酒成分分析柱测定复方地塞米松乳膏中樟脑、薄荷脑含量的研究

建立同时测定复方地塞米松乳膏中樟脑,薄荷脑含量的高效毛细管气相色谱法.以萘作内标物.采用AT.PEG-20M5、0 m×0.25 mm×0.5 u、涂布度10%的石英毛细管柱（酒精成分分析柱）,以氢火焰离子检测器（FID）检测;柱温180℃,进样口和检测器温度分别为230℃、240℃.该色谱条件下,樟脑、薄荷脑在0.080.2 mg·mL^-1浓度范围内分别呈良好的线性;樟脑、薄荷脑精密度实验的RSD分别为1.91%（n=6）、1.61%（n=6）;平均加样回收率实验中,樟脑回收率为99.66%、薄荷脑回收率为102.14%;最低检测限樟脑为0.216μg,薄荷脑为0.252μg.本方法快速可靠,简便易行,可用于复方地塞米松乳膏生产中的质量控制.     

HPLC测定妇炎净软胶囊中阿魏酸的含量

建立以高效液相色谱法测定妇炎净软胶囊中阿魏酸含量的方法。色谱柱为Diamomil C18（5μm,250×4．6mm,5μm）;流动相为甲醇-1％醋酸（35：65）;流速1ml·min^-1;检测波长：320nm。阿魏酸的线性范围是0．05055-0．4044μg（r=0．9999）,平均回收率为100．4％,RSD=1．45％（n=5）。本方法简便、快捷、结果准确,可用于妇炎净软胶囊的质量控制。     

近红外光谱检测技术快速测定桔梗总皂苷的研究

利用近红外快检技术建立测定桔梗总皂苷含量的模型,探索近红外光谱仪在中药材有效成分研究方面的可行性.利用紫外-可见分光光度计建立测定不同批次的中江桔梗总皂苷含量的方法,以其含量作为参比,运用近红外技术收集50批中江桔梗样品的光谱图,借助偏最小二乘回归算法建立中江桔梗总皂苷的定量校正模型,并对未知样品中总皂苷含量进行预测.结果显示,桔梗中总皂苷定标标准偏差、相对分析误差、交叉检验标准误差、校正模型的决定系数和交叉验证相对分析误差分别是0.953、8.154、1.999、0.97、3.887.表明本研究建立的定性模型检测速度快、效率高、结果可靠,可用于桔梗总皂苷的质量控制.     

超声波辅助提取桔梗皂苷方法的研究

采用桔梗为原料,以桔梗皂苷的提取率为指标,对超声波辅助提取桔梗皂苷的方法进行研究.以乙醇为主要提取溶剂,应用正交设计优选桔梗皂苷的提取方法,选择乙醇体积分数、料液比、超声温度和超声时间为影响因素,确定了超声波辅助提取桔梗皂苷的最佳条件为:乙醇体积分数90%、料液比1∶11(g/mL)、超声温度45℃、超声时间30 min.桔梗皂苷的提取率为4.255%,通过泡沫实验和颜色反应实验确定提取物质为桔梗皂苷.     

HPLC测定大理苍山两种鹿蹄草中金丝桃苷的含量

目的：通过测定大理苍山两种不同鹿蹄草中金丝桃苷的含量,为控制鹿蹄草的质量和临床应用提供理论依据。方法：HPLC测定金丝桃苷含量的色谱条件：ZORBAX SB-C18色谱柱（4.6mm×150mm,5μm）,流动相：甲醇∶水（35∶65）,检测波长：358nm,进样量：8.00μl,流速：1.0ml/min,柱温：25℃。结果：金丝桃苷的线性范围为0.18～0.90μg（r=0.9991）,回收率为100.60%（RSD=1.78%）。结论：两种鹿蹄草中金丝桃苷的含量存在差异。     

HPLC测定湖南省地产百合中薯蓣皂苷元含量

目的测定百合药材中薯蓣皂苷元的含量。方法Phenomenex C18色谱柱（4.6×250mm,5μm）;流速：0.7ml/min;柱温：30℃;检测波长：203nm;流动相：乙腈-水梯度洗脱。结果薯蓣皂苷元线性范围为0.04μg～1.60μg,r=0.9988,回收率为98.16%,RSD为2.07%。结论本方法灵敏、准确,可用于百合药材的质量控制。     

高效液相色谱法-蒸发光散射检测器测定盾叶薯蓣中薯蓣皂苷的含量

建立以蒸发光散射检测器(ELSD)测定盾叶薯蓣中薯蓣皂苷含量的高效液相色谱分析方法,考察了不同产地盾叶薯蓣中薯蓣皂苷的含量.色谱柱为HiQsil C18柱(250 mm×4.6 mm,10μm),流动相为乙腈-水(33∶67),流速为0.8 mL/min,柱温为室温.Alltech蒸发光散射检测器参数:载气为氮气,流速为2.5mL/min,漂移管温度为100℃,压力为0.45 Mpa.结果表明:薯蓣皂苷在0.35~3.48μg范围内有良好线性关系,r=0.9976,平均回收率为103.2%,RSD为1.61%(n=6).该方法快速简便,灵敏度高,结果准确可靠,可用于盾叶薯蓣药材中薯蓣皂苷的分析及质量检测与控制.     

毛细管气相色谱法测定土壤和桔梗中七氯及滴滴涕的含量

建立了土壤和桔梗中七氯及滴滴涕异构体含量的气相色谱分析方法.样品以石油醚+丙酮在索氏提取器中提取,提取液以浓硫酸净化.采用DB-5弹性石英毛细管柱分离样品,GC-ECD检测农药七氯、滴滴涕的含量.方法的线性范围为2.18×10-13～5.31×10-11g;敏感度为3.4×10-12～6.8×10-12g/mL;加样平均回收率为96.27%～100.3%(RSD为3.0%～6.5%).     

RP-HPLC法测定柴胡中四种黄酮类成分的含量

建立反相高效液相色谱法测定柴胡中芦丁、曲克芦丁、黄芩苷、槲皮素四种黄酮类成分的含量.采用Shim-pack VP-ODS柱（150mm×4.6mm,5μm）分离样品,以0.5%的磷酸溶液-甲醇（63：37）为流动相,流速为0.8mL·min-1,检测波长333nm,柱温40℃,进样量20μL.结果显示柴胡中四种黄酮类药物达到了完全分离,线性范围1～10μg,平均回收率在91.2%～96.3%之间,RSD分别为为1.6%,2.1%,3.0%和1.1%（n=3）.     

HPLC法测定不同产地山茱萸中熊果酸的含量

为测定不同产地山茱萸中熊果酸的含量,以控制山茱萸的质量,采用SunfireC1(8250mm×4.6mm,0.5μm)色谱柱,以甲醇-水(体积比90∶10)为流动相,流速为1mL/min,在波长210nm处进行检测.实验结果表明,熊果酸在进样量为0.107～1.284μg范围内,峰面积和质量浓度呈良好的线性关系(R=0.9997);平均回收率为100.18%;RSD=1.68%(n=6).该法准确,灵敏度高,重复性好,适用于对山茱萸的质量进行控制.     

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.     

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.     

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.     

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.     

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.     

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-