N-(1,4-二取代吡唑基)-1,2,3-噻二唑酰胺类化合物的抗植物病毒活性研究

[目的]吡唑和噻唑类化合物是一类具有广泛生物活性的化合物,为了寻找到高活性的杂环酰胺类化合物,对此类化合物做进一步研究.[方法]对已合成的16个N-(1,4-取代吡唑基)-1,2,3-噻二唑酰胺类化合物分别进了抗烟草花叶病毒(TMV)和黄瓜花叶病毒(CMV)生物活性测试.[结果]初步生物活性表明,部分目标化合物在500 μg/mL浓度下对烟草花叶病毒(TMV)和黄瓜花叶病毒(CMV)有一定的治疗活性,其中化合物TM-1在浓度为500 μg/mL时,对TMV和CMV的治疗抑制率分别为41.75％和41.25％;化合物TM-13在浓度为500 μg/mL时,对CMV的治疗抑制率分别为45.72％,比对照药剂宁南霉素58.72％略低,具有进一步研究的价值.     

β-氨基丁酸诱导烟草抗烟草花叶病毒的研究

文章以云烟87为材料,研究了β-氨基丁酸(BABA)对烟草花叶病毒(TMV)的抑制效果和诱抗机理。结果表明,BABA处理提高了烟草对TMV的抑制率,降低了田间烟草花叶病毒病的发病率和病情指数,BABA与宁南霉素混合使用防治效果更好。BABA诱导水杨酸(SA)的增加和H2O2的积累,诱导PR1、PR3基因表达,同时检测到PR1蛋白的少量积累,说明BABA通过诱导烟草体内SA、H2O2的提高及PR蛋白的产生,有效抑制TMV的侵染,提高烟草抗烟草花叶病毒病的能力。     

鸦胆子素D对烟草抗烟草花叶病毒的诱导抗性和保护作用

为明确植物源抗病毒化合物鸦胆子素D(Bruceine D)对烟草抗烟草花叶病毒(Tobacco Mosaic Virus,TMV)的诱导抗性及其对TMV感染后的保护作用,本研究分别设置清水处理作为阴性对照,接种TMV作为阳性对照,检测施用Bruceine D对烟草体内过氧化物酶(POD)、多酚氧化酶(PPO)、苯丙氨酸解氨酶(PAL)以及超氧化物歧化酶(SOD)活性的变化,并检测了Bruceine D对烟草感染TMV后体内叶绿素、丙二醛(MDA)、可溶性糖和可溶性蛋白含量的影响,以及对烟草POD和PPO同工酶的诱导作用。结果表明,Bruceine D能够系统性地诱导烟草体内POD,PPO,PAL以及SOD活性的提高;能够抑制烟草因感染TMV造成的叶绿素含量的下降以及MDA含量的升高;诱导烟草产生新的POD和PPO的同工酶;阻止TMV造成的烟草体内可溶性糖和可溶性蛋白含量的降低。Bruceine D能够诱导烟草产生对TMV的抗性并对感染TMV的烟草起到保护作用。     

一种新型手性含苯并噻唑基团的β-氨基酸衍生物诱导烟草抗TMV作用的研究

通过半叶枯斑法筛选得到一个抗TMV具有较好活性的新型手性含苯并噻唑基团的β-氨基酸化合物A,western blot实验验证该化合物喷雾处理烟草叶片可诱导烟草获得对TMV的抗性。将该化合物手性拆分后,将相同浓度的不同构型化合物处理烟草K326,并测定体内防御酶系的变化。结果表明:所有构型的化合物处理烟草均能使宿主体内的PAL、POD、SOD活性不同程度提高,表明化合物可诱导烟草对TMV的抗性,提高烟草的免疫能力,同时不同构型对活性的影响不明显。     

烟草植株间传递的抗病化学信号物质研究

用Tenax作为吸附剂,通过吸附,热脱附的方法和GC－MS分析,测定了烟草幼苗在接种烟草花叶病毒（TMV）后产生的挥发物的组成变化,发现了多种与烟草感病过程密切相关的化合物,并对其中的化合物水杨酸甲酯（MeSA)进行了定量研究;实验表明,TMV接种后,MeSA的释放量从感病前低于1ng/(株．3h)增加到30ng/(株．3h)的水平,并能维持数天,经MeSA诱导处理的植株与对照植株相比MeSA的释放量平均增大了4倍,接种72h后枯斑平均直径减小了61％,表明该化合物是一种植株间传递的抗病化学信号物质。     

