人乳铁蛋白基因的克隆及序列分析与重组逆转录病毒质粒载体PLNCX2-hLF的构建

从正常人外周血中性粒白细胞中提取总RNA，用RT-PCR的方法扩增人乳铁蛋白（hLF）cDNA，将其克隆到pMD18-T Simple载体上并测序．用限制性内切酶Xho Ⅰ和Hind Ⅲ将目的片段与逆转录病毒载体PLNCX2进行双酶切、并用T4连接酶进行连接；然后转化到top10菌中，再次进行DNA序列测定．前后两次序列测定结果一致，没有突变，全长为2，136bp，说明所克隆的为hLF基因的cDNA序列；与GeneBank中登录的序列相比，同源性达99％以上．     

全长人lrp基因及其截短和定点突变体真核表达载体的构建

为了对脂多糖应答基因（lrp）的功能进行深入的研究,实验用PCR及双PCR法扩增出lrp基因的截短体（lrp△C）和突变体（lrpm）序列,测序正确后将正常lrp基因及其截短体和突变体序列均连入真核表达载体pcDNA3．1（＋）,构建重组质粒pcDNA3．1（＋）-lrp、pcDNA3．1（＋）-lrp△C和pcDNA3．1（＋）-lrpm。DNA测序结果显示,PCR反应成功得到了lrp基因的截短体和突变体序列;重组质粒酶切鉴定结果显示：人lrp基因及其截短体、突变体成功连入了真核表达载体pcDNA3．1（＋）。     

可溶性人干细胞因子的原核表达和纯化

用Trizol提取人骨髓总RNA,通过RT-PCR扩增人干细胞因子DNA,克隆到pMD18-T载体中并测序．将其定向连入原核表达载体pET32a( ),获得了重组表达载体pET32a( )／hSCF,其cDNA长度为504bp,测序结果与已知序列吻合．然后在大肠杆菌BL21中经IPTG诱导表达,获得37kD的融合蛋白,约占菌体总蛋白量的30％．经Ni^2 -NTA树脂亲和层析柱纯化获得纯度大约90％的重组蛋白．     

百合花发育相关基因LLGLO1的RNAi载体构建

百合花发育相关基因的研究是开展花卉分子育种的重要基础。以麝香百合(Lilium longi-florumThumb.)未开放的花蕾为材料提取总RNA。根据LLGLO1序列的同源比对选取特异区段,设计引物扩增区段cDNA并引入酶切位点。将PCR扩增片断连接到T载体上,经酶切及PCR验证后进行测序。测序结果表明:用于RNAi的cDNA片断与LLGLO1序列完全相同。通过中间载体pSK+intron引入一段内含子间隔区,RNA干扰片断经过多次的酶切和连接过程最终连入表达载体pCAMBIA1301中形成ihpRNA结构。PCR及双酶切鉴定结果显示,构建的RNA干扰载体的ihpRNA结构完整。     

海水养殖真鲷肝CYP1A基因的克隆与表达

根据国外已发表野生真鲷（Pagrus major）肝CYP1A cDNA同源序列，利用反转录-聚合酶链式反应（RT-PCR）从我国海水养殖真鲷（Pagrus major）的肝脏中扩增出P4501A基因全长cDNA序列（1548bp）．用基因重组技术将P4501A cDNA克隆于pTrc-CKS载体，在大肠杆菌TOP10F＇诱导表达，将细菌总蛋白进行SDS聚丙烯酰胺凝胶电泳分析；其表达产物为89ku，获得了表达融合蛋白CKS-CYP1A．该项研究将为利用免疫学技术研究有机污染物的毒性效应机制以及探讨P450酶作为毒性效应的生物标志物奠定基础．     

