反相高效液相色谱法测定治咳枇杷露中乌索酸的含量

建立了反相高效液相色谱法测定枇杷露中乌索酸的含量,同时采用光电二极管阵列检测器检测乌索酸色谱峰的纯度。色谱柱为Nova-Pak C18(3.9×150 mm,4μm),流动相为甲醇-水(88∶12),流速1.0 mL/m in,检测波长210 nm,柱温25℃。乌索酸在0.039 5~0.237μg范围内线性关系良好(r=0.999 1),检出限为0.2 mg/L(3σ),平均回收率为98.7%。该法适于对含有乌索酸的药物进行质量评价。     

高效液相色谱-质谱法测定亚贡叶中亚贡二萜酸A和C的含量

建立了同时测定亚贡(Smallanthus sonchifolius)叶中亚贡二萜酸A和C含量的方法.采用高效液相色谱-质谱法,多反应监测(MRM)模式,大黄素为内标,色谱柱:UltimateTM XB-C18(150mm×4.6mm,5μm);流动相:V(甲醇)∶V(0.5%醋酸水溶液)=90∶10;流速:1.0mL/min;柱温:25℃.亚贡二萜酸A和C的线性范围均为0.2～10.0μg/mL(r≥0.999),平均加样回收率(n=6)分别为96.6%和92.4%,相对标准偏差(RSD)分别为1.9%和3.2%.实验数据表明,该方法操作简单、准确,且重复性好,可用于亚贡叶的质量控制.     

Quantitative Determination of Smaditerpenic Acids A and C in Leaves of Smallanthus sonchifolius by HPLC-MS

建立了同时测定亚贡(Smallanthus sonchi olius)叶中亚贡二萜酸A和C含量的方法.采用高效液相色谱-质谱法,多反应监测(MRM)模式,大黄素为内标,色谱柱:UltimateTM XB-C18(150 mm×4.6 mm,5μm);流动相:V(甲醇)∶V(0.5％醋酸水溶液)=90∶10;流速:1.0 mL/min;柱温:25℃.亚贡二萜酸A和C的线性范围均为0.2～10.0 μg/mL(r≥0.999),平均加样回收率(n=6)分别为96.6％和92.4％,相对标准偏差(RSD)分别为1.9％和3.2％.实验数据表明,该方法操作简单、准确,且重复性好,可用于亚贡叶的质量控制.     

反相高效液相色谱法测定太太美容口服液中阿魏酸的含量

建立了太太美容口服液中阿魏酸含量的HPLC测定方法.色谱柱为Shim-PackVP-ODS柱(150mm×4·6mm,5μm);流动相为甲醇水冰醋酸(32∶66∶2);流速1mL/min;323nm处进行检测.阿魏酸的线性范围为0·252~5·04μg/mL,r=0·9993,平均回收率为99·9%(n=5),相对标准偏差为1·2%.实验证明该方法简便、快速、准确,适合于太太美容口服液中阿魏酸含量的测定.     

苗药五香血藤的质量测定

目的:建立五香血藤药材的质量测定,为五香血藤的质量标准研究和修订提供借鉴基础。方法:测定药材水分、总灰分和酸不溶性灰分;采用高效液相色谱法测定药材中五味子乙素的含量:色谱柱为Eclipse XDB-C18,流动相为乙腈-水(80∶20,V/V),流速为1.0 m L/min,检测波长为235 nm,柱温为30℃,进样量为20μL。结果:药材水分为10.74~14.49%,总灰分为2.12~4.30%,酸不溶性灰分为0.18~3.16%。五味子乙素检测进样量线性范围为2.10~12.62μg(r=0.9999);精密度、稳定性、重复性试验的RSD≤3%;五香血藤素加样回收率为102.27%(RSD=2.6%)。结论:该研究所建标准可用于五香血藤药材的质量控制。     

