but also the organization and regulation of CTP synthesis.Ji-Long Liu Medical Research Council Functional Genomics Unit,Department of Physiology,Anatomy and Genetics,University of Oxford,Oxford,OX1 3QX,United Kingdom 2010Journal of Genetics and Genomics2010,37,5:16
3Pharmacokinetics of radioimmunotherapeutic agent of direct labeling mAb ^(188)Re-HAb18显示文摘AIM: To labed Anti-hepatoma monoclonal antibody (mAb)fragment HAb18 F (ab')2 was labeled with 188 Re for thepharmacokinetic model of 188 Re-HAb18 F (ab')2 and toevaluate its pharmacokinetic parameters in hepatoma-bearing nude mice.METHODS: HAb18 F(ab')2 was directly labeled with 188Reusing 2-mercaptoethanol (2-ME) as reducing agents.Labeling efficiency and immunoreactivity of 188 Re-HAb18 F( ab')2 were evaluated by Whatman 3MM paperchromatography and live cell assay, respectively.Biodiatribution analysis was also conducted in nude micebearing human hepatoma in which animals were sacrificed atdifferent time points(1, 4, 18, 24 and 24h) after 188Re-HAb18F(ab' )2 was injected through tail-vein into hepatoma-bearingnude mice. The blood and radioactivity of organs and masswere measured. The concentrations of 188 Re-HAb18 F(ab')2were evaluated with a pharmacokinetic 3P97 software.RESULTS: The optimum labeling efficiency andimmunoreactive fraction were 91.7% and 0.78%,respectively. The parameters of 188Re-HAb18 F(ab')2 were:T1/2, 2.29h; Vd, 1.49 × 10-9L@ Bq- 1; AUC, 20.49 × 109Bq@ h@L-1 ;CL, 0.45 × 10-3L@ h- 1. 188Re- HAb18 F(ab')2 could locatespecially in hepatoma with high selective reactivity of HAb18F(ab')2. 188 Re-HAb18 F(ab')2 was mainly eliminated bykidney. The maximal tumor to blood ratio was at 48h, andmaximal tumor to liver ratio was at 18h.CONCLUTION: The pharmacokinetics of 188Re-HAb18 F(ab')2fit a I-compartment model. 188 Re-HAb18 F(ab')2 can beuptaken selectively at the hepatoma site.Chao Lou Zhi-Nan Chen Hui-Jie Bian Department of Cell Engineering Research Centre,Jie Li,Department of Oral Cell Biology,Qingdu Hospital,Fourth Military Medical University,Xi’an 710033,Shaanxi Province,China Shou-Bo Zhou School of Biological Sciences,University of Manchester,Oxford Road,United Kingdom 2002World Journal of Gastroenterology2002,8,1:14
4Valuing water quality in China:purpose,approach and policy显示文摘The economic valuation of water quality in a rapidly developing country such as China should be undertaken to determine when the benefits from rapid growth begin to exceed the costs from the same. The best approach is to ascertain the total economic valuation of the environmental resource. This includes all of the various uses of the resource, and even those values that are unconnected to individual use (e.g. natural and aesthetic values). A method known as contingent valuation (CV) is used to ascertain these forms of value. This approach is demonstrated here in an application to river water quality in the Beijing area. A CV study is reported in which Beijing area citizens reported an average willingness to pay about 1.3% of annual income in order to prevent further deterioration of river water quality. Aggregation over the representative population indicates that the perceived cost of further river quality deterioration is in the neighbourhood of USD 60 million. Such a measure provides some indication of the socially desired “stopping point”—— in the pursuit of economic growth at the expense of environmental quality.Timothy Swanson,Brett Day,Susana Mourato Centre for Social and Economic Research on the Global Environment, Department of Economics, and School of Public Policy, University College London, Gower Street, London WC1E 6BT, United Kingdom 1999Journal of Environmental Sciences1999,11,3:12
5Optimization design study of low-Reynolds-number high-lift airfoils for the high-efficiency propeller of low-dynamic vehicles in stratosphere显示文摘Aerodynamic performance of low-Reynolds-number high-lift airfoil makes a great impact on designing a high-efficiency propeller for low-dynamic vehicles in stratosphere. At high altitude,low-Reynolds-number airfoils are supposed to have high lift-drag ratio or high endurance factor at cruising attack angle along with good stall characteristics. To design such a high-performance low-Reynolds-number high-lift airfoil,the paper established a hierarchical multi-objective optimization platform by combing direct search optimization algorithm EXTREM and airfoil flow field solver XFOIL to automatically and quickly calculate aerodynamic performance function of airfoil by computer. It provides an effective solution to multi-point design problem of low-speed low-Reynolds-number airfoil. It can be seen from the results of three typical optimization examples,the new airfoil E387_OPT2,FX63-137_OPT2 and S1223_OPT2 based on hot low-Reynolds-number high-lift airfoils (Eppler 387 airfoil,Wortmann FX63-137 airfoil and S1223 airfoil) can meet the optimization design requirements and have very good aerodynamic characteristics in both design state and non-design state. Thus,the applicability and effectiveness of hierarchical multi-objective optimization platform are verified.MA Rong1, ZHONG BoWen2 & LIU PeiQing1 1 Key Laboratory of Fluid Mechanics, Ministry of Education, Institute of Fluid Mechanics, School of Aeronautical Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China 2 Department of Aerospace Science, School of Engineering, Cranfield University, MK43 0AL, United Kingdom 2010Science China(Technological Sciences)2010,53,10:7
