低能惰性气体原子与H2(D2、T2)分子碰撞分波截面理论的研究

用密耦计算方法及Tang-Toennies势模型计算了E=0.05eV时,He、Ne、Ar、Kr、Xe与H2(D2、T2)碰撞体系的分波截面,从而得到了H2分子及其对称同位素替代情形下整簇惰性气体原子与H2(D2、T2)分子碰撞分波截面随量子数增加和体系约化质量的变化规律.     

惰性气体原子与氢(氘、氚)分子碰撞微分截面研究

用Tang Toennies势模型和较高精确度的密耦(Close Coupling)近似方法,计算了E=0.05eV整簇惰性气体原子与氢(氘、氚)分子碰撞体系00 00弹性碰撞及00 02非弹性碰撞微分截面,得到了惰性气体原子与H2及其对称同位素替代碰撞体系微分截面的变化规律.结果表明,微分截面随体系的约化质量和角度的增加而变化.     

淀粉磷酸单酯的合成研究

用湿法由玉米淀粉和酸式磷酸盐制取淀粉磷酸单酯。探讨了淀粉浓度、磷酸盐的用量、ｐＨ值、反应温度、反应时间等因素对产物取代度的影响，确定了最佳的反应条件，淀粉磷酸单酯的取代度可达０．１８４。     

燃料乙醇是我国发展替代燃料的趋势

对燃料乙醇及燃料乙醇的发展现状进行了分析,并对我国今后发展燃料乙醇的方向、燃料乙醇对我国发展的推动作用进行了研究。     

Development of Triticum aestivum-Leymus racemosus ditelosomic substitution line 7Lr#1S(7A) with resistance to wheat scab and its meiotic behavior analysis

Leymus racemosus is highly resistant to wheat scab (Fusarum head bright). The transfer of scab resistant gene from L. racemosus to Triticum aestivum is of great significance for broadening the base of wheat resistance. In the present study, the pollen of T. aestivum-L. racemosus monosomic addition line with scab resistance was treated by irradiation with 1200 R 60Co-γ-rays prior to pollinating to emasculated wheat cv. Mianyang 85-45. Nine plants with a telocentric chromosome 7Lr#1S were observed in M1, and one ditelosomic substitution line 7Lr#1S was selected from selfcrossing progenies and confirmed by chromosome C-banding and GISH. Furthermore, a co-dominant EST-SSR marker CINAU 31 was employed to identify this substitution line. A pair of chromosome 7A of common wheat were found to be replaced by a pair of telocentric chromosome 7Lr#1S, and further investigation showed that chromosome configuration of the substitution line at MI of PMCs after GISH was 17.50○II W 2.19 IIW 0.42II7Lr#1S 1.08 I7Lr#1S 0.69 IW. Two telocentric chromosomes paired as a bivalent in 59.7% of PMCs. Abnormal chromosome behaviors of telocentric chromosomes were observed in part of PMCs at anaphase I and telophase I, including the moving of two telocentric chromosomes to the same pole, lagging and earlier separation of their sister chromatid. All these abnormal behaviors can be grouped into three distinct types of tetrads according to different numbers of 7Lr#1S in their daughter cells and various micronucleus in some tetrads. However, due to the high transmission frequency of the female and male gametes with a 7Lr#1S, 84% of the selfcrossing progeny plants had ditelosomic substitution. The substitution line showed high resistance to wheat scab in a successive two-year test both in the greenhouse and field; hence, the line will be particularly valuable for alien gene mapping, small fragment translocation induction and telosomic cytological behavior analysis.     

浅析排球比赛的暂停和换人艺术

暂停和换人是排球比赛中教练员临场指挥的最主要手段，其运用如何，直接关系到比赛的胜负．教练员应讲究暂停和换人艺术，选择适宜时机和办法来布置战术、指点迷津、鼓舞斗志和调配人员，以求克敌制胜．     

一个浮力成因实验的定量计算

从浮力产生的原因这一基本规律出发，采用替代法和数学推导得到小球浮起时液面高度差应满足的条件，给出一个浮力成因实验的高度差计算过程与结果．     

Co（Ⅱ）配合物引发的卤代芳烃SRNl反应的研究

第一次用二价钴的配合物作为单电子转移的自由基键式亲核取代反应(SRNl)的引发剂，对α—溴代萘与片呐酮碳负离子在DMSO中作用得到1—(α—萘基)片呐酮的反应进行了研究，对反应是经由SRNl机理进行了确证，对反应的条件与产率的关系进行了比较研究，为芳香卤代物的亲核取代提出了一种具有潜在应用前景的合成方法．     

几类变系数二阶线性微分方程的解法

给出了二阶线性微分方程求通解的一般公式,并对几类变系数的二阶线性齐次微分方程化为常系数的微分方程作了详细的讨论.