荔枝LitchiChinensisSonn果皮热处理护色技术的探讨

选择妃子笑,糯米糍,淮枝等广东省主栽荔枝品种,比较研究了不同热处理技术包括热水（及沸水）,热空气,热蒸汽及其实施配合浸酸处理对荔枝皮颜色保持的效果。结果表明：果实分别经９８℃沸水３ｓ,５６℃热水５ｍｉｎ,高温条件下９５℃,热空气５ｍｉｎ,或９５℃,热蒸汽３－５ｓ处理后再在ｐＨ０．６的ＨＣｌ溶液中浸泡５ｍｉｎ,或９５℃,热蒸汽３－５ｓ处理后再在ｐＨ０．５的ＨＣｌ溶液中浸泡５ｍｉｎ,能有效提高并稳定保     

速冻蔬菜的最适烫漂时间与其过氧化物酶活性测定研究

本试验以各种蔬菜：菠菜、芹菜、花菜、芦笋、土豆、大头菜、蒜苗中的过氧化物酶活性为研究对象：在不同温度下进行烫漂处理后其ＰＯＤ活力具有再生现象，于是确定在９５°Ｃ下烫漂得到不同蔬菜的最佳烫漂时间分别为菠菜１ｍｉｎ，蒜苗２．５ｍｉｎ，芹菜３ｍｉｎ，芦笋４ｍｉｎ，青菜１．５ｍｉｎ，大头菜１．５ｍｉｎ，花菜２．５ｍｉｎ，土豆３ｍｉｎ；还进一步比较研究了添加柠檬酸、Ｎａ＿２ＣＯ＿３、ＣｕＳＯ＿４等化学药品对蔬菜烫漂处理中ＰＯＤ活性的影响，结果用适宜浓度的Ｎａ＿２ＣＯ＿３（１０￣（－５）Ｍ）或ＣｕＳＯ＿４（４．０×１０￣（－４）Ｍ）溶液烫漂处理具有护色和杀酶的协同效果。     

MAP技术保鲜损伤生菜研究

采用各种预处理方法加强ＭＡＰ（ＭｏｄｉｆｉｅｄＡｔｍｏｓｐｈｅｒｅＰａｃｋａｇｉｎｇ）技术保鲜损伤生菜的效果;具体研究了紫外线、Ｈ２Ｏ２、ＮａＣｌＯ、乙醇、５３℃热水等预处理方法与ＭＡＰ协同对损伤生菜贮藏品质和微生物的影响。结果表明,经Ｈ２Ｏ２（０．１５ｍｌ／Ｌ,１ｍｉｎ）处理后ＭＡＰ（Ｏ２：１．５～２．０％,ＣＯ２：２．０～２．５％）４～５℃贮藏效果最佳。另外,低温、Ｈ２Ｏ２、ＭＡＰ对微生物有较好的抑制作用     

皮革蛋白粉中微量铬（Ⅲ）的光度法测定

皮革蛋白粉中微量铬（Ⅲ）与二甲酚橙，在ｐＨ＝４．５～５．０的ＨＡｃ—ＮａＡｃ缓冲溶液中，于沸水浴上反应２０～３０ｍｉｎ，生成１：１的紫红色螯合物。λ＿（ｍａｘ）＝５４２ｎｍ，表观摩尔吸光系数１．５×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。铬（Ⅲ）浓度在０～５０μｇ／５０ｍＬ范围内符合比耳定律。     

橡胶硫化促进剂NS的合成

粗Ｍ不进行精制，直接用于合成橡胶硫化促进剂ＮＳ，降低了生产成本，避免了将粗Ｍ精制成精Ｍ过程中造成的环境污染。当粗Ｍ：叔丁胺：次氯酸钠的摩尔比为１：１．７：０．６，反应温度为４５￣５５℃时，产品收率可达８１％以上（以粗Ｍ中所含纯Ｍ的量计算），对产品质量进行检测，当加热减量≤０．５％，ＮＳ的熔点≥１０３℃。     

中药止血散的止血作用初探

本实验选用ＮＩＨ小鼠，随机分成Ⅰ、Ⅱ、Ⅲ三组，用环磷酰胺建立小白鼠再生障碍性贫血动物模型．实验结果显示：出血时间Ⅰ（对照）组（１．５８±０．１５）ｍｉｎ，Ⅱ（环磷酰胺）组（５．２３±０．２７）ｍｉｎ，Ⅲ（环磷酰胺＋止血散）组（１．５７±０．１）ｍｉｎ；统计学处理表明Ⅱ与Ⅰ组间有差异（ｐ＜０．０５），Ⅱ与Ⅲ组间有差异（ｐ＜０．０５），Ⅰ与Ⅲ组间无差异（ｐ＞０．０５）；血块回缩分别为完全、不良、完全，血小板计数分别为４３０．２±３４．３６×１０￣９Ｌ￣（－１），２８４±１９．９６×１０￣９Ｌ￣（－１），４６５．４±２２．４８×１０￣９Ｌ￣（－１）．统计处理表明Ⅱ与Ⅰ组间和Ⅱ与Ⅲ组间存在显著性差异（ｐ＜０．０１），Ⅰ与Ⅲ组间无差异，本实验提示：中药制剂止血散能促进血小板的生成和血小板的释放，具有止血作用．     

蓖麻油微波裂解制备癸二酸的研究：无溶剂法

以蓖麻油为原料，无溶剂条件下经微波辐射裂解制备癸二酸，最佳工艺条件为：氢氧化钠（ｇ）：蓖麻油（ｇ）＝１．５：１．０，碱浓度为５５．６％，微波功率为１６０Ｗ，裂解时间２２ｍｉｎ，癸二酸产率达９６．５％，与传统方法比较，反应时间缩短了３０倍，节约了能耗，减少了污染，降低了成本。     

致富门路

致富门路水果保鲜贮藏法沙２０厘米，密封缸内，放在通风处贮藏。细沙的湿度以手捏成团、落地松散，每层用量以覆盖不见果实为准。（３）涂蜡贮藏法采用２号或３号涂料原液与水１。１．５或ｌ。１．２的比例配成涂料，抹涂于果皮，蒂部宜多涂。也可用凡士林代科涂果，然后...     

AlSi7Mg枝晶合金半固态加热时的组织演变

利用电阻炉研究了ＡｌＳｉ７Ｍｇ枝晶合金半固态加热时的组织演变。研究表明：在（５８９￣５９７±１）℃下，保温５￣１２０ｍｉｎ，初生α枝晶难以完全转化为球状的α相；在较高的半固态加热温度下，若保温时间过长，试样会存在不同程度的变形。     

铅（II）－1－［（5－溴－2－吡啶）偶氮］－2，7－萘二酚－吐温－80体系光度法测定铅的研究

研究了在吐温－８０存在下，铅（ＩＩ）与合成的１－［（５－溴－２－吡啶）偶氮］－２，７－萘二酚（简称５－Ｂｒ－ＰＡＤＮ）的显色条件和光度特性。非离子表面活性剂吐温－８０主要起增溶作用。显色反应在５０℃时１０ｍｉｎ内即可完成，配合物在ｐＨ３．０～６．０之间的吸光度大而稳定，最大吸收波长λｍａｘ＝５９０ｎｍ，摩尔吸光系数ε＿（５９０）＝８．３１×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）．Ｐｂ￣（２＋）含量在０～２０μｇ·（２５×１０￣（－３）Ｌ）￣（－１）范围内遵守比尔定律。拟定方法的选择性较好，已用于树叶表面上和人发中铅的测定，获满意结果。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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