检索结果-南通市图书馆

cDNA Cloning of Two Novel T-superfamily Conotoxins from Conus leopardus

在线全文

学校读者我要写书评

暂无评论

Acta Biochimica et Biophysica Sinica 2006年第4期38卷 287-291页

作者： Wei-Hua CHEN~(1,2.) Yu-Hong HAN~(2.3#) Qi WANG~(2.3#) Xiao-Wei MIAO~(2.4) Ling OU~1 Xiao-Xia SHAO~2. 1 Bioengineering Institute,East china university of Science and Technology,Shanghai 2.02.7,{2. 2.Institute of Protein Research,Tongji university,Shanghai 2.0092.{2. 3 Institute of Biochemistry and Cell Biology,Shanghai Institute of Biochemical Sciences,Chinese Academy of Sciences,Shanghai 2.0031,{2. 4 Department of Biological Engineering,school of Life Science,Shanghai university,Shanghai 2.0436,{2. Bioengineering Institute East China University of Science and Technology Shanghai 200237 China

The full-length cDNAs of two novel T-superfamily conotoxins,Lp5.1 and Lp5.2.were clonedfrom a vermivorous cone snail Conus leopardus using 3'/5'-rapid amplification of cDNA *** cDNA ofLp5.1 encodes a precursor of 65 residues,including a 2.-residue signal peptide,a 2.-residue propeptide anda 15-residue mature ***5.1 is processed at the common signal site -X-Arg- immediately before themature peptide *** the case of Lp5.2.the precursor includes a 2.-residue signal peptide anda 43-residue sequence comprising the propeptide and mature peptide,which is probably cleaved to yield a2.-residue propeptide and a 14-residue mature *** these two conotoxins share a similar signalsequence and a conserved disulfide pattern with the known T-superfamily,the pro-region and mature peptidesare of low identity,especially Lp5.2.with an identity as low as 10.7% compared with the reference *** elucidated cDNAs of these two toxins will facilitate a better understanding of the species distribution,the sequence diversity of T-superfamily conotoxins,the special gene structure and the evolution of thesepeptides.

关键词： Conus leopardus T-superfamily conotoxin cDNA cloning

Taxonomic revision of Lepisorus(***.) Ching ***(Polypodiaceae) from china

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Systematics and Evolution 2009年第6期47卷 581-598页

作者： ~(1,2.Xin-Ping QI ~1Xian-Chun ZHANG~* 1(State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,china) 2.graduate {2. of Chinese Academy of Sciences,Beijing 100049,china) ( graduate university of Chinese Academy of Sciences Beijing 100049 China)

The taxonomy of Lepisorus(***.) Ching *** in china was revised based on herbarium specimen examinations,field observations,and microscopic study of rhizome scales,soral paraphyses,leaf epidermis, and *** a result,nine species were recognized:Lepisorus macrosphaerus(Baker) Ching,Lepisorus asterolepis (Baker) Ching,Lepisorus marginatus Ching,Lepisorus kuchenensis(***) Ching,Lepisorus megasorus(***.) Ching,Lepisorus kawakamii(Hayata) Tagawa,Lepisorus subsessilis Ching & ***,Lepisorus affinis Ching, and Lepisorus nudus(Hook.) *** kawakamii(Hayata) Tagawa was reinstated;Lepisorus gyirongensis Ching & *** and Lepisorus longus Ching were reduced to synonyms *** and ***,respectively. The subdivision ofLepisorus macrosphaerus was not *** scales and paraphyses are the most useful characters for species delimitation as well as for infrageneric *** of the leaf epidermis and spore ornamentation are usually stable and thus of great significance in understanding the relationships among groups within the genus.

关键词： china Lepisorus Lepisorus sect.Lepisorus Polypodiaceae taxonomic revision

唐末三家古文艺术论——从皮、陆、罗“小品”的“光彩和锋芒”说起

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

武汉大学学报（人文科学版） 2005年第5期58卷 558-566页

作者：熊礼汇武汉大学文学院湖北武汉430072

小品兴盛是唐末散文创作的突出现象,但不是惟一现象。皮、陆、罗主要以古文创作见长,不能将其古文都视为小品。三家古文各具艺术特色,不能因为鲁迅说了“罗隐的《谗书》几乎全部都是抗争和愤激之谈”,就把罗隐称为晚唐小品文作家中最具... 详细信息

