非损伤性取样的蚕类DNA提取及检测

对家蚕和蓖麻蚕的蚕蜕和蛾翅分别采用SDS裂解法和动物组织基因组试剂盒提取法提取DNS，并与常规方法以蚕蛹提取的DNA一起进行RAPD扩增图谱比较、分析，结果表明用非损伤性方法提取的DNA的RAPD图谱和常规方法提取的DNA的RAPD图谱基本一致。     

扩展青霉(Penicillium expansum)PF898基因组DNA提取方法的比较

利用CTAB法、SDS改进法和SDS快速法3种DNA提取代表性方法,对扩展青霉(Penicillium expansum)PF898基因组DNA的提取进行比较研究.CTAB法提取的DNA样品纯度最高,SDS裂解法制备的DNA得率最高;CTAB法和SDS改进法所得DNA都可直接应用于限制性酶切分析;3种方法所提取的DNA均能满足扩展青霉PF898脂肪酶基因和18S rRNA的PCR扩增.总体而言,SDS法简便、快速、得率高,是一种理想的扩展青霉基因组DNA提取方法.     

大黄鱼基因组DNA的不同提取方法及RAPD扩增比较

采用三种方法提取大黄鱼肌肉基因组DNA,并以所提取的DNA为模板进行RAPD分析比较。结果表明,与传统方法、高盐抽提法相比,星普法具有快速简便、所需样品量少,所提取的DNA质量高等特点。三种方法所得的DNA分子量大小都在20kb以上,且RAPD扩增条带基本一致。     

大黄鱼基因组DNA的不同提取方法及RAPD扩增比较

采用三种方法提取大黄鱼肌肉基因组DNA,并以所提取的DNA为模板进行RAPD分析比较.结果表明,与传统方法、高盐抽提法相比,星普法具有快速简便、所需样品量少,所提取的DNA质量高等特点.三种方法所得的DNA分子量大小都在20kb以上,且RAPD扩增条带基本一致.     

华山松不同部位DNA提取方法比较研究

获得高质量的DNA通常是开展分子水平研究的关键一步.采用经典CTAB法、改良CTAB法、简易CTAB法、SDS微量法及Zigenhagen法对华山松的茎、叶及胚乳的DNA进行提取,并进行琼脂糖凝胶电泳检测、紫外分光光度计分析和标准差及标准误分析,结果表明:对于华山松针叶DNA提取,改良CTAB法提取DNA浓度适中,标准差和标准误最小,方法稳定性好;对于华山松茎段DNA提取,Zigenhagen法提取DNA浓度高,纯度好,标准差和标准误最小,方法的稳定性最好;对于华山松胚乳DNA提取,简易CTAB法提取的DNA浓度最高,纯度最好,标准差和标准误最小,方法的稳定性最好.这也说明对于同一植物的不同部位DNA的提取要采用不同的方法,需要在实践中加以摸索,获得最大的提取效果.     

南北五味子随机扩增DNA多态性(RAPD)指纹图谱研究

目的建立南北五味子随机扩增DNA多态性标记((random amplified polymorphic DNA,RAPD)指纹图谱,为南北五味子的鉴别提供可靠依据.方法采用CTAB法从不同产地的南北五味子样品中提取基因组DNA并纯化,将南北五味子基因组DNA进行随机DNA多态性扩增.结果北五味子和南五味子基因组DNA随机引物PCR扩增产物的差异以不同条带数目和条带亮度得已验证;同时体现出北五味子种内变异较小,南五味子种内变异较大.结论 RAPD技术为南、北五味子的鉴别提供一种简单、有效、可信度高的方法.     

沙葱总RNA的提取与质量分析

以沙葱种子和沙葱幼叶为材料,分别用RNAiso Plus试剂法、RNAiso Plus醋酸钠改进法、CTAB-异丙醇法、CTAB-LiCl法4种不同的方法提取沙葱总RNA,经琼脂糖凝胶电泳,采用紫外分光光度法测定总RNA纯度并进行RT-PCR检测.结果表明,沙葱不同组织总RNA提取的最优方法有所不同.采用CTAB-LiCl法能有效地提取出沙葱种子高质量、完整性好而且无胶状不溶物的RNA,没有明显的蛋白和基因组DNA的污染.采用RNAiso Plus醋酸钠改进法能有效地去除沙葱幼叶中多糖的干扰,所提取的RNA条带清晰,完整性好,是沙葱幼叶总RNA提取的有效方法.     

枣树基因组DNA提取方法及RAPD体系的建立

以8个枣树品种的嫩叶为材料,比较了不同的DNA提取方法,结果表明：采用改良的CTAB法提取的DNA纯度和产率,虽然不比改良SDS的高,但适宜RAPD分析．在20μL反应体积中,RAPD分析的优化反应体系为：引物0．2pmol·L^-1、Mg^2＋2．0mmol·L^-1、dNTP200μmol·L^-1、TaqDNA聚合酶1．2U．改良的CTAB法是枣树RAPD分析基因组提取DNA的最好方法．     

RAPD分子标记对高粱DNA经花粉管导入玉米自交系的验证

采用SDS方法纯化高粱总DNA,通过化粉管通道将高粱DNA转化P138、丹改340、7922、06NY-2、组3等5个品种的玉米自交系,后代的玉米种子经随机筛选后在实验室盆栽得到幼苗.使用不同序列的59条RAPD引物,对高粱基因组DNA和导入前后的玉米基因组总DNA进行PCR扩增.结果表明,其中9条引物在后代玉米和玉米原种之间具有RAPD差异,并证明了高粱DNA导入了4个玉米自交系,为今后的玉米自交系花粉管导入法育种的分子检验奠定了基础.     

新疆野生啤酒花DNA提取及RAPD反应体系的建立

采用2种方法提取啤酒花的基因组DNA,并分析了样品的不同状况和是否纯化对所提DNA质量及其RAPD扩增效果的影响。结果表明：采用改进的高盐低pH法优于CTAB法。以此法所提DNA为模板进行随机扩增多态DNA(RAPD)试验,分别测试了Mg2 ,dNTP、Taq酶、模板DNA浓度和退火温度对反应结果的影响,最终确定了野生啤酒花RAPD反应的最佳体系。     

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

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