HPLC/MS/MS法同时测定小鼠血浆中人参皂苷Rg1、Re、Rb1

利用高效液相色谱-串联质谱联用的技术,建立同时测定小鼠血浆中的人参皂苷Rg1、Re、Rb1浓度的分析方法.以RESTEK PinnacleⅡC18柱(50 mm×2.1 mm,5 μm)为色谱柱,流动相:乙腈-水(梯度洗脱);流速200 μL·min-1;柱温:20 ℃;质谱条件为气动辅助电喷雾离子源(ESI),检测方式为正离子多离子反应监测(MRM),用于定量分析的离子为m/z Rg1 832.8→643.6;Re 969.8→789.7;Rb11132.1→365.3;生物样品采用固相萃取方法处理.人参皂苷Rg1、Re、Rb1标准曲线的线性范围为0.5～1 000 ng·mL-1,最低定量下限达到0.5 ng·mL-1,日内、日间变异系数(RSD)均<15%,精密度和准确度等均符合生物样品分析的要求.结果表明该法准确、灵敏、特异,适用于血浆中人参皂苷Rg1、Re、Rb1浓度的同时测定.     

LC-MS/MS法测定人血浆中克拉霉素的质量浓度

建立高效液相色谱-质谱联用法（LC-MS/MS）测定人血浆中克拉霉素的浓度.选用Shim-park VP-ODS色谱柱,以乙腈、φ=0.1%氨水、φ=0.4%甲酸乙腈溶液为流动相,采用梯度洗脱进行分离,样本经乙腈沉淀后进样,选用3200QTRAP型质谱仪的多重反应监测（MRM）扫描方式进行检测.克拉霉素质量浓度线性范围为5～1 000ng.mL-1,定量下限为5ng.mL-1,检测限为0.05ng.mL-1.准确度与精密度结果显示方法日间、日内变异均小于15%,相对偏差为-3.43%～2.97%,低、中、高3个质量浓度提取回收率为91.73%～107.73%,稳定性好.本研究所建立的方法快速、灵敏、专属性强、重现性好,可用于人体血浆中克拉霉素质量浓度的测定和药代动力学研究.     

分子探针N6-羟基乙基腺苷同步荧光测定人血清中蛋白质

在模拟人体生理条件下,基于N6-羟基乙基腺苷(HEA)与人血清白蛋白(HSA)相互作用生成的复合物,导致血清白蛋白的内源荧光产生特异性变化,研究HEA-HSA体系的同步荧光光谱特征;同步荧光光谱特征及强度与Δλ值、反应温度等因素有关.在此基础上,建立了以HEA为探针测定蛋白质的新方法.在最佳实验条件下,HEA-HSA体系的同步荧光强度分别在0~331.2μg.mL-1和331.2~579.6μg.mL-1的浓度范围内与蛋白质浓度呈良好的线性关系,方法的检测限为4.43 ng.mL-1.实验结果表明:该法具有简单、快速、灵敏度高等优点,可直接用于人血清样品中蛋白质总量的测定,结果令人满意.     

流动发光法测定舒普深注射剂中舒巴坦的含量

目的测定药物制剂和血浆中的β-内酰胺酶抑制剂舒巴坦的含量。方法使用一种灵敏、简单、廉价的流动注射化学发光法,这种方法的原理是,在碱性环境中,舒巴坦对鲁米诺和过氧醋酸发光反应有抑制作用。结果在适当的条件下,检测限为2.0ng·mL-1(3σ),舒巴坦的浓度为5.0ng·mL-1至1 000ng·mL-1的范围内,发光的强度与舒巴坦的浓度成线性关系。回归方程为:ΔI=90.195 C+19.54(ΔI表示发光强度,C表示舒巴坦浓度,μg·mL-1),相关系数r2=0.9975。结论这种方法已经成功地应用于2种药物制剂和血浆中舒巴坦的测定。     

LC_MS_MS法测定木通皂苷D大鼠灌胃给药的生物利用度

建立高效液相色谱-质谱联用法(LC-MS/MS)测定大鼠灌胃给药的生物利用度.大鼠随机分为2组,分别尾静脉和灌胃给予100mg·kg-1木通皂苷D,于不同时间点眼眶取血,用LC-MS/MS法检测血浆中药物质量浓度,计算大鼠灌胃给药的生物利用度.结果表明:木通皂苷D线性范围为10~1 000ng·mL-1,最低定量限为10ng·mL-1.准确度与精密度试验结果显示方法日间、日内变异均小于15%,相对偏差为-2.8%~4.6%,低、中、高3个质量浓度提取回收率为95.3%~108.1%.静脉组和口服组的药时曲线下面积AUC0-INF分别为(231 725.98±46 527.21)和(383.63±54.62)ng·h·mL-1,灌胃给药的绝对生物利用度为0.13%.表明木通皂苷D大鼠灌胃给药生物利用度很低.     

