黑曲霉AJ1958菊粉酶的产生和性质

从菊芋根际土壤中分离出一株菊粉酶（ＩｎｕｌｉｎａｓｅＥ．Ｃ．３．２．１．７）产生菌，经物理和化学诱变得高酶活黑曲霉突变株ＡＪ１９５８．该菌株在培养基（０．０７ｇ／ｍＬ菊芋提取液１０００ｍＬ，豆饼粉５ｇ，麸皮５ｇ，ＫＣＩ０．７ｇ，ＦｅＳＯ４·７Ｈ２Ｏ０．０１ｇ，ＭｇＳＯ４·７Ｈ２Ｏ０．５ｇ，ＰＨ５．０）中，于３０℃振荡培养３ｄ，酶活力可达６４μｍｏｌ·ｍｉｎ－１．酶水解反应的最适ＰＨ为３．０～４．０，最适温度为６０℃，在ＰＨ２．５～５．５的范围内和７５℃以下较稳定．适宜条件下，１０ｈ内０．０５ｇ／ｍＬ的菊粉溶液中之底物几乎１００％被酶水解．产物糖中果糖质量分数为９３％，葡萄糖质量分数为５．６％．该突变株产生的菊粉酶具有较满意的水解性和热稳定性．     

木聚糖降解菌的筛选和木聚糖酶性质的研究

筛选两株生长快、产木聚糖酶活力高的菌种；黑曲霉（Ａｓｐｅｒｇｉｌｌｕｓｎｉｇｅｒ，ＡＮ０１）、链霉菌（Ｓｔｒｅｐｔｏｍｙｃｅｓｓｐ．Ｓｔｒ７Ｂ），酶活力分别达１２８ｍｇ／Ｌ·ｍｉｎ和１７６ｍｇ／Ｌ·ｍｉｎ；酶反应最适温度分别为６０℃与５０℃；最适ｐＨ值为５．０和６．０，并分别在ｐＨ２．２～５．０，５．８～６．４酶活性稳定；在６０℃条件下保温１．５ｈ，酶活力分别剩余２０．５％，８８．５％，其中ＡＮ０１株原酶液在９０℃保温１０ｍｉｎ，活力仍剩余１４．５％．Ｃｕ２＋对酶活表现出极强抑制，Ｆｅ２＋，Ｍｇ２＋，Ｃａ２＋等离子则有促进作用；用纸层析法探讨了不同培养时间各种产物产生的情况．     

产胞外木聚糖酶青霉菌发酵条件的正交设计试验

正交设计试验结果表明,青霉菌（Ｐｅｎｉｃｉｌｌｉｕｍ ｓｐ．ｍ８） 胞外木聚糖酶活力达９２．９６ Ｕ／ｍＬ,合适的产酶发酵条件为：培养基（ｇ／Ｌ）,麦草粉４０,（ＮＨ４）２ＳＯ４ ４．４４,ＫＨ２ＰＯ４ １．０,ＭｇＳＯ４ ·７Ｈ２Ｏ０．５,ＮａＣｌ０．３,Ｔｗｅｅｎ ８０ ３．０,ＣａＣＯ３ １．０;每亳升培养基接种２．０×１０５ 个孢子,２８ ℃,水浴振荡培养４ ｄ（１２０ｒ／ｍｉｎ）。     

斑节对虾组织的原代培养

选用Ｌ－１５,添加１０％～２０％ＦＢＳ,渗透压用ＮａＣｌ等调节,ｐＨ７．０,在２８℃下,原代培养斑节对虾的多种组织,发现淋巴器官,造血器官和血淋巴的组织细胞在较宽范围的培养基渗透压条件下能贴壁生长形成细胞单层．每升培养基添补７．５０ｇＮａＣｌ,０．３２ｇＫＣｌ,１．０２ｇＭｇＣｌ２６Ｈ２Ｏ,０．４９ｇＭｇＳＯ４７Ｈ２Ｏ,２．００ｇＣａＣｌ２２Ｈ２Ｏ和０．３０ｇ葡萄糖调节渗透压时,上述３种组织细胞生长最好     

活性艳红X—3B氧化脱色的研究

采用Ｆｅｎｔｏｎ试剂对高浓度活性艳红Ｘ－３Ｂ废水进行氧化脱色。研究表明,ＦｅＳＯ４．７Ｈ２Ｏ＝０．４ｇ／ｌ,Ｈ２Ｏ２＝３．０ｍｌ,ｐＨ＝３－５时,３０ｍｉｎ内的脱色率达９５％以上,１２０ｍｉｎ时残留ＣＯＤｃｒ为８７．６ｍｇ／ｌ．Ｆｅｎｔｏｎ试剂的脱色作用。     

