化学药剂预处理对金盏菊蕾期切花保鲜效果的影响

探讨了８ＨＱ，ＡｇＮＯ３等化学药剂处理对金盏菊切花瓶插期间水份平衡，可溶性糖含量和过氧化物酶活性的影响，各种药剂处理均可提高观赏品质，其中８－ＨＱ＋ＡｇＮＯ３＋蔗糖的组合效果最佳，花径增大２．２ｃｍ，花重增大４９．７２％，瓶插寿命延长４ｄ，可溶性糖含量和守氧化物酶活性是导致切衰老的两个重要因素。     

UASB反应器处理低浓度有机废水的机理研究

研究了６．５ＬＵＡＳＢ反应器在常温下处理低浓度有机废水的启动、运行和基质降解动力学．研究表明：当污水水温大于１５℃时，运行２０ｄ后出现颗粒污泥，４６ｄ基本上完成反应器的启动．在水温为１５～２９℃下运行，水力停留时间在３～８．７ｈ，ＣＯＤ去除率可达７１．９％～８８．５％．对反应器建立基质降解动力学模型，在平均温度为１７．２℃，２２．３℃和２６．４℃下减速增长速度常数Ｋ２分别为１．８９×１０－３，２．４０×１０－３和２．７７×１０－３Ｌ／ｍｇＶＳＳ·ｄ．     

贮存时间对武昌罗索线虫寄生前期幼虫感染率的影响

将武昌罗索线虫寄生前期幼虫贮存于０－５℃条件下，其有效率分别是：３ｄ为９０．５％；６ｄ为８６．８％；９ｄ为８１％；１２ｄ为７８％；１５ｄ为６７．５％；２１ｄ为３１．３％；２７ｄ为２６％，蚊幼虫的寄生率分别是：３ｄ为９３％；６ｄ为９２％；９ｄ为９３％；１２ｄ为９０％；１５ｄ为８２％；２１ｄ为６３．５％；２７ｄ５７％，经方差分析，其有效率在１２Ｄ之间无显著性差异。Q     

16%中农一号水剂对菜青虫的防治效果

对菜青虫采用不同药剂的防效比较试验，结果：１６％中农一号水剂对２￣３龄菜青虫的防治效果最高为９８．４％，最低为９２．０２％，适宜稀释倍数为２００￣２５０倍。有效期可达７￣１０ｄ。     

乳酸生产菌的选育及发酵的研究

以分离到的一株德氏乳杆菌（Ｌａｃｔｏｂａｃｉｌｌｕｓ ｄｅｌｂｒｕｃｋｉｉ） １－１为出发菌株，经紫外线、硫酸二乙酯、亚硝酸钠等诱变剂处理，筛选出一株产乳酸较高的突变株ＺＬ－５１３，乳酸钙产量由５．８％提高至９．４％。以正交试验为基础对发酵培养基进行优化，采用优化后的培养基发酵 ３ ｄ，残糖降至 ０．１％以下，乳酸钙产量达 １５％。比优化前产酸提高 ６０％，缩短发酵周期 １ｄ。以质量分数 ８％～１５％的玉米粉为原料进行发酵，乳酸钙产量分别为１０％～１８．５％。     

海南岛美洲斑潜蝇生物学特性及其防治研究

通过室内饲养观察和田间系统调查,研究了海南岛美洲斑潜蝇的生物学特性,并采用干扰作用控制指数（ＩＰＣ）评价了几种杀虫剂对美洲斑潜蝇种群的控制作用．结果表明：１）该虫在海南年发生１９～２０代,卵历期２～４ｄ,幼虫历期３～７ｄ,蛹历期７ｄ,成虫寿命在１５ｄ左右;２）１．８％集琦虫螨克和１％农哈哈对美洲斑潜蝇种群控制效果较好,其干扰作用控制指数分别为０．１１６和０．１１１;而９８％的巴丹对美洲斑潜蝇种群控制效果较差,ＩＰＣ值为０．２４６;４０％的氧化乐果的控制效果最差,ＩＰＣ值为０．３０１     

“926”植物生长调节剂在花生上的药效试验

试验了“９２６”植物生长调节剂在花生上的增产效果，结果表明：喷施８０ｐｐｍ的药剂，平均亩产１１２－２４２．８ｋｇ，增产率为１８．３０－２３．５７％，增产幅度非常显著。     

增效剂在某磷矿浮选中的应用研究

在磷矿石反浮选中，增效剂ＫＳ和ＴＳ均对捕收剂油酸具有协同效应，仅采用一粗一精的流程，就可使磷精矿Ｐ２Ｏ５品位分别达到３４．８９％和３４．８０％，与单独使用油酸相比，精矿Ｐ２Ｏ５中的品位提高了４％以上，药剂成本仅增加０．８０￣９．００元／ｔ，初步讨论了增效剂作用机理。     

地乐胺防除密植型蔬菜田杂草的试验

应用４８％地乐胺药剂防除密植型蔬菜韭菜、胡萝卜田间杂草，简便易行。试验结果表明：使药期在幼苗未出土或刚出土（播后大约１０～１５ｄ），灌水后于地表喷施，防除效果达９５％。最佳使用量为３０００～３７５０ｍｌ／ｈｍ２，每公顷药液１２００～１５００ｋｇ，用药量超过４５００ｍｇ／ｈｍ２，有药害产生。     

溶出伏安法测食品中苯酚含量

本文研究并比较了在硼砂介质中，苯酚及其衍生物的电化学行为，利用本酚在—０．５Ｖ（对ＳＣＥ）吸附富集，再进行氧化溶出，建立了测定苯酚的新方法。该法简单、灵敏，苯酚的检测限为８×１０－８ｍｏｌ．Ｌ－１，浓度在５×１０－７～８×１０－６ｍｏｌ．Ｌ－１范围内与溶出峰电流ｉｐ呈良好的线性关系。对用酚醛树脂涂料马口铁制成的蕃茄酱罐头中苯酚的测定，回收率在８４．６％～８９．５％之间。     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has