50例中国人IX因子基因的限制性片段长度多态性

用IX因子基因内探针F9(VⅢ)对TaqI,BamHI和EcoRI酶切的50例中国人基因组DNA进行杂交分析。结果表明,所有个体经TaqI酶切的杂交片段为4.5kb和1.8kb,BamHI和EcoRI酶切的杂交片段分别为23kb和5.0 kb。基因组DNA样本中未发现限制性片段长度多态性(RFLP),这与欧美国家的民族群体中存在着IX因子基因内TaqI和BamHI的RFLP的结论不同。造成不同种族间DNA水平差异的原因,很可能与长期在不同地理环境中的进化适应有关。     

用α—珠蛋白基因探针对两例Hb—Bart''''s胎儿双亲的α—基因的探测

采用限制性内切酶印迹杂交放射性自显影技术和α—珠蛋白基因探针分析了二例Hb—Bart's胎儿水肿综合征及其双亲的α—珠蛋白基因,其分析结果表明:Hb—Bart's胎儿水肿综合征没有α—基因;其双亲则以内切酶HindⅢ消化其DNA得到17、4.5、3.8kb α—基因特异片段,用内切酶Bgl Ⅱ消化则得12.3、7.2kb二个α—基因特异片段。其基因图谱与正常人相似,为正常人的一半。     

α—地中海贫血患者的α—珠蛋白基因组织的分析

α-地中海贫血是由于α-珠蛋白基因全部和部分缺失所致的一种遗传性溶血性贫血综合征。本文从重组质粒pHα_2中提取和纯化α_2片段(1.6kb),以α-~(32)p-dCTP标记做珠蛋白基因探针对Hb-H病人和Hb-Bart水肿综合征的血细胞DNA进行限制性内切酶谱分析。用HindⅢ和BglⅡ酶解Hb-H病人的非缺失型分别得16.4、4.5和3.8Kb三个特异片段和12.5、7.5二个片段。而Hb-H缺失型病人分别得到16.4、4.5和7.5或16Kb特异的α-基因片段。酶解Hb-Bart胎儿血DNA则没有α-基因特异片段。     

新疆维吾尔族和回族人TK—C基因多态性研究

本实验首次研究了少数民族人体细胞质胸苷激酶(TK—C)基因的限制性片段长度多态(Restriction Fragment Length Poly—morphism,简称RFLPs)现象。以人基因组TK—C基因中无重复顺序DNA片段PHK1.25/HindⅢ BamHⅠ作为探针,和经限制性内切酶KpnⅠ消化的人体基因组DNA做Southern杂交,发现了3.1kb和2.6kb两种长度的片段。在经分折的22个维吾尔族人基因组DNA样品中,4个个体为3.1kb纯合子,8个个体为2.6kb纯合子,10个个体为3.1和2.6kb杂合子;同时,对20个回族人基因组DNA研究表明,5个为3.1kb纯合子,7个为2.6kb纯合子,8个为3.1和2.6kb杂合子。由此推测片段长度差异可能是由于Alu重复顺序的同源重组造成DNA片段的缺失或重复;而不同人群等位片段间频率的差异为研究人群迁移和近代分子进化提供了线索。同时,也为利用TK基因的RFLPs进行医学遗传学诊断提供了一定的理论基础。     

大鼠HPRT基因敲除载体的构建

根据已知大鼠HPRT基因的外显子序列,从大鼠HPRT基因BAC中用酶切和PCR方法分别分离得到用于构建基因敲除载体的3.0kb和1.7kb的长臂(LongArm,LA)和短臂(ShortArm,SA),并克隆到pSL1180和pKO中.3.0kb长臂片段包含5′端部分序列和exon1部分序列,1.7kb短臂位于exon6和exon7之间.依次将neor、SA、LA克隆到pBS相应酶切位点,得到pBS-HPRT,再将LA-neor-SA片段由pBS中切出,克隆到pKO的KpnI和NotI位点之间,得到大鼠HPRT基因敲除载体pKO-HPRT.     

酵母酸性磷酸酯酶基因PHO81克隆的初步研究

酵母PHO81基因是调控阻遏酸性磷酸酯酶的的一种中介因子,其编码区由3531个核苷酸组成。由于片段较大,目前很难应用PCR技术一次予以扩增。本文用自行设计的4个引物以啤酒酵母总染色体DNA为模板借助PCR技术扩增PHO81基因的两个片段,其长度分别为1.3kb和2.2kb,通过限制性酶切将其装入载体质粒pUC18中。并初步进行了重组质粒限制性内切酶酶谱分析和Southern杂交试验。     

黑麦Rubisco大亚基基因(rbc L)的克隆及其限制性内切酶图谱的构建

以小麦的rbc L为探针,分别与黑麦ctDNA EcoR I,BamH I,Hind III的酶切谱带进行Southern杂交。结果发现,E13(2.15 kb),B2(10.7 kb),H2(10.4 kb)均含有rbc L基因。用pUC9为载体克隆黑麦ctDNA的B2片段,Southern杂交后表明,得到的重组质粒含有rbc L基因,将其命名为pRCB2。设计了一种快速准确的分析方法,构建出pRCB2质粒DNA的限制性内切酶图谱,rbc L被定位在一个2.8 kb的区域内。     

插入Tn21质粒的分离和链霉素抗性基因质粒的组建

在携带R100.1和pSO101质粒的Lc2640细胞中分离到重组质粒pXZ2712,该质粒对链霉素、氯化汞、磺胺和四环索有抗性。用仅带有Tn21两个末端的质粒pXZ2作为探针进行分子杂交,发现两者有同源性,说明质粒pXZ2712是由Tn21插入质粒pSC101所组成的。以pXZ2712质粒中分离到的带有链霉素抗性基因的片段,组建了带有抗链霉素基因的pXZ6(14.5kb)、pYP1(9.7kb)、pYP22(9.1kb)和pYP4(4.0kb)等质粒载体。     

北京鸭核DNA中β-珠蛋白基因的初步鉴定

以鸡β-珠蛋白基因为探针、用Southern blot杂交方法和蔗糖密度梯度超速离心——点膜杂交的方法、鉴定出北京鸭β-珠蛋白基因位于核DNA的EcoRI限制性内切酶酶切片段中大小约为20～23kb部分。     

甜菜夜蛾核多角体病毒基因组13.7～21.6 m.u.区域的分析

甜菜夜蛾核多角体病毒(Spodoptera exigua multicapsid nucleopolyhedrovirus,SeMNPV)基因组13．7～21．6m．u．区域是SeMNPV的重组热点区。以SeMNPV美国分离株SeUS1为模板,长片段PCR对SeUS1的13．7～21．6m．u．区域扩增,得到11．3kb,2．0kb和0．7kb3个片段。对照已发表的SeMNPV基因组序列,11．3kb片段是具完整SeMNPV序列基因型的产物,2.0kb和0．7kb片段表明SeUS1中还存在两种缺失突变株。对2．0kb和0．7kb片段的序列分析揭示了这两株突变株在缺失部位的DNA一级结构。对三株重组SeMNPV病毒(SeXDl、SeXD2和SeXD3)的分析发现,它们和野生型病毒SeUS1中的一个基因型一样,均缺失了SeMNPV nt 18513～29105之间长10593bp的片段,暗示SeUS1中一株自发形成的缺失突变体在离体细胞中具有复制优势。将该片段基因排列与其它10种基因组序列已测定的杆状病毒比较,发现两个在GroupⅡ NPVs中保守的基因簇。最大简约性法对部分基因的系统发育分析表明,缺失片段中某些基因可能存在于杆状病毒分化之前的病毒基因组中。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

正~~