维药祖卡木水提液总黄酮的含量测定

采用NaNO2-Al(NO3)3-NaOH体系分光光度法测定维药祖卡木水提液总黄酮的含量。结果表明：维药祖卡木水提液总黄酮平均含量2．12％(n=6),RSD=2．0％;平均回收率达96．26％(n=9),RSD=2．5％。该法简便、快捷、准确,并且不需要专门对总黄酮进行提取、纯化处理,适合于维药祖卡木总黄酮水提液中含量测定。     

毛头牛蒡子总木脂素含量测定

文章测定毛头牛蒡子中总木脂素的含量。利用紫外分光光度计,以牛蒡苷为对照品,在280nm波长下测定总木脂素含量。对照品牛蒡苷在0．0207～0．1101mg／mL（r=0．9992）浓度范围内吸光度与浓度呈良好的线性关系,平均加样回收率98．3％,RSD=1．8％（n=5）。总木脂素平均含量为244mg／g,RSD=2．9％（n=5）。紫外分光光度法测定总木脂素含量,简单,稳定可靠,重现性好。     

紫外-可见分光光度法测定生大黄和醋大黄的总蒽醌含量

目的建立紫外分光光度法测定生大黄和醋大黄总蒽醌的含量。方法以大黄素为对照品,浓度为1%的醋酸镁甲醇溶液对其进行显色,在513 nm波长处测定吸光度,测定生大黄和醋大黄总蒽醌的含量。结果比较其含量差异,揭示大黄炮制前后总蒽醌的含量变化。结论该方法可作为大黄不同炮制品的质量控制方法。     

醋酸镁-甲醇分光光度法测定唐古特大黄中蒽醌类成分的含量

利用蒽醌类成分与醋酸镁反应显红色的特性，用比色法测定唐古特大黄中蒽醌类成分含量。测定结果：唐古特大黄中蒽醌含量在5—30μg／mL范围内，浓度与吸光度之间线性关系良好（r=0．9949）；样品的平均回收率为98．58％，RSD为0．51％（n=5）。说明该方法简便、快速，结果可靠。     

HPLC测定藏药君扎排毒养颜胶囊中大黄素、大黄酚的含量

目的 建立一种反相高效液相色谱法测定藏药君扎排毒养颜胶囊中大黄素、大黄酚含量的方法。方法 用C18ODS柱，以甲醇-0．1％磷酸溶液(85：15)为流动相，检测波长254mm。结果 平均回收率大黄素99．07％(RSD=1．16％，n=4)；大黄酚99．26％(RSD=1．23％，n=4)。结论：该方法简便、快捷、准确。     

HPLC法比较狼毒大戟不同产地游离蒽醌和总蒽醌的质量分数

建立了同时测定狼毒大戟中芦荟大黄素、大黄素、大黄酚、大黄酸和大黄素甲醚5种蒽醌类成分的HPLC法.采用Venusil MP C18(2)柱(4.6mm×250mm,5μm)色谱柱,以甲醇-0.2%磷酸溶液(79∶21)为流动相,流速1.0mL/min,检测波长254nm,柱温30℃.测定了16批狼毒大戟根和地上部分中5种蒽醌类成分的质量分数,结果表明,在线性范围内的线性关系(r0.999 3)及分离度(R1.5)均良好;游离蒽醌平均回收率为96.59%～99.13%,RSD≤1.36%;总蒽醌平均回收率为97.60%～99.46%,RSD≤1.52%.16批狼毒大戟样品中5种蒽醌类成分均可检测到,不同产地、不同部位的狼毒大戟中芦荟大黄素、大黄酸、大黄素、大黄酚、大黄素甲醚量及组成结构比存在较大差异;由聚类分析可知,同一产地、不同居群狼毒大戟根的总蒽醌质量分数并没有聚集在一枝上;同时根的总蒽醌质量分数高于地上部分,云南省香格里拉市格咱乡除外.由此表明,这不仅能比较云南产狼毒大戟不同产地、不同部位中游离蒽醌和总蒽醌的质量分数及组成的差异性,为其药材质量评价和资源合理利用提供科学依据;也为狼毒大戟地上部分的综合利用提供了理论依据.     

HPLC法测定首乌益智胶囊中大黄素和大黄素甲醚的含量

建立了高效液相色谱法(HPLC)同时测定首乌益智胶囊中大黄素和大黄素甲醚含量的方法。采用C18(250 mm×4.6 mm,5 μm)色谱柱,以甲醇 0.1%磷酸水（82：18,V/V）为流动相,检测波长为289 nm,流速为1.0 mL/min,柱温30 ℃。测得大黄素在0.019～0.19 μg（R=0.999 9,n=5）、大黄素甲醚在0.021～0.21 μg（R=1.000 0,n=5）线性关系良好;大黄素和大黄素甲醚的平均回收率分别为98.58％、100.01%,相对标准偏差分别为2.66％、1.15%。研究表明,该方法专属性强、结果准确,可作为同时测定首乌益智胶囊中大黄素和大黄素甲醚含量的方法。     

紫外分光光度法测定贵州马兰总蒽醌含量

目的:测定贵州马兰中总蒽醌的含量。方法:将1,8-二羟基蒽醌对照品溶液和马兰样品溶液于200～400 nm波长范围内进行扫描,确定检测波长为223 nm,建立紫外分光光度计测定贵州马兰中总蒽醌含量。结果:1,8-二羟基蒽醌对照品溶液浓度在2.2～6.05μg/m L的范围内,其浓度与吸光度呈良好的线性关系,C=169.43A-0.1899(r=0.9996);样品加样回收率为98.31%,RSD为2.82%(n=6);贵州马兰中总蒽醌含量为3.146mg/g,RSD为1.60%(n=5)。结论:建立的紫外分光光度法操作简便,重复性良好,可用于马兰中总蒽醌的含量测定;该法可为马兰质量控制和制定质量标准提供参考。     

RP-HPLC法测定虎杖中大黄素的含量

目的：测定中药材虎杖中大黄素的含量。方法：采用RP—HPLC法进行测定。使用C18柱，乙腈—水—冰醋酸(60：40：1)为流动相；检测波长为437nm。结果：大黄素在0．01498～0．07490μg范围内呈良好的线性关系，r=0．9993，平均回收率为99．60％(n=5)，RSD=1．82％。结论：此方法简便，准确灵敏，分离度好，可作为其质量控制指标。     

不同产地五味子中五味子醇甲和总木脂素的含量测定

目的：测定不同产地五味子中五味子醇甲和总木脂素的含量.方法：采用高效液相色谱法和比色法分别测定不同产地五味子中的五味子醇甲和总木质素含量：结果：各地五味子中五味子醇甲的含量均大于药典规定的0．4％,质量均合格,其中以黑龙江省所产五味子中五味子醇甲含量为最高,总木脂素含量以吉林省所产五味子为最高。结论：比色法测定总木脂素含量系本研究的实验结果,HPLC法测定五味子醇甲含量符合药典规定,说明道地药材五味子原产地为东北地区,故习称“北五味子”.     

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

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.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

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

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.