金背大红花瓣的组织培养方法

以菊花花瓣为外植体，在无菌条件下诱导愈伤组织，再由愈伤组织进行芽诱导．利用花瓣组织培养易变异的特性，以期培养出新品种．本实验中探讨了6-BA、NAA在诱导愈伤组织和芽诱导中的影响，并获得MS＋6-BA2mg／L＋NAA0．5mg／L为芽诱导的最佳培养方秦．     

兰州百合的核型分析

报道了兰州百合的染色体核型,其核型公式为2n=2X=24=2m(2SAT) 2sm 6st 14t,属于3A型,核型不对称性系数(As.K%)为81.37%。其中第一对染色体的短臂上具有居间随体。     

稀土元素对黄粉虫生长繁殖的影响

用含不同剂量稀土的饲料喂养黄粉虫，发现在每公斤饲料中添加100mg氧化镧可使黄粉虫的一些重要的生理指标发生明显的变化：①在生长力方面，幼虫的生长速度显著加快，幼虫的存活率有所提高；②在繁殖力方面，雌虫提前两天产卵，雌虫的产卵期缩短了5天，雌虫的产卵量显著提高，实验结果还表明稀土在黄粉虫体内的蓄积量很低，稀土处理50天的幼虫主要营养成分含量无显著变化．     

自适应运动矢量精度在插值算法中的应用

根据对H.26L视频图像编码算法的研究,提出了一些新的有效的编码方法.在运动估值和运动补偿方面,采用立方卷积插值算法替代双线性插值以获得更高的估值精度,并提出混合插值与自适应运动矢量精度(AMVA)相结合的算法,着重就平均峰值信噪比、压缩效率和主观图像质量做了分析和比较.从实验结果看,算法获得了满意的效果,实现的H.26L软件编解码器在压缩比方面较H.263软件编解码器有明显提高,具有较大的实用价值.相信所做的工作对甚低码率视频图像编码的实际应用和推广将起到一定作用.     

"双微"整合教学模式与开发学生多元智能的尝试及思考

根据教学实践，提出将计算机辅助教学和微型实验这两种教学手段，有机整合，形成一种切合当前教学实际的教学手段。用实例证明，通过“双微”整合教学，能取得良好的教学效果。     

一种非线性方程的强非线性共振的转迁集

运用多尺度法和改进的L-P方法,通过引入参数变换把较大的摄动参数ε转换成小参数α,从而使讨论的非线性方程可用多尺度法和L-P方法求其近似解。求出了该方程亚谐共振(即k=1/2)时的分岔响应方程和转迁集。     

R&D co-operation and innovation a microeconometric study on French firms

The scope of this paper is to report new empirical evidence on the determinants of R&D co-operation. Indeed, the literature on the capabilities of firms emphasises the role of knowledge in the performance and evolution of firms who use knowledge developed in others to build their own knowledge capital. R&D co-operation between firms is one of the many strategies by which this knowledge may be transmitted. Several theoretical models have stressed that R&D co-operation is more likely when the level of spillovers is high. While this supposition is used in many theoretical models, it has rarely been tested before. Our results do not lend strong support to this intuition. Indeed, our spillover variables (national pure spillovers, national rent spillovers and imports of machine tools), which were supposed to match the theoretical notion of spillovers used in these theoretical models have a positive but not a significant role when explaining R&D co-operation. The R&D co-operation increases with size and with R&D intensity, but not with market share. It also increases with the budget spent on paying license fees and on acquiring patents and labour from foreign firms. In this study, we also analyse the determinants of innovation. In more precise terms, we compare the effects of R&D co-operation to those played by traditional internal factors and those exerted by external, pure and rent spillovers on the innovation capacity of the firms. Our results show that the commercial success of innovations of French firms depends mainly on size, market share, R&D intensity and human capital. Inward FDI from industrialised countries exerts a positive and significant effect. The finding highlights the important role of the absorptive capacity of firms. Spillover measurements, such as the acquisition of machine tools, foreign patents, licenses, and technological opportunities have a positive impact on innovation.     

不同品种黄瓜幼苗光合机构对盐胁迫的响应

研究了盐胁迫(0、25、50mmol／L)对不同品种黄瓜幼苗生长、光合作用和叶绿素荧光的影响．结果表明，盐胁迫，尤其是高浓度NaCl(50mmol／L)的胁迫，显著降低黄瓜幼苗生长量、叶绿素含量、光系统Ⅱ光合电子传递量子效率(φPSⅡ)、净光合速率(Pn)、气孔导度(Gs)以及气孔限制值(Ls)，同时显著提高叶片相对电导率、丙二醛、脯氨酸含量和细胞间CO2浓度(Ci)，光系统Ⅱ的光化学效率(Fv／Fm)变化不大．盐胁迫对耐盐黄瓜‘津研4号’幼苗生长的影响小于盐敏感黄瓜‘津绿4号’，这可能与耐盐黄瓜在盐胁迫下较高的净光合速率、光系统Ⅱ光合电子传递量子效率和较低的丙二醛(MDA)含量、相对电导率有关。     

中国水生植物新记录属——钻叶荠属(十字花科)

 报道中国十字花科一新记录属¾钻叶荠属Subularia L. 及一新记录种¾钻叶荠S. aquatica L.。