生物法处理含油废水微生物净化功能的研究

研究了用生物法处理含油废水的微生物净化效能,从曝气池的活性污泥中,筛选出了降解油类的高铲菌株,并考察了该菌株降解油类的最佳生态条件;即充分曝气供氧,ｐＨ值７．０,降解温度２５℃,在此条件下,油浓度５０ｍｇ／Ｌ时,油的降解率可达９８．３１％。     

基因重组人Gamma-干扰素发酵和提取优化工艺的研究

对基因重组人Ｇａｍｍａ－干扰素（ｒＩＦＮ－γ）ＰＢＶ２２０ＤＨ５α工程菌株的发酵工艺进行了研究．结果表明,采用在２５０ｍＬ摇瓶中装液量为１５０ｍＬ,按照１∶４０的稀释比进行两次扩大培养,并在大肠杆菌生长最为活跃的对数生长期内进行诱导表达效果最好．收集菌体以后,将菌体进行冷冻和超声破碎,并在２．０ｍｏｌ／Ｌ脲中浸泡８ｈ～９ｈ以清洗杂蛋白,然后用７．０ｍｏｌ／Ｌ盐酸胍（Ｇｕ·ＨＣｌ）提取．在优化工艺条件下,ｒＩＦＮ－γ的收量为９．０×１０６ＩＵ／Ｌ～１２．８×１０６ＩＵ／Ｌ,总蛋白为７９．５ｍｇ／Ｌ～１２７．２ｍｇ／Ｌ,比活为５．６×１０５ＩＵ／ｍｇ～８．０×１０５ＩＵ／ｍｇ,ＳＤＳ－ＰＡＧＥ电泳含量可达６０％～８０％,使ＰＢＶ２２０ＤＨ５α工程菌株获得了高效表达．     

光合细菌降解3种有机废水的试验研究

选用从有机废水中分离出的７株光合细菌菌株，并用于处理豆制品、淀粉、肉制品废水。研究试验表明：①经对ＣＯＤ＿（Ｃｒ）＝５２８００ｍｇ／Ｌ的豆制品废水进行１４４ｈ的处理，去除率达９２．７％；②经对ＣＯＤ＿（Ｃｒ）＝３８６４ｍｇ／Ｌ的淀粉废水进行７２ｈ处理，去除率达９９．５％；③经对ＣＯＤ＿（Ｃｒ）＝５０ｌ０ｍｇ／Ｌ的肉制品废水进行７２ｈ处理，去除率达９３％。另通过光合细菌菌株对不同浓度不同性质的废水处理比较、单菌株与混合菌株的比较；时间、ｐＨ值、接种量等因素对处理的影响比较，均得到了今人满意的处理试验结果。     

γ-亚麻酸高产菌株的选育

以从土壤中筛选得到的被孢霉菌为出发菌，用紫外线诱变处理，筛选γ－亚麻酸高产变异株，用摇瓶发酵选出其最佳培养基配方。原出发菌株细胞干重２５．０ｇ／Ｌ，油脂含量９．５ｇ／Ｌ，γ－亚麻酸含量５．０％。选出的高产菌株在最佳条件下发酵，细胞干重５０．２ｇ／Ｌ，油脂含量２１．８ｇ／Ｌ，γ－亚麻酸含量８．５％。所得高产菌株具遗传稳定性。发酵油脂具优良特性，适用于保健食品及药品开发。     

细菌降解氰的研究

通过驯化富集培养，从煤气厂曝气池活性污泥中分离出一株能降解氰的菌株，经鉴定为芽孢杆菌属。该菌对氰有较高忍受能力，降解氰的最适条件为：充分曝气供氧；温度为３５℃，ＰＨ＝９．０；在条件下，培养液中氰的浓度为１０．８９ｍｇ／Ｌ时，摇床振荡培养３５小时，氰的降争率可达６１．９％。     

建兰簇生原球茎的诱导及分化诸因素研究

以建兰的腋芽为外植体,诱导出了簇生原球茎．Ｂ５和ＭＳ培养基均适宜,在１～５ｍｇ／ＬＮＡＡ和０．５～３ｍｇ／ＬＢＡ的范围内,激素含量高,有利于簇生原球茎的诱导．激素浓度高于４ｍｇ／Ｌ,能形成假根茎．假根茎和簇生原球茎均能分化出营养芽和花芽．花芽在连续光照下,可在试管内开花．椰乳亦是原球茎诱导的促进物质,以８％～１５％的浓度为宜．１ｍｇ／ＬＢＡ和０．６ｍｇ／Ｌ４ＰＵ－３０能促进原球茎的分化．活性炭对防止褐化,促进根系生长是有用的     

UASB反应器处理低浓度有机废水的机理研究

研究了６．５ＬＵＡＳＢ反应器在常温下处理低浓度有机废水的启动、运行和基质降解动力学．研究表明：当污水水温大于１５℃时，运行２０ｄ后出现颗粒污泥，４６ｄ基本上完成反应器的启动．在水温为１５～２９℃下运行，水力停留时间在３～８．７ｈ，ＣＯＤ去除率可达７１．９％～８８．５％．对反应器建立基质降解动力学模型，在平均温度为１７．２℃，２２．３℃和２６．４℃下减速增长速度常数Ｋ２分别为１．８９×１０－３，２．４０×１０－３和２．７７×１０－３Ｌ／ｍｇＶＳＳ·ｄ．     

荞麦的组织培养及植株再生

荞麦（Ｆａｇｏｐｙｒｕｍ ｅｓｃｕｌｅｎｔｕｍ Ｍｏｅｎｃｈ．）无菌苗下胚轴切段在含不同激素配比的ＭＳ培养基上进行愈伤组织诱导,发现在 ２． ０ ｍｇ／Ｌ ２． ４－Ｄ与 １． ５ ｍｇ／Ｌ ６ ＢＡ组合时,可１００％地诱导出愈伤组织。愈伤组织在含 １．５ｍｇ／Ｌ ６ＢＡ和１．５ ｍｇ／Ｌ ２．４－Ｄ的激素条件下继代培养１代后转入含２ｍｇ／Ｌ ６ ＢＡ和１ｍｇ／Ｌ ＫＴ的 ＭＳ培养基上,计有８０％以上可分化出苗。转入０．２ｍｇ／Ｌ ＮＡＡ的 １／２ＭＳ培养基上则可诱导出根。研究建立了荞麦离体诱导高频率再生植株的实验体系。     

液膜法处理高浓含酚废水的研究

本文研究了液膜法处理高浓含酚废水的工艺条件,考查了不同因素对除酚的影响．实验结果表明：对含酚１００００～４７０００ｍｇ／Ｌ的工业废水,经２～３级液膜处理,出口水中酚浓度即可降至０．５ｍｇ／Ｌ以下,除酚率大于９９．９９％,内相富集酚达２７０ｇ／Ｌ以上,可回收酚．     

太白米愈伤组织的诱导

把太白米小鳞茎基部０．１－０．５ｍｍ处切口，接种于ＭＳ＋ＮＡＡ １ｍｇ／Ｌ＋２．４－Ｄ１ｍｌ／Ｌ＋ＺＴ０．１ｍｇ／Ｌ和ＭＳ＋ＮＡＡ０．５ｍｇ／Ｌ＋ＺＴ０．１ｍｇ／Ｌ培养基上，置黑暗中培养，小鳞茎能脱分化产生大量愈伤组织，诱导率在９５％以上，且生长迅速。     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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