生物反应器高密度异培养小球藻

首先用摇瓶实验确定异养流加分批培养小于藻中起始葡萄糖及ＫＮＯ３的适宜浓度与增加葡萄糖及ＫＮＯ３浓度的控制范围和补料中最适Ｃ／Ｎ值,培养其中起始添加１０ｇ．Ｌ＾－１葡萄糖和１．６ｇ．Ｌ＾－１ＫＮＯ３较适宜。在此前提下,流加分批培养时葡萄糖和ＮＯ＾－３质量浓度应分别控制在６．１７－２．４５ｇ．Ｌ＾－１和≤０．４４ｇ．Ｌ＾－１,补料液中最适Ｃ／Ｎ值为４１．２。据此结果,经５Ｌ通风搅拌反应器放大培养实验,     

从石油中间产品合成表面活性剂AS-4Ⅰ.AS-4水溶液与原油体系的界面活性

以石油中间产品为原料,合成了烃基苯磺酸盐表面活性剂ＡＳ－４。考察了盐浓度,碱浓度和ＡＳ－４ 浓度对ＡＳ－４ 水溶液与原油体系的动态界面张力的影响。结果表明,当Ｎａ２ＳＯ４ 浓度为５～１５ｇ／Ｌ,ＮａＯＨ 浓度为５～１０ｇ／Ｌ,ＡＳ－４ 浓度为０．１～０．５ｇ／Ｌ的条件下,ＡＳ－４ 水溶液与原油体系的动态界面张力具有１０－ ３ｍ Ｎ／ｍ 以下的超低最小值。还研究了ＡＳ－４ 表面活性剂的组成（不同的异构体）对其水溶液与原油体系的动态界面张力的影响。     

红豆杉细胞植板方法的研究

在红豆杉细胞植板中、适宜的培养基是优化的ＭＳ培养基,其中ＮＡＡ浓度为０．５ｍｇ／Ｌ,６ＢＡ浓度为０．５ｍｇ／Ｌ,培养细胞生长周期为４０ｄ;培养在中最优碳源浓度是：蔗糖３０ｇ／Ｌ,葡萄糖１０ｇ／Ｌ,无机盐最佳浓度是：ＮＨ＾＋４１０ｍｍｏｌ／Ｌ,ＮＬ＾－３４０ｍｍｏｌ／Ｌ,ＰＯ＾３－４１．２５ｍｍｏｌ／Ｌ。研究表明,培养基的ｐＨ值与植板率在。氨基酸及维生素等有机成分能明显促进细胞生长。     

从石油中间产品合成表面活性剂AS—4：Ⅰ.AS—4水溶 …

以石油中间产品为原料,合成了烃基苯磺酸盐表面活性剂ＡＳ－４。考察了盐浓度,碱浓度和ＡＳ－４浓度对ＡＳ－４水溶液与原油体系的动态界面张力的影响。结果表明,当Ｎａ２ＳＯ４浓度为５－１５ｇ／Ｌ,ＮａＯＨ浓度为５－１０ｇ／Ｌ,ＡＳ－４浓度为０．１－０．５Ｇ     

大叶相思体细胞胚胎发生的初步研究

以种子萌发的无菌苗下胚轴为外植体，在Ｂ５＋２，４－Ｄ（１０－４ｍｏｌ／Ｌ）＋ＢＡ（１０－６ｍｏｌ／Ｌ）＋ＣＨ０．５ｇ／Ｌ的固体培养基上培养４周，获得了胚性愈伤组织．该愈伤组织经Ｂ５＋２．４－Ｄ（１０－４ｍｏｌ／Ｌ）的液体培养基７ｄ的诱导在Ｂ５＋Ｌ－谷氨酰胺（２００ｍｇ／Ｌ）＋ＣＨ（０．５ｇ／Ｌ）的液体培养基上培养１４ｄ产生了球形胚．球形胚具有明显的两极，但只是根端发育，苗端并没有发育     

