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1Friction of Alloys at High Temperature显示文摘A brief review is given about the friction and wear properties of high temperature alloys. Above a critical temperature, if the oxide becomes ductile, it will flow over the surface and prevent metal-to-metat contact. In order to study the tribology of oxide lubrication. a series of tests were carried out using Cu(ReO4)2 as a lubricant. The effects of time. Surface finish. substrates. load and temperature were investigated. A mechanism of lubrication is proposed in which the surface slip predominates along with mechanical attachment of oxide to the surface.M.B.Peterson (Wear Sciences, 925 Mallard Circle, Arnold Maryland 21012, USA)(To whom correspondence should be addressed)S.J.Calabrese (Rensselaer Polytechnic Institute, Troy, NY, USA)Shizhuo LI and Xiaoxia JIANG (Institute of Metal Research, Chinese Acad 1994Journal of Materials Science & Technology1994,10,5:11
2Human μ-opioid receptor overexpressed in Sf9 insect cells functionally coupled to endogenous G_(i/o) proteins显示文摘Human μ-opioid receptor (HμOR) with a tag of six consecutive histidines at its carboxyl terminus had been expressed in recombinant baculovirus infected Sf9 insect cells.The maximal binding capacity for the [3H] diprenorphine and [3H]ohmefentanyl (Ohm) were 9.1± 0.7 and 6.52±0.23 nmol/g protein, respectively. The [3H] diprenorphine or [3H] Ohm binding to the receptor expressed in Sf9 cells was strongly inhibited by μ-selective agonists [D-Ala2], N-methylPhe4, glyol5]enkephalin (DAGO), Ohm, and morphine, but neither by δ nor by K selective agonist. Na+ (100 mM) and GTP (50 μM) could reduce HμOR agonists etorphine and Ohm affinity binding to the overexpressed HμOR. μ-selective agonists DAGO and Ohm effectively stimulated [35S]GTPγS binding (EC50 = 2.7nM and 6.9 nM) and inhibited forskolin- stimulated cAMP accumulation (IC50 = 0.9 nM and 0.3 nM). The agonist-dependent effects could be blocked by opioid antagonist naloxone or by pretreatment of cells with pertussis toxin (PTX). These results demonstrated that HμOR overexpressed in Sf9 insect cells functionally coupled to endogenous Gi/o proteins.WEI QIANG DE HE ZHOU QING XIANG SHEN JIE CHEN LI WEI CHEN TIE LIN WANG GANG PEI ZHI QIANG CHI(e-mail:dhzhou@mail.shcnc.ac.cn)(1 Shanghai Institute of Materia Medica,2 Shanghai Institute of Cell Biology,Shanghai Academy of Life Sciences, Chinese Acad 2000Cell Research2000,10,2:3
3Tolerance evaluation of rice varieties to the brown planthopper,Nilaparvata lugens feeding显示文摘The brown planthopper, Nilaparvata lugens (Stal) (BPH) is one of the most important insect pests of rice in China and other east-southern Asian countries.CHEN Jianming YU Xiaoping LU Zhongxian ZHENC Xusong Xu Hongxing,Inst of Plant Protection,Zhejiang Acad of Agri Sci,Hangzhou 310021 CHENG Jia ’an,Dept of Plant Protection,Zhejiang Univ,Hangzhou 310029,China 2002Chinese Rice Research Newsletter2002,10,3:2
4The Blocking Effect of Phenolic Acid on N-Nitrosomorpholine Formation in vitro显示文摘Phenolic acids (PAs) are widely found in many daily consumed vegetables and fruits.The inhibitory effects of PAs on Nnitrosomorpholine (NMOR) formation in vitro undersimulated gastric juice condition were studied. The results showed that the inhibjtoryIX)tency of thirteen varieties of PAs differed greatly, which may be related to theirchemical structures; the blocking rate (BR) of different killds of PAs were as follows:caf feic acid, 92.5%; tannic acid, 90.0%; gallic acid, 86.8%; sinaPinic acid, 86.2%; ferulicacid, 8l.l%; chlorogenic acid, 69.4%; gentisic acid, 69.2%; syringic acid, 62.1%; protocatechuic acid, 56.0%; p-coumaric acid, 52.5%; vannilic acid, 35.4%; moreover,p-hydroxybenzoic acid and m-coumaric acid had the least blocking effect or even slightcatalyzing effect. The results also demonstrated that amounts of NMOR formed werenegatively correlated with molar ratio of PAs to nitrite and that the optimum pH forinhibition was between 2 and 3.LI PlNG WANG HUAI-ZHOU WANG XU-QING AND WU YONG-NING(Institute of Nutrition and Food Hygiene, Chinese Academy of PreventiveMedicine, 29 Nanwei Road, Beijing 100050, China)( Present address: Institute of Environmental Health and Engineering, Chinese Acad 1994Biomedical and Environmental Sciences1994,7,1:2