拟除虫菊酯对昆虫 ATPase 的影响研究

美洲大蠊中枢神经系统ＡＴＰａｓｅ活力测定的最适反应条件是：对于Ｎａ＋－Ｋ＋－ＡＴＰａｓｅ,蛋白质含量５～１０μｇ,ｐＨ值７．０,反应温度３０℃,反应时间１５ｍｉｎ．Ｋｍ和Ｖｍａｘ分别为５．３８×１０－３ｍｏｌ／Ｌ和１４３．７５ｎｍｏｌ／ｍｉｎ·ｍｇ－１．Ｃａ２＋－Ｍｇ２＋－ＡＴＰａｓｅ基本相同,只是ｐＨ值为７．４,Ｋｍ和Ｖｍａｘ分别为２．６４×１０－４ｍｏｌ／Ｌ和４６．２８ｎｍｏｌ／ｍｉｎ·ｍｇ－１．初步研究了氯氰菊酯及氰戊菊酯的不同异构体对ＡＴＰａｓｅ的影响,结果显示均对ＡＴＰａｓｅ有不同程度的抑制,与生测结果不完全一致．     

Cl~- 和 SO_4~(2-) 对厌氧废水处理的抑制阈值

用人工配制高浓度有机废水分别研究了Ｃｌ－和ＳＯ２－４对厌氧生物废水处理的抑制作用和抑制阈值．在全混流厌氧恒化器和上流式厌氧污泥床（ＵＡＳＢ）反应器中分别得到了对厌氧消化基本无抑制作用（全混流恒化器：Ｃｌ－＜４．５ｇ／Ｌ,ＳＯ２－４＜１．８ｇ／Ｌ;ＵＡＳＢ：Ｃｌ－＜７．２ｇ／Ｌ,ＳＯ２－４＜３．０ｇ／Ｌ）;轻度抑制（全混流恒化器：Ｃｌ－＝４．５～６．０ｇ／Ｌ,ＳＯ２－４＝１．８～３．３ｇ／Ｌ;ＵＡＳＢ：Ｃｌ－＝７．２～８．２ｇ／Ｌ,ＳＯ２－４＝３．０～４．１ｇ／Ｌ）;中度抑制（全混流恒化器：Ｃｌ－＝６．０～１３．８ｇ／Ｌ,ＳＯ２－４＝３．３～６．５ｇ／Ｌ;ＵＡＳＢ：Ｃｌ－＝８．２～１０．０ｇ／Ｌ,ＳＯ２－４＝４．１～６．０ｇ／Ｌ）和重度抑制（全混流恒化器：Ｃｌ－＞１３．８ｇ／Ｌ,ＳＯ２－４＞６．５ｇ／Ｌ;ＵＡＳＢ：Ｃｌ－＞１０．０ｇ／Ｌ,ＳＯ２－４＞６．０ｇ／Ｌ）的不同Ｃｌ－和ＳＯ２－４浓度范围．     

化学需氧量COD_（Cr）测定条件改进的研究

本文提出以Ａｇ２ＳＯ４—Ａｌ２（ＳＯ４）３—ＭｇＳＯ４作催化剂，在Ｈ２ＳＯ４－Ｈ３ＰＯ４混酸溶液中快速测定废水ＣＯＤ的新方法．实验确定的最佳条件是：Ａｇ２ＳＯ４：Ａｌ２（ＳＯ４）３：ＭｇＳＯ４＝１∶１∶１（质量比），Ｈ２Ｏ４：Ｈ３ＰＯ４＝５∶１（体积比），回流时间０．５小时，通过对废水ＣＯＤ的测定，取得与标准法相近的结果．     

均匀设计在肌苷发酵中的应用

采用均匀设计对肌苷工程菌枯草芽孢杆菌株Ｑ２９０１－４－３５（ＳＧｒ）的最佳发酵条件进行了研究。确定发酵培养基配方为（质量分数）葡萄糖１２％ ,药用酵母粉１．４％ ,硫酸铵１．３％ ,玉米浆０．５％ ,Ｎａ２ＨＰＯ４·１２Ｈ２Ｏ ０．５％ ,ＫＣｌ０．６％ ,ＭｇＳＯ４·７Ｈ２Ｏ ０．２２％ ,ＣａＣＯ３ ２．０％ ,尿素０．２％ （分消）ｐＨ７．０,在上述发酵培养基中发酵产苷达１５．２０ｇ／Ｌ,该菌株的产苷能力比在原发酵培养基中的产苷能力提高了１０％ 。从而证明均匀设计实验所给回归模型对发酵条件的选择具有重要的指导意义。     

固定化胰蛋白酶水解酪蛋白及亲和吸附提取磷肽

磷肽与钙离子结合成可溶性的磷肽钙，是最易为人体吸收的磷钙营养素．又是无毒有效的龋齿防治剂．本文用固定化胰蛋白酶在ｐＨ８．０的硼酸缓冲液中，４０℃条件下水解酪蛋白，经ＳＤＳ聚丙烯酰胺凝胶电泳及葡聚糖Ｇ—１５０凝胶层析分析，其最适水解时间为１０ｈ．用硫氨络铁凝胶珠在ｐＨ４．０醋酸缓冲液含０．５ｍｏｌ／ＬＫ２ＳＯ４条件下亲和吸附磷肽，用ｐＨ７．６Ｔｒｉｓ—ＨＣｌ缓冲液洗脱，磷肽的吸附量为１．７ｍｇ／ｍＬ湿珠．每克磷肽含磷量为５５．５ｍｇ．每克酪蛋白的含磷量为６．９ｍｇ．磷肽的含磷量是酪蛋白的８倍．     

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