利用异养型微藻生产DHA

本研究旨在筛选高产ＤＨＡ的异养型微藻种．以含有５ｇ／Ｌ葡萄糖的Ｐｏｒｐｈｙｒｉｄｉｕｍ培养基为初始培养基,对四株异养双鞭藻———Ｃｒｙｐｔｈｅｃｏｄｉｎｉｕｍｃｏｈｎｉ进行摇床培养筛选．其中ＣｒｙｐｔｈｅｃｏｄｉｎｉｕｍｃｏｈｎｉＡＴＣＣ３０５５６的比生长速率（０．０６７／ｈ）、生物量（２．０４６ｇ／Ｌ）以及ＤＨＡ产量（１５９ｍｇ／Ｌ）均为最高．筛选结果表明,该藻种具有进一步研究的意义及进行工业化生产的可能．     

红豆杉细胞植板方法的研究

在红豆杉细胞植板中,适宜的培养基是优化的ＭＳ培养基,其中ＮＡＡ浓度为０．５ｍｇ／Ｌ,６ＢＡ浓度为０．５ｍｇ／Ｌ;培养细胞生长周期约４０ｄ;培养基中最优碳源浓度是：蔗糖３０ｇ／Ｌ、葡萄糖１０ｇ／Ｌ．无机盐最佳浓度是：ＮＨ＋４１０ｍｍｏｌ／Ｌ,ＮＯ－３４０ｍｍｏｌ／Ｌ,ＰＯ３－４１．２５ｍｍｏｌ／Ｌ．研究表明,培养基的ｐＨ值与植板率密切相关．氨基酸及维生素等有机成分能明显促进细胞生长．来自细胞悬浮培养物的条件培养基能显著地促进红豆杉培养细胞的单细胞在低密度植板时的克隆形成     

红豆杉愈伤组织的诱导和培养

研究了不同的基本培养基、不同的激素种类和不同的种植体对红豆杉愈伤组织诱导的影响。实验结果表明,在愈伤组织诱导中,２ｍｇ／Ｌ ２,４－Ｄ的诱导效果优于２ｍｇ／Ｌ ＮＡＡ,枝段的诱导率高于叶片。Ｂ５和ＨＥ培养基利于愈伤组织的诱导,Ｂ５和６,７－Ｖ培养基利于愈伤组织的生长,其平均生长速率分别为０．９９ｇ／（Ｌ·ｄ）和０．６０ｇ／（Ｌ·ｄ）。     

混合培养发酵L-苹果酸的研究

采用Ａ－２３菌株和Ｖ－８１菌株混合培养发酵Ｌ－苹果酸,分别探讨碳源浓度对Ａ－２３菌株和Ｖ－８１菌株发酵水平的影响,试验表明,Ａ－２３菌株产延胡索酸能力强,Ｖ－８１菌株具有高活性延胡索酸酶,在此基础上,研究Ａ－２３菌株和Ｖ－８１菌株混合培养方式对发酵Ｌ－苹果酸的影响,结果表明,Ａ－２３菌株接入含有１５０ｇ．Ｌ＾－１葡萄糖混合发酵培养其中培养３ｄ,后接入Ｖ－８１菌株并继续培养２ｄ。产酸水平最高,Ｌ－苹     

FD-TRT耐热逆转录酶的特性分析

从嗜热细菌ＦＤ３００９中克隆并分离纯化得到的耐热逆转录酶（ＦＤ－ＴＲＴ）,逆转录反应在６５℃高温下进行,可克服常温逆转录酶的许多缺点,以酵母核糖体ｒＲＮＡ为模板,以与２５５和１８Ｓ ｒＲＮＡ匹配的寡聚脱氧核苷酸为引物,探明了ＦＤ－ＴＲＴ的最适反应条件： ２５ｍｍｏｌ／Ｌ Ｔｒｉｓ－ＨＣｌ（ｐＨ ８．５,２５℃）,２５ ｍｍｏｌ／Ｌ（ＮＨ４）２ＳＯ４,２ ｍｍｏｌ／Ｌ ＭｎＣｌ２,１００ μｇ／ｍｌ明胶．５ ｕｎｉｔ ＲＮａｓｉｎ,２５０ ｍｍｏｌ／Ｌ ４种 ｄＮＴＰ, １μＣｉ３ Ｈ－ｄＣＴＰ, １２ｕｇ ＲＮＡ,２５ ｐｍｏｌ引物,并在此条件下测得 ＦＤ－ＴＲＴ和 Ｔａｑ ＤＮＡ 聚合酶逆转录活力与聚合酶活力的相对比值分别为０．０５６,０．００４５．     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-