四体

(1) Exon 6,7,8 have no relation with the susceptibility of HCV infection. The genetic basis of the four amino acids is highly conserved in Chinese population. Because other sites of CD81 protein are highly conserved among species, there is no or very rare polymorphism of CD8I in Chinese people.(2) The susceptibility of HCV infection has nothing to do with the genetic basis of the ligand binding region of LDLR.Postgraduate DongQiumingDirected by Professor Gao Jinsheng Professor Lu Daru

（1）CD81外显子6、7、8与HCV感染的易感性无关，以上四个氨基酸的遗传基础在中国人中是高度保守的；由于CD81蛋白的其它位点在种间是高度保守的， CD81，LDLR单核菩酸多态拄与丙型肝炎病毒感染易感性的相关性研究摘要因此，在中国人群中 CDSI蛋白的多态性稀少或不存在。u）HCV感染的易感性与LDLR的配体结合结构域的遗传基础无关。

Inverted surcharge of "temporarily used for" 2c on 3c junk 1st peking print, used on piece, tied by shanghai dater on sep 24, 1924, this stamp has the same position from the setting as that listed on p.270 of "prize selections爁rom the rocpex taipei'81", only about 20 pieces believed to exist, well-known as one of the "four rarities of republic of china", from overseas collector, extremely precious, vf rmb:

贴北京一版帆船加盖"暂作"改值邮票2分/3分倒盖变体剪片，销上海1924年9月24日戳，颜色鲜艳，齿孔完整，此票与台湾《邮展选萃》270页图为同一位置版式，存世仅二十枚左右，为"民国四珍"之一，此票源自海外藏家，首次在中国大陆拍卖会上出现，极少见，上品

The purpose of this study is to analyze the characteristics of radiochromic film dosimetry, including the film response versus time, dose linearity, energy dependence and angular dependence. In addition, we measure the output factors for the field defining collimators used in gamma knife by using spherical phantom. The measurement results were compared with the results of Monte Carlo simulation.

本研究将探讨辐射变色软片侦测辐射之特性，包括软片反应与时间关系、剂量线性度、能量依存度及角度依存度；并使用加马刀立体定位放射手术剂量验证用之球型假体，量测加马刀四种不同大小准直仪头盔之剂量分布及相对输出因子，并与蒙地卡罗模拟结果作一比较分析。

For example, lactate dehydrogenase as a tetramer.

例如乳酸脱氢酶为四聚体。

Herein, we report the enantioselective total syntheses of slagenins A-C and their antipodes. Starting from readily available ethyl -4-chloro-3-hydroxy-butanonate, elongation of the carbon chain with diazomethane, followed by oxidation of the given α-diazoketone using distilled DMD, afforded a key intermediate α-ketoaldehyde .

本文从方便易得的-4-氯-3-羟基-丁酸乙酯出发，经重氮甲烷延伸碳连、DMD氧化相应的α-重氮酮，制得α-酮醛；该化合物与尿素在氢氟酸作用下，以协同方式非对映选择性的直接构建了cis-四氢呋喃并[2，3-d]咪唑啉-2-酮双环结构，进而合成了天然产物slagenins A、B、和C的对映体。

Autotetraploids from diploidy leaves of Paulownia elongata on the double layer MS media supplemented with 0.1 mg/L NAA and 15 mg/L BA(optimal organogenetic medium to the leaves of diploidy seedlings) with different colchicines concentrations were induced,chromosome numbering of the plant root tip cells and DNA content analysis of the leaf single cell were used to analyse the autotetra ploids.

在含不同浓度秋水仙素的MS+0.1mg/L NAA+15mg/L BA双层培养基上进行兰考泡桐四倍体植株诱导试验，并通过变异植株根尖细胞染色体观察和叶片单细胞DNA含量测定进行倍性分析。

Each Ln ion adopts a dodecahedron coordination environment with eight coordinated oxygen atoms from two terminal monodentate coordinated FcC6H4COO- units, two terminal monodentate coordinated H2O molecules, and fourμ_2-η~2--OOCH_4C_6Fc units.

稀土离子都是八配位的三角十二面体构型，其中两个来自单齿配位的FcC6H4COO-，两个来自配位的水分子，四个来自双齿桥联的μ_2-η~2--OOCH_4C_6Fc。

Based on the analysis of operation mechanism and development of the charge pump,as well as the factors limiting its efficiency and speed,a new method using triple-well structure and charge transfer switches is suggested to eliminate threshold voltage drop and body effect.The clock driving circuit is specially optimized to lower output resistance,and speed up the response.

在分析电压泵工作原理和结构演变并指出当前实现方法在驱动和响应上的制约因素的基础上，结合目前先进Flash Memory工作电压和工作要求，提出了结合三阱工艺和CTS方法以消除体效应和阈值电压降从而提高性能的四相位电荷泵设计方法，专门对时钟驱动进行的优化，提高了响应速度。

At the beginning, HLA class I/peptide complex teramer was prepared, including the most frequent alleles in Chinese, i.e., HLA-A2 and HLA-A24. Then the aAPCs were assembled by coating a cell-sized bead with pMHC and anti-CD28 antibody, which were able to provide the dual signals required for T cell activation, and used as stimulator to generate pMHC-specific CTL by co-culture with allogeneic peripheral blood lymphocyte.

首先制备包括我国人群基因频率最高的HLA-A2，HLA-A24的HLA/抗原肽四聚体，在此基础上，制备能够为T细胞提供第一、第二活化信号的aAPC，其表面包被的HLA/抗原肽复合物容易控制，用于诱导同种个体的T细胞产生同种CTL。

The varieties of sorghum which were diffused through the Islamic world after the Arab conquests appear to have come from India, since they were all the tetraploid Sorghum durra , which was developed in the sub-continent.

阿拉伯人占领此地区后，在伊斯兰世界扩散的高粱品种似乎是来自印度，因为它们都是生长在南亚次大陆的四倍体高粱。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。