悬铃木叶片暗棕色抑菌色素的分离纯化及特性的初步研究

以碱提取，酸沉淀和ｓｉｌｉｃａ ｇｅｌ，Ａｌ２Ｏ３及ｓｅｐｈａｄｅｘＧ－２５柱层析分离纯化等步骤，从悬铃木落叶中制备得到了一种暗棕色化合物，经ＰＡＧＥ，ＰＬＣ有ＴＬＣ检测均为单一谱带或单一斑点。     

金顶侧耳多糖同Con A相互作用的研究

从金顶侧耳子实体中分离纯化三种水溶性多糖．Ｇ·Ｃ分析表明ＰＣ－２由葡萄糖、半乳糖、岩藻糖组成；ＰＣ－３由半乳糖、甘露糖组成；ＰＣ－４是单一的葡聚糖．经琼脂糖双扩散，ＰＣ－３同ＣｏｎＡ间可产生沉淀线．定量沉淀反应与ＣＤ谱分析均表明ＰＣ－３通过非还原末端的α－Ｍａｎ与ＣｏｎＡ形成了多糖—蛋白质复合物．部分酸水解实验表明，ＰＣ－３同ＣｏｎＡ的作用与糖链的分支程度有关．高碘酸氧化与硫酸化修饰则使ＰＣ－３同ＣｏｎＡ的结合能力降低或丧失．     

短裙竹荪子实体酸提水溶性多糖的研究——Dd-2DE的分离纯化和组成鉴定

短裙竹荪（Ｄｉｃｔｙｏｐｈｏｒａｄｕｐｌｉｃａｔａ）子实体干品的３％三氯乙酸提取液经乙醇分级、ＤＥＡＥ—纤维素等进一步纯化得到水溶性多糖Ｄｄ—２ＤＥ．经ＳｅｐｈａｄｅｘＧ—２００柱层析和聚丙烯酰胺凝胶电泳鉴定,Ｄｄ—２ＤＥ为均一级份．纸层析和气相层析表明,Ｄ—葡萄糖、Ｄ—半乳糖、Ｄ—甘露糖、Ｌ—岩藻糖和Ｄ—木糖为该多糖的组份,其单糖摩尔比为０．４７１．７２１．０００．１８０．２１．Ｄｄ—２ＤＥ的分子量约为７６０００Ｄａ．     

几类图的伴随多项式的整除性特征

用Ｐｎ和Ｃｎ依次表示有ｎ个顶点的路和圈．Ｄｎ表示Ｋ３的一个顶点与Ｐｎ－２的一个１度点重迭后得到的图．Ｔ（ｌ，ｍ，ｎ）表示度序列是（１，１，１，２，２，……，２，３）的树，其中ｌ，ｍ，ｎ分别是从它的唯一３度点到３个１度点的３条路的长．图Ｇ的伴随多项式记为ｈ（Ｇ，ｘ），本文证明了当Ｇ＝Ｐｎ，Ｃｎ，Ｄｎ，Ｔ（１，１，ｎ），Ｔ（１，２，ｎ），Ｔ（１，３，ｎ），Ｔ（１，４，ｎ）时，ｈ（Ｇ，ｘ）能被ｈ（Ｐｍ，ｘ）（ｍ≥２）整除的充要条件．     

图中含D_λ－圈的一个充分条件

设图Ｇ是一个ｎ阶简单图，Ｇ中的一个圈Ｃ称为Ｄλ—圈，如果Ｇ＼Ｖ（Ｃ）的每个连通分支的阶都小于λ．当Ｇ是３—连通图，且有ＮＣλ（Ｇ）≥ｎ＋４２－２λ时，Ｇ含有Ｄλ—圈或Ｇ是Ｐｅｔｅｒｓｅｎ图．     

红曲霉变异株GF_3的诱变选育及产红色素条件的研究

红曲霉菌经紫外线、亚硝基胍、Ｃ６０Ｏ氯化锂等诱变处理，选得ＧＦ３变异株一支，该菌株产色 素的能力比原菌株显著提高，醇溶性色素的色价提高了１２８％，水溶性色素的色价提高了６１．５％，     

蜗牛肝超氧化物歧化酶的纯化及性质研究

实验以新鲜蜗牛肝脏为材料，经匀浆、盐析、氯仿－乙醇处理、透析和ＳｅｐｈａｄｅｘＧ－７５柱层析等步骤、纯化得到超氧化物歧化酶。对其理化性质鉴定表明，用此法纯化的ＳＯＤ纯度均一，比活力为６８００Ｕ／ｍｇ·ｐｒ，分子量为３０．３ＫＤ，紫外最大吸收峰２５９．６ｎｍ，Ｎ－末端分析表明为Ａｌａ。     

GaAS-Ga_(1-x)Al_xAS双异质结激光器欧姆接触的研究

我们用正交表研究ＧａＡｓ的欧姆接触工艺．实验结果表明， ｐ－ＧａＡｓ用 Ａｕ—Ｃｒ 金、ｎ－ＧａＡｓ用 Ａｇ—Ｓｎ合金的欧姆接触工艺．比接触电阻率 Ｒｃ＜１０－４（欧姆）（厘 米）３应用于 ＧａＡｓ—Ｇａ１－ｘＡｌｘＡｓ双异质结激光器．得到良好的效果。     

黑曲霉胞外葡萄糖淀粉酶的纯化及特性

黑曲霉（Ａｓｐｅｒｇｉｌｌｕｓｎｉｇｅｒ７２８）的粗酶液，经硫酸铵沉淀，ＳｅｐｈａｄｅｘＧ－２５柱凝胶过滤脱盐，ＤＥＡＥ－Ｔｏｙｏｐｅａｒｌ离子交换柱层析和ＳｅｐｈａｃｒｙＳ－１００凝胶层析纯化，经ＰＡＧＥ鉴定为一条带ＳＤＳ凝胶电泳测定分子量为７００００．金属离子Ｆｅ３＋对该酶有一定的抑制作用，该酶的等电点为３．７，最适ｐＨ为４，最适温度为６０℃．Ｅ２８０１％为１５．７２，Ｋｍ值为０．１１２×１０－３ｍ．     

短裙竹荪子实体酸提水溶性多糖的研究：Dd—2DE的分离纯化和？…

短裙竹荪（Ｄｉｃｔｙｏｐｈｏｒａ ｄｕｐｌｉｃａｔａ）子实体干品的３％三氯乙酸提取液经乙醇分级、ＤＥＡＥ－纤维素等进一步纯化得到水溶性多糖Ｄｄ－２ＤＥ．经ＳｅｐｈａｄｅｘＧ－２００柱层析和聚丙烯酰胺凝胶电泳鉴定，Ｄｄ－２ＤＥ为均一级份。纸层件和气相层析表明，Ｄ－葡萄糖、Ｄ－半乳糖、Ｄ－甘露糖、Ｌ－岩灌糖和Ｄ－木糖为多糖的组份，其单糖尔比为０．４７：１．７２：１．００：０．１８：０．２１．Ｄｄ－２Ｄ     

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     

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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