5ON THE EXISTENCE OF SOLUTIONS TO A TYPE OF NONLINEAR DIFFERENTIAL-ITERATIVE EQUATIONS显示文摘Under the assumption that h(z) is strictly monotone the existence of solutions to a type of nonlinear differential-iterative equations in the form of x’(t) = g(x(t)) -h(x(x(t))) is discussed according to the behavior of the quasi-isoclinic curve C: x=h^-1 (g(t))GE WEIGAO(Department of Applied Mathematics, Beijing Institute of Technology, Beijing 100081, China.) LI CUIZHE(Department of Applied Mathematics, Beijing Institute of Technology, Beijing 100081, China.) YU YUANHONG(Inditute of Applied Mathematics, Acad 2000Chinese Annals of Mathematics,Series B2000,21,2:2
6STUDY ON DEVELOPMENT STRATEGY OF SHIPPING CENTERS AND TRANSPORTATION NETWORKS IN THE YELLOW SEA RIM显示文摘It is very important to establish cooperative mechanism to guarantee all members to develop their economies in the Yellow Sea Rim. In this paper, th e development strategies of shipping centers and transportation network are disc ussed based on economic globalization tendency. The results argue that a united transportation network should be built in order to promote the economic competit ion of Northeast Asia in the world. As a key component of the economic cooperati on, a hierarchical shipping centers network should be established with Hong Kong , Shanghai, Pusan, Kobe, and Tokyo as cores. The authorities of China, Japan,R. O. Korea and D. P. R. Korea should make more efforts to build a set of cooperat ion institutions based on raising the transportation efficiency.JIN Feng-jun (Institute of Geographic Sciences and Natural Resources Research, Chinese Acad emy of Sciences, Beijing 100101, P.R. China) 2003Chinese Geographical Science2003,13,2:2
7Interleukirr37 mediates the antitu- mot activity in hepatoeellular carcinoma: role for CD57+ NK cells 显示文摘and IL-18-binding protein re- Natl Acad Sci USA 2002 99 Zhao J J Pan Q Z Pan K 2014Sei Rep2014,4,:1
8lsolation of arabinose from a mixture of arabinose and xylose via theirN-p-nitrophenylglycosy l-amines显示文摘Bilik V Kramar A Slovak Acad 0,,05:1
9Relationship of egg parasitoids of rice planthoppers between rice and non-rice habitats显示文摘Egg parasitoids, Anagrus spp. and Oligositaspp. have been found to be important biological agents in suppressing rice planthoppers in Asian countries. However, most of these studies have been confined to conditions within rice fields. In this study, field surveys were made to study the floral and faunal diversity in various habitats surrounding rice fields. The rice and grass (Echinochloa spp.) plants were infested with 2 gravid females of brown planthopper Toya spp. or T. pusanus per tiller respectively for two days. The oviposited plants were:1) Rice plants bearing BPH eggs, 2) grass plants bearing BPH eggs, 3) grass plants bearing Toya spp eggs, and 4) grass plants bearing T. pusanus eggs. Above plants were placed in the rice field, the grassy area adjacent to rice fields and the grassy area away from rice fields, respectively. Potted plants withYU Xiaoping,Zhejiang Acad Agri Sci,Hangzhou 310021,China China Heung KL.IRRI,Philippines Hu Cui,Zhejiang Agric Univ,Hangzhou 310029,China 1996Chinese Rice Research Newsletter1996,4,3:1
10Ne wbom and infant hearing loss : Detection and in-tervention显示文摘American Acade my of Pediartics 1999Pediarrtics1999,103,2:1
11Language of early and later indentife children with hearing loss显示文摘American Acade my of Pediatrics 1998Pediatrice1998,102,5:1
