藏药翁布提取物对CCl_4所致小鼠肝损伤的保护作用研究

本文研究藏药翁布(Myricarica paniculata P.Y.Zhang et Y.J.Zhang)提取物对CCl4所致小鼠急性肝损伤的影响.结果显示藏药翁布可显著降低小鼠血清中的ALT、AST活力(P0.001),提高肝脏中SOD活性(P0.05),降低LPO的含量(P0.01).说明藏药翁布对CCl4所致的肝损伤有一定的保护作用.     

藏药翁布对细胞免疫功能的影响及其毒性试验研究

目的:研究单味藏药翁布(Myricariagermanica(L.)Desv.)对细胞免疫功能的影响及毒理。方法:以小白鼠为实验动物,采用动物模型及毒理学研究方法,测定藏药翁布水提物对小鼠的胸腺和脾脏指数、廓清率及ig最大耐受量、ip给药LD50。结果:藏药翁布水提物可提高胸腺指数(P<0 05)和脾脏指数(P>0 05),增加单核吞噬细胞系统廓清功能;ig最大耐受量为120g·kg-1(生药),ipLD50为4 4482±0 0329g·kg-1,可信限为3 8342-5 1599g·kg-1。结论:藏药翁布有免疫增强作用,并且安全范围大,毒副作用很小.     

藏药翁布提取物对SD大鼠FCA诱导性关节炎的试验研究

目的：研究单味藏药翁布（Myricaria germanica（L.）Desv.）对SD大鼠佐剂性关节炎（AA）的作用.方法：以SD大鼠为实验动物,采用Freund’s佐剂作为致炎因子,复制急性关节炎症并伴随继发性风湿性关节模型,用不同提取物灌胃24d,测定体重、关节炎指数、足趾肿胀度.结果：藏药翁布各提取物显著抑制SD大鼠关节炎指数、足趾肿胀度.结论：藏药翁布提取物对Freund’s佐剂诱导性关节炎有显著的抗炎作用.     

藏药旺拉的化学成分及药理活性的研究进展

藏药旺拉是藏蒙地区的民族传统药物之一,它具有很高的药用价值.本文就目前对旺拉的化学成分以及药理作用的研究进展作一综述,为该药物的进一步研究和开发利用提供理论依据.     

青藏高原甘南地区牻牛儿苗科藏药植物资源调查研究

采用实地访查、查阅资料和采集标本等方法,研究青藏高原甘南地区牻牛儿苗科藏药植物资源的区系及药用价值.调查结果表明,青藏高原甘南地区牻牛儿苗科藏药植物共有3属6种,其生活型主要为多年生草本.牻牛儿苗科藏药植物是我国藏药植物的主要类群,其药用价值极其高,甘南地区共有3属6种.藏药植物体能积累大量的生物活性物质,在医药开拓方面具有广阔的前景.     

藏药翁布挥发油抗炎镇痛实验研究

目的：探讨藏药翁布挥发油的抗炎和镇痛作用.方法：应用二甲苯致小鼠耳廓肿胀、醋酸致小鼠腹腔毛细血管通透性及小鼠肉芽组织增生法进行抗炎药效学实验;通过醋酸扭体法,小鼠热板法观察其镇痛效果.结果：翁布挥发油高、中、低剂量均能抑制二甲苯引起的小鼠耳廓炎症,醋酸致小鼠腹腔毛细血管通透性亢进及棉球诱发小鼠肉芽增生;同时能明显减少醋酸致小鼠扭体反应次数;小鼠热板反应痛阈值延长.结论：翁布挥发油具有明显的抗炎和镇痛作用.     

藏药唐古特青兰的化学成分和生物活性研究进展

藏药唐古特青兰(Dracocephalum tanguticum Maxim)可治疗胃炎、肝炎、头晕、关节炎及疖疮等症.通过现代研究手段表明该植物含有黄酮、三萜、苯乙酰胺糖苷、苯丙素、挥发油、多糖等多种化学成分,有显著的抗缺氧、抗心肌缺血、抗糖尿病、预防心脏毒性和抗癌等活性.综述了唐古特青兰化学成分及生物活性研究进展,为进一步研究开发该藏药提供一定的研究基础.     

锁阳的化学成分及药理作用

锁阳（Cynomorium songaricum Rupr）为锁阳科全寄生种子植物,多寄生于蒺藜科白刺属植物根部.本文探讨近现代关于中药锁阳的化学有效成分、药理活性、药用价值等方面的研究成果,并对其进行总结,为今后合理开发锁阳药用资源、临床用药安全和质量控制提供科学依据,为更深一步的化学成分分析和药理活性研究作基础.     

珊瑚姜化学成分及精油研究开发进展

珊瑚姜是少数民族的一种民间习用药物,具有很大的潜在药用价值,对2003年以来珊瑚姜化学成分及精油的研究与开发进展进行了综述,指出深入研究珊瑚姜的非挥发油化学组分,寻找其有用的活性物质,开辟新的药用价值是其今后的研究方向。     

藏药化学成分的研究

介绍近年来藏药化学成分的研究状况,对近年来藏药化学成分的研究文献进行归类分析,研究表明,藏药化学成分的研究取得了较大进展,但在研究的深度和广度上,还有待进一步提高。     

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-