HPLC法对唐松草中盐酸小檗碱的测定研究

采用Waters 1525高效液相色谱仪，用SymmetryShield RP18色谱柱，以乙腈0.05 mol磷酸二氢钾（磷酸调PH为4.5）（20：80）为流动相，于348 nm处测定了唐松草中盐酸小檗碱的含量。结果显示该法具有分析速度快、准确性高、重现性好的优点，为唐松草中盐酸小檗碱的测定提供了可靠的分析方法。     

分光光度法测定蒙药材接骨木中盐酸小檗碱的含量

采用回流和超声波两种方法对蒙药材接骨木中盐酸小檗碱进行提取,并用分光光度法测定盐酸小檗碱的含量,检测波长426 nm.回归方程为：Y=0.00393＋1.28929X（mg/10 ml）r=0.99992;盐酸小檗碱浓度在0.099-0.796 mg/10 ml范围内与吸光度呈线性关系,平均回收率分别为：回流法96.19%;超声波法102.69%.实验结果表明,超声波提取法较回流提取法提取率高.分光光度法简便快速,适用于接骨木中盐酸小檗碱的含量测定.     

反相流动注射化学发光法测定盐酸小檗碱

基于盐酸小檗碱抑制磷钼钒杂多酸氧化鲁米诺产生化学发光,结合流动注射分析技术,提出了一种测定盐酸小檗碱的新方法.盐酸小檗碱在1.0×10-7～1.0×10-4 g/mL浓度范围内与化学发光分析信号呈线性关系;检出限为4×10-8 g/mL;对5.0×10-6 g/mL的盐酸小檗碱进行11次连续测定,相对标准偏差为1.2%.该方法已成功地应用于盐酸黄连素片剂中盐酸小檗碱的测定.     

蒙药材通经草中盐酸小檗碱的提取与含量的测定

以浓盐酸-甲醇（1∶100）为提取溶剂,采用先浸泡,后水浴加热、超声和先水浴加热、超声后浸泡两种提取方法从通经草中提取生物碱,用分光光度法在波长为426nm处分别测定盐酸小檗碱的含量,回归方程为Y=0.00393+1.28929X （mg/10mL）,r=0.99992.通经草中盐酸小檗碱的含量在0.099～0.796 mg/10mL范围内与吸光度呈线性关系.样品盐酸小檗碱回收率分别为93.08%～108.58%,93.08%～100.84%.该结论可为通经草药材的进一步开发利用提供理论依据.     

炮制方法对川黄柏中盐酸小檗碱与盐酸黄柏碱的影响

为考察川黄柏不同炮制品中盐酸小檗碱与盐酸黄柏碱的含量差异,采用HPLC对盐酸黄柏碱和盐酸小檗碱进行含量测定。结果表明川黄柏不同炮制品中除黄柏炭外,盐酸小檗碱的含量均有不同程度增加,其大小顺序依次为:炒黄品酒炙品醋炙品盐炙品蜜炙品炒炭品,盐酸黄柏碱的含量变化依次为:酒炙品醋炙品≈盐炙品炒黄品蜜炙品炒炭品。说明川黄柏炒黄及不同炙法均有利于盐酸小檗碱的提取,酒炙品及醋炙品对盐酸黄柏碱有利于提取,而盐炙品、炒黄品、蜜炙品有不同程度的影响,炒炭品所含盐酸小檗碱和盐酸黄柏碱均比不同炮制品明显降低。     

河车大造片主要成分质量标准研究

采用薄层色谱法（TLC）对制剂中紫河车、地黄进行定性鉴别和高效液相色谱法（HPLC）法对制剂中盐酸小檗碱进行含量测定,建立了河车大造片的质量的控制方法。所鉴别的药材TLC特征明显,在与对照药材色谱相应的位置上显相同颜色的斑点,阴性无干扰。盐酸小檗碱检测量在5.2-41.6μg·mL-1范围内与峰面积呈良好线性关系（r=0.9997）,平均回收率为99.11%,RSD=0.43%（n=6）。所建方法可用于河车大造片的质量控制。     

β-环糊精敏化荧光法测定黄柏中盐酸小檗碱的含量

采用β-环糊精敏化荧光法测定黄柏提取液中盐酸小檗碱的含量.盐酸小檗碱是黄柏的主要提取物,与β-环糊精可以形成包合物,产生敏化荧光作用.在7.50 mg/mL β-环糊精水溶液中,选择荧光激发波长(λ_ex)345 nm,发射波长(λ_em)540 nm,工作曲线线性范围0.10～1.00μg/mL,检出限1.33 ng/mL,测得黄柏中盐酸小檗碱的含量为1.56%.此方法操作简单、准确,对中药中盐酸小檗碱的含量测定具有一定的参考价值.     

流动注射化学发光法测定盐酸小檗碱

在碱性介质中,盐酸小檗碱对CoSO4-H2O2-NaHCO3体系所产生的弱化学发光,具有明显的增敏作用。据此,拟定了一种测定盐酸小檗碱的流动注射化学发光法。方法的线性范围为2.0×10-7～1.0×10-5mol·L-1,检出限为8.1×10-8mol·L-1。对2.0×10-6mol·L-1的盐酸小檗碱标准溶液进行9次平行测定,相对标准偏差为1.2%。该法可用于胶囊中盐酸小檗碱含量的测定。对该化学发光反应机理进行了讨论。     

渗漉法提取黄连中小檗碱的工艺研究

目的考察渗漉法提取黄连中小檗碱的主要影响因素。方法通过正交实验法确立试验体系．采用紫外分光光度法测定盐酸小檗碱含量。结果选择不同的提取条件盐酸小檗碱提取率有显著差异。结论最优提取工艺是：粉碎度为最粗粉、溶媒量为12倍、渗漉速度为5mL·min^-1。     

HPLC测定黄柏炮制品中盐酸小檗碱质量分数

采用HPLC法测定川黄柏及其炮制品中盐酸小檗碱质量分数；流动相为乙腈-0．02 mol/L磷酸(体积比为40：60)；流速为1．0 mL/min；进样量为10μL；检测波长为346 nm；柱温30℃．黄柏炮制方法分别为盐炙、酒炙、炒炭．结果表明,黄柏经不同的方法炮制后,小檗碱质量分数均下降,生黄柏中小檗碱质量分数最高,为1．156%；盐黄炙次之,质量分数为1．105%；其次是酒黄柏,质量分数为1．065%；黄柏炭中盐酸小檗碱质量分数最低,为0．434%．HPLC法测定黄柏中盐酸小檗碱质量分数具有重现性好,操作简单等特点．     

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.