5种新分离细菌的分子鉴定及分类

测定和比较了５种新分离细菌的１６ＳｒＤＮＡ序列,并对其进行分子鉴定和分类．结果表明：Ｆ５７７１和Ａ５６０８为棒杆菌属（Ｃｏｒｙｎｅｂａｃｔｅｒｉｕｍ）的２个新种;ＬＣＤＣ８９０５５是１种放线菌,与Ａｃｔｉｎｏｍｙｃｅｓｐｙｏｇｅｎｅｓ遗传距离较近;而ＬＣＤＣ８７０８０和ＣＤＣｇｒｏｕｐＡＮＦ１ｌｉｋｅ则分别为Ａｎｅｕｉ和Ｔｕｒｉｃｅｌａｏｔｉｔｉｄｉｓ菌的不同菌株．     

Western-blot方法分析人甲状腺及其肿瘤组织中bFGFs

目的：研究人甲状腺瘤的发生分期ｂＦＧＦｓ（ｂａｓｃ Ｆａｂｒｏｂｌａｓｔ Ｇｒｏｗｔｈ Ｆａｃｔｏｒｓ）基因异常表达的关系。方法：采用Ｗｅｓｔｅｒｎ－ｂｌｏｔ方法对人甲状腺及其肿瘤组织来源的ｂＦＧＦｓ进行分析研究。结果：人正常甲状腺组织来源的ｂＦＧＦｓ分子量为１７ＫＤ和１８ＫＤ,而人甲状腺肿瘤组织来源的ｂＦＧＦｓ为１４ＫＤ、１７ＫＤ和１８ＫＤ。结论：１４ＫＤｂＦＧＦｓ的出现提示人甲状腺肿瘤的发生和发展可能与ｂＦＧＦｓ的基因异常表达有关。     

我国部分兰科植物菌根的内生真菌种类研究

对产于我国云南和福建的３６种兰科植物菌根的内生真菌进行了研究,从中分离隶属于半知菌亚门（Ｄｅｕｔｅｒｏｍｙｃｏｔｉｎａ）丝孢纲（Ｈｙｐｈｏｍｙｃｅｔｅｓ）真菌菌株１０２个,包括在１３个属内;腔孢纲（Ｃｏｅｌｏｍｙｃｅｔｅｓ）真菌菌株１个,属盘多毛孢属（Ｐｅｓｔａｌｏｔｉａ）。文中对已定名及未定名各种进行了描述。     

酵母FD_1菌株的定种研究

通过对分离获得的酵母ＦＤ１的形态、生理、生化、生态等方面的实验与分析，确认该菌株为酿酒酵母（Ｓａｃｅｈａｒｏｍｙｃｅｓｃｒｅｖｉｓｉａｅ）种群的一株应用型酵母。     

纤维毛壳菌玉米秸发酵饲料的系统毒理分析和营养价值测定

玉米秸经纤维毛壳菌（Ｃｈａｅｔｏｍｉｃｕｍ ｃｅｌｌｕｌｏｌｙｔｉｃｕｍ）ＳＭ－２７发酵后制成的纤维蛋白饲料（Ｆｅｒｍｅｔｅｄ ｐｒｏｄｕｃｔ ｏｆ ｃｏｒｎ ｓｔａｌｋ，ＦＰＣＳ）作为日粮中的粗蛋白源，喂饲白鼠和白兔，进行了系统的毒理分析和营养价值测定。毒理测试包括急性毒性试验（ＬＤ５０测定和７ｄ喂养试验），畜积毒性试验、致突变试验、９０ｄ喂养毒性测定等，结果表明ＦＰＣＳ的ＬＤ５０对瑞士小白鼠和     

