Cd^2＋对石龙尾的色素,O^—2及脂类过氧化物含量的影响

研究了Ｃｄ＾２＋对石龙尾的毒害效应。结果表明：石龙尾的的受害程度随溶液中Ｃｄ＾２＋浓度升高和处理时间的延长而加深;叶绿素含量及叶绿素ａ／ｂ比值经低浓度Ｃｄ＾２＋短时间处理会出现升高现象,随着Ｃｄ＾２＋处理浓度的增大及处理时间的增长,又呈下降趋势Ｏ＾－２、ＭＤＡ含量也出现类似情况,只是曲线稍迟一点。而花青素出现一路下降趋势。     

Cd(Ⅱ)离子对石龙尾生理生化特性的影响

研究了Cd(Ⅱ)离子对水生植物石龙尾生理生化特性的影响，包括可溶性蛋白含量和活性氧清除系统的活性(SOD、POD、CAT)．实验结果显示，受重金属Cd(Ⅱ)离子的影响，在低浓度Cd(Ⅱ)离子溶液处理下，石龙尾的可溶性蛋白含量微量上升，O2^-的含量、SOD的活性和比活性及CAT的活性皆有应激性升高，但随着Cd(Ⅱ)离子处理浓度的升高，超过它们的耐受阈值又呈下降趋势，POD的活性则呈持续上升趋势．     

湘鄂西地区下寒武统石龙洞组古岩溶发育及储层特征

 四川盆地下寒武统龙王庙组天然气勘探近期取得的重大发现,引起了对同期沉积的石龙洞组的广泛关注。通过对鄂西渝东-湘鄂西地区石龙洞组多个野外露头的研究,观察到在平面上石龙洞组顶部存在典型的风化岩溶现象,推测在该区内存在与早寒武世末兴凯运动有关的区域性岩溶不整合面。以湖北恩施咸丰背斜庙梁子-丁寨剖面为例,石龙洞顶部的表层岩溶带厚度为3 m,主要为风化壳层和垮塌角砾岩层。同时,受大气淡水和裂缝影响,表层岩溶带下部地层在较深范围内都受到大气淡水淋滤作用影响,属于岩溶改造带。根据胶结物类型及溶蚀特征可分为大气淡水垂向渗滤溶蚀区及潜流溶蚀区。此外,初步探讨了表生岩溶与储层发育的关系。研究区整体岩性较致密,但局部存在优质储层,尤其是表层岩溶带孔洞发育十分丰富,连通性良好。而岩溶改造带由于后期埋藏阶段成岩作用的影响,尤其是晚期硅化作用的破坏,现存孔洞相对较少。研究区优质储层的形成主要受表生及埋藏期溶蚀作用和白云化作用控制。     

中国石龙子消化道内容物中微生物的初步研究

从中国石龙子（Ｅｕｍｅｃｅｓ ｃｈｉｎｅｎｓｉｓ）胃、小肠和大肠中分离出的细菌包括枸橼酸杆菌属的弗劳地枸橼酸杆菌（Ｃｉｔｒｏｂａｃｔｅｒ ｆｒｅｕｎｄｉｉ）和异型枸橼酸杆菌（Ｃｉｔｒｏｂａｃｔｅｒ ｄｉｖｅｒｓｕｓ）、变形杆菌属的奇异变形杆菌（Ｐｒｏｔｅｕｓ ｍｉｒａｂｉｌｉｓ）、肠杆菌属的阴沟肠杆菌（Ｅｎｔｅｒｏｂａｃｔｅｒ ｃｌｏａｃａｅ）、芽孢杆菌属的枯草芽孢杆菌（Ｂａｃｉｌｌｕｓ ｓｕｂｔｉｌｉｓ）、葡萄球菌属的表皮葡萄球菌（Ｓｔａｐｈｔｌｏｃｏｃｃｕｓ ｅｐｉｄｅｒｍｉｄｉｓ）和类杆菌属普通类杆菌（Ｂａｃｔｅｒｏｉｄｅｓ ｖｕｌｑａｔｕｓ）．细菌在胃、小肠和大肠中分布数量为３．４２ｘ１０~６、２． ０４ ｘ １０~６和 １． １１ｘ １０~９．弗劳地枸橼酸杆菌为优势菌群．分离出的霉菌属于青霉属（Ｐｅｎｃｉｌｌｉｕｍ）、曲霉属（Ａｓｐｅｒｇｉｌｌｕｓ）和毛孢子菌属（Ｔｒｉｃｈｏｓｐｏｒｏｎ）,主要是青霉属。在胃、小肠和大肠中霉菌的数量分别是２．１９ｘ１０~４、１．６７ｘ１０~４和１．６１ｘ１０~４,酵母菌和放线菌都未发现．     

