蓝、紫粒小麦籽粒蛋白营养及抗氧化性研究

以白粒小麦川麦107为对照,将蓝、紫粒小麦籽粒蛋白营养与黄酮粗提物对猪油的抗氧化性进行研究.结果表明:参试蓝、紫粒小麦籽粒的蛋白含量、蛋白质氨基酸总量,非必需氨基酸和必需氨基酸含量都高于白粒对照小麦川麦107;蓝、紫粒小麦籽粒有较高的蛋白质氨基酸评分和化学评分.蓝、紫粒小麦籽粒黄酮粗提物对猪油的抗氧化性结果表明:蓝、紫粒小麦籽粒黄酮粗提物的抗猪油氧化能力都较60%乙醇强.参试材料中,除031-1的酸败时间较川麦107稍早之外,其余4个蓝、紫粒小麦品种发生酸败的时间均比川麦107要晚.     

水稻黄酮对免疫性肝纤维化的保护作用

目的:观察水稻黄酮对免疫性肝纤维化大鼠模型的保护作用,并从自由基的产生及清除方面探讨其机理.方法:腹腔注射异源血清诱导的大鼠肝纤维化模型,以γ-干扰素作对照,测定相应肝功和肝纤维化指标,及肝组织中GSH-PX、MDA、SOD活力.结果:γ-干扰素和水稻黄酮可显著改善肝功与肝纤维化,降低MDA含量,提高SOD、GSH-PX活力.结论:γ-干扰素和水稻黄酮,对肝纤维化有明显的抑制作用;而水稻黄酮还可显著改善肝功能,提高肝组织中自由基清除系统的功能,加强肝组织清除自由基及MDA,减轻自由基对肝组织的损害.     

子午岭保护区刺五加紫丁香苷、多糖及黄酮含量分析

选取子午岭保护区药用植物刺五加,分析其不同部位紫丁香苷、多糖和黄酮的含量。结果发现子午岭保护区刺五加不同部位紫丁香苷、多糖和黄酮含量均存在显著差异。紫丁香苷含量为0.000 1%～0.001 8%,其中茎干中含量最高,为0.001 8%;多糖含量为3.43%～7.53%,其中茎干中含量最高,为7.53%;黄酮含量为0.45%～5.12%,其中嫩叶中含量最高,为5.12%。与其他地区相比,子午岭保护区刺五加多糖含量处于较高水平,黄酮含量处于中等水平,紫丁香苷含量处于较低水平。该地区刺五加茎、枝和叶均具有药用价值,能够进行引种培育,有较高的利用价值。     

超声波辅助提取花生壳中黄酮的工艺研究

采用超声波辅助法对花生壳中黄酮进行提取,研究了料液比、提取功率、提取温度及提取时间对花生壳中黄酮提取率的影响.通过单因素实验和正交试验确定了花生壳黄酮的优化提取工艺:料液比为1∶30,提取功率为100 W,35℃下浸提40 min,在此工艺下提取的花生壳中黄酮的质量分数为3.458%.     

两种黄酮抗氧化活性及降低香烟粒相自由基的应用研究

采用电子自旋共振法、光敏化合物微生物方法,研究了葛根黄酮、竹叶黄酮的抗氧化活性,并将其应用于降低香烟烟气粒相自由基的实验.结果显示,葛根黄酮、竹叶黄酮对氮氧自由基的清除率分别为35.5%和27.5%,对单线态氧的清除率分别为7.7%~58.1%和22.6%~67.7%,平均可以降低香烟烟气中23.8%和11.6%的粒相自由基.葛根黄酮和竹叶黄酮具有较好的抗氧化活性,并对香烟烟气粒相自由基有一定的清除作用.     

不同季节与产地香椿黄酮及皂苷的含量变化

以黄酮与皂苷含量为考察指标，研究了不同季节、不同产地和同一产地不同部位香椿黄酮与皂苷的含量变化。结果表明，香椿黄酮与皂苷含量以11月份采集的样品含量最高，分别可达到叶片干重的4．57％和2．25％，不同产地香椿黄酮与皂苷含量有明显差异，北方和中原地区黄酮与皂甘含量均大于南方的江苏、上海地区采集的样品。同一产地香椿植株不同部位的黄酮与皂苷含量也有显著差别，其中根、皮中黄酮含量较高，树根中黄酮含量为2．27％，树皮中黄酮含量为3．27％，叶柄黄酮含量低，只有0．92％。皂苷含量以根部较高，达到1．47％，而叶柄皂苷含量只有0．40％。     

玫瑰花渣中色素的研究

本文以研究玫瑰花提取挥发油后废渣的应用为目的,介绍了废渣中有色物质二氢黄酮的鉴定方法,萃取与纯化色素的主要过程,重点研究了水、乙醇、酸度、光和温度对色素稳定性影响.说明了从玫瑰花渣中提取的色素是以二氢黄酮为主体的混合色素,是一种稳定的天然色素,有广泛的应用价值。     

黄酮化合物抗癌活性的研究进展

黄酮化合物是许多天然药物的活性成分,由于黄酮化合物具有显著的抗癌作用而受到越来越多的重视。该文综述近了十年来国内外学者报道的47个黄酮化合物在抗癌活性中的应用研究。     

松花粉黄酮提取物体外抗氧化作用的研究

研究松花粉的体外抗氧化作用.采用还原K3Fe(CN)6法对松花粉中黄酮的还原力进行了测定,用水杨酸法研究了松花粉中黄酮的清除·OH的效果,采用邻苯三酚自氧化法研究松花粉黄酮提取物对超氧阴离子自由基的清除能力,以及研究了松花粉黄酮提取物对Fe2+诱发卵黄低密度脂蛋白多不饱和脂肪酸(PUFA)过氧化反应的抑制作用.结论是松花粉中黄酮的含量为2.95‰;松花粉黄酮在体外有较好的还原力和清除羟自由基的能力;对碱性邻苯三酚自氧化产生的超氧阴离子、Fenton反应产生的羟基自由基和Fe2+诱发卵黄低密度脂蛋白多不饱和脂肪酸(PUFA)过氧化产生的烷氧基(LO·)和烷过氧基(LOO·)均有明显的抑制作用,且均呈现一定的量效关系.上述结论说明了松花粉黄酮提取物具有良好的体外氧化的作用.     

荞麦黄酮的提取及其对食用油脂抗氧化作用的研究

将甜荞、苦荞粉碎后乙醇浸提法提取黄酮类化合物,其黄酮粗提物的得率分别为1.39%和2.76%,粗提物中黄酮含量分别为0.589%和3.22%.以BHT和Vc为阳性对照,研究两种荞麦黄酮粗提物对植物油和动物油的抗氧化效果.结果表明,两种荞麦黄酮粗提物具有显著的抗氧化性能,其中苦荞黄酮粗提物在两种油脂中的抗氧化性高于BHT和Vc.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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