黄秦艽的化学成分分析

目的:建立黄秦艽药材提取物中总黄酮和总环烯醚萜的含量测定方法.方法:采用紫外分光光度法,测定了总黄酮、总环烯醚萜的含量.结果:建立了总黄酮、总环烯醚萜的标准曲线,测得黄秦艽药材中总黄酮的平均含量为31.25%,RSD=0.13%;总环烯醚萜平均含量为20.91%,RSD=0.38%.结论:所建立的测定方法实用性强,重现性好,可作为该药材的质量控制方法.     

超声提取-分光光度法测定断血流总皂苷含量

目的对比研究回流法和超声法提取并测定断血流中的总皂苷。方法采用分光光度法直接测定不同产地断血流皂苷的含量。结果断血流皂苷在48.8~488μg范围内有良好线性关系(r=0.999 4),总皂苷平均回收率为102.40%,RSD为1.01%(n=3)。结论超声提取法具有简便、快速的特点,分光光度法测定结果准确可靠,重复性好,可用于对药材进行质量控制。     

紫外可见分光光度法测定蒙药复方肉豆蔻-5味中酯类成分的含量

采用紫外可见分光光度法在490nm波长处测定肉豆蔻-5味中酯类成分含量,得出异土木香内酯在1.704~6.816mg范围内线性关系良好.回归方程Y=0.0909 X+0.0784(r=0.9999),加样回收率为97.66%,RSD为1.50%.结果显示此方法简便、灵敏、准确,可用于肉豆蔻-5味中总酯类成分的含量测定.     

柴黄颗粒中总皂苷含量的测定

目的:建立柴黄颗粒中柴胡总皂苷的含量测定方法。方法:采用紫外可见分光光度法,在波长545 nm处对样品中的总皂苷进行含量测定。结果:柴胡总皂苷在0.038～0.266(mg.mL-1)范围内有良好的线性关系(r=0.999 7),该法的平均加样回收率为97.6%,RSD为1.8%(n=6)。结论:所建立的方法准确、简便、快速,重现性好,适合用于测定柴黄颗粒中总皂苷的含量,可为柴黄颗粒的质量控制提供依据。     

桑姜感冒胶囊中总黄酮含量的测定

目的:建立桑姜感冒胶囊中总黄酮含量的测定方法。方法:采用紫外-可见分光光度法,以芦丁为对照品,以506 nm作为测量波长进行测定。结果:芦丁在0.5~3.0 mg范围内与吸光度呈良好的线性关系(r=0.999 7),平均回收率为96.63%,RSD为1.91%。结论:该方法操作简便、准确、重现性好,可用于测定桑姜感冒胶囊中总黄酮的含量。     

白芷愈伤组织中总香豆素的提取与测定

建立了白芷愈伤组织中总香豆素质量分数的测定方法,同时优选利用超声提取白芷愈伤组织中总香豆素的最佳工艺.采用L9(34)正交实验对乙醇体积分数、超声时间、超声温度以及溶液pH等因素进行研究,确定超声提取的最适条件.以欧前胡素为指标性成分,检测波长为300 nm,利用紫外-可见分光光度法检测白芷愈伤组织中总香豆素的质量分数.结果表明,利用超声提取白芷愈伤组织中总香豆素的最适奈件为:乙醇体积分数为60％,pH为9,超声温度70℃,超声时间30 min.欧前胡素的质量浓度在3.0～30.0μg/mL (R=0.999)内与吸光度呈良好的线性关系,平均加样回收率为98.03％,RSD=2.4％(n=3).该方法操作简单,结果准确,可用于白芷愈伤组织中总香豆素的质量分数测定.利用该方法对白芷愈伤组织和白芷药材进行同时提取测定,结果表明白芷愈伤组织中总香豆素的质量分数是白芷药材中的9.7倍.     

槲皮苷作对照品紫外分光光度法测定香柏中总黄酮的含量

目的建立香柏Sabina pingii (Cheng ex Ferre) var. wilsonii (Rehd.) Cheng et L.K.Fu总黄酮含量测定的方法. 方法利用紫外分光光度法, 用槲皮苷作对照品, 测定香柏中总黄酮的含量. 结果该方法重复性试验中RSD=0.92%, 精密度试验中RSD=1.00%, 回收率平均值为105.4%, 三批香柏枝叶中总黄酮的含量平均为4.14%. 结论该含量测定方法简便, 准确, 可用于香柏总黄酮的含量测定.     

紫外分光光度法测定美洛昔康片的含量

为测定美洛昔康片的含量,从而对本品质量进行控制,采用紫外分光光度法进行测定.测定结果为:空白辅料对测定无干扰,溶液稳定性良好,线性相关系数r=0.9999,平均回收率=100.1%,RSD=1.44%.该法简便易行、快速、准确,可用于本品的质量控制方法之一.     

阿尔泰狗哇花总黄酮和总皂苷定量分析方法研究

采用分光光度法,以槲皮素为对照品经AlCl3-NaAc显色测定总黄酮含量,以齐墩果酸为对照品经香草醛-高氯酸显色测定总皂苷含量.分析结果表明,原药材中总黄酮和总皂苷的含量分别为17.79和40.86 mg/g,线性范围分别为30.6～112.2μg(r=0.999 7)和20～60μg(r=0.999 7),平均回收率分别为97.7%(RSD=2.4%,n=5)和98.7%(RSD=0.98%,n=5).该法简便、准确、灵敏度高、重现性好,也可用于阿尔泰狗哇花总黄酮和总皂苷产品的含量测定.     

黔产马兰草总皂苷含量测定研究

通过以冰醋酸(含5%香草醛)、高氯酸为显色剂,齐墩果酸作为对照品,采用紫外分光光度法,以550 nm为测定吸收波长,计算黔产马兰草中总皂苷的含量,从而建立黔产马兰草中总皂苷的含量测定方法。结果表明:齐墩果酸在0.029～0.079 mg/mL(r=0.999 8)范围内线性良好,平均回收率为96.46%(n=6),RSD=1.04%。通过对10批次黔产马兰草中总皂苷的含量测定,其结果在1.86%～3.12%之间,说明黔产马兰草药材质量较均一稳定。本文所建立的黔产马兰草中总皂苷含量测定方法,操作简便、结果准确、重现性及稳定性好,回收率可靠,可用于黔产马兰草药材的质量控制方法。     

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.     

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.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with