精米厂节碎米发酵性饮料的研究

讨论了以节米碎米为主要原料，生产含汽发酵性饮料的工充程和工艺参数。结果表明：将节米适度粉碎，有利于糖化发酵的进行，采用以α－淀粉酶液化（温度９０℃，时间３０ｍｉｎ，用量１５ｕ／ｇ淀粉），酿酒酵母（０．０１％）与酒曲（０．３％）混合发酵，以及发酵液混充ＣＯ２等工艺，研制出的发酵性饮料口感好，风格突出。     

粗淀粉原料谷氨酸发酵新工艺研究

本研究采用木薯粗淀粉原料，双酶法制糖，在过量生物素下添加青霉素的发酵工艺路线，以接种量８％、初糖浓度１００～１３０ｇ／Ｌ，在发酵的适当时间添加适量青霉素（约４ｕ／ｍｌ），发酵过程流加尿素溶液控制ｐＨ７．１～８．０范围，同时流加浓糖液，经４０小时摇瓶培养，结界谷氨酸生成量高达１０１．９ｇ／Ｌ，糖酸转化率５９．５３％。与传统的采用精淀粉控制生物素＂亚适量＂工艺相比，可大幅降低粮耗、降低成本，提高产酸１５～２０ｇ／Ｌ．     

植物蛋白的酶法水解

应用中性蛋白酶对豆粕进行水解，酶用量为１６６蛋白酶８０００ｕ／ｇ原料，１３９８蛋白酶９０００ｕ＝ｇ原料，料水比为１：１０，保温水解６７－７２ｈ，蛋白质消化率可达７０５以上，氮溶指数可达８５％以上，水解过程中适当添加纤维素酶和α－淀粉酶，对提高蛋白质消化率有利。     

丝状真菌产生β－葡聚糖酶的研究 Ⅰ．GCN平板的建立及产酶菌株的选育

本文报道适用于筛选丝状真菌产生β－葡聚糖酶的平板初筛法。即：β－葡聚糖─刚果红营养平板法（ＧＣＮ平板法）．运用此法从分离源中初筛到产酶菌黑曲霉（Ａｓｐｅｒｇｉｌｌｕｓｎｉｇｅｒ）Ａ２１，经ＵＶ和ＮＴＧ多次诱变，获得产酶能力高于亲株１．４６倍变异株Ａ２１４８．在初始ｐＨ６．８、温度２９℃和以大麦为主碳源培养基中，变株Ａ２１４８经８６ｈ培养产生β－葡聚糖酶［ＥＣ，３．２．１．７３］１２８ｕ／ｍｌ，并伴有少量糖化酶、中性蛋白酶及α－淀粉酶的产生。实验室规模提取实验表明：发酵液过滤除菌后，经硫胺、丙酮沉淀可得２１０６ｕ／ｇ左右的粉状酶制剂，酶提取总收率达６０％。     

亚麻酶法脱胶工艺的研究

以温水浸渍亚麻脱胶工艺为基础，研究了酶在亚麻脱胶中的应用。实验表明适宜加酶时间为沤麻开始后８ｈ，加适宜果胶酶量为５．１×１０＾６￣６．８×１０＾６ｕ／ｔ干茎，果胶酶和半纤维素酶的适宜配比为１：１，适宜温度３８℃，与温水浸渍沤麻工艺相比，酶法沤麻可缩短沤制时间７５％。     

高变性豆粕中蛋白质水解特性的研究

就高变性豆粕的胰蛋白酶水解问题进行了研究，指出胰蛋白酶水解蛋白质的最适温度为４５℃，最适ｐＨ值为８０。水解高变性豆粕的最佳条件为：温度４５℃，ｐＨ值８０，时间为６ｈ，底物浓度为９０％，酶量／底物为８０００Ｉ·ｕ／ｇ。在此条件下，高变性豆粕中蛋白质可有６３１５％水解溶出     

流加葡萄糖对L-天冬酰胺酶发酵的影响及其动力学特性

着重讨论了葡萄糖对Ｌ－天冬酰胺酶发酵过程的影响,并对其发酵动力学特性进行了分析。采用自动流加葡萄糖控制发酵ｐＨ的工艺,可使Ｌ－天冬酰胺酶活力达到６４ｕ／ｍｌ,比添加葡萄糖的摇瓶发酵提高了１４６％。流加葡萄糖控制ｐＨ的Ｌ－天冬酰胺酶发酵是生长相关的;维持２～５ｍｇ／ｍｌ和１．２～１．４ｍｇ／ｍｌ的葡萄糖浓度,可分别使比生长速率和比产酶速率达到０．８１／ｈ和１２００ｕ／ｇ．ｈ。     

火焰原子吸收光谱法测定桑叶中Cu,Pb,Cd的含量

本文用火焰原子吸收光谱法测定了桑叶中Ｃｕ、Ｐｂ、ｃｄ的含量，并研究了样品的不同消化方法对其测定的影响，选择了ＨＮＯ＿３＋ＨＣｌＯ＿４＋ＨＦ消化苯系用于实际测定。方法的灵敏度依次为０．３１４μｇ／ｍｌ／１％，０．０３２μｇ／ｍｌ／１％，０．０５４μｇ／ｍｌ／１％。相对标准偏差依次为４．９％，３．４％，２．１％。加标回收率依次为９７－１０２％，９８－１０２％，９７－１０１％。     

镍电解阳极液净化除铜

用镍精矿－活性阳极泥－亚硫酸方法，研究了镍电解阳极液除铜效果；通过正交实验，查明了影响残铜量和ｍｃｕ／ｍＮｉ２个指标的主要因素和次要因素；得出最佳工艺条件是：镍精矿的质量浓度为０．３０ｇ／Ｌ亚硫酸体积分数为１５．０ｍＬ／Ｌ阳极泥质量浓度为３．３０ｇ／Ｌ阳极泥活度为３０％，反应温度为８５℃，起始ｐＨ值为３．５，反应时间为４０ｍｉｎ。     

克鲁维酵母Y－85菊粉酶的研究

菊粉酶产生菌株─—克鲁维酵母Ｙ－８５在１５Ｌ罐中进行产酶发酵，培养２４ｈ，发酵液中菊粉酶的总活力可达１０３２ｕ／ｍｌ，其中胞壁酶活７６８ｕ／ｍｌ，占总酶活的７４％。用含半胱氨酸的缓冲液提取胞壁酶，酶的回收率达８８％，比活力可达１００８ｕ／ｍｇ．酶作用于菊糖的最适ｐＨ为４．５，最适温度为５０℃，在５０℃以下和ｐＨ４～８稳定，金属离子Ａｇ￣＋、Ｈｇ￣（２＋）对酶有强烈的抑制作用，ＰＣＭＢ对酶也有明显的抑制作用。该酶可水解菊糖，棉子糖和蔗糖等多种底物，能快速将菊芋抽提液中的菊糖水解成果糖，适合用于以菊芋为原料的高果糖浆生产。     

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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