染料脱色酶特性研究

从脱色优势菌ＮＤ１ 提取脱色酶,对酶特性进行研究．结果表明酶的最适作用条件为ｐＨ ７,３７℃,无氧环境,反应需ＮＡＤＨ 的参与;纯化结果表明经ＤＥＡＥ柱层析及Ｓｅｐｈａｄｅｘ Ｇ－１００ 凝胶层析后脱色速率分别提高１０ 倍和５０倍,Ｓｅｐｈａｄｅｘ Ｇ－１００ 凝胶层析中２～４ 管蛋白具有偶氮和蒽醌染料脱色酶活性,６～１２ 管具有蒽醌染料脱色酶活性．     

改性膨润土混凝剂处理阳离子染料染色废水的研究

介绍了自制的复合改性膨润土对阳离子染料染色废水的吸附絮凝特性,考察了ｐＨ值、反应温度、反应时间、复合改性膨润土用量、助剂、无机盐等因素的影响。结果表明,复合改性性膨润土对阳离子染料染色废水具有优异的吸附性能,以聚丙烯酰胺作助凝剂可使脱色率达９９．９％,ＣＯＤ去除率达９３％,污泥沉降比仅为１～２％,并且具有沉降快、适应性强、操作简单、费用低廉等优点。     

脱色剂与活性染料的分子间相互作用

以聚丙烯腈（ＰＡＮ）和双氰胺（ＤＣＤ）为原料,合成了新型脱色剂．用ＩＲ、１ Ｈ ＮＭＲ和１３Ｃ ＮＭＲ等方法对其结构进行了表征,探讨了脱色剂溶解度随ｐＨ 值变化的规律,研究了脱色剂对活性染料的絮凝脱色的性能．结果表明,脱色剂是侧链带有多种极性基团的聚合物;它在酸性条件下溶解度较小,碱性条件下溶解度较大;脱色剂对活性染料的脱色是有效的．在絮凝脱色研究基础上,用ＩＲ分析以及平衡渗析实验探讨了脱色剂与多种染料的相互作用．实验结果表明,脱色剂的絮凝效果在酸性条件下显著．相互作用研究显示,脱色剂分子侧链的氨基与活性染料的磺酸基发生了键合作用．脱色剂与蒽醌型活性染料的结合存在特殊的温度依赖性,结合程度在２５℃最大;脱色剂与活性染料分子间除了极性基团间相互作用外,还存在疏水相互作用．     

水解磷酸氢钙制备羟基磷灰石粉末的研究--活性生物陶瓷研究之一

本文研究了水解磷酸氢钙（Ｂｒｕｓｈｉｔｅ, ＣａＨＰＯ４·２Ｈ２Ｏ, 简称ＤＣＰＤ） 并用ＣａＯ２·２Ｈ２Ｏ（简称ＣＣＤ） 熟化以制备化学计量的ＨＡＰ粉末的方法． 用产物的Ｃａ／Ｐ（摩尔比） 作为评价指标, 找出了最适宜的ＤＣＰＤ 水解条件： ｐＨ ７．５～８．０, 温度８０ ℃, 水解３ ｈ, 料／水比１ｖ５０, 以及熟化的最佳方案： 熟化三次 （每次１ ｈ）, ｐＨ １１, 温度４０ ℃, 每次ＣＣＤ掺量２０％ , 料／水比１ｖ２５． 合成了化学计量的ＨＡＰ粉末 （Ｃａ／Ｐ＝ １．６７）, 经ｘ 射线衍射分析鉴定确为ＨＡＰ．     

溶剂极性和pH对甲苯胺蓝O溶液的影响

使用分光光度法研究了溶剂极性、温度和ｐＨ对甲苯胺蓝Ｏ（ＴＢＯ）颜色和吸收光谱的影响。实验发现，溶剂极性，染料的聚集作用，不同ｐＨ条件产生的染料分子子化或ＯＨ加合物可造成染料颜色和λｍａｘ变化，实验也证明ＴＢＯ在性条件下不产生脱甲基产物，所产生的不稳定ＯＨ加合物对苯萃取ＴＢＯ的过程有催化作用，而在此过程中ＯＨ加合物发生离解，使用微扰分子轨道理论及Ｄｅｗａｒ规律讨论了溶剂极性和ＯＨ加合作用对染料分子π     

秦川牛血清Es,LDH同工酶与氨基酸组成的初步研究

以陕西关中地区健康秦川牛血清为材料，采用聚丙烯酰胺水平电泳，中ｐＨ凝胶系统分离Ｅｓ同工酶，检出了５～６条酶带、酶谱有两种形式。用高ｐＨ凝胶系统盘电泳分离ＬＤＨ同工酶，谱型ＬＤＨ＿１＞ＬＤＨ＿２＞ＬＤＨ＿３＞ＬＤＨ＿４＞ＬＤＨ＿５。血清游离氨基酸共１６种，其总浓度为３６．９２５ｍｇ／１００ｍＬ，其中必需氨基酸浓度为１４．２９７ｍｇ／１００ｍＬ，支／芳比值为４．０７。这一生化分析数据对秦川牛的研究具有重要参考价值。     

复合混凝剂PAFM混凝脱色性能研究

以黄铁矿烧渣和食盐电解含镁废渣为主要原料研制了一种复合脱色混凝剂ＰＡＦＭ。试验了经的混凝除浊性能和对染料废水的脱色效果，并对其混凝脱色机理进行了探讨。实验结果表明：ＰＡＦＭ具有良好的混凝除浊能力，用于多种料色废水处理在ｐＨ值５．０－１３．０范围内，ＰＡＦＭ脱色性能良好。     

磁场对固定化乳酸脱氢酶催化活性的影响

采用流通池光纤荧光光度法，对固定化乳酸脱氢酶（ＬＤＨ）在静磁场作用下的催化活性进行了探讨。发现在０．０８４￣０．２３０Ｔ磁场下ＬＤＨ的催化活性明显降低，其降低值随磁场强度增强而增大，且与磁场作用的时间和ｐＨ值有关，而在２５￣４０℃范围内，温度则无显著影响。     

磁场对固定化乳酸脱氨酶催化活性的影响

采用流通池光纤荧光光度法，对固定化乳酸脱氢酶（ＬＤＨ）在静磁场作用下的催化活性进行了探讨．发现在０．０８４～０．２３０Ｔ磁场作用下ＬＤＨ的催化活性明显降低，其降低值随磁场强度增强而增大，且与磁场作用的时间和ｐＨ值有关，而在２５～４０℃范围内，温度则无显著影响。     

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。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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