LAMP技术在转基因作物检测中的应用

环介导等温扩增技术（loop mediated isothermal amplification,LAMP）是一种新颖的等温核酸扩增技术。自问世以来,由于其方法操作简便,对仪器设备要求低,扩增效率高等优点,受到了学术界的高度关注。本文概述了LAMP技术在转基因作物检测中的应用．并展望LAMP技术的应用前景。     

罗非鱼无乳链球菌LAMP快速检测方法的建立

针对无乳链球菌高度保守的表面免疫相关蛋白基因,采用环介导等温扩增技术(LAMP),设计4条特异性引物,优化反应体系,建立罗非鱼无乳链球菌快速诊断方法.研究结果表明,LAMP方法检测灵敏度达到30 CFU·m L-1,且对2株罗非鱼源无乳链球菌均能扩增出特异性片段,而对14株非无乳链球菌均未扩增出相应片段.建立的LAMP检测方法具有高度的特异性和灵敏性,反应在1 h内完成,为罗非鱼无乳链球菌病的快速诊断提供了一种重要的技术手段.     

食品中沙门氏菌LAMP快速检测方法的建立

食品及其原料中沙门氏菌的快速、现场检测对食品安全控制具有重要意义.根据沙门氏菌invA基因核苷酸序列设计一组引物,应用环介导等温扩增技术（LAMP）,分别对7种不同血清型沙门氏菌和4种非沙门氏菌进行扩增,同时建立沙门氏菌人工污染的食品模型,比较了LAMP法与活菌计数检测的敏感性.结果表明,该方法仅对沙门氏菌产生特异性扩增,灵敏度高达336,mL-1,食品样品经细菌富集培养后,检测灵敏度高达8.25,g-1.所建立的检测沙门氏菌方法具有较高的特异性与灵敏性,操作简单、快速,可用于沙门氏菌污染食品的快速检测.     

环介导等温基因扩增技术在林木病害检测中的应用展望

森林病害主要是由病毒、细菌、真菌和寄生性生物引起的,其中真菌所致病害种类最多,约占森林病害的80%以上。环介导等温基因扩增(LAMP)技术是一种快速高效的DNA扩增方法,具有简单、快捷、特异性强、准确性高等特点,笔者论述了LAMP技术的原理及其在病毒、细菌、真菌和寄生性生物等方面的应用及研究。该技术广泛应用于食品、临床、环境、农业、工业和畜牧业等领域。环介导等温扩增技术为快速分子检测提供了一条新的途径,在林木病害检测领域将会有广阔的应用前景。     

猪瘟强毒株与兔化弱毒疫苗株的LAMP鉴别检测

为了鉴别猪瘟病毒（CSFV）野毒感染和疫苗接种,系统比较分析CSFV标准强毒株、疫苗株、不同基因亚型的野毒株的全基因组序列差异,设计一套分别针对猪瘟强毒与弱毒NS5B基因的环介导等温扩增（LAMP）引物,建立特异性的猪瘟强毒株与疫苗株的LAMP检测方法.LAMP扩增产物用罗丹明B指示剂或者琼脂糖凝胶电泳进行检测.该方法特异性好,比RT-PCR灵敏度高出1 000倍,且重复性稳定性良好,为快速准确地鉴别CSFV野毒感染和疫苗接种提供了有效的方法.     

环介导等温扩增技术检测乳粉中肺炎克雷伯菌

以荚膜脂多糖(capsular polysaccharide,CPS)合成调控子resA为靶基因片段,设计了肺炎克雷伯菌特异性引物,建立了环介导恒温扩增技术(Loop-Mediated lsothermal Amplification,LAMP)检测方法.结果表明,3对LAMP引物对肺炎克雷伯菌不仅有菌种专一性,而且,具有相当高的灵敏度(2 CFU/100 g).因此,该方法有利于更快更准确的鉴定食品中肺炎克雷伯氏菌.     

环介导等温扩增技术的研究进展

环介导等温扩增技术(Loop-mediated isothermal amplification method,LAMP)是一门新兴的基因扩增技术,作为一种分子生物学检测技术,具有高特异性、高敏感性、简单、便捷及成本低的特点,已广泛用于临床疾病的诊断、流行性细菌或病毒的定性定量检测、动物胚胎性别鉴定及基因芯片开发等领域...     

LAMP法鉴定家鸡性别的初步研究

为建立一种利用环介导等温扩增（LAMP）技术高效快速鉴定家鸡及早期胚胎性别的反应体系,本研究以W染色体上假基因序列EE 0.6序列为模板,设计LAMP引物,对反应温度、反应时间、Mg2＋浓度、dNTP浓度等条件进行优化.结果表明,在25μL反应体系中,Mg2＋终浓度为6 mmol/L,dNTP终浓度为1.5 mmol/L,63℃反应60 min时为最佳反应体系.在该反应体系下,LAMP成功地鉴定出家鸡性别的雌雄,准确率达到100%.此方法将成为一种快速有效地鉴定家鸡早期胚胎性别的新方法,且可以在生产实践中广泛推广应用.     

禽源沙门氏菌不同检测方法的比较及分型研究

本研究采集同一地区三家规模化蛋鸡场的饲料、肛拭子和病死鸡样品共813份,分别采用本实验室改进的环介导等温扩增技术(LAMP)、普通PCR技术以及美国农业部沙门氏菌分离培养标准(USDA MLG 4.05)进行沙门氏菌检测,并对分离株进行血清型鉴定及ERICPCR分型.结果,三种方法均检出沙门氏菌阳性16份,检出率同为1.97%.其中病死鸡、饲料和肛拭子中检出率分别为11.29%、3.03%和1.02%.16株禽源沙门氏菌中有7种血清型,其中12株沙门氏菌ERIC-PCR分型相似性均小于90%.结果表明,本实验室改进的LAMP方法与PCR方法检出率相同,与USDA MLG 4.05的符合率为100%.16株沙门氏菌血清型多样,分子分型的相似度低.     

用LAMP法快速鉴别熟制牦牛肉饼中的猪肉和鸡肉成分

旨在建立一套LAMP体系对牦牛肉饼中掺杂的鸡肉和猪肉进行鉴定和检测.以牦牛、鸡和猪为研究对象,分别对牦牛的16S rRNA、鸡的12S rRNA和猪的12S rRNA-tRNA Val设计3组引物.通过模拟制作牦牛肉饼加工条件后,从肉饼中提取的DNA,进行LAMP扩增和电泳.结果表明,所设计的引物只能在对应的肉制品中扩增出目的条带,该法具有较高的特异性,可用于混合的生鲜牦牛肉或牦牛肉品中的动物源性成分的鉴定.将鸡肉和猪肉分别按一定的比例混合到牦牛肉中制成牦牛肉饼,采用建立的LAMP体系对其进行掺杂检测,鸡肉的检出限为0.25%,猪肉的检出限为0.125%.该方法在肉品的鉴别上具有简单、快速和特异性强的特点,在为熟肉制品种类来源的检测提供了新方法.     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has