独行菜属植物的化学成分和药理作用研究进展

本文着重阐述和归纳了独行菜属植物化学成分和药理活性方面的研究进展.现已从独行菜属植物分离得到芥子油苷、黄酮、三萜、甾醇、鞣质、香豆素、生物碱、酚酸、挥发油、脂肪油和氨基酸等化学成分.该属所含的成分具有降血压、降低细胞毒性、降血糖、提高生育力、抗衰老和抗氧化等药理活性,对胃肠疾病和咳嗽气喘的治疗有显著功效.独行菜属植物种类较多,但除独行菜,家独行菜,玛咖和宽叶独行菜等几个主要种外,对该属其他植物的化学和药理作用研究较少,有待进一步研究.     

新疆眼子菜属一新种

作者于１９８９年夏秋率国家环保局“全国水生植物调查组”在青海和新疆工作期间，于新疆喀什地区发现一种貌似蓼叶眼子菜的眼子菜，但其花柱具腹翅，长与柱头齐；死被片基部下垂，柄紫黑色而粗糙，果具背脊和腹脊，均等长于果嘴，和属内其他种俱不相同，作者认为此系该属的新种，特命名为喀什眼子菜。     

獐牙菜属植物研究进展

目的:综述近几年獐牙菜属植物的研究进展,以确定后期的研究方向和重点.方法:系统查阅近10年的国内外有关獐牙菜属植物化学成分和药理活性的文献资料进行分析、概括和总结.结果:獐牙菜属植物中分离得到的化学成分主要有(口山)酮类、环烯醚萜类、三萜类、黄酮类等,其所含化学成分具有保肝、抗炎、降血糖、抗氧化、抗疟等多种生理活性.结论:进一步研究和开发利用该属植物具有广阔的前景.     

中国眼子菜属一新种

近年来在四川、黑龙江和新疆等省、自治区发现眼子菜属一个新种，该新种因具异枝异叶，被命名为异枝眼子菜（新种）；其果具相同的背腹脊（棱）各一条；嘴小，背曲如钩；被片果时变厚硬而绿色；鲜果球形，干后果皮的在皮细胞呈多角形，而不同于属内其他种类。且生态变异幅度大，生丛密杂草之空隙中者，无浮泛叶，正常开花结果；生近岸波动之浅水中者，则通常不分枝。     

新疆眼子菜属一新种

作者于１９８９年夏秋率国家环保局“全国水生植物调查组”在青海和新疆工作期间，于新疆喀什地区发现一种貌似蓼叶眼子菜（ＰｏｔａｍｏｇｅｔｏｎＰｏｌｙｇｏｎｉｆｏｌｉｕｓＰｏｕｒｒ．ｎｏｎＦｒ．ｅｔＳａｖ．）的眼子菜，但其花柱具腹翅，长与柱头齐；死被片基部下垂，柄紫黑色而粗糙；果具背脊和腹脊，均等长于果嘴，和属内其他种俱不相同。作者认为此系该属的新种，特命名为喀什眼子菜（ＰｏｌａｍｏｇｅｌｏｎＫａｓｈｉｅｎｓｉｓＤｉａｏ）。     

苦苣菜属植物的化学成分及药理作用研究进展

苦苣菜属(Sonchs)植物全世界约有50种,在民间作为重要的药用植物使用.本文对我国该属8种植物的化学成分及药理作用进行综述,并对该属植物的研究提出展望.     

香茶菜属植物的研究现状及药用前景

香茶菜属植物全世界大约有150种，已研究品种达80种。香茶菜属植物具有抗肿瘤及抗菌消炎作用，其生物活性物质是二萜类化合物。本文对香茶菜属植物的研究现状、抗肿瘤机理及药用功能进行了概括，并对其药用功能的开发利用提出看法。     

牛奶菜属植物化学成分及药理活性研究进展

文章对萝肇科（Asclepiadanceae）牛奶菜属（Marsdenia）植物的化学成分和药理活性研究情况进行综述。总结出萝摩科牛奶菜属合有多种活性成分,主要有孕甾烷类、糖类、三萜类、甾醇类等,其药理作用主要体现在抗癌、抗生育等方面,为萝蘑科牛奶菜属植物的研究与开发提供了参考。     

内蒙古菊科一新记录属——假小喙菊属

内蒙古植物志第二版菊科中阿拉善黄鹌菜应为假小喙菊属的假小喙菊，该属为内蒙古菊科一新记录属。     

山西十字花科山嵛菜属植物新记录——密序山萮菜

2021年6月对山西野生植物资源科学考察时，在五台山采集到山西十字花科（Brassicaceae）山嵛菜属（Eutrema R. Br.）密序山嵛菜（Eutrema heterophyllum (W. W. Sm.) H. Hara），为山嵛菜属植物增加了1个种级水平的新记录。迄今为止山西记录山嵛菜属植物2种。     

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-