果葡糖浆加氢制备甘露醇的选择性

研究了不同催化剂和工艺条件对果葡糖浆加氢反应制备甘露醇的选择性的影响，采用自制的Ni(Ⅰ）催化剂，在PH6、90℃、5.0MPa和果葡糖浓度200g/L条件下，果葡糖浆加氢反应制备甘露醇的反应选择性可达到70％，与文献报道的选择最好的铜催化剂相当，在酸性溶液的和较低温度下进行该反应，有利于提高反应的选择性。     

一步酸法水解菊粉生产高果糖浆

用黑曲霉突变株AJ1958产生的菊粉酶，水解菊粉抽提液生产高果糖浆．以6O目菊芋粉在水料比为6：1，料液pH3．0~3．5，60℃条件下浸泡0·5h，过滤，其菊粉抽提率可达95％以上．在每克菊粉投酶量120μmol／min下，水解菊粉抽提液6h～7h，水解率达到95％以上．调nH至4．2～4．5，经活性炭脱色，减压浓缩，得可溶性固形物浓度为0·77g／g以上，果糖含量0．90g／g以上，具有果糖纯正香味的高果糖浆．     

湖北贝母愈伤组织诱导条件的研究

以湖北贝母鳞茎为外植体，对愈伤组织诱导务件进行研究．结果表明：6-BA NAA、6-BA IBA都能产生愈伤，其中以MS 1．0mg／L6-BA 2．0mg／LNAA为培养基诱导愈伤组织的效果最好；外植体用10％的84消毒液消毒20min效果较好；最适培养温度为20℃；光照在诱导过程中具有重要作用．     

蒜头果细胞悬浮培养的研究

采用蒜头果(Malania oleifera Chun et．K Lee)新鲜种子的胚乳在4种含不同激素浓度组合的培养基上诱导产生愈伤组织并建立起细胞悬浮培养体系。结果表明：愈伤组织诱导率为66．7％～86．6％，其中以MS 6-BA0.5mg／L 2，4-D 2．0mg／L 蔗糖3％的培养基最佳，其诱导出的愈伤组织具有较强的增殖能力和较好的脆散结构；最佳继代培养基为MS 6-BA0．2mg／L 2，4-D2．0mg／L 蔗糖3％；将继代后的愈伤组织转入6种含不同激素浓度组合的MS液体培养基中进行振荡培养，在综合分析各培养基的单细胞密度，细胞团块密度。细胞生物量增长率等指标后，初步筛选出MS 6-BA0．2mg／L 2，4-D 2．5mg／L 蔗糖3％培养基为较好的液体培养基。     

地面水中镉的测定方法

用NH4NO3-Pb(NO3)2联合基体改进剂，石墨炉法直接测定地面水中的痕量镉。通过不同务件的实验，确定了最佳的分析务件；并通过对实验和加标回收率的测定，建立了空白实验，在0．19μg/L～5．0μg/L线性范围内，镉的最低检出限为0．19μg/L，实验结果表明，该方法快速方便，提高了分析效率，准确度高，精密度好。     

影响硬糖感官品质的关键因素

主要研究了影响硬糖感官品质的关键因素．分析果葡糖浆、柠檬酸的添加量以及熬制温度、熬制时间对硬糖品质的影响,结果表明：对硬糖感官品质影响程度由大到小依次为：熬制温度、熬制时间、果葡糖浆添加量、柠檬酸的添加量．随着熬制温度的增加,硬度呈增大趋势,脆性先增大后趋于平稳,感官评价分值先增大后减小;随着熬制时间的增加,硬度和脆性都呈增大趋势,感官评价分值呈下降趋势;随着果葡糖浆添加量的增大,硬度及脆性都呈下降趋势,感官评价结果先增大后减小;随着柠檬酸添加量的增大,硬度、脆性和感官评价分值都呈先增大后减小的趋势,并且前两者变化趋势相同．熬制温度为155℃、熬制时间为5min、果葡糖浆和柠檬酸的添加量分别为10％和0．50％时,硬糖的感官品质较好．     

蜂蜜与寡糖

蜂蜜是一种史前时期唯一容易得到的浓缩糖浆。从古流传至今日,中药“蜜丸”就是中药添加蜂蜜制成的。最近,陕西省一位朋友来访问我谈起他们用42％果糖浆代替蜂蜜制成中药蜜丸,其治疗效果远远不及蜂蜜。这件事引起我很大兴趣,因为中药还是那些中药,证实果萄糖浆不及蜂蜜。正好我们实验室进行寡     

固定化酶在药物合成和食品生产中的应用

近年来，固定化酶在半合成头孢菌素，半合成青霉素，单一对映体药物，富果糖浆生产，氨基酸消旋体的光学拆分，油酯改性等食品和制药方面取得了许多进展，并进入工业实用。     

槐果碱对人红白血病K562细胞的增殖抑制和诱导凋亡作用

研究了槐果碱对人红白血病细胞株K562的增殖抑制和诱导细胞凋亡的作用，应用流式细胞仪进一步观察槐果碱对K562细胞周期的影响。结果表明：槐果碱对K562细胞生长有明显的抑制作用，且这种抑制作用呈浓度依赖性、时间依赖性。细胞经0．8g／L、1．0g／L的槐果碱作用48h后，即呈现典型的细胞凋亡形态学变化，作用72h后DNA凝胶电泳出现片段的梯形条带。流式细胞仪分析显示，用1．0g／L槐果碱使K562细胞阻滞于G0／G1期，作用72h后G0／G1细胞比例由38．0％上升到56．2％。槐果碱对人红白血病细胞K562的增殖具有明显的抑制作用，并能诱导其发生凋亡。     

催化电解氧化与SBR法联合处理垃圾渗滤液的实验研究

采用催化电解氧化与SBR联合工艺对垃圾渗滤液的处理进行了实验研究．催化电解氧化的最佳操作奈件为：电流密度5A／dm^2；ρcl-5000ms／L；ρSnCl2 50mg／L；极板间距0．5cm；单位体积的垃圾渗滤液所使用的极板面积500cm^2／L；电极材料采用PbO2-IrO2-TiO2／Tj（三元电极SPR）．SBR法处理催化电解氧化出水较理想的操作条件为：溶解氧2-4mg／L；曝气时间5h；沉淀30min；温度20-30℃；pH值6．5-8．0．出水各项指标的去除率分别为COD达到90％以上，NH3-N达到99％，TN达到95％以上，色度达到99％，重金属离子含量低于0．001mg／L．     

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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