《吕氏春秋》的反问句研究

在穷尽考察《吕氏春秋》疑问句的基础上，对其中的反问句从形式特征、语义模式和语用功能三个方面进行描写和阐释，着重揭示不同形式的反问句的语义蕴涵和语义模式。认为《吕氏春秋》中反映出来的反问句无论是在形式上还是在功能上都已经十分接近现代汉语的反问句状态。     

Effect of hydrogen peroxide on the binding of Merocyanine 540 to human erythrocytes

The fluorescent dye Merocyanine 540 (MC540) is often used as a probe to monitor the molecular packing of phospholipids in the outer leaflet of biomembranes. In a previous study we showed that the increased staining of erythrocytes with a perturbed membrane structure was mainly due to an increase in the fluorescence yield of cell-bound MC540, rather than to an increase of the number of bound molecules. Erythrocytes and ghosts exposed to continuous fluxes of H₂O₂ exhibited pronounced lipid peroxidation. Further, red blood cells subjected to this form of oxidative stress also showed increased staining with MC540. It appeared that this was caused by a strong increase in binding of MC540, together with a slight red shift of the fluorescence emission maximum and a small increase in the fluorescence yield of bound MC540. The changed MC540 binding characteristics were not observed when lipid peroxidation was suppressed by the presence of the antioxidant BHT in the incubation medium. However, open ghosts exposed to H₂O₂ showed no increase of MC540 binding, excluding a direct involvement of lipid peroxidation. Measurement of fluorescence emission spectra and gel filtration studies showed that MC540 can bind to H₂O₂-exposed hemoglobin. Experiments with erythrocytes lysed in hypotonic medium after exposure to H₂O₂ revealed that peroxidation of lipids with H₂O₂ induced a non-specific permeabilization of the plasma membrane to MC540, thereby allowing MC540 to bind to the oxidatively denatured, more hydrophobic hemoglobin. These results indicate that conclusions about packing of phospholipids in the outer leaflet of the membrane based on increased MC540-staining should be drawn with care. Received 27 September 1996; received after revision 5 November 1996; accepted 27 November 1996     

短跑技术教学中摆臂动作的研究

对摆臂动作在短跑教学与训练中的作用作初步分析．实验表明，手臂的摆动在短跑中是提高步长与步频的一个重要部分，步长与步频的提高又是提高短跑成绩的重要途径．     

卤化物与水玻璃复合物的抑尘性能

在恒温箱中测定了粉尘试样添加ＣａＣｌ２或ＭｇＣｌ２和水玻璃后的含水率与环境温度、湿度、有效抑尘时间等因素之间的关系．研究结果表明：（１）当环境温度低于３１℃，相对湿度高于６０％，粉尘试样中ＣａＣｌ２和水玻璃含量的质量分数分别达到２０％和１０％（ＭｇＣｌ２和水玻璃含量的质量分数为２３％和１１．５％）时，试样的含水率就能保持大于５％（质量分数）；（２）当环境温度低于４０℃，相对湿度高于５０％，粉尘试样中ＣａＣｌ２和水玻璃含量的质量分数分别达到２６％和１３％（ＭｇＣｌ２和水玻璃含量的质量分数为３０％和１５％）时，试样的含水率就能保持大于５％（质量分数）；（３）ＣａＣｌ２或ＭｇＣｌ２与水玻璃复合后，其粘尘功能进一步增强，而且其溶液的弱酸性得到进一步降低。     

多孔催化剂非线性扩散—反应边值问题的近似解

基于大参数的假设提出了求解多孔催化剂内部非线性扩散—反应边值问题近似解的方法。在近似解的基础上，得到了计算有效因子的数学表达式。针对幂函数型动力学方程和Langmuir－Hinshelwood型动力学方程，计算了三种不同形状催化剂颗粒的有效因子。计算结果表明有效因子近似解与用数值方法求得的数位解在较宽多数范围内很吻合。本文提出的有效因子计算方法使用方便，计算快速。     

Induction of autotomy in the American bird grasshopperSchistocerca americana (Drury) by the ecdysone agonist RH-5849 and investigation of its mode of action

The non-steroidal ecdysone agonist RH-5849 (1,2-dibenzoyl-l-tert-butylhydrazine) was found to be an effective neurotoxicant on injection into the American bird grasshopper,Schistocerca americana (Drury). Treated grasshoppers became immediately hyperactive, followed by loss of coordination, paralysis and eventually death. We also discovered that this compound induced bilateral autotomy of the metathoracic legs during the early stages of intoxication. However, no evidence of ecdysonergic or morphogenetic activities was observed. Synergism studies with neurotoxins of known mode of action suggested that RH-5849 has a mechanism of action similar to that of 4-amino pyridine, which blocks potassium channels.     

大豆膳食纤维对成年大鼠腹腔脂肪积累及血脂和血糖水平的影响

运用药理生理学方法，观察了大豆膳食纤维对高血脂成年ＳＤ大鼠的体重增长、腹腔脂肪的积累、血清胆固醇和血糖水平的影响。与对照组比较，在实验的第１４天，高膳食纤维实验组体重增长率为对照组的－２２．７８％，腹腔脂肪重量变化率为－５９．５７％，血清甘油三酯水平变化率为－３０．１１％，血清胆固醇水平变化率为１４．２４％，血糖水平变化率为１０．３９％。结果表明，大豆膳食纤维对控制成年大鼠的体重增长，减少腹腔脂肪的积累，降低高胆固醇和高脂肪摄入后血清甘油三酯和胆固醇含量，以及降低血糖水平具有明显的作用。     

N，N＇－1，4－亚丁基双螺吡喃和双螺噁嗪的合成及光致变色性能

合成三种Ｎ，Ｎ＇－１，４－亚丁基双螺吡喃和双螺噁嗪光致变色化合物，通过红外光谱、核磁共振氢谱及元素分析确证其结构。这些化合物熔点比相应的单螺环化合物高。还研究了闭环体与开环体（部花菁）的光致变色性能，发现双螺环化合物开环体的热稳定性较单螺环化合物高。     

DeLuca－Termini混合熵的合理性分析及其推广

对ＤｅＬｕｃａ和Ｔｅｒｍｉｎｉ提出的混合熵的合理性进行了分析并加以推广，对其性质作了详细证明。并指出，本文混合熵的表达式具有更明确的数学及物理含义。