瓯柑和温州蜜柑、椪柑贮藏期间呼吸强度及理化性质的比较

三个品种的柑桔果实贮藏期间，呼吸强度均呈高──低──高的马鞍形变化，果实含水率、果汁率、果汁的酸度、含糖量、可溶性固形物含量及果皮、果胞重量变化都和呼吸强度有明显关系。耐贮品种瓯柑与其他柑桔相比，其特点在于贮藏前期呼吸强度低，成熟较慢，贮藏后期果皮第二次生长更甚，呼吸强度上升更急，果实枯水速度更快。     

不同硬度番茄成熟果实贮藏期间的品质变化

为明确SHD,CHW,JL-1,JL-8,16等5个番茄品系果实品质差异及贮藏期间果实品质变化和耐贮藏性,以该5个不同硬度番茄品系为材料,通过在塑料拱棚栽培,对其果实品质及储藏期间果实品质变化进行研究。结果表明：采收当天品系SHD果实硬度最大;品系16可溶性固形物含量最高,果实硬度和呼吸强度均最小;品系JL-1的可溶性...     

不同柚品种果实贮藏后品质变化研究初报

１９９２－１９９４年对１３个柚品种果实进行了贮藏试验，结果表明，试验中所列柚类品种果实一品质均有所变化，大多数果实的糖，酸，Ｖｃ及果形指数下降，而果汁率，可食率的变化并无一定规律。     

香梨杂种后代亲本性状遗传倾向的研究

香梨与砀山梨等9个梨品种配置11个杂种组合，获得结果杂交单株882棵，对香梨杂种后代的果实大小、果形、肉质、香味、贮藏性，折光糖和果实综合品质等亲本性状遗传倾向进行了分析讨论。     

不同成熟度的海南红心火龙果果实在采后的储藏特性比较

为了研究不同成熟度的海南红心火龙果果实在采后的耐储性,以便为火龙果的采后保鲜技术提供理论指导,本实验以"金都一号"红心火龙果为实验材料,研究了七成熟、八成熟和九成熟3种不同采摘成熟度的果实在采后贮藏中的品质变化,同时,通过测定其在采后贮藏期间的可溶性固形物(TSS)、花青苷、超氧化物歧化酶(SOD)、过氧化物酶(POD)、丙二醛(MDA)的含量以及其病情指数、失重率、p H值、抗氧化活性(DPPH)等生理指标,比较了不同成熟度的火龙果在采后贮藏品质的差异.结果显示:八成熟果实的TSS和p H值与七成熟果实的TSS和p H值在贮藏期间的差异显著(P 0. 05);贮藏前6天,九成熟果实的TSS含量差异不显著,但是6天后九成熟果实的TSS含量下降趋势明显;八成熟果实的病情指数显著低于七成熟和九成熟果实的病情指数,七成熟果实的失重率最高,九成熟果实的失重率最低;抗氧化活性和花青苷的含量变化由高到低的顺序依次是九成熟果实八成熟果实七成熟果实;八成熟果实的SOD和POD活性高峰出现的时刻比七成熟和九成熟果实的SOD和POD活性高峰出现的时刻延迟2天.储藏期间的综合指标表明:八成熟的果实在采后其贮藏品质较好,因此可将其作为海南红心火龙果的采摘依据.     

瓯柑和红杏果实采后体内几种酶活性的研究

易枯红桔和耐枯瓯柑果实采用体内几种酶活性的比较研究结果表明，这两种柑桔体内的过氧化物酶、超氧物歧化酶、抗坏血酸酶的活性及丙二醛含量在其贮藏期间的变化具有明显规律性和差别，这几种酶活性的变化对柑桔果实采用衰老枯水起着十分重要的作用。     

超声协同钙浸渍对樱桃番茄贮藏过程中番茄红素和品质特性的影响

通过研究超声协同钙浸渍处理对樱桃番茄贮藏过程中理化品质和番茄红素的影响,阐明了超声协同钙浸渍提高樱桃番茄品质特性的原因。采用质构仪、色差计和高效液相色谱仪研究了樱桃番茄贮藏过程中硬度、色泽和番茄红素含量的变化,同时利用核磁共振技术分析了樱桃番茄贮藏过程中番茄红素结构特性的变化。研究结果表明:超声协同钙浸渍处理可促进钙离子渗入到果肉组织中,有效延缓贮藏期间樱桃番茄硬度的下降,同时抑制果实褐变指数、失重率和腐烂率的上升,维持番茄果实较高的可滴定酸和维生素C含量;与对照组相比,超声协同钙浸渍对樱桃番茄全反式番茄红素含量无显著性影响。核磁共振结果表明,超声协同钙浸渍处理有效抑制了樱桃番茄贮藏期间全反式番茄红素、5-顺式番茄红素和9-顺式番茄红素的氧化,维持了其结构完整性。超声协同钙浸渍技术可较好地维持樱桃番茄贮藏期间的营养和品质,研究结果旨在为超声协同钙浸渍技术在果蔬保鲜中的应用提供理论依据。     

槟榔贮藏保鲜技术研究

本文对槟榔贮藏保鲜的最适温度、湿度及贮藏环境中氧和二氧化碳等气体成分的最适组成进行了研究。结果表明，采用涂膜处理和硅窗气调贮藏相结合的方法最佳。它能使槟榔保鲜贮藏四个月以上，其果实的自然损耗率、腐烂损耗率都能控制在较低的水平下，保持了较高的商品率。具有较大的推广价值。     

柑桔频率特性及果汁电学参量变化初探

介绍了紫外线辐射柑桔后,柑桔果实频率特性及果汁电导率、介电常数等物理参量随贮藏时间变化的规律.实验结果表明,以紫外辐射60min效果最佳,贮藏四个多月后,果实腐烂率为18%.同时还阐述了在与果实呼吸强度及果汁的酸度、维生素C等生理参量对比分析的基础上,对用物理方法保鲜柑桔提出了初浅看法.     

贮藏条件和贮前品质对猕猴桃贮藏效果的影响

研究了几种简易贮藏方式对“米良1号”猕猴桃果实贮后性状的影响, 果实硬度和可溶性固形物的变化规律.结果表明:以100~ 125 g的“米良1号”无伤正常果进行常温换气贮藏,贮后90 d 优质果率比较理想; 果实入贮后的前30 d是果实硬度下降最快、可溶性固形物上升最快的时期.     

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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