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Measurement of Grain Growth in Nanocrystalline Materialsby Means of Differential Scanning Calorimetry

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Journal of Materials Science & Technology 1997年第6期13卷 491-494页

作者： lu, k Dong, ZF Chinese Acad Sci Inst Met Res State Key Lab RSA Shenyang 110015 Peoples R China

in this work, we demonstrated that the differential scanning calorimetry (DSC) is not always reliable in measuring thermal stability and grain growth process in nanocrystalline materials by a quantitative analysis and... 详细信息

关键词： Nanostructured materials

边臂修饰的水杨醛亚胺第四族金属配合物的合成、结构及其乙烯聚合行为研究(英文)

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化学学报 2012年第18期70卷 1909-1916页

作者：王新科 Sit met-met 孙杰唐勇谢作伟金属有机化学国家重点实验室中国科学院上海有机化学研究所上海200032 沪港化学合成联合实验室中国科学院上海有机化学研究所上海200032 香港中文大学化学系中国香港新界沙田

通过给电子基团取代的(E)-2,4-二-叔丁基-6-(苯基亚胺基甲基)苯酚与等当量的M(CH2Ph)4反应制备了一系列第四族金属的双苄基配合物.反应经历了甲苯消除及分子内苄基从金属至亚胺碳的迁移反应,中间体的分离和结构鉴定证实了该反应历程.通... 详细信息

通过给电子基团取代的(E)-2,4-二-叔丁基-6-(苯基亚胺基甲基)苯酚与等当量的M(CH2Ph)4反应制备了一系列第四族金属的双苄基配合物.反应经历了甲苯消除及分子内苄基从金属至亚胺碳的迁移反应,中间体的分离和结构鉴定证实了该反应历程.通过核磁、元素分析和X-ray单晶衍射表征了配合物的结构.在甲基铝氧烷(MMAO)的活化下,钛配合物可以高活性地催化乙烯的均聚合和乙烯/1-己烯的共聚合,而相应的锆、铪的配合物在同样的条件下则几乎没有活性.

关键词：乙烯聚合乙烯/己烯共聚合第四族金属配合物水杨醛亚胺分子内迁移

On Structure and Thermodynamics of Coherent Nanocrystals

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Journal of Materials Science & Technology 1995年第3期11卷 157-164页

作者： luCk, R lu, k ACAD SiNiCA INST MET RESNATL KEY LAB RAPIDLY SOLIDIFIED NONEQUILIBRIUM ALSHENYANG 110015PEOPLES R CHINA ACAD SiNiCA INST MET RESINT CTR MAT PHYSSHENYANG 110015PEOPLES R CHINA MAX PLANCk iNST met RES INST WERKSTOFFWISSENSCHD-70174 STUTTGARTGERMANY

Several classifications for the nanocrystalline morphologies are introduced. it is: demonstrated that coherency and coherence strain are important physical quantities, which influence the stability, the morphology and... 详细信息

关键词： On Structure and Thermodynamics of Coherent Nanocrystals nm

insights into the Microwave instruments Onboard the Fengyun 3D Satellite:Data Quality and Assimilation in the met Office NWP System

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Advances in Atmospheric Sciences 2021年第8期38卷 1379-1396页

作者： Fabien CARMiNATi Nigel ATkiNSON Brett CANDY Qifeng lu met Office Exeter EX13PBUK National Satellite meteorological Center China Meteorological AdministrationBeijing 100081China

This paper evaluates the microwave instruments onboard the latest Chinese polar-orbiting satellite, Fengyun 3D (FY- 3D). Comparing three months of observations from the Microwave Temperature Sounder 2 (MWTS-2), the Microwave Humidity Sounder 2 (MWHS-2), and the Microwave Radiation imager (MWRi) to met Office short-range forecasts, we characterize the instrumental biases, show how those biases have changed with respect to their predecessors onboard FY- 3C, and how they compare to the Advanced Technology Microwave Sounder (ATMS) onboard NOAA-20 and the Global Precipitation Measurement Microwave imager (GMi). The MWTS-2 global bias is much reduced with respect to its predecessor and compares well to ATMS at equivalent channel frequencies, differing only by 0.36 ± 0.28 k (1σ) on average. A suboptimal averaging of raw digital counts is found to cause an increase in striping noise and an ascending- descending bias. MWHS-2 benefits from a new calibration method improving the 183-GHz humidity channels with respect to its predecessor and biases for these channels are within ± 1.9 k to ATMS. MWRi presents the largest improvements, with reduced global bias and standard deviation with respect to FY-3C;although, spurious, seemingly transient, brightness temperatures have been detected in the observations at 36.5 GHz (vertical polarization). The strong solar-dependent bias that affects the instrument on FY-3C has been reduced to less than 0.2 k on average for FY-3D MWRi. Experiments where radiances from these instruments were assimilated on top of a full global system demonstrated a neutral to positive impact on the forecasts, as well as on the fit to the background of independent instruments.

