高盒形藻的有性生殖发生

从厦门沿岸分离高盒形藻，培养观察其有性生殖发生．该藻在光诱导下每天发生一次性分化，每次持续４ｈ．从海区采样观察和实验室培养，性分化在６２μｍ以下宽度的细胞中发生．每个精原孢囊产生１２８个单鞭毛精子，精子生活１９ｈ之后存活率大大下降，每个卵囊形成成对的卵子，精子和卵子几乎同步发生．结果表明，该藻可能存在小型和中型细胞分段发生性化和两次细胞复大现象．生殖中呈现的相似和相异特征，显示种间的亲缘关系．     

柳毒蛾核型多角体病毒内蒙株的形态学研究

从内蒙古太仆寺旗自然死亡的柳毒蛾虫尸中分离提纯多角体。其平面图呈不规则形状，有三角形、四￣六边形和近圆形。大小相差悬殊，直径在０．９４￣２．４７μｍ之间，约有５６．４％的多角体在１．６０￣２．１０μｍ之间，平均为１．７８μｍ。多角体硷解后释放出短杆状病毒束，大小为２０４￣４１６ｎｍ×１０４￣２９４ｎｍ之间，有４２％的病毒束在３４５￣３６５ｎｍ×１６１￣１８５ｎｍ之间，平均为３５８×１７０ｎｍ。约７     

广西英罗湾红海榄红树群落锰镍元素的累积和循环

探讨了广西英罗湾红海榄红树林Ｍｎ、Ｎｉ元素的累积和生物循环，结果表明：红海榄植物体不同部位Ｍｎ、Ｎｉ元素的含量范围，分别为６．５６～４７．９和０．２７～２．８９μｇ／ｇ。该群落Ｍｎ，Ｎｉ元素的现存储量分别为４３０．３９和３０．８８ｍｇ／ｍ￣２．林地残留物Ｍｎ、Ｎｉ储量分别为１７７６．９和６０．３μｇ／ｍ￣２．群落Ｍｎ、Ｎｉ元素的生物循环中，年吸收量分别为５３６９２．０和１６２７．７μｇ／ｍ￣２，年归还量分别为３９６５３．１和５７３．４μｙ／ｍ￣２，年存留量分别为１４０３８．９和１０５４．０μｇ／ｍ￣２．流动系数Ｍｎ＞Ｎｉ，周转期Ｍｎ１１年快于Ｎｉ５４年。     

观赏百合气培过程中鳞片的细胞形态学观察

采用“气培法”繁殖观赏百合,一个鳞片可以形成２￣４枚小鳞茎,最多的达７枚。组织学观赏结果：鳞片经培养后,鳞片中部细胞平均淀粉粒数由培养前的１０个减少到５．６个,细胞体积由６３．１９×４４．５μｍ减小到６７．６４×３６．４９μｍ。     

山东蒿属花粉形态研究及其在分类上的意义

用光学显微镜和扫描电镜，对蒿属１０种植物花粉形态进行了观察，花粉粒在赤道面观呈近球形或近长球形，极面观呈三裂圆形，具三孔内，外壁具有小刺状纹饰，花粉粒极轴长１２．２９μｍ－１７．９１μｍ，赤道轴宽１２．４４μｍ￣１６．８８μｍ，研究结果表明，本属花粉形态特征支持传统分类的属及属以下各级水平（包括亚属，组和种级）的分类。     

在表面活性剂存在下泰尔登的电分析化学特性研究

在ｐＨ７．００缓冲溶液中，当有０．００２０％ＯＰ存在时，泰尔登在－１．９５Ｖ产生一灵敏极谱波，利用此波可测定痕量泰尔登，检测下限为５．４×１０￣（－９）ｍｏｌ／Ｌ。用恒电位库仑法，计时库仑法和循环伏安法测得反应电子数为２，吸附量为１．１７×１０￣（－１０）ｍｏｌ／ｃｍ￣２，扩散系数为４．３×１００￣（－５）ｃｍ￣２／ｓ。     

乙二醛双缩－4－烯丙基－3－硫代氨基脲分光光度法测定痕量铜的研究

研究了Ｃｕ（Ⅱ）与新试剂乙二醛双缩－４－烯丙基－３－硫代氨基脲的显色反应，该反应生成１：２的红色配合物。Ｃｕ（Ⅱ）在０－４０μｇ／２５ｍｌ范围内服从比耳定律，其表现摩尔吸光系数为２．４×１０￣４Ｌ．ｍｏｌ￣（－１）．ｃｍ￣（－１）。该法用于测定水中微量铜，结果满意。     

皮革蛋白粉中微量铬（Ⅲ）的光度法测定

皮革蛋白粉中微量铬（Ⅲ）与二甲酚橙，在ｐＨ＝４．５～５．０的ＨＡｃ—ＮａＡｃ缓冲溶液中，于沸水浴上反应２０～３０ｍｉｎ，生成１：１的紫红色螯合物。λ＿（ｍａｘ）＝５４２ｎｍ，表观摩尔吸光系数１．５×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。铬（Ⅲ）浓度在０～５０μｇ／５０ｍＬ范围内符合比耳定律。     

4－羟基－3，5－二溴苄叉绕丹宁分光光度法测定银（Ⅰ）

本文提出了新显色剂４－羟基－３，５－二溴苄叉绕丹宁测定银（Ｉ）的分光光度方法．在ｐＨ１２，聚乙二醇－４００存在下，银（Ｉ）与４－羟基－３，５－二溴苄叉绕丹宁形成１：２深红色络合物，其最大吸收波长在５１０ｎｍ，并且在室温下可稳定存在２４小时以上．在２５ｍＬ容积中，Ａｇ￣＋在０～１００μｇ范围符合比尔定律，摩尔吸光系数为１．１５×１０￣４Ｌ·ｍｏＬ￣（－ｌ）·ｃｍ￣（－１），标准偏差为０．００３（ｎ＝１０）．     

固定化酶管安培法快速测定青霉素

整个测定系统由固定化青霉素酶管、流动注射分析仪及碘分子检测池组成。测定原理基本上同碘量滴定法，即青霉素经酶管转化为青霉素噻唑酸，该酸与碘分子发生定量反应，剩余的碘用电化学方法检测。实验表明：测定线性范围为０．０５～０．９０ｍｏｌ／ｍ￣３（取样４０μＬ），线性相关系数为０．９９２。对０．６ｍｏｌ／ｍ￣３的青霉素反复测定１０次，平均值为６２．４９μＡ，变异系数为１．２０％。当青霉素浓度低于１．０ｍｏｌ／ｍ￣３时，条件在一定范围的波动（磷酸盐浓度为０．０５～０．２５ｍｏｌ／ｍ￣３，ｐＨ为６．０～７．５，测定温度１５～２５℃），对测定结果几乎没有影响，测定速率可达每小时１２０个样品。此系统不变，在室温下（８～２０℃）使用时，每天约测４００个样品，酶管使用３０ｄ，未见活力下降。４℃下保存１０个月，酶管活力未见明显下降。     

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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