渤海沿海几种速生海藻无机营养元素的分析

分析了采自渤海沿海的几种速生海藻的无机营养元素的含量，并针对不同生长节季、不同海域对分属于不同门类的4种海藻富集无机元素的能力进行比较。结果表明：几种海藻中均含有钾、钙、磷等常量元素和铁、锰、铜、锌等微量元素。其中，褐藻门的钾、钙含量最高，绿藻门的磷含量最高；微量元素中，绿藻门的铁、铜含量最高，而红藻门的锰、锌含量最高。海藻富集元机元素的能力与海藻种类、生长季节及海域有关。     

红江橙叶片矿质元素含量的测定及元素分布状态分析

本文采用等离子体火焰发射光谱法测定了红江橙5种叶片中氮、磷、钾、钙、镁、铜、锌、铁、锰等9种矿质元素含量,并对其分布状态进行了分析.结果显示,红江橙5种叶片样品呈现的共性是锰含量合适,镁含量亏缺,铜含量过量,铁含量偏高或过量,其余元素状态各异.这种叶片元素呈现的状态可能与地域和树体对元素的富集能力有关.     

烤烟营养元素分布特征的主组分分析

以烤烟为对象,按田间试验和盆栽试验测定其不同生育期叶、茎、根的生育期叶,磷,钾,钙,镁,铁,锰,锌、铜、硼１０种元素含量。运用化学计量学中的主组分分析方法,讨论了这些营养元素分布特征,表明,各部位有特征元素,硫,磷,钾,钙,镁等中常量元素,在烟叶中有较高的浓度分布,而烤烟中的铁,锰,锌,铜,硼等微量元素则在根部有较高的浓度分布。提示在进行烤烟矿质的植株诊断时要十分注意不同部位的差异,也说明了可将化     

日粮钙磷含量及比例对大鼠肝组织微量元素的影响

目的探讨钙磷含量及比例对大鼠肝组织微量元素含量的影响。方法将1月龄清洁级Wistar雄性大鼠随机分成7组,每组10只,饲喂7种不同钙磷含量的试粮,试验期42 d。结果相同磷进食水平下,肝铜、肝锰含量在不同钙磷比之间无显著性差异(P>0.05);肝铁含量随日粮钙水平的提高而显著下降(P<0.05);肝锌、肝镁含量在低钙组与高钙组之间存在显著性差异(P<0.05)。相同钙进食水平下,钙磷比4.0∶1组(低磷)的肝铜含量显著高于其它两组(P<0.05);肝铁、肝锰含量在三组之间存在显著性差异(P<0.05)。相同钙磷比水平下,高钙高磷组的肝铁、锰、镁含量明显低于其它组(P<0.0 5)。结论钙影响肝铁、锌、镁的含量,对铜、锰影响不明显。磷影响肝铜、铁、锰的含量,对锌、镁影响不明显。钙磷比为4.0∶1(Ca 1.00%,P 0.25%)时肝中微量元素含量最高,而钙磷比为1.2∶1(Ca 3.00%,P 2.50%)时肝中微量元素含量最低。     

牛膝道地与非道地产区药材及土壤中无机元素分析

目的:通过分析牛膝在不同产区土壤与药材中无机元素的含量,探讨牛膝药材道地性与土壤无机元素的关系.方法:应用电感耦合等离子光谱仪对牛膝药材和土壤样品进行无机元素含量分析.结果:道地产区土壤中钙、镁、锌、铝、硼、铬的含量高,而铅和铜的含量较低;道地药材中钾、铜、铬的含量高,锌和铅的含量低,对磷、铜、铁的富集能力强.结论:牛膝药材与土壤中无机元素的含量密切相关,但牛膝对钠和铁、铝、镉、钛;钙和镁、铝、硼、镉、钛;镁和硼、镉;铜和铬;锌和铅;铝和镉、钛;硼和镉;镉和钛的吸收积累有很好的协同作用,而对铅和铜、钾、铬;铬和硼、锌的吸收和积累则呈明显的拮抗关系.     

秦岭南坡低山区不同土地利用类型土壤微量元素对比分析

以陕南宁陕县旬阳坝镇为例,对比分析了铜、铁、锰、锌4种微量元素在不同土地利用类型中的含量差异.研究结果表明:不同土地利用类型土壤微量元素含量差异明显,铜、铁、锰、锌4种微量元素乔木林地明显高于其他土地利用方式用地,铜、铁元素全量含量乔木林地灌木林地荒草地坡耕地果园,锰、锌元素全量含量乔木林地灌木林地坡耕地果园荒草地,林地最利于微量元素富集;不同退耕年限的林地微量元素迁入与迁出存在差异,微量元素全量含量随退耕年限先减少后增加,在退耕5年左右土壤中微量元素含量达到最大,然后逐渐减少并趋于稳定,稳定后林地微量元素含量仍然高于其他土地利用类型,土地利用类型对土壤微量元素含量的差异起主导作用.     

葵花粕与葵花籽中微量元素含量的测定

对葵花粕与葵花籽样品进行消解后,采用火焰原子吸收光谱法测定其中铜、锌、铁、锰、银、铅和镉等元素含量,用原子荧光光度法测定其中砷、汞的含量.用离子色谱法测定钙、钾、钠的含量.结果表明,铜、锌、铁、锰等元素在样品中普遍存在.钠、钾元素在样品中含量很高.样品中同时检出一定量的微量金属元素.为葵花样品微量元素的分布提供了科学的依据.     

可育和不育临清猫精浆微量元素的测定

采用原子吸陈分光光度法测定了８只可育和１２只不育临清猫精浆中８种微量元素（钾、钠、钙、镁、锌、铁、锰、铜）的含量，统计分析结果表明，钾、钠、钙、镁、锌的浓度在可育组和不育组几乎一样，不育组精浆中铁、锰、铜的浓度较可育组明显升高（Ｐ〈０．０１），不育组各微量元素的相关性发生了变化，精浆中铁、锰、铜的浓度差异及不育组元素的相关变化可能与临清猫的不育有关。     

原子吸收分光光度法测定臭参微量元素的含量

用火焰原子吸收分光光度法对云南宜良产臭参中人体必需的宏量矿物元素钾、钠、钙、镁和微量元素铜、铁、锌、锰的含量进行了测定,其中均含有这些元素.并和一些常用中药中这些元素的进行比较,结果钾高钠低.     

原子吸收分光光度法测定臭参微量元素的含量

用火焰原子吸收分光光度法云南宜良产臭参中人体必需的宏量矿物元素钾、钠、钙、镁和微量元素铜、铁、锌、锰的含量进行了测定，其中均含有这些元素，并和一些常用中药中这些元素的进行比较，结果钾高钠低。     

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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