稀脉浮萍6746光周期诱导开花过程中几种同工酶的变化及其与开花的关系

短日植物稀脉浮萍6746一般需要4个光周期诱导而开花。在4天的SD诱导中过氧化物酶活性明显增加,诱导4天时酶活性出现高峰,接着逐渐降低。诱导结束后2天到开花酶活性变化不大。SD诱导2天时,过氧化物同工酶出现两条新酶带。诱导4天时新带活性增强,从诱导结束后2天到开花,新酶带逐渐减弱,而后消失。酯酶同工酶和酸性磷酸酯酶同工酶在SD诱导3天时分别出现1条和2条新带,诱导4天后逐渐减弱,开花时消失。     

酵母寡糖素对丹参发根细胞悬浮培养中生理特性研究

本实验研究了从酵母细胞壁中提取寡糖素诱导丹参发根培养细胞后，过氧化物酶活性和同工酶谱的变化。结果表明，诱导后过氧化物酶活力显提高，过氧化物酶同工酶电泳出现新的谱带，原有的某些谱带增强。     

吲哚乙酸氧化酶和过氧化物酶关系的同工酶研究

用细胞质雄性不育系小麦和普通小麦中国麦与鄂恩１号为材料，用Ｄａｖｉｓ和Ｒｅｉｓｆｅｌｄ不连续聚丙烯酰胺垂直析以凝胶电泳技术进行吲哚乙酸氧化酶和阴、阳离子过氧化物酶同工酶分析，并用ＳＣ９１０型双波段薄层扫描仪进行扫描，记录其谱带数及强弱，结果表明阳离子过氧化物酶同工酶谱与ＩＡＡ－氧化酶同工酶谱十分相似，而阴离子过氧化物酶酶谱相差甚远，由此表明具有吲哚乙酸氧化酶活性位点的过氧化物酶，应主要是阳离子过氧     

槐胚乳半乳甘露聚糖积累过程中过氧化物酶同工酶的分析

槐开花后约６０ｄ至种子成熟，为胚乳细胞半乳甘露聚糖积累期。利用聚丙烯酰胺凝胶电泳技术分析了比较胚乳细胞半乳甘露聚积累过程中过氧化物酶同工酶谱。结果表明，胚乳细胞壁上半乳甘露聚糖积累时，过氧化物酶活性较低，同工酶谱带较多；反之，半乳甘露糖降解时，过氧化物酶活性增高，同工酶谱带减少。     

铝对大豆过氧化物酶同工酶谱的影响

采用聚丙烯酰胺凝胶电泳,研究了3个大豆品种在铝毒害下过氧化物酶(POD)同工酶在不同时期的变化情况.结果表明,随着铝浓度的增加,不同品种大豆的过氧化物酶同工酶的酶活性和酶带数量变化不一,其中大豆9703的过氧化物酶同工酶的酶带数和酶活性明显下降,浙春3号大豆的变化不明显,浙春2号大豆的明显增加,这与各品种对铝毒胁迫的抗性密切相关.     

水稻细胞质雄性不育系小孢子发育过程中的同工酶分析

以新选育出的籼型水稻细胞质雄性不育系马协Ａ有其相应保持系马协Ｂ为材料,分别取不育系和保持系处于花粉母细胞形成期、减数分裂４分体时期、单核期、２核期、３核期的花药进行过氧化物酶同工酶、细胞色素氧化酶同工酶电泳分析及酶活性测定分析。不育系与相应保持系比较发现,不育系过氧化物酶同工酶电泳酶谱带型丰富,酶活性较高;细胞色素氧化酶同工酶电泳酶电泳酶谱带型较小,酶活性较低。这现象是从单核期花药开始表现,并随发     

三粒小麦和普通小麦种胚萌发初期过氧化物酶及同工酶变化的比较

本文比较分析了三粒小麦和普通小麦种胚萌发初期过氧化物酶活性和同工酶的变化及其对放线菌素D(AMD)和环已亚胺(CHM)的敏感性。结果表明,三粒小麦的酶活性显示单峰曲线,AMD和CHM分别抑制其酶活力的5％和24％左右。普通小麦的酶活性显示V形曲线。AMD和CHM分别抑制其酶活力的34％和67％。 两种小麦的同工酶酶谱明显不同,AMD的抑制效应均不明显,但CHM对三粒小麦的过氧化物酶同工酶抑制较强。     

水稻“滇榆一号”不同生育期及不同时期施穗肥后叶片过氧化物酶活性及其同工酶的变化

水稻滇榆一号不同生育期及不同时期施穗肥后,叶片过氧化物酶活性不同,但酶活性曲线都近呈w形。开花期,对照植株叶片的过氧化物酶活性最高,施大量基肥的植株叶片过氧化物酶活性最低,晚期施穗肥的植株叶片的酶活性稍低于对照株,早期和中期施穗肥的植株叶片酶活性介于前两者之间,不同时间施穗肥后,在开花期叶片过氧化物酶同工酶谱中出现两条新酶带。     

贮存时间对春小麦种子某些生化性质的影响

本文对贮存二年和十四年的八个春小麦品种进行了蛋白质和丙二醛含量、α—淀粉酶、过氧化物酶、酯酶同工酶及其酶活性的分析比较,分析结果表明:贮存十四年的种子其蛋白质含量,α—淀粉酶与过氧化物酶的活性都有明显的降低。过氧化物酶、同工酶酶谱差异较明显。α—淀粉酶有4—5条同工酶带,且均为阴极酶带。贮存时间长的种子丙二醛的含量较高。酯酶同工酶酶谱的差异则主要在慢带区表现出来。     

乌麦萌发前后抗氧化酶的研究

较系统地研究了乌麦萌发前后过氧化物酶(POD)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)等几种抗氧化酶活性的变化，同时利用聚丙烯酰胺凝胶电泳对几种抗氧化酶进行了同工酶分析，结果显示：乌麦萌发前后，几种抗氧化酶活性均有显变化，且与对照小麦有明显差异，乌麦萌发前后POD同工酶谱的变化显，且与对照小麦的差异性大，SOD同工酶谱的变化及与对照小麦的差异性不明显。     

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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