果蝇姊妹种间亲缘关系的聚类分析

本文以聚丙烯酰胺凝胶电泳（ＰＡＧＥ）技术分析了金色果蝇复合种（Ｄｒｏｓｏｐｈｉｌａａｕｒａｒｉａｓｐｅｃｉｅｓｃｏｍｐｌｅｘ）的５个姊妹种共１７个地理种群及其它种类的５个地理种群的８种同工酶酶谱，根据其中７种酶（Ａｍｙ、Ａｏ、Ｅｓｔ、α－Ｇｐｄｈ、Ｍｄｈ、Ｍｅ、Ｔｙｒ、Ｔｏ）的条带特征按Ｆｏｒｇｕｓｏｎ及Ａｑｕａｄｏ　＆Ａｖｉｓｅ的公式分别计算遗传相似系数及遗传距离，以类平均法（ＵＰＧＭＡ）进行了聚类分析，绘制出８个种类共２２个地理种群的生化系统树，结合姊妹种间无选择杂交可能组合的结果讨论了ａｕｒａｒｉａｓｐｅｃｉｅｓｃｏｒｎｐｌｅｘ各姊妹种间的亲缘关系、种化模式及分布在日本Ｋａｍｅｔｏｋｕ岛上的Ｄ．ｔｒｉａｕｒａｒｉａ发生分化的可能性。     

酵母菌 ND-60 菌株产 SOD 特性的研究

对酿酒酵母菌株（Ｓａｃｈａｒｏｍｙｃｅｓｃｅｒｅｖｉｓｉａｅ，编号为ＮＤ－６０）产超氧化物歧化酶的特性进行了研究，确定了摇瓶培养ＮＤ－６０生产超氧化物歧化酶的最适工艺条件。以ＮＤ－６０菌株为材料，研究了细胞中的线粒体与细胞中超氧化物歧化酶活性的关系，实验结果表明：ＮＤ－６０菌体细胞中线粒体的存在对整个细胞中超氧化物歧化酶活力的大小有着重要影响，线粒体的存在有助于提高细胞中超氧化物歧化酶的活力，而线粒体本身也含有较高的超氧化物歧化酶比活力。     

极大螺旋藻藻蓝蛋白性质的研究

用凝胶电泳、吸收光谱、荧光光谱、示差扫描量热计（ＤＳＣ）和循环伏安法研究了极大螺旋藻（Ｓｐｉｒｕｌｉｎａｍａｘｉｍａ）藻蓝蛋白的性质，结果表明：该蛋白由大小两个亚基组成，分子量分别为１９ＫＤ和１７ＫＤ。吸收光谱显示，该蛋白在３４８ｎｍ和６２０ｎｍ有吸收峰。其荧光发射峰位于６４６ｎｍ。该蛋白的热变性温度范围在４０℃～５４℃附近。该蛋白的循环伏安扫描曲线显示，当扫描速度为０．１Ｖ／ｓｅｃ时，有一个明显的氧化峰。当扫描速度大于０．２Ｖ／ｓｅｃ时，呈现两个氧化和两个还原峰     

猫儿尿植物的化学成分及其药效学研究

首次从木通科猫儿尿（ＤｅｃａｉｓｕｅａｆａｒｇｅｓｉｉＦｒａｎｃｈ）中分离鉴定了１１种皂甙化合物，经光谱分析及化学方法鉴定，其中５种化合物为新化合物，分别命名为：ＤｅｃａｉｓｏｓｉｄｅＡ，Ｂ，Ｃ，Ｄ，Ｇ；另５种化合物为ＳａｐｏｎｉｎＰＧ，ＤｉｐｓａｃｏｓｉｄｅＢ，Ｋａｌｏｐａｎａｘ－ｓａｐｏｎｉｎＢ，Ｓａｐｏｎｉｎ１１，ＨｅｄｅｒａｓａｐｏｎｉｎＢ和ｓａｐｏｎｉｎＰＪ３，猫儿尿对小鼠移植性肿瘤Ｓ１     

两个分离菌株对2，4-D降解效率的微生态系统模拟

在微生态系统模拟条件下,２个分离菌株Ｓｐｈｉｎｇｏｍｏｎａｓ ｐａｕｃｉｍｏｂｉｌｉｓ ９２５６,Ｒａｌｓｔｏｎｉａ ｅｕ－ｔｒｏｐｈｕｓ ＪＭＰ表现出对除草剂２,４－Ｋ的高效降解性能。但Ｒ．ｅｕｔｒｏｐｈｕｓ ＪＭＰ能在更多的模拟条件下成为优势种群。对２个菌株的种肖长影响最大的生态因子是湿度和２,４－Ｄ的浓度。种群增长与２,４－Ｄ降解有约２４ｈ的时滞;种群的增长量不完全受底物２,４－Ｄ消耗的多少     

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.     

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.     

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