778诱导剂对植物生长状况及抗冷性变化的影响

经不同质量浓度的778诱导剂处理过的2个水稻品种(丽粳2号,十和田),在(25±1)℃,2 500 lx的温箱中生长到二叶期的结果:质量浓度为33.33 g/L的抑制水稻的生长,25.00 g/L的为水稻生长的最适浓度.在二叶期水稻的叶片上喷洒相应质量浓度的试剂,置于低温(0±1)℃,4 d,恢复1 d后,统计存活率.经质量浓度为33.33 g/L的试剂处理过的幼苗存活率最高.抗冷品种(丽粳2号)各质量浓度下的水稻幼苗的存活率均高于不抗冷品种.西双版纳香荚兰种植基地的香荚兰在遭受了前后2次(0±1)℃天然冻害后,在恢复生长过程中,对其分别给予了778诱导剂,BR-120的喷洒处理.通过对不同部位香荚兰叶片的超氧化物岐化酶(SOD)、过氧化物酶(POD)活性的测定发现,低温胁迫后的香荚兰植株,喷洒了BR-120和778诱导剂的植株,叶片中的SOD,POD酶活性均高于对照植株.     

荒漠植物蒙古扁桃的抗氧化胁迫性研究

研究了荒漠植物蒙古扁桃幼苗的抗氧化胁迫性．实验结果表明。经3d干旱胁迫处理后，蒙古扁桃幼苗的SOD和POD活性增加，CAT活性下降，发生了不同程度的膜脂过氧化．MDA含量增加,认为在蒙古扁桃活性氧代谢平衡中。SOD和POD起主要作用，且干旱胁迫抑制了蒙古扁桃幼苗的IAA氧化酶活性．     

脱落酸对檀香幼苗生长、光合及叶片 抗氧化酶活性的影响

为了探讨脱落酸对檀香幼苗生长的影响,以半年生檀香幼苗为试材,研究了盆栽条件下叶面喷施不同质量浓度脱落酸(ABA)(0、1、10、100 mg/L)对檀香幼苗生长、光合特性及抗氧化酶活性等生理指标的影响。结果表明:较低质量浓度的脱落酸(1 mg/L)可以显著增强檀香幼苗的苗木质量指数(QI),提高叶片的净光合速率(P_n)、气孔导度(G_s)、蒸腾速率(T_r)、和叶绿素a(Chl a)含量,降低叶片中丙二醛(MDA)含量; 较低浓度的ABA处理后叶片中超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)的活性均有所提高,檀香幼苗的生物量积累也得到增加。随着ABA施用量的增加(10～100 mg/L),檀香幼苗生物量、QI、P_n、Chl a含量等均降低,抗氧化物酶活性下降,幼苗生长在一定程度上受到抑制。结果说明:低浓度的外源ABA可通过提高檀香幼苗叶片抗氧化酶活性来降低膜脂过氧化,通过增加光合作用来提高檀香幼苗的长势和生物量积累,使苗木质量指数显著增强; 实验验证以1 mg/L的ABA处理效果最好。     

不同光照对喜树细胞培养生长和生理生化特性的影响

以喜树（Camptotheca acuminata Decsne.)幼嫩叶片为材料，在附加0.5mg/L 2,4-D、1.0mg/L NAA和0.5mg/L KT的B5培养基上诱导形成愈伤组织，在愈伤组织培养过程中，用5种不同光质处理（黑暗为对照），结果表明，不同光质对生长有不同效应，绿光对愈伤组织生长有促进作用，而蓝光则有抑制作用；在光照和黑暗两种培养条件下，可溶性蛋白质含量、过氧化物酶（POD）、超氧化物歧化酶（SOD）、酯酶（ES）的活性变化均出现两个峰值；同时，电泳分析结果表明，酸性蛋白质组分、过氧化物同工酶谱均有明显的变化，与愈伤组织生长呈正相关。     

