膨润土的提纯,改型及脱水方法研究

对膨润土提纯、改型及改型后膨润土浆液絮凝脱水条件进行了研究．在料浆浓度３５％、稀释浓度５％和沉降悬浮１．５ｈ时得提纯精土浆液（Ⅰ）；Ⅰ与Ｎａ２ＣＯ３（４．０ｇ／１００ｇ干土）在９６℃反应１．５ｈ得钠改型土浆液（Ⅱ）；１００ｇ２．５１％的Ⅱ加入０．５ｇＫＡｌ（ＳＯ４）。在３０℃、ｐＨ＝４时絮凝脱水可使滤饼含固量达３２％．     

正交试验法探讨咖啡因精制工序最佳工艺

以咖啡因试验Ａ项、Ｂ项外观和荧光为指标，采用正交试验法对全合成法制咖啡因（加氢还原）的精制过程中水、高锰酸钾和活性碳的配比；ｐＨ值；氧化时间及脱色时间进行了优选。结果表明最佳工艺条件是精制水配比为５００％、高锰酸钾配比为１．２％、活性碳配比为５％、ｐＨ值为３、氧化时间１．５ｈ、脱色时间１．５ｈ。     

绿色木霉A10纤维素酶的分离纯化及理化性质研究

绿色木霉Ａ＿（１０）纤维素酶Ａ＿２的Ｃ＿１酶和Ｃｘ酶被分离纯化。Ｃ＿１酶的分子量为５４，４９，４４．５ｋｄ（三个亚基），最适温度为５０℃，最适ｐＨ为５．０；Ｃｘ酶的分子量为１７．５ｋｄ，最适温度为５５℃，最适ｐＨ为４．５。两者均为糖蛋白，富含极性氨基酸，水溶性好。     

固定化细胞合成L—苯丙氨酸的酶活及稳定性

研究了固定化酶ＰＡＬ合成Ｌ－苯丙氨酸过程中的酶活力与酶稳定性情况，找出了维持酶活的最佳保存条件，考察了不同氨基供体、肉桂酸、ｐＨ值及酶的不同固定化量等因素对酶反应过程的影响，确定其适宜反应条件为肉桂酸１．５％～２．０％，醋酸铵２～４ｍｏｌＬ－１，ｐＨ８．５～１０，温度３０℃，细胞固定化量为０．１ｇ湿细胞／ｇ固定化颗粒     

果胶酶对葡萄汁非酶褐变的影响

通过对果胶酶（国际命名分类号为：ＥＣ３．１．１．１１）在不同用量、酶解时间、作用的ＰＨ值和作用温度和葡萄汁非酶褐变进行４因素４水平正交试验，找出褐变度最低的果胶酶作用最佳条件是：果胶酶用量为０．１５ｇ．ｋｇ＾－１果浆；酶解时间２ｈ；ｐＨ值为３．５温度是４５℃。通过酶处理与对照的非酶褐变的反应物含量进行比较，发现酶处理能提高非酶褐变反应物的含量。     

根霉2#(Rhizopussp.2#)产酶条件研究

对影响根霉２＾＃（Ｒｈｉｚｏｐｕｓ ｓｐ．２）产生生淀粉分解酶的碳源、氮源、无机盐、温度、ｐＨ值等进行优化组合试验，摸索出了一个最佳的产酶条件，该条件为：木薯渣５％、花生麸０．７５％、尿素０．１％、Ｋ２ＨＰＯ４０．１％、ＭｇＳＯ４０．０７５％、ｐＨ值５．０、３２℃摇瓶培养９６ｈ。使用该条件可使得发酵酶液的酶活达到７．７５Ｕ／ｍＬ。     

316L不锈钢楔形缝隙内溶液化学

用微电极研究了３１６Ｌ不锈钢楔形缝隙在３．５％ＮａＣｌ溶液（室温）中的溶液化学变化规律。结果表明：在两种不同缝隙开口情况下，缝隙内各点的Ｃｌ－都发生了富集，ｐＨ也都降低；当缝隙开口为１．３６ｍｍ时，缝隙内Ｃｌ－浓度随时间和与缝口距离的增大而增大，ｐＨ值随之下降，最高Ｃｌ－浓度为１．６ｍｏｌ／ｌ，最低ｐＨ值为５．０１；当缝隙开口为０．２２ｍｍ，最高Ｃｌ－浓度为１．１ｍｏｌ／ｌ，最低ｐＨ值为３．１．缝隙内溶液酸化是由于金属离子的水解和Ｃｌ－的共同作用，缝内金属氯化物浓度甚至可以达到饱和态。     

加压排代色谱法分离纯化~(55,59)Fe制备无载体~(60)Co和~(54)Mn的工艺研究

研究了用加压排代色谱法从堆照产物Ｆｅ中分离出无载体放射性同位素６０Ｃｏ，５４Ｍｎ及纯化５５，５９Ｆｅ．以ＤＴＰＡ作排代剂，Ｈ＋为阻滞离子，研究了阻滞离子、排代剂ｐＨ、线性流速及柱比等工艺条件对分离效果的影响．其最佳工艺条件为：ｃＤＴＰＡ＝０．０５ｍｏｌＬ－１，ｃＶｃ＝０．０５～０．１０ｍｏｌＬ－１；ｐＨ＝６．０～８．０；线性流速为７．５～１０ｃｍｍｉｎ－１；柱温：７０℃；柱比大于０．５．     

不同色光、温度、pH对草珊瑚愈伤组织的培养效应

报道了草瑚珊愈伤组织生长和次生代谢物与光、温度、ｐＨ不同的物理因子培养条件的关系。结果表明，暗培养的愈伤组织生长和代谢物含量较高，而蓝光在草珊瑚愈伤组织培养中，表现了蓝光效应，诱导出一个优良的愈伤组织系，其相对增长率和总黄酮月产率分别为７５９％，１．８６８ｇ／Ｌ。最佳培养温度为２６℃恒温，最适愈伤组织生长的培养基ｐＨ值为５．５；而最适愈伤组织代谢次级产物的生产培养基ｐＨ值为６．０。     

坚炉球团粘结剂的选择

根据球团竖炉生产的特点，作者研究了膨润土、消石灰及有机／无机复合粘结剂对生球爆裂温度的影响规律。结果表明，在混合料中只需添加０．０２％～０．０３％水溶性有机物Ａ或Ｂ，就能使膨润土的添加量从目前的１．８％～３．０％降至０．５％～０．７％；若用消石灰系复合粘结剂，消石灰的加入量以０．７％～１．０％为宜，同时加入０．１％～０．２％的水溶性有机物，就能满足竖炉生产对未焙烧球团的质量要求。     

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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