论《雪国》中"雪"的意象的多重意蕴

《雪国》围绕岛村和驹子、叶子在雪国这个冰雪纷飞环境里的生活和情感变化，“雪”的意象不断闪现。雪对雪国的自然环境。对小说人物的情感演绎以及对川端康成思想情感的寄托。都有巨大的生成意义，从而使“雪”的意象至少具有了雪境自然、雪境情感、雪境禅韵三个层面的联结意义。     

炔同系物凝聚型物理性质递变规律研究

以H—(CH2)—C≡CH型同系物结构重复单元数值连续变化为模型，获得了描述该同系物凝聚型物理性质递变规律的数学表达式：P＝(a0 a1n a2n^)／(1十b2n^2)。通过非线性回归分析，得到回归方程，结果表明该同系物的凝聚型物理性质与重复结构单元数值之间满足上述关系式．并显示优良的相关性。     

Risk Assessment and Preservative Measures for Volatile Organic Compounds in Museum Showcases

ABSTRACT

The first step in preservative measures for artworks in airtight showcases is the exclusion of outgassing from construction materials or, at least, limitation of the emissions to a minimum acceptable level if the volatile organic compounds (VOCs) generated may be qualified as harmless. Once it is ascertained that the objects in the showcases are responsible for VOC emissions, a step forward becomes necessary, implying showcase ventilation with air flowing through active sorbent materials. Solid phase micro-extraction (SPME) followed by GC separation and MS identification has been applied for checking the outgassing characteristics of different types of materials used for the construction of airtight showcases, and the method was found particularly attractive in terms of speed and sensitivity, suitable for measurements in presence of low-emitting materials. Sampling could also be done in the case interiors, thus making possible detection and recognition of emissions from art objects within a case. A comprehensive preventive conservation scheme has been further devised by means of active air circulation within the showcase and functional sorbent materials along the flow, for complete suppression of gaseous compounds. Control of the compounds in the air flow and of their filtration efficacy was achieved by direct sampling, also using SPME fibers. Continuous monitoring of the air quality in the showcases has been developed with insertion of a photoionization detector capable of detecting the VOCs in the air by inducing molecular ionization, and measuring the generated photocurrent. The system is not selective, but gives the total concentration, reaching ppb sensitivity with high-quality data. In addition it includes temperature and humidity sensors, making the whole a useful instrument for environment control.     

脂肪族硝基有机磷化合物

研究β—硝基有机磷化合物的合成方法.     

氢键对含氮有机化合物性质和结构的影响

氢键广泛存在于气体、液体和晶体等各种状态之中，影响着物质的性质和结构。本文仅就氢键对含氮有机化合物的性质、化学反应和结构的影响作进一步的分析论证。     

含侧臂的Schiff碱型大环化合物的合成

以高氯酸钡为模板．用2，6-二甲酰基-4-叔丁基苯酚（Ⅰ）分别和1，5-二（2-氨基苯氧基）-3-氮杂戊烷（Ⅱ）及其3-取代物（Ⅲ～Ⅹ）缩合，得到的大环钡配合物不经纯化，直接用硫酸钠水溶液解络，得到了自由配体（Ⅺ～ⅩⅨ）．这些新型大环化合物均经元素分析、IR、1HNMR、MS等证实其结构．     

取代芳烃结构与生物活性关系研究

根据非氢原子类型分类、基于非氢原子相对电负性和非氢原子间距离等进行计算得到的分子电性距离矢量(MEDV)为描述子,对取代芳烃的结构进行表征.用多元线性回归(MLR)方法,研究并建立了取代芳烃定量结构-急性毒性(QSAR)关系的6变量模型,其复相关系数为0.970;采用SPSS统计处理软件对变量进行逐步回归(SMR)筛选后,建立了5变量的QSAR模型,其复相关系数为0.964.上述模型对26个取代芳烃的急性毒性的预测值与实验值能较好吻合.留一法进行交互检验,结果表明所建模型具有良好的稳定性和预测能力.     

芳烃的选择性间接电氧化

以Ce^4 ／Ce^3 为氧化还原体系，以硫酸为支持电解质，采用槽外法研究了侧链芳烃的选择性间接电氧化。得出Ce^3-转化为Ce^4-最佳电解条件：电流密度0．01A／cm^2；硫酸浓度，0．3mol／L；亚铈浓度，0．5mol／L；通过电量2F／mol(F为理论电量)。电解生成的Ce^4 氧化芳烃生成相应的醛、酮，反应具有选择性好、产率高、无污染等优点。     

主族元素的桥联配合物

桥联配合物是从化学键的角度通过桥配体结合起来的化合物．多核配合物是从原子数目上讲含有多个金属原子的化合物，从概念上讲二者略有不同，不能将他们混为一谈．文章讨论了二者的联系与区别，提出了桥联配合物的定义、命名，并研究了主族元素桥联配合物的结构与功能和在周期表中形成的倾向性。