黄粉虫氨基酸水解液的研制

对水解黄粉虫蛋白适宜的酶进行了研究，结果表明：胰蛋白酶水解黄粉虫蛋白是最佳选择。并对影响酶解反应的因素进行了选择和分析，适宜的反应条件为：黄粉虫与水的重量比为３０∶１０５，酶作用量为黄粉虫重量的０．５％，控制反应温度５０℃，酶解时间５ｈ，ｐＨ＝８．０。在此基础上，针对单一酶水解的特异性，蛋白质水解率低的问题，进行了提高其水解率的研究，结果发现，采用脱脂、浸提、双酶水解等处理可大大提高蛋白水解率。最后用发酵法脱除异味，制得一种氨基酸含量丰富的水解液     

毛发水解制取胱氨酸的研究

对毛发水解制取胱氨酸的反应条件进行了研究，得出了反应温度、盐酸浓度及水解时间与胱氨酸产率的关系，并提供了较好的回收盐酸的方法。     

超(近)临界条件下醋酸甲酯的水解工艺

近临界水与有机物的优异互溶和对有机反应的酸碱催化能力，为绿色化学合成工艺的开发提供了良好的契机。本文以醋酸甲酯水解为研究对象，在管式及釜式反应器中，采用工业装置的进料水酯比，研究了在超(近)临界条件(523—673K，23—32 MPa)下的反应行为，同时利用反应区域相分离技术改善了反应后期的转化率。实验结果表明，醋酸甲酯水解能够在150-200s停留时间范围内接近反应平衡转化率(水酯摩尔比2：1时转化率达到41％)，无需外加酸性催化剂，通过加入相分离介质苯，在短停留时间内转化率能提高3％。与现有水解工艺比较表明，超临界水解工艺在技术上有较高竞争力。     

下脚丝水解条件的实验研究

本文的重点是研究影响下脚丝水解程度的酸浓度、反应温度、反应时间等因素，由实验得出其最佳水解条件．     

超声波作用下纤维素酶水解反应动力学的研究

经超声波处理过的灵芝子实体用纤维素酶水解．以酶促反应动力学的理论为依据，将实验所得数据用作图法推断出在有超声场和无超声场条件下，酶促反应方式为有三种不同水解难易程度的假一级反应，按最小二乘法进行曲线拟合并求解方程的非线性参数，建立两个不同水解方法的反应动力学方程     

甲酸甲酯水解固体超强酸催化剂的研究

固体超强酸作甲酸甲酯水解转化率和对甲酸的催化剂、进料速度、反应温度对甲酸甲酯水解转化率和对甲酸出口浓度的影响，当原料水与酯的摩尔比为１、反应温度１００℃、原料与催化剂的接触时间为１６ｍｉｎ时，甲酸甲酯的转化率为２４．６％（甲酸的出口浓度达１４．５％）。     

水环境中农药的水解研究分析

残留在水环境中的农药受到各种生物和非生物因素的影响,会发生复杂的蓄积和降解行为。通过对国内外关于水环境中农药的水解的影响因素和降解机理研究进行总结和归纳,综述了农药的水解动力学规律及水解机理,给出了综合性结论,即农药的水解机理主要是亲核取代反应历程。在一定的温度和pH值条件下,农药的水解遵从一级反应动力学规律,水环境的pH值决定了农药水解的反应速率。     

单分散二氧化硅体系制备中正硅酸乙酯水解与成核及颗粒生长的关系

用透射电镜对乙醇介质中氨催化下正硅酸乙酯（ＴＥＯＳ）水解制备单分散二氧化硅微粒过程中颗粒的生长过程进行了跟踪，通过对ＴＥＯＳ的水解速率与成核及颗粒生长速率间关系的研究，发现水解是整个反应的控制步骤，影响水解的因素也同样影响成核及颗粒的生长。     

桃胶多糖酸水解的规律

为有效控制桃胶多糖的水解,以桃胶多糖为原料,用DNS法测定其在pH=1及不同水解温度和时间下的单糖的含量,进而计算出水解度. 结果表明桃胶多糖的酸水解属于拟一级反应类型;在70、75、80、85、90、95 ℃反应时其表观反应速率常数分别是1.72×10-5 s-1 、 3.74×10-5 s-1 、 5.77×10-5 s-1 、 9.41×10-5 s-1、 1.45×10-4 s-1、 2.23×10-4 s-1 ,其水解反应的表观活化能是1.03×105 J·mol-1,反应的表观频率因子是9.72×1010. 在实验温度范围内反应速率常数温度的升高而增大,且两者之间的关系符合Arrhenius公式. 总结出桃胶多糖酸水解反应的Arrhenius公式是k=9.72×1010exp(-1.03×105/RT),进而得到水解度为1-1/exp{[9.72×1010exp(-1.03×105/RT)]t}     

用酸酶法水解玉米蛋白质制备复合氨基酸

本研究从淀粉及淀粉糖厂的副产物中提取蛋白质，然后进行酸酶水解制成复合氨基酸，作为调味品和软饮料等的生产原料。这种生物与化学相结合的方法即能提高水解度又能防止氨基酸受到破坏。该法的工艺和设备简单，反应条件温和，是开发和应用新的蛋白资源、保护生态环境的一条途径。     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

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