盐田藻垫的分布和生长规律及其意义

讨论藻垫的组成及其在不同纬度、盐度的分布，对各种类型的藻垫随纬度、盐度的季节性变化规律进行初步分析，并从生态学角度讨论了这种变化的原因，及其对生产工艺的要求和在盐田生态管理上的意义。     

发展人工藻垫的重大意义

国家自然科学基金资助的一个发展人工藻垫的计划在山东省广饶盐场得以实施,历时３年时间的培育,人工藻垫发育的厚度达２．５ｃｍ。试验池底发育在藻垫中和氧化还原梯度相关的沉积微带对矿物离子的转移和固定具强的影响,由于有机和无机的沉积物及藻垫有机质与沙粒、粘土的束缚粘结,致使土壤的渗漏减少６０％～８４％。所以藻垫在防渗和卤水净化中的作用对海盐生产是非常重要的。     

盐田刚毛藻的营养成分分析

应用生化技术对盐田刚毛藻的营养成分进行分析，结果表明盐田刚毛藻是一种优良饲料．     

盐藻尿苷二磷酸葡萄糖脱氢酶(DsUGD)基因的功能预测

盐生杜氏藻（Dunaliella salina）具有极强的耐盐性，藻体含有大量的胡萝卜素、蛋白质以及多糖类化合物．目前，已有研究报道指出蓝藻多糖是其适应高盐、高碱等环境的重要因素；而盐藻多糖的作用尚未见相关研究．尿苷二磷酸葡萄糖脱氢酶（UDP-glucose dehydrogenase，UGD，EC1．1．1．22）是多糖合成中的一个关键酶，它催化产生的UDP-葡萄糖醛酸是多糖合成中的关键前体物质．在微生物中，该酶参与到荚膜多糖的合成，是其致病性原因所在；在高等植物中，UGD参与到半纤维素的合成，与植物细胞壁形成密切相关．盐生杜氏藻是一类低等光合植物，它没有细胞壁和荚膜，因此关于UGD在该物种中的作用有待进一步研究．     

十种（株）杜氏藻β－胡萝卜素的提取及含量比较

建立了从杜氏藻鲜藻中直接提取、纯化β－胡萝卜素及快速检测其含量的新方法，发现在十种（株）杜氏藻Ｄｕｎａｌｉｅｌｌａｂａｒｄａｕｉｌ中生成β－胡萝卜素的量最高，达藻干重的４．１９％，在最佳条件下可达１３％，经动物急性毒性实验测得小鼠对杜氏藻β－胡萝卜素的最大耐受量＞２４０ｍｇ·ｋｇ￣（－１）．     

香菇多糖口服液缓解小鼠体力疲劳的功能检测

目的：检测香菇多糖口服液是否有缓解小鼠体力疲劳的功能．方法：通过热水抽提、乙醇沉淀等方法制备香菇多糖,用18％橙汁、4％砂糖、0．2％柠檬酸、0．15％稳定剂CMC溶剂配制不同计量口服液,给小鼠灌胃,对照组为生理盐水．30d后比较各组小鼠体质量、负重游泳时间、血清尿素氮、血乳酸浓度及肝糖原水平的变化．结果：与对照组相比,2．25r,／kgBW剂量组香菇多糖口服液能显著延长小鼠的负重游泳时间（P〈0．01）,增加肝糖原的储备量（P〈0．01）,降低血乳酸水平（P〈0．01）,降低运动后血清尿素氮的增量（P〈0．05）,1．13g／kgBW剂量组香菇多糖口服液能延长小鼠的负重游泳时间（P〈0．05）,降低血乳酸水平（P〈0．05）,降低运动后血尿素氮的增量（P〈0．05）,结论：香菇多糖口服液具有抗疲劳生理活性．     

川蔓藻水浸提液的克藻效应与机理

采用普通小球藻在不同浓度的川蔓藻水浸提液中纯培养的方法，研究了川蔓藻对普通小球藻的克藻效应与机理、结果显示，川蔓藻的水浸提液对普通小球藻的抑制作用显著并具有浓度效应、96h的抑制率与浸提液浓度的对数线性相关．半抑制浓度（IC50）为6．332g（dw）／L．川蔓藻的水浸提液使藻细胞内丙二醛的含量急剧增高，并显鲁改变了藻细胞外可溶性蛋白和多糖的比值、透射电镜观察显示，川蔓藻的水浸提液主要损伤藻细胞的膜系统,川蔓藻水浸提液对普通小球藻的抑制机理为：损坏藻细胞的膜系统和改变胞外聚合物的含量，从而增加小球藻表面的疏水性，最终藻细胞絮凝沉降死亡.     

Co、Ni、Cu、Zn离子对蓝藻藻胆体光谱影响研究

应用吸收光谱和荧光光谱的方法研究了Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）和Ｚｎ（Ⅱ）４种重金属离子对螺旋藻及其藻胆体—类囊体膜的作用．４种金属离子可降低藻胆体在６２４ｎｍ的特征光吸收峰，并使藻胆体—类囊体膜的发射荧光峰下降、蓝移，使Ｆｐ／Ｆｃ（藻胆与叶绿素荧光比值）升高．这些结果表明，藻胆体是重金属离子作用的重要位点这一．在四种重金属中，Ｃｕ（Ⅱ）的作用最强．     

十种（株）杜氏藻β—胡萝卜素的提取及含量比较

建立了从杜氏藻鲜藻中直接提取，纯化β－胡萝卜素及快速检测其含量的新方法，发现在十种（株）杜氏藻Ｄｕｎａｌｉｅｌｌａ ｂａｒｄａｕｉｌ中生成β－胡萝卜素的量最高，达藻干重的４．１９％，在最佳条件下可达１３％，经动物急性毒实验测得小鼠对杜氏藻β－胡萝卜素的最大耐受量＞２４０ｍｇ．ｋｇ＾－１．     

蒜头藻脂肪酸在河蟹育苗过程中的传递

采用经蒜头藻（Monodus subterraneous）强化的褶皱臂尾轮虫（Brachionus plicatilis，以下简称轮虫）投喂中华绒螯蟹（俗称河蟹）涵状幼体，并对不同密度轮虫的投喂效果以及蒜头藻中的二十碳五烯酸（EPA）、二十二碳六烯酸（DHA）等高度不饱和脂肪酸（HUFA）在育苗过程巾的传递进行了探讨．结果显示：轮虫经72h强化，EPA、DHA含量达到最高值，从0分别提高到7．82％和1．80％．以幼体的变态率和存活率为评判指标。发现在潘状Ⅱ期，轮虫最适投喂密度为20ind／mL；在涵状Ⅲ期，轮虫最适投喂密度为30ind／mL．由强化轮虫喂养得到的z4的EPA、DHA含量分别是12．76％、5．61％，显著高于由未强化轮虫喂养得到的Z4．表明蒜头藻的脂肪酸，特别是EPA、DHA在育苗过程中能通过食物链有效地传递给滏状幼体．     

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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