中国石龙子消化道内容物中微生物的初步研究

从中国石龙子（Eumeceschinensis）胃、小肠和大肠中分离出的细菌包括枸橼酸杆菌属的弗劳地枸橼酸杆菌（Cirrobacterfreundii）和异型构枸橼酸杆菌（Citrobacterdiversus）、变形杆菌属的奇异变形杆菌（Proteusmiralelis）、肠杆菌属的阴沟肠杆菌（Enterobactercloacae）、芽孢杆菌属的枯草芽孢杆菌（Bacillussubtilis）、葡萄球菌属的表皮葡萄球菌（Staphylococcusepidermidis）和类杆菌属普通类杆菌（Bacteroidesvulqatus）．细菌在胃、小肠和大肠中分布数量为3．42×106、2．04×106和1．11×109．弗劳地枸橼酸杆菌为优势菌群．分离出的霉菌属于青霉属（Pencillium）、曲霉属（Aspergillus）和毛孢子菌属（Trichosporon）,主要是青霉属．在胃、小肠和大肠中霉菌的数量分别是2.19×104、1．67×104和1．61×104,酵母菌和放线菌都未发现．     

内蒙古种子植物新纪录分类群

本文记载了内蒙古种子植物新记录科2个:沟繁缕科Elatinaceae和胡麻科Pedaliaceae;新纪录属5个:沟繁缕属Elatine、茶菱属Trapella、丁香蓼属Ludwigia、石龙尾属Limophila和水竹叶属Aneilema;新纪录种12个,为内蒙古植物区系的研究增添了新资料。     

衢州中国石龙子形态特征和雌体繁殖输出

通过报道浙江衢州中国石龙子成体形态特征的两性异形和雌体繁殖输出，测定了雌雄两性个体的体长、体重、头长和头宽、附肢长和腹长，除腹长无显著两性差异外，其他形态特征均表现为雄性个体大于雌性个体。衢州种群雌体年产单窝卵，平均窝卵数，窝卵重和平均卵重分别为16．8，8．767g和0．589g．     

关于次指数族的两个性质

研究了次指数族的两个非常重要的性质，即可积尾性质和尾等价性质．     

石龙芮对含铁废水的净化研究

园林水体由于受到金属或有机物污染,水质逐渐恶化.文章探讨了沟渠中常见植物石龙芮(Ranunculus scelera-tus L.)对Fe2 的富集和净化及植体内叶绿素含量、过氧化氢酶活性(CAT)和质膜透性的变化.结果表明,石龙芮在含低浓度Fe2 时,叶绿素含量和CAT活性增加,质膜透性未发生显著的变化,含低浓度Fe2 对植物的生长有利;随石龙芮对Fe2 富集量的增加,在表现出较强的富集能力的同时,由于植体内自由基含量的增加导致CAT活性下降和质膜透性增大,植体受一定的胁迫伤害。     

北草蜥和中国石龙子主要储能部位的比较研究

研究了北草蜥和中国石龙子的主要储能部位。两种爬行动动物育肥和禁食个体的腹脂肪体能值、肝脏能值、尾能值及去尾躯干能值的组间差异显著;北草蜥腹脂肪体、肝脏和尾的能量动用活跃,是该种动物主要的储能部位;中国石龙子腹脂肪体、肝脏、尾和去尾躯干是该种动物的主要储能部位,两种动物主要储能部位无明显差异,育肥可使动物各储能部位迅速储存能量。     

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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