水涝胁迫下欧李SOD和POD的变化

通过盆栽实验法,测定水涝条件欧李SOD和POD酶的活性的关系,考察SOD、POD抗氧化酶系统在欧李抗涝生理研究中的作用.采用邻苯三酚自氧化法对叶片中SOD的活性进行测定;采用愈创木酚法对叶片中POD酶活性进行测定.实验结果表明,欧李在水涝胁迫下,植物体内的SOD酶活性大量降低而POD酶适量地增加;一段时间后,SOD酶不降反增而POD酶活性降低;实验后期SOD酶和POD酶都同时呈现了下降趋势,最后趋于稳定.水涝虽会对欧李的生理状态产生一定影响,但结果表明欧李在短期水涝胁迫下有较强的适应能力.     

SOD模型化合物（MSOD）对几种蔬菜抗氧化酶活性，叶绿素及脯氨酸含量的影响

用一定浓度的SOD模型化合物(0．015‰)以喷洒方式处理田间几种蔬菜(茄子、三叶芹、辣椒、甘蓝、花菜、黄瓜等)。取其叶片。分别测定了抗氧化酶系统中的超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性、叶绿素的含量及细胞内游离脯氨酸的含量．其结果表明，不同的蔬菜品种、同一品种不同生长时期，抗氧化酶系统中的几种酶活性表现不一致．同时也发现MSOD对叶绿素的合成、脯氨酸在细胞内的含量均有一定的影响．     

TS制剂对桑树萎缩病的防治机理

用植物病毒防治剂－ＴＳ制剂喷洒感病桑树植株后,用聚丙烯酰胺凝胶电泳对叶片多酚氧化酶、过氧化物酶进行同功酶比较,发现处理株多酚氧化酶的酶带数和对照株相同,均为４条,但酶带位置、强弱有差异;处理株过氧化物酶有４条基本酶带,而对照株有３条酶带,处理株出现一条新酶带。处理株多酚氧化酶活性感病后期比感病初期提高１．６倍,对照株酶活性提高１倍,而过氧化物酶活性感病后期比感病初期提高１．６倍,对照株酶活性提高１     

高压静电场对舟山春兰愈伤组织生长的影响

舟山春兰Cymbidium goeringii经高压静电场(HVEF)处理后,超氧化物歧化酶(SOD)活性、蛋白质及糖含量增加,过氧化物酶(POD)和吲哚乙酸(IAA)氧化酶活性下降,最终使愈伤组织生长速率提高。实验表明,高压静电场处理可促进舟山春兰愈伤组织的生长,与HVEF影响体内SOD、POD和IAA氧化酶活性以及蛋白质和糖含量的变化相关。     

RE包衣剂对玉米生长及苗期抗旱性的影响

用高效成膜剂携带植物生长调节物质及酶活性物质包衣玉米种子，干后播种，结果表明适当深度的ＲＥ包衣处理提高玉米苗叶绿素含量，抑制地上生长，促进根系生长，提高根冠比，经士旱处理，玉米苗保护酶（ＳＯＤ、ＣＡＴ）活性上升，而ＰＯＤ活性下降，ＭＤＡ含量下降，Ｐｒｏ含量上升，ＲＥ包衣处理表现了壮苗、抗旱的作用。     

激光照射对冬小麦幼苗生长及过氧化物酶同工酶的影响

本文研究了激光照射对冬小麦萌发、幼苗生长及过氧化物酶同工酶的影响。结果表明：用激光照射冬小麦种子，能够显著地提高种子发芽率和幼苗前期生长速度。此外，激光照射不同程度地抑制了主胫根的生长，但对侧根的影响不甚明显。过氧化物酶同工酶（ＰＯＤ）的分析结果显示出，芽鞘与主胚根ＰＯＤ同工酶谱带的变化规律一致，即激光照射１ｍｉｎ后ＰＯＤ同工酶谱带数减少，２ｍｉｎ后，ＰＯＤ谱带数则增加。     

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