胡子鲶(Claris fuscus Lacepede)消化道组织学的初步研究

对胡子鲶（Claris fuscus Lacepede）消化系统中消化道，即：食道，胃，肠及肛门口等组织学结构特点进行了初步观察和研究，结果表明，胡子鲶和鲤科（Cyprinidae）鱼类的消化道组织学结构特点有相同之处，但也有不同之处，主要报道了这方面的研究成果，为今后鲶亚目（Sil-uroidei)鱼类的进一步研究和养殖，提供一定的参考资料。     

胡子鲶（Claris fuscus Lacepede）雄性泌尿系统组织学的观察研究

对胡子鲶（Claris fuscus Lacepede)泌尿系统，即肾脏、输尿管、膀胱以及尿道的组织学特征进行了初步观察和研究。结果表明，胡子鲶泌尿系统组织学特征与鲤科（Cyprinider）鱼类泌尿系统组织学特征大致相同，但也有一定区别。为今后鲶亚目（Siluroidei)鱼类的研究和养殖，提供一定的参考资料。     

胡子鲶(Claris fuscus Lacepede)味觉器官的数量、分布与功能之间关系的研究

胡子鲶(Claris fuscus Lacepede)是一种热带及亚热带鱼类，生活在淡水水域中，主要生活在阴暗处及洞穴中，以肉食性为主，主要捕食小鱼、小虾、小型软体动物以及水生昆虫的成虫和幼虫等。因此，它的味觉器官——味蕾的数量、分布、功能与它的生活环境及食性有着密切的关系，这方面的研究成果，为今后养殖胡子鲶科(Clariidae)鱼类，提供一定的参考资料。     

锦鲤和胡子鲶鳃丝及鳃小片亚微结构特征扫描电镜比较研究

应用扫描电镜对锦鲤和胡子鲶鳃丝及鳃小片亚微形态结构进行详细的观察比较研究,结果表明：锦鲤和胡子鲶的鳃丝及鳃小片结构具有很大的差异．锦鲤鳃丝上皮细胞表面有环形隆嵴、连续不断的线纹、短纹和点纹,而鳃小片上皮细胞表面凹凸不平,不具有沟、回等结构．胡子鲶鳃丝上皮细胞表面也生有环形隆嵴、短纹和点纹,而鳃小片上皮细胞表面没有隆嵴和刻纹．这些形态结构特征与鳃功能机理密切相关．     

胡子鲶（Claris fuscus Lacepede）肝脏、胆囊以及胰脏组织学的初步研究

胡子鲶（Claris fuscus Lacepede）是我国长江流域以南的淡水水域所产鱼类,杂食性,但以肉食性为主,容易进行人工饲养,本篇研究旨意：主要是探讨该鱼消化系统中的主要消化腺,即肝脏、胆囊及胰脏的组织学结构特点,与鲤科（Cyprinidae）鱼类比较,有相同之处,但也有独特之处,主要报道之方面的研究成果,为今后鲶亚目（Siluroidei）鱼类的进一步研究和养殖提供一定的科学依据。     

革胡子鲶精巢的定量组织学研究

革胡子鲶（Ｃｌａｒｉａｓｇａｒｉｅｐｉｎｕｃｂｕｒｃｈｅｎ）１９８１年引入我国，１９９４年引入新疆，通过４年的饲养观察，已基本适应了新疆的自然条件，暖季生长发育良好。为了探明革胡子鲶在非繁殖期精巢的组织学变化，我们利用生物体积学（ＢｉｏｌｏｇｉｃａｌＳｔｅｒｅｏｌｏｇｙ）技术对革胡子鲶的精巢进行了测定研究。革胡子鲶精巢的定量组织学指标的测定结果分别见表１、表２。表１　　革胡子鲶精巢组织学指标及其与绵羊和鸡的差异性比较指　　标革胡子鲶（Ｘ±ＳＤ）革胡子鲶／绵羊革胡子鲶／鸡曲细精管直径／μｍ１５６．…     

鲶类的营养需要和饲料

综述了芒鲶、河鲶，本地胡子鲶，泰国胡子鲶，埃及胡子鲶等鲶类的营养需要量的研究结果。及其饲料生产和饲养效果。给出了“鲶类幼体”和“鲶类成体”的饲料营养含量及其9个配方的饲喂效果。     

鱼的胡子

海鱼中有许多种类的鱼长有胡子,鱼的胡子是一种极为重要的触觉器官。胡子的多少、形状、粗细、长短跟鱼类的生活环境有密切的关系。比如,生活在底层浑浊水中的胡子鲶,它们的胡子特别长,     

我省埃及塘虱鱼的养殖前景

埃及塘虱鱼,学名革胡子鲶(Clariasleather),在鱼类分类学上属于鲶形目,胡子鲶科。革胡子鲶是近二、三年来刚发展起来的淡水养殖新品种,1981年11月由广东省淡水养殖良种场从埃及开罗引进的。根据引进者反映,该鱼在埃及和尼罗河一带普遍饲养,养殖一年体重可达4斤以上。最大个体可达20多斤。这种鱼具有体形大,产量高,耐低氧,抗病害等诸多优良性状。根据宁波市水产养殖公司1983年的生产性试养结果,在我省的自然条件下,当年3—5公分的幼鲶,只     

胡子鲶及其养殖

我们常常接到一些读者的来信或来访,希望能获得一些新的养殖资源。因此,本刊这里特介绍这篇文章。胡子鲶是群众喜欢食用的一种鱼类,但常见于野生,目前广东、广西等地已作为养殖对象,我省各地都有胡子鲶资源,各养殖单位和专业户如有兴趣也不妨试一试。     

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-