12A randomized decay in acquired knowledge among pediatric resuscitation course显示文摘SU E SCHMIDT T A controlled trial to assess paramedics completing a Acad Emerg Med 2000 MANN N C 20007(7) : 779-7862000,7,7:1
13Construction of Oryza sativa genome contigs by fingerprint strategy显示文摘We described the construction of BAC contigs of the genome of a indica variety of Oryza sativa, Guang Lu Ai 4.An entire representative (sixfold coverage of rice chromosomes) and genetically stable BAC library of rice genome constructed in this lab has been systematically analysed by restriction enzyme fragmentation and polyacrylamide gel electrophoresis. And all the images thus obtained were subject to image-processing, which consisted of preliminary location of bands, cooperative tracking of lanesby correlation of adjacent bands, a precise densitometric pass, alignment at the marker bands with the standard,optional interactive editing, and normalization of the accepted bands. The contigs were generated based on the Computer Software specially designed for genome map ping. The number of contigs with 600 kb in length on average was 464; of contigs with 1000 kb in length on average was 107; of contigs with 1500 kb in length on average was 23. Therefore, all the contigs we have obtained amounted up to 420 megabases in length. Considering the size of rice genome (430 megabased), the contigs generated in this lab have covered nearly 98% of the rice genome. We are now in the process of mapping the contigs to chromosomes.TAO QUANZHOU YUEMIN QIAN HAIYING ZHAO SHULIANG YU LONGFANG QIU BOQIAN WU JIA ZHU DI YU XIAOHUI LIU GUOFAN HONG(National Center for Gene Research, Chinese Academy of Sciences, Shanghai 200233, China.)(Shanghai Institute of Biochemistry, Chinese Acad 1995Cell Research1995,5,2:1
14The ageing characteristics of ternary Al-Zn-Mg alloys 显示文摘Graf R Acad C R 1957J Inst Metals1957,86,:1
15Clinical practice guideline :diagnosis and management of childhood obstructive sleep apnea syndrome 显示文摘American acade of pediatrics 2002Pediatrics2002,109,4:1
16Dynamic study of photosensitized one-electron oxidation of polyG by menadione显示文摘The electron transfer reaction of triplet menadione (3MQ?) with polyguanylic acid (polyG) in CH3CN rich (97%) solution was investigated by 248 nm(KrF) laser flash photolysis.The transient absorption spectra and kinetics obtained from the interaction of 3MQ? with polyG demonstrated that the primary radical ion pair,radical cation of polyG and radical anion of me-nadione can be detected simultaneously.The results demonstrated that the reaction rate con-stant of 3MQ? with polyG is almost equal to that of 3MQ? with dGMP.MA Jianhua1,LIN Weizhen2,DU Fuqiang2,HAN Zhenhui2,YAO Side2 & LIN Nianyun2 1.College of Biology Engineering,Jimei University,Xiamen 361021,China 2.Laboratory of Nanobiomedicine & Laboratory of Radiation Chemistry,Shanghai Institute of Applied Physics,Chinese Acade Sciences,Shanghai 201800,China 2005Science China Chemistry2005,48,4:1
17Mesoseopie Noise:Common Sense View 显示文摘LANDAUER R ACAD Ann N Y 1996Physiea B1996,227,:1
18The gut microbiota regulates fat storage 显示文摘Backhed F Ding H Wang T as an environmental factor that Proc Natl Acad Sci U S A 2004101 (44) : 15718-157232004,101,15:1
19s prevent lpha sup- pression显示文摘Joussen AM Poulaki V Mitsiades Nonsteroidal anti-inflammatory drug early diabetic retinopathy via TNF-a Acad Sci N 2002FASEB J2002,16,3:1
20Rice with high K utilization efficiency显示文摘China is short of potassium resources, it only produces about 30 tof potash fertilizers per year.Liu Guodong and Liu Gengling, Inst of Natural Resources and Regional Planning, Chinese Acad of Agri Sci, Beijing 200081, China Marshall Porterfield, Dept of Biological Sci, Univ of Missouri-Rolla, MO 65409, USA 2002Chinese Rice Research Newsletter2002,10,3:1
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