浊点萃取-热喷雾火焰炉原子吸收光谱法测定水样中痕量的铜（Ⅱ）

研究了以二乙基二硫代氨基甲酸钠（DDTC）为络合剂、Triton X-100为表面活性剂的浊点萃取-热喷雾火焰炉原子吸收光谱法测定水样中铜的实验方法.考查了DDTC的浓度、溶液pH值、表面活性剂浓度、加热时间、水浴温度、NaCl浓度、干扰离子等实验条件对浊点萃取效率的影响.在最优的实验条件下,该方法的检出限为0.8 ng mL-1,相对标准偏差为4.7%,富集倍数为20.对自来水、河水和标准水样中的铜进行了测定,结果令人满意.     

氧化钛纳米晶溶胶作为共振光散射探针检测L-酪氨酸

以自制粒径约6 nm的氧化钛纳米晶与L-酪氨酸结合后对共振光散射有增敏作用为基础,建立了以TiO2纳米晶溶胶为探针的共振光散射法检测溶液中L-酪氨酸的方法. 考察了pH、超声时间、静置时间、纳米晶浓度和干扰组分对测定的影响. 酪氨酸浓度在0.5～4.0×10-6 g·mL-1 范围呈现较好的线性, 工作曲线的回归方程为ΔIRLS=640.9c+163.4,r=0.993,检出限为1.0×10-7 g·mL-1. 测定了复方氨基酸注射液(18AA)中酪氨酸的含量, 回收率为(99.5～102.0)%,相对     

次甲基蓝与DNA作用的共振光散射光谱研究及机理分析

基于脱氧核糖核酸(DNA)在pH 3.51~4.49的介质中对有机染料次甲基蓝(MB)的共振光散射的增强效应,提出了一种测定DNA的共振光散射法,并对介质酸度、离子强度、DNA热变性、共存物质干扰等实验条件进行了优化.在最佳条件下绘制了工作曲线,该方法线性范围为0~1 440 ng.mL-1,检出限可达14.1ng.mL-1,用于合成样品中DNA的测定,结果令人满意.通过研究红外光谱、紫外-可见吸收光谱及离子强度的影响,初步探讨了MB与DNA相互作用的机理,MB可能是通过静电作用等以DNA为模板在DNA分子表面进行聚集和长距组装,这种聚集导致MB共振光散射信号的增强,这也是该方法的理论基础.     

流动注射纳米微反应器化学发光法测定盐酸多塞平

在酸性条件下,盐酸多塞平分子中氮原子被质子化后与阴离子AuCl4-形成离子缔合物,该缔合物被二氯甲烷带入鲁米诺的氯化十六烷基三甲基铵反胶束纳米微反应器中,离解出来的AuCl4-立即与鲁米诺产生化学发光.在一定浓度范围内,发光强度与盐酸多塞平的含量成线性关系,从而可测定盐酸多塞平的含量.在优化的试验条件下,线性范围为0.001~10μg.mL-1,检出限(3σ)为0.02 ng.mL-1,对浓度为1.0μg.mL-1的盐酸多塞平进行11次平行测定,RSD为1.2%.该法已成功用于片剂、针剂和生物体液中盐酸多塞平的测定.     

反胶束溶液化学发光法测定甲磺酸培氟沙星

在酸性条件下,甲磺酸培氟沙星分子中氮原子被质子化后与阴离子AuCl-4形成离子缔合物,该缔合物被二氯甲烷带入鲁米诺的氯化十六烷基三甲基铵(CTAC)反胶束溶液中,离解出来的AuCl-4立即与鲁米诺产生化学发光.在一定浓度范围内,发光强度与甲磺酸培氟沙星的含量成线性关系,从而间接测定甲磺酸培氟沙星的含量.在优化的试验条件下,线性范围为 0.001～10×10-6 g·mL- 1,检出限(3σ)为 0.02×10-9 g·mL-1,对浓度为1.0×10-6 g·mL-1 的甲磺酸培氟沙星进行11次平行测定,RSD为2.4%.该法已成功用于片剂、注射液和生物体液中甲磺酸培氟沙星的测定.     

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