猪肝脏和肌肉肉碱脂酰转移酶I基因片段克隆及序列分析

分别从金皮F2代猪的肝脏、第十肋背最长肌中提取总RNA,并根据报道的猪L—CPT I cDNA和M—CPT I cDNA序列分别设计引物1和引物2,用反转录一聚合酶链式反应（RT—PCR）进行cDNA扩增,获得两条长度分别为733bp和510bp的片段,克隆于pUCm-TVector后进行序列分析。结果表明,长度为733bp的片段为L—CPTI基因cDNA的部分序列,编码243个氨基酸,而长度为510bp的片段则为M—CPTI基因cDNA的部分序列,编码169个氨基酸。得到的两条基因片段与报道的猪L—CPT IcDNA和M—CPT IcDNA部分序列同源性分别为99.59％和99．61％。     

小鼠脂多糖应答蛋白mlrpS的载体构建及融合蛋白表达

为构建小鼠mlrpS-cDNA基因原核、真核表达载体,大肠杆菌表达其融合蛋白。采用反转录-聚合酶链反应从经脂多糖刺激的鼠NIH3T3细胞cDNA中,扩增出编码mlrpS的cDNA。用限制性内切酶KpnⅠand XhoⅠ消化后,插入原核表达载体pTAT中,经酶切鉴定与测序证实后,转化大肠杆菌BL21（DE3）菌株。异丙基β—D硫代半乳糖苷（IPTG）诱导产生融合蛋白。经KpnⅠ和XhoⅠ酶切回收mlrpS-cDNA,插入pcDNA3．1载体中;pcDNA3．1-mlrpS再经KpnⅠ和ApaⅠ酶切后,插入到pEGFP—c1载体上,构建pEGFP-mlrpS融合的真核表达载体。构建mlrpS表达载体经测序证实,与GenBank登录的序列完全一致;双酶切鉴定证实,克隆基因正确插入载体pEGFP及pTAT;SDS—PAGE证实融合蛋白表达成功。说明：成功地构建了mlrpS原核、真核表达载体,成功正确表达了6His／mlrpS融合蛋白。     

蝴蝶兰ACC氧化酶cDNA片段的克隆及其反义植物表达载体的构建

根据已报道的蝴蝶兰ACC氧化酶的基因序列,设计了一对引物,通过RT—PCR从蝴蝶兰总RNA中扩增出ACC氧化酶的cDNA片段,将其连接到pMD19-T载体上进行测序．结果显示,该片段与参考的已报道序列具有99．70％的同源性．测序后将该基因的cDNA序列反向插入pBI221的CaMV35S启动子和nos terminator之间,构建了蝴蝶兰ACC氧化酶的反义基因植物表达载体,为进一步转化蝴蝶兰研究其对蝴蝶兰花期和生长的影响打下了基础．     

绵羊防御素sBD-1 cDNA的克隆及序列分析

从成年绵羊舌表皮组织分离提取总RNA，经反转录PCR（RT-PCR)扩增出绵羊防御素sBD-lcDNA，将扩增片段回收，重组插入克隆载体T—vector，经限制性酶切鉴定和DNA序列测定，结果扩增出cDNA215bp，与发表的绵羊sBD-lcDNA序列完全相同。该cDNA编码以个氨基酸，其中信号肽与前片段相同，成熟肽位于前片段的羧基端，由38个氨基酸残基组成。     

海甘蓝硫甙合成关键酶S—GT基因克隆及种子特异性hpRNAi载体构建

根据甘蓝型油菜S-GT（thiohydroximate S-glucosyltransferase）基因cDNA序列设计引物,以海甘蓝总DNA为模板进行PCR扩增,获得S-GT基因全长。克隆的海甘蓝S—GT序列与甘蓝型油菜序列相比,除74bp的内含予部分外有92个碱基的差别,相似性高达93．4％。分析显示该序列均有完整的开放阅读框,并表明所克隆的海甘蓝S-GT序列编码465个氨基酸,在第10个位点上比甘蓝型油菜序列少一个丙氨酸（A）,总共有23个氨基酸不同,相似性为95．06％。根据获得的基因序列设计引物扩增出同一基因序列相同但是带有不同酶切位点的两个片段,将两个片段反向插入到已构建的带有种子特异表达载体内含子的两端,成功构建了海甘蓝S-GT基因的种子特异性hpRNAi载体,为特异性降低海甘蓝的种子硫甙奠定了基础。     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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