小品兴盛是唐末散文创作的突出现象,但不是惟一现象。皮、陆、罗主要以古文创作见长,不能将其古文都视为小品。三家古文各具艺术特色,不能因为鲁迅说了“罗隐的《谗书》几乎全部都是抗争和愤激之谈”,就把罗隐称为晚唐小品文作家中最具“光彩和锋芒”的“第一位”。

关键词：小品古文闲情别致

Viewpoint Manipulation for Interactive Television by Using Human Pose Estimation

在线全文

学校读者我要写书评

暂无评论

Journal of Shanghai Jiaotong university(Science) 2011年第5期16卷 538-542页

作者：仝明磊 school of Computer and Information Shanghai University of Electric Power

In current interactive television schemes, the viewpoints should be manipulated by the user. However, there is no efficient method, to assist a user in automatically identifying and tracking the optimum viewpoint when the user observes the object of interest because many objects, most often humans, move rapidly and frequently. This paper proposes a novel framework for determining and tracking the virtual camera to best capture the front of the person of interest (PoI). First, one PoI is interactively chosen in a segmented 3D scene reconstructed by space carving method. Second, key points of the human torso of the PoI are detected by using a model-based method and the human's global motion including rotation and translation is estimated by using a close-formed method with 3 corresponding points. At the last step, the front direction of PoI is tracked temporally by using the unscented particle filter (UPF). Experimental results show that the method can properly compute the front direction of the PoI and robustly track the best viewpoints.

关键词： free viewpoint video human pose estimation voxel space carving

超声分子束在HL-1M托卡马克等离子体中的消融和穿透

在线全文

学校读者我要写书评

暂无评论

物理学报 2004年第4期53卷 1123-1128页

作者：焦一鸣周艳姚良骅董家齐电子科技大学光电信息学院成都610054 核工业西南物理研究院成都610041

讨论并研究了超声分子束在托卡马克等离子体中的消融和穿透问题 ,其中包括了分子束的绝热膨胀 ,团簇的形成和解离 ,束的静电屏蔽效应和冷通道效应 .研究结果表明 ,在考虑了这些效应以后数值得到的结果与实验结果相近 .

关键词：超声分子束托卡马克等离子体消融穿透静电屏蔽效应冷通道效应

Partial hydrogenation of adiponitrile to 6-aminocapronitrile over Ni/α-Al_2._3 catalyst promoted with K_2. and La_2._3

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2007年第6期18卷 685-688页

作者： Lei Zhao, Cai Yun Wang, Ji Xiang Chen , Ji Yan Zhang Department of Catalysis Science and Engineering, school of Chemical Engineering and Technology, Tianjin university, Tianjin 300072.{2. [a]Department of Catalysis Science and Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

A novel K2. and La2.3 promoted nickel catalyst supported on a-Al2.3 was prepared by co-impregnation method, and it exhibited higher activity and 6-aminocapronitrile selectivity than Ni/a-Al2.3 during the hydrogenation of adiponitrile in the absence of ammonia, i.e., K2. and La2.3 improved the performance of the nickel-based catalyst.

关键词： Nickel catalyst Potassium oxide Lanthana Partial hydrogenation Adiponitrile 6-Aminocapronitrile

Implication of Reported Viral Hepatitis Incidence Rate Change in Hubei Province, china, between 2.04-2.10

在线全文

学校读者我要写书评

暂无评论

Journal of Huazhong university of Science and Technology(Medical Sciences) 2012年第3期32卷 428-433页

作者：胡樱宇传华陈邦华王雷 Department of Epidemiology and Biostatistics School of Public Health of Wuhan University wuhan university Global Health Institute Institute of Infectious Disease Control and Prevention Wuhan Center for Disease Control and Prevention Institute of Infectious Disease Control and Prevention Hubei Center for Disease Control and Prevention

This study examined the change of reported incidence rate for viral hepatitis in Hubei province, china, between 2.04 to 2.10 to provide scientific evidence for viral hepatitis control. Reported viral hepatitis infection cases were queried from Centre for Disease Control of Hubei Province, china. The incidence of viral hepatitis A decreased steadily across the study period. Viral hepatitis B composed 85% of the viral hepatitis cases. When reported incidence rates for chronic hepatitis B increased, the rates of acute and unclassified cases dropped from 2.05 to 2.10. The reported viral hepatitis B incidence rate for males was around 1.5-2.times higher than for females. The average annual percentage change of reported viral hepatitis B incidence rates was 4%. The same index for viral hepatitis C was 2.%. The reported viral hepatitis B incidence rate of people under 2. years old declined over the period. This decrease was mainly attributed to the recent implementation of vaccination plan. Reported incidence rate of viral hepatitis E also rose in those years. Having a better understanding on reported incidence rates of the present surveillance system is important for developing strategies for further prevention of viral hepatitis. In addition, the data showed that a surveillance system that differentiates new and former infected cases will be more effective in providing evidence for disease control.