黄花软紫草的多糖成分及其抗病毒活性研究

采用水提醇沉法，提取黄花软紫草水溶性多糖，利用紫外-可见分光光度法、傅立叶变换红外光谱法和1-苯基-3-甲基-5-吡唑啉酮柱前衍生高效液相色谱(PMP-HPLC)法对其化学成分进行了分析.应用半叶枯斑法分析了黄花软紫草水溶性多糖抗烟草花叶病毒（TMV）活性.通过半叶枯斑法分析了其抗烟草花叶病毒（TMV）活性.结果表明，黄花软紫草水溶性多糖AG90的糖含量和蛋白质含量分别为81.0%和8.1%.红外光谱结果呈现明显的多糖特征吸收峰，结构为吡喃环.AG90是由6种单糖构成的水溶性杂多糖，组成单糖如下：甘露糖、鼠李糖、葡萄糖、半乳糖、木糖和阿拉伯糖.抗TMV结果显示，当AG90的浓度为500 mg/mL时，其抗TMV的保护、治疗和钝化活性均优于阳性对照药利巴韦林.     

库鲁木提草多糖成分及其抗病毒活性研究

采用热水提取、乙醇沉淀等方法制备新疆药用植物库鲁木提草的多糖,利用紫外和红外仪器、1-苯基-3-甲基-5-吡唑啉酮柱前衍生法等对其组成进行了分析.通过半叶枯斑法分析了其抗烟草花叶病毒(TMV)活性.库鲁木提草90%醇沉除蛋白部位多糖(HNP90)的糖含量和蛋白质含量分别为63.6%和2.98%.红外光谱结果显示,HNP90呈现明显的多糖特征吸收峰.单糖组成研究结果表明库鲁木提草多糖样品HNP90主要含有6种单糖.抗TMV结果显示HNP90的浓度为500 mg/mL时,其对感染TMV的保护、治疗和钝化活性,与对照药利巴韦林接近,具有显著的抗病毒活性.通过对新疆特色药用植物库鲁木提草多糖成分及其抗病毒活性进行研究,为库鲁木提草药用植物中多糖的开发和应用提供了参考.     

植物病毒病化学防治剂1,7-二(取代苯基)二乙撑三胺的结构改造

以对烟草花叶病毒 TMV具有较好抑制作用的 1, 7-二 (取代苯基 )二乙撑三胺为先导化合物,合成了 4个未见文献报道的新化合物,这些新化合物有一定的抗病毒活性,其中化合物 (2)的活性最高,对烟草花叶病毒的抑制百分率达到 55％ .     

芜菁花叶病毒崇明大白菜Y_(12)分离株的生物学鉴定

上海郊区青菜上流行的病毒病,经过近几年的研究,初步明确病毒主要属于以下三个类群:烟草花叶病毒(群)(TMV)、芜菁花叶病毒(T_PMV)和黄瓜花叶病毒(CMV).1980年前徐来升等已自青菜上分离出属于TMV群的长叶车前花叶病毒上海分离株(RMV(?));1980～1981年徐来升等又自崇明大白菜上分离出芜菁花叶病毒崇明分离株     

双抗转CP基因线辣椒对非克隆病毒的抗病性

本试验以转化黄瓜花叶病毒外壳蛋白基因 (CMV- CP)和烟草花叶病毒外壳蛋白基因(TMV- CP)的线辣椒纯合系作试材 ,比较了转化植株对接种 CMV非克隆株系后抗病性的变化以及转化植株对接种 PVX,PVY和 TEV等非克隆病毒后的抗病性变化 .结果表明 :转化线辣椒能抵抗 CMV非克隆株系的侵染 ,抗病表达特点为系统症状延迟出现 ,显症株率和病害严重度级别大幅度降低 ,接种叶片与新生叶片中的病毒含量明显减少 .对 PVX,PVY和 TEV等非克隆病毒也表达了相同的抗病特点     

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.     

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     

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

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