查询词典 sci.

Methods Clinical data of 104 cases with SCI by shown on CT and MRI in our hospital from 2004 to 2005 were presented retrospectively with literature review.Results There were 239 cerebral infarctions in this group.

分析我院从2004～2005年确诊的104例经头颅CT和MRI扫描证实的无症状脑梗死的临床资料，并进行相关文献复习。

RIZ is frequently involved in colorectal carcinogenesis. Proc Natl Acad Sci U S

果表明，苦参碱不仅是苦参的主要组成成分，也是苦参抗肿瘤

Song R, Messing J: Gene expression of a gene family in maizebased on noncolinear haplotypes. Proc Natl Acad Sci USA 2003

改文章给我的启示许多，基因的存在和缺失也是等位基因的一种形式就是其一，尽管后来该文章的结论不断被修正。

A DNA vectorbased RNAi technology to suppress gene expression in mammalian cells〔J〕.Proc Natl Acad Sci U S A,2002;99(8):551520.12 Konnikova L,Kotecki M,Krugerm M,et al.

Konnikova〔12〕报道在星形胶质细胞瘤细胞株中沉默STAT3基因的表达后，会抑制肿瘤细胞的增殖并导致细胞凋亡。

Construction of biologically functional bacterial plasmids in vitro . Proc. Natl. Acad. Sci. USA 70, 3240 – 3244 (1973).^ Patricia S. Thomas, Hybridization of Denatured RNA and Small DNA Fragments Transferred to Nitrocellulose PNAS 1980; 77: 5201-5205 PNAS Keith Roberts, Martin Raff, Bruce Alberts, Peter Walter, Julian Lewis and Alexander Johnson, Molecular Biology of the Cell

一个很典型的例子就是DNA分子大小的测量：在凝胶电泳出现之前，DNA分子大小是用蔗糖密度梯度沉降法来测量的，这一方法费时费力而且花费昂贵；而在梯度沉降法出现之前，使用的是黏度法。

Pantaleo G,Graziosic,Demarest JF,et al.HIV infection is active and progressive in lymphoid tissue during the clinically latent stage of disease［J］.Nature,1993,362:355～360［5］Moss PAH,Rowland-Jones S,Frodsham PM,et al.Persistent high frequency of human immunodeficiency virus-specific cytolytic T cell in peripheral blood of infected donors［J］.Proc Natl Acad Sci USA,1995,92:5773～5777

一些研究显示在无免疫肌肉大夫压力下体外传代HIV的状况类似体内免疫肌肉系统全面崩溃的感染血液末期的状况：HIV变异株相对少，株间变异小，但毒力强、复制快、病毒痔疮产量高，可形成多核巨细胞疑难等等；HIV在适应了体外培养的环境和宿主细胞疑难、失去了选择大夫压力后，少数变异株在传代过程中经逐步稀释后逃脱优势株的抑制逐渐被固定下来而成为新的优势株［7］。

Pantaleo G,Graziosic,Demarest JF,et al.HIV infection is active and progressive in lymphoid tissue during the clinically latent stage of disease［J］.Nature,1993,362:355～360［5］Moss PAH,Rowland-Jones S,Frodsham PM,et al.Persistent high frequency of human immunodeficiency virus-specific cytolytic T cell in peripheral blood of infected donors［J］.Proc Natl Acad Sci USA,1995,92:5773～5777

一些研究显示在无免疫压力下体外传代HIV的状况类似体内免疫系统全面崩溃的感染末期的状况：HIV变异株相对少，株间变异小，但毒力强、复制快、病毒产量高，可形成多核巨细胞等等；HIV在适应了体外培养的环境和宿主细胞、失去了选择压力后，少数变异株在传代过程中经逐步稀释后逃脱优势株的抑制逐渐被固定下来而成为新的优势株［7］。

College of Electronic Sci and Engr, National Univ.

国防科技大学电子科学与工程学院，湖南长沙 410073

After the typesetters enter your corrections, the manuscript will be published online first and then a few months later in hardcopy publication.

开始时感觉读博好痛苦，没有sci不能毕业，虽然一个不怎么样的刊物，但处女作啊，这是第一个试刀的，花了我n多精力和时间，后面写的就比较顺就是，其他的还在等待中ing

Univ.;Guangzhou 510642;China; 2 College of Life Sci.;South China Agric.

华南农业大学生命科学学院广东广州510642

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。