浅析伊通河地表水中镉迁移转化的规律

通过近4a对伊通河长春段6个地表水监测断面中重金属镉的研究，结果表明，地表水中镉的含量随流程的增加而增加，年平均含量也在递增。此外，研究区域内，镉以Cd^2＋为主，且镉有接近超标并逐年升高的趋势。     

用重影线法求解两个平面立体的相贯线

提出了用重影线法求解两个平面立体的相贯线并判断可见性的新方法．对两条直线在某投影面上发生重影的现象进行分析，从空间角度认识其几何位置，由此得出重影线的定义．将其加以扩展，应用求解两个平面立体的相贯线的问题上，可以很快得出相贯线并判断可见性．     

抗白粉病的小麦-黑麦1BL/1RS易位系99/2439的cDNA文库构建

用pGEMT-easy质粒载体构建了经白粉茵诱导0.5h、1.0h、12h、24h和48h的小麦-黑麦1BL/1RS易位系99/2439叶片cDNA文库1个.文库宿主茵为E. coliDH10B,诱导文库平均插入片段为1kb左右.     

豆科锦鸡儿属云南锦鸡儿(Caragana franchetiana)染色体数目及核型研究

采取常规根尖压片法首次对豆科锦鸡儿属云南锦鸡儿进行了染色体数目和核型的分析统计。结果表明,云南锦鸡儿(Caragana franchetiana)为二倍体植物。其染色体数目2n=16,8对均为中部着丝粒染色体。核型公式为2n=2x=16=8m。最长染色体与最短染色体的长度比为1.2,臂比大于2的百分比为0,核型类别属于1A型,为较对称核型。没有观察到带随体的染色体。     

提高测量精度方法探讨

测量工作是一项精而细的工作,在精度方面尤为重要,精度的高低直接决定着矿井的安全生产,因此提高测量精度,减少测量工作量是测量工作中需要研究解决的问题。文章介绍了一种在导线测量中,既能提高测量精度,又能减少工作量的方法——边角分测法。     

关于椭圆抛物面与一般二次曲面相交的研究

本文通过对椭圆抛物面与其一般形式的二次曲面相交的研究，得出了求交线的一种方法．该方法的关键在于借助作辅助柱面定出交已知曲面于相似和位似椭圆的平面方向，然后根据情况或采用正、斜投影法，或采用空间亲似变换的方法，将平行于上述平面方向的辅助平面截已知两曲面所得的椭圆变成圆，从而准确求得交线上的各点．     

铜陵输电线路鸟害防治策略分析

对铜陵地区输电线路2005年到2011年的鸟害故障进行了统计分析，阐述了输电线路鸟害的成因、发生规律及现有防鸟害措施。在总结多年防治鸟害故障措施的基础上，提出了绿色防鸟的综合防治策略，有效地兼顾了输电线路鸟害防治及环境的保护。     

The short C-terminal hydrophilic domain of NhaH Na~ /H~ antiporter from Halobacillus dabanensis with roles in resistance to salt and in pH sensing

The Na /H antiporter plays key roles in maintaining low cytoplasmic Na level and pH homeostasis,while little is known about the Carboxyl-terminal hydrophilic tails of prokaryotic antiporters.In our previous study,the first Na /H antiporter gene nhaH from moderate halophiles was cloned from Halo-bacillus dabanensis D-8 by functional complementation.A topological model suggested that only nine amino acid residues(395PLIKKLGMI403) existed in the hydrophilic C-terminal domain of NhaH.The C-terminal truncated mutant of NhaH was constructed by PCR strategy and designated as nhaH△C.Salt tolerance experiment demonstrated that the deletion of hydrophilic C-terminal nine amino acid resi-dues significantly inhibited the complementation ability of E.coli KNabc,in which three main Na /H antiporters nhaA,nhaB and chaA were deleted.Everted membrane vesicles prepared from E.coli KNabc/nhaH△C decreased both Na /H and Li /H exchange activities of NhaH,and also resulