提取萹蓄总黄酮化学实验及测定

通过对提取蔚蓄总黄酮的微型化学实验法（恒压分液漏斗）与常规实验法（超声波、索氏提取器）比较,实验证明微型化学实验法与常规实验法相比较,该方法具有使用试剂量小、污染小、省时间．适合选做天然有机物的提取化学实验．对所提取的黄酮类物质进行验证,用分光光度法测定含量．微型化学实验法提取蔚蓄总黄酮,测得品中总黄酮的平均含量为1．96％,平均回收率为101％．     

在普通高校篮球普修课上运用比赛教学法的效果初探

本文通过实验设计和数理统计的方法探究在普通高校篮球普修课上运用比赛教学法的效果。结果表明，在定点投篮上实验组和对照组的t（65．9）=2．73，p=0．008〈0．01，行进间单手投篮的t（66．32）=354，p=0.001〈0．01。统计结果证明比赛教学法能有效提高高校篮球普修课的教学效果。‘     

双孔非气腹腔镜技术在胆囊切除中的运用

目的探讨双孔非气腹技术在胆囊切除中的效果。方法采用临床病例对照的方法，设置常规腹腔镜胆囊切除组（气腹组）和双孔非气腹腔镜切除组（非气腹组）进行手术。结果两组病例比较，手术时间（t=0．956，P=0．361）、胃肠道恢复时间（t=0．038，P=0．970）、平均住院时间（t=0．117，P=0．911）、并发症的发生率（P=1．00）均无显著性差异。结论对于有心肺功能障碍的胆囊结石的老年患者使用非气腹技术是安全可行的，疗效与气腹组相当；双孔技术是腔镜技术向“无创”发展的重要阶段。     

高效液相色谱法测定匝迪-5丸中胡椒碱的含量

目的：测定匝迪-5中胡椒碱的含量．方法：采用HPLC法．结果：进样在0．24～1．2μg有良好的线性关系，r=0．9998。平均回收率为98．1％，CV=1．92％(n=5)．结论：该方法分离效果好，简便、快速，结果准确，使用于测定匝迪-5中胡椒碱的含量．     

提取蓄总黄酮化学实验及测定

通过对提取萹蓄总黄酮的微型化学实验法(恒压分液漏斗)与常规实验法(超声波、索氏提取器)比较,实验证明微型化学实验法与常规实验法相比较,该方法具有使用试剂量小、污染小、省时间.适合选做天然有机物的提取化学实验.对所提取的黄酮类物质进行验证,用分光光度法测定含量.微型化学实验法提取萹蓄总黄酮,测得样品中总黄酮的平均含量为1.96%,平均回收率为101%.     

紫花地丁总黄酮提取的微型实验

通过对紫花地丁中总黄酮提取微型实验方法和常规实验方法的比较，微型化学实验适合选做紫花地丁总黄酮提取化学实验．用分光光度法测定含量，微型化学实验法提取紫花地丁总黄酮，测得样品中总黄酮平均含量为2．34％，平均回收率为99．7％．     

变连接权时滞细胞神经网络的概周期解

利用不动点理论和微分不等式分析等方法，研究了具有变连接权的时滞细胞神经网络dxi（t）/dt=-cixi（t）＋∑j=1^nαij（t）fi（xi（t））＋∑j=1^nbij（t）fj（xj（t-τ（t）））＋li（t）的概周期解的存在性和全局吸引性，推广和改进了相关文献的结果，扩大了神经网络的设计范围．     

去势治疗对前列腺癌患者骨密度的影响

目的探讨去势治疗对前列腺癌患者骨密度（Bone mineral density，BMD）的影响。方法49例完成骨密度测定的前列腺癌患者分两组。拟去势组21例，在开始去势治疗前即已完成骨密度测定。去势组28例，均为去势治疗1年以上患者。所有患者骨密度测定均采用双能X线吸收法（DEXA法），骨密度测定部位为腰椎（L2-4）、股骨颈。结果拟去势组62％、去势组82％均存在不同程度的BMD水平下降。拟去势组中，腰椎（L2-4）Z评分为-0．9±0．7，股骨颈Z评分为-0．6±0．5；而去势组中，腰椎（L2-4）Z评分为-1．8±1．1，股骨颈Z评分为-1．6±1．0。可见，与拟去势组相比，去势组患者BMD水平明显偏低，差异有统计学意义（腰椎BMD比较t=3．33，P〈0．01）。股骨颈BMD比较t=4．17，P〈0．01）。结论去势治疗与前列腺癌患者BMD水平下降明显相关。     

一类非线性脉冲时滞差分方程的振动性

研究了如下具有脉冲的非线性多时滞差分方程{x（t）-x（t-τ）＋p（t）f（x（t-σ））=0, t≥0,t≠tk x（tk^＋）-x（tk）=bk x（tk）.t=tk,k=1,2,…利用构造函数，通过反证法、单调有界原理及极限与求和的方法得到了方程振动的两个充分条件，对已有文献中的某些结果进行了推广和改进．     

酚硫酸法测定灵芝多糖的研究

目的：从灵芝中提取多糖，并测定其含量．方法：灵芝多糖的提取一般方法为醇析沉淀法，本实验为找出该方法的最佳工艺条件，结果表明：灵芝多糖提取的最佳工艺条件为：乙醇浓度85％，乙醇：料液为2：1，pH为6．5．结果：用酚-硫酸比色法测定多糖的含量，测得灵芝多糖含量6．55％，平均回收率99．05％，RSD=1．02％（n=3）．结论：该法操作简便，重现性好，实验结果令人满意．     

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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