6Morphological variation in fossil crayfish of the Jehol biota,Liaoning Province,China and its texonomic discrimination显示文摘Twelve morphological characteristics in 61 fossil crayfish specimens, which came from the Upper Jurassic Yixian Formation, are discussed respectively in the present paper. A study of these new and better preserved materials allows us to add to and revise the original description for Family Cricoidoscelosidae. In our collection, no modifications of the second pleopod of the males have yet been noted. This would be a crucial factor for the diagnosis of the family. Based on the presence of annulus ventralis in both Cricoidoscelosus and Palaeocambarus, they would appear to be very closely allied to those characteristics of the Family Cambaridae. In regard to the family Protastacidae, we seriously doubt it is actually crayfish, in light of the lack of any apomorphies identifiable within the Astacida, and their marine habitat.SHEN Yanbin, Frederick R. Schram & Rod S. Taylor Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing 210008, China Zoological Museum, University of Amsterdam, P. O. Box 94766, 1090 GT Amsterdam, The Netherlands Department of Earth Sciences, Cambridge University, Cambridge CB2 3EQ, United Kingdom 2001Chinese Science Bulletin2001,46,1:6
7树胶分泌物的非食品应用显示文摘本文列举了最常用的树胶分泌物的主要用途。它们是阿拉伯胶树生产的阿拉伯胶;亚洲黄芪生产的黄芪胶;刺苹婆生产的刺苹婆胶和由车轴木生产的印度胶。列举的用途涉及到药物、化妆品、纺织、印刷以及其它非食品工业等技术领域。Wang Weiping(A.Branwell & Co.Ltd.,58-62 High Street,Epping,CM164AE,United Kingdom)D.M.W.Anderson(Chemistry Department,University of Edinburgh,EH9 3JJ,United Kingdom) 1994林产化学与工业1994,14,3:5
8INTEGRABILITY VIA INVARIANT ALGEBRAIC CURVES FOR PLANAR POLYNOMIALDIFFERENTIAL SYSTEMS显示文摘We present an introduction to the Darboux integrability theory of planar complex and real polynomial differential systems containing some improvements to the classical theory.Colin Christopher (School of Mathematics and Statistics, University of Plymouth, Plymouth, Devon PL4 SAA, UNITED KINGDOM) Jaume Llibre (Dopartament de Matematiques, Universitat Autonoma de Barcelona, 08193-Bellaterra, Barcelona, SPAIN) 2000Annals of Differential Equations2000,16,1:4
9Circulating galectin-3 in the bloodstream:An emerging promoter of cancer metastasis显示文摘Increased concentrations of free circulating galectin-3 are commonly seen in the blood circulation of patients with many types of cancers including colorectal cancer.Recent studies have shown that changes in circulating galectin-3 levels in cancer patients may contribute significantly to the metastatic spread of disseminating cancer cells by enhancing their ability to adhere to blood vessel endothelium and by helping their avoidance of immune surveillance.Thus,targeting the galectin-3 actions in the circulation may hold significant promise for future development of novel therapeutic agents to prevent metastasis and reduce cancer-associated fatality.Lu-Gang Yu,The Henry Wellcome Laboratory of Molecular and Cellular Gastroenterology,Division of Gastroenterology,School of Clinical Sciences and Liverpool Centre for Glycobiology,University of Liverpool,Liverpool L69 3GE,United Kingdom 2010World Journal of Gastrointestinal Oncology2010,2,4:3
10Divergent trophoblast invasion and apoptosis in placental bed spiral arteries from pregnancies complicated by maternal anemia and early-onset preeclampsia/intrauterine growth restriction显示文摘Mamed Kadyrov John C.P. Kingdom Berthold Huppertz 2006American Journal of Obstetrics and Gynecology2006,,2:2
11Treatment options in fetomaternal hemorrhage:four case studies显示文摘Weisberg L Kingdom J Keating S 2004J Obstet Gynaecol Can2004,26,:1
12Apoptosis in the trophoblastrole of apoptosis in placental morphogenesis显示文摘HUPPERTZ B KINGDOM JC 2004J Soc Gynecol Investig2004,11,6:1
13Divergent trophoblast invasion and apoptosis in placental bed spiral arteries from pregnancies cnmplicared by maternal anemia and early - onset preeclampsia/intrauterine growth restriction 显示文摘Kadyrov M Kingdom JC Huppertz B 2006Am J Obstet Cynecol2006,194,2:1
14Postpar-tum assessment of the renin angiotensin system in women with previous severe, early-onset preeclampsia显示文摘Hladunewich MA Kingdom J Odutayo A 2011J Clin Endocrinol Metab2011,96,11:1
15Endovascular versus open repair of abdominal aortic aneurysm显示文摘United Kingdom EVAR Trial Investigators Greenhalgh RM Brown LC 0,,20:1
16Inactivation of HTLV-Ⅲ/LAV during preparation of immunoglobulin显示文摘 Kingdom H Apfeizweig R 1986Transfusion1986,26,4:1
17Animal models of preeclampsia; uses and limitations显示文摘Mccarthy FP Kingdom JC Kenny LC 2011Placenta2011,32,6:1
18Relative efficacy of randomly allocated diet,sulphonylurea,insulin,ormetformin in patients with newly diagnosed NIDDM followed for three years显示文摘 1995BMJ1995,310,:1
19Plancental pathology in obstetrics:adaptation of failure of the villous tree?显示文摘KINGDOM J 1998Plancenta1998,,19:1
20Efficacy of atenolol and captopril in reducing risk of macrovascular and microvascular complications in type 2 diabetes:UKPDS 39显示文摘United Kingdom Prospective Diabetes Study Group 1998BM J1998,317,:1
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