关键词： viral hepatitis reported incidence rate vaccination prevention

Photosynthesis of Populus euphratica and its response to elevated CO2.concentration in an arid environment

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2009年第4期19卷 443-451页

作者： Honghua Zhou a,b,c, Yaning Chena,b, Weihong Li a,b, Yapeng Chen a,b, Lixin Fud a Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, Urumqi, Xinjiang 830011, china b Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, china c {2. school of Chinese Academy of Sciences, Beijing 100039, china d College of Natural Resources and Environment Science of Xinjiang Agricultural university, Urumqi 830052. china [a]Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences 818 South Beijing Road Urumqi Xinjiang 830011 China [b]Key Laboratory of Oasis Ecology and Desert Environment Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China [c]Graduate School of Chinese Academy of Sciences Beijing 100039 China [d]College of Natural Resources and Environment Science of Xinjiang Agricultural University Urumqi 830052 China

The photosynthetic characterization of Populus euphratica and its response to the elevated carbon dioxide concentration ([CO2.) were analyzed based on its net photosynthetic rate (Pn), stomatal conductance (gs), intercellular CO2.concentration (Ci), transpiration rate (Tr), and water use effciency (WUE) at different groundwater depths measured by a portable gas exchange system (LI-6400) in the lower reaches of the Tarim River. The results showed that the elevation of [CO2. decreased the gs, and increased the Pn, Ci and WUE of P. euphratica. However, the effects of the elevated [CO2. on gs, Pn, Ci and WUE varied considerably with groundwater depth. The response of photosynthesis to rising [CO2. was stronger at the greater groundwater depth (more than 6 m) than that at the shallower groundwater depth (less than 6 m). The critical groundwater depth required to maintain the normal survival of P. euphratica was less than 6 m. When the groundwater depth increased to more than 6 m, P. euphratica encountered moderate water stress, and the plant suffered severe water stress when the groundwater depth increased to more than 7 m.

关键词： Photosynthesis Populus euphratica Groundwater depth CO2.concentration The lower reaches of the Tarim River

Preparation and characterization of Eu^(3+)-doped CaCO_3 phosphor by microwave synthesis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2009年第5期28卷 439-444页

作者： KANG Ming LIU Jun YIN Guangfu SUN Rong school of Materials Science and Engineering Southwest University of Science and Technology Mianyang 621010 China College of Materials Sctence and Engmeering Stchuan University Chengdu 610065 China Shenzhen Ocean＇s King Lighting Science and Technology Co. LTD. Shenzhen 518000 China

A Eu^3＋-doped CaCO3 phosphor with red emission was prepared by microwave synthesis. The scanning electron microscopy （SEM） image and laser particle size analysis show that the CaCO3：Eu^3＋ particles are needle-like in the length range of 5.0-10.0 μm. The results of X-ray diffraction （XRD） analysis, Fourier transform infrared spectroscopy （FT-IR）, and Raman spectroscopy indicate that pure aragonite CaCO3：Eu^3＋ is prepared using microwave irradiation and the Eu^3＋ ion as a luminescence center inhabits the site of Ca^2.. The photoluminescence excitation （PLE） spectrum shows that the strong broad band at around 2.0 nm and weak sharp lines in 300-550 nm are assigned to the charge transfer band of Eu^3＋-O^2. and intra-configurational 4f-4f transitions of Eu^3＋, respectively. The photoluminescence （PL） spectrum implies that the red luminescence can be attributed to the transitions from the ^5D0 excited level to the ^7FJ （J = 0, 1, 2. 3, 4） levels of Eu^3＋ ions with the mainly electric dipole transition ^5D0 → ^7F2.（614 and 62. nm）, and the Eu^3＋ ions prefer to occupy the low symmetric site in the crystal lattice.

关键词： phosphors calcium carbonate Eu^3+-doped microwave synthesis photoluminescence