关键词： microwave remote sensing numerical weather prediction data assimilation

SOLiD PHASE SYNTHESiS AND CD SPECTRUMSTUDY OF ＂ZiNC－FiNGER＂ PEPTiDE RELATED TO CAULiMOViRUS

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Chinese Chemical Letters 1995年第6期6卷 463-464页

作者： Hong Ji Ruo Heng ZHANG met Cheng SHAO(institute of Physical Chemistry, Beijing University,Beijing 100871) Beijing Univ Dept Chem Phys Beijing 100871 Peoples R China

Caulimovirus contains a highly conserved,low molecular weight protein which has a zinc finger-like motif Cys×2Cys×4His×4Cys in common with the animal *** zinc finger-like peptide of caulimovirus(17 residues)was synthesized by solid phase method for structural *** standard HF treatment and low-high HF'treatment were used to cleave the peptide from the *** peptide cleaved with low-high'HF had higher purity and yield than that with standard HF *** dichroic spectroscopy indicates that the peptide exhibits a random coil conformation in the absence of zinc but appears to form an ordered structure in the presence of zinc.

关键词： CD SPECTRUMSTUDY SYNTHESiS AND CAULiMOViRUS

O-phosphorylation of Oligopeptides with Phosphoramidite

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Chinese Chemical Letters 1998年第12期9卷 0-0+0-0页

作者： Yan met Li Yu Fen ZHAO (Bio-organic Phosphorus Chemistry Laboratory, Department of Chemistry,Tsinghua University, Beijing 100084)Herbert WALDMANN (institute of Organic Chemistry, University of karlsruhe, 76128 karlsfuhe, Germany) Tsing Hua Univ Dept Chem Bioorgan Phosphorus Chem Lab Beijing 100084 Peoples R China Univ karlsruhe Inst Organ Chem D-76128 Karlsruhe Germany

Phosphopeptides were synthesized with bis-alkyloxy-N,N-dialkylphosphorfollowed by oxidation. Many hydroxyl groups in oligopeptides can be O-phosphorylated in onestep.

关键词： Phosphopeptide phosphoramidite

A rapid easy-to-perform solid phase digoxin radioimmunoassay

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Nuclear Science and Techniques 1998年第4期9卷 251-253页

作者： Li Bin Zhou met-Ying Liu Fang-Yan Wang met-Di (Shanghai institute of Nuclear Research, the Chinese Academy of Sciences, Shanghai 201800)

A solid-phase-radioimmunoassay (SPRiA) for the monitoring of blood digoxinlevel has been developed, in which a secondary antibody-coated polystyrene tubes are *** noval method seems to be simple to use and only takes about an half hour. The standardcurve is linear from 0.25 to 4 μg/L. The sensitivity of the detection is 0.1 μg/L. Reproducibilitystudies with 3 control sera of 0.5-2.5 μg/L give illtraassay CVinterassay CVimens are measured and compared with those of the conventional radioimmunoassayand the values are well correlated (r=0.96, Y=1.022X+0.04 μg/L).

关键词：血液地谷新形成光致发光监测

Drosophila as a model for antiviral immunity

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World Journal of Biological Chemistry 2010年第5期1卷 151-159页

作者： Susanna Valanne Mika Rmet institute of Medical Technology University of Tampere Department of Paediatrics Tampere University Hospital

The fruit fly Drosophila melanogaster has been successfully used to study numerous biological processes including immune *** are naturally infected with more than twenty RNA viruses making it a valid model organism to study host-pathogen interactions during viral *** Drosophila antiviral immunity includes RNA interference,activation of the JAk/STAT and other signaling cascades and other mechanisms such as autophagy and interactions with other *** we review Drosophila as an immunological research model as well as recent advances in the field ofDrosophila antiviral immunity.

关键词： Antiviral Drosophila Genetics immune signaling infection JAk/STAT RNA interference Virus

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塞尚：用苹果震慑世界

疯狂英语（初中天地） 2008年第9期 22-25页

作者： met kC

保罗·塞尚(1839-1906)画过数百个苹果。如何以一个苹果震慑19世纪艺术之都那些鉴赏力过人的评论家呢?你可以尝试画一个别人从没画得如此逼真的苹果。或者,你可以向人们展示一种看苹果的全新方式。

关键词：后印象派印象主义立体派毕沙罗报春花调色刀毕加索