HPLC法测定三种蒙成药中盐酸小檗碱的含量

目的:采用高效液相色谱法测定以黄柏为主要成分的三种蒙成药(协日毛道-8、特木仁-5、协日嘎-4)中盐酸小檗碱的含量.方法:色谱柱为Xterra(5μm×150 mm×3.9 mm)柱;流动相为甲醇-0.02 mol/L磷酸-水-乙腈(10∶30∶30∶30,V/V);检测波长为345 nm.结果:回归方程y=3.408×106x-1.04×105,r=0.9997,CV(%)=1.03(n=5).线性范围0.005 mg/g~5.450 mg/g.协日毛道-8,特木仁-5,协日嘎-4中盐酸小檗碱的含量分别为0.93 mg/g、0.65 mg/g、2.96 mg/g,平均回收率为98.88%.结论:本方法简便、可靠,适合蒙药中盐酸小檗碱的含量测定.     

HPLC法测定克糖片剂中的槲皮素

测定克糖片剂中槲皮素的质量比.采用高效液相色谱法,Hypersil C18柱,流动相为甲醇-0.3%磷酸(60∶40,V∶V),流速为1.0 mL/min,柱温为室温,柱长为250 mm,检测波长为360 nm.槲皮素的线性范围为0.2~1.0μg(r=0.999 9),槲皮素的平均加样回收率为99.57%(RSD为0.51%).最终计算得出平均含槲皮素0.052 7 mg/片,RSD为0.48%.本方法可简便快捷的测得克糖片剂中槲皮素的质量比.     

高效液相色谱法检测5α-还原酶活性

建立一种简便快速的5α-还原酶活性检测方法.采用高效液相色谱法(HPLC)测定酶促反应中底物睾酮(T)量的变化,以此反映酶活性的高低.该方法可用于5α-还原酶抑制剂的高通量体外筛选(HTS).方法的色谱条件为色谱柱:BondapakC18(4.6mm(i.d)×300mm,Waters);流动相中甲醇∶水=70∶30(V V);流速为0.5mL·min-1;紫外检测波长为242nm;柱温32℃;T的线性范围在6-300ng·mL-1,相关系数为0 9992;最小检测限为3ng.     

高效液相色谱法测定苯并三嗪-1,4-二氧化物衍生物SR-H22及其有关物质

建立了测定苯并三嗪-1,4-二氧化物衍生物SR-H22的含量及有关物质的高效液相色谱方法。采用Dikma Diamonsil C_(18)(250 mm×4.6 mm,5.0μm)色谱柱;流动相A为乙腈,流动相B为水;流速:1.0 m L·min~(-1);等度洗脱,A-B(25∶75,V/V),检测波长为243 nm;进样体积:10μL。在上述色谱条件下,各杂质及各降解产物均可与SR-H22主峰良好分离,HPLC测定的线性范围为0.1~1.5μg(r=0.999 8),方法中仪器精密度、日内精密度、日间精密度及重复性的RSD均小于2%。采用HPLC测定SR-H22含量及有关物质,方法简便,结果准确可靠。     

高效液相色谱同时测定何首乌中大黄酸、大黄素和大黄酚的含量

采用高效液相色谱法建立了同时测定何首乌中大黄酸、大黄素、大黄酚三种蒽醌类化合物的方法,样品采用超声波法提取,色谱柱为Phenomenex C18(250mm×4.6mm,5μm);流动相为甲醇-0.4%醋酸水溶液(80∶20);流速0.80mL/min;紫外检测波长254nm;柱温为35℃.结果:该方法对大黄酸、大黄素和大黄酚分别在0.0001~12.50μg/mL、0.0002~25.00μg/mL、0.00018~22.50μg/mL范围内线性关系良好,相关系数(r)均大于0.9999,定性检测限(S/N=3)依次是:0.0703ng/mL、0.0282ng/mL、0.0871ng/mL;样品回收率为88.39%~107.2%.结论:本法操作简单快速、定量准确、灵敏度高、成本低,为何首乌中蒽醌类化合物的检测分离及含量测定提供了一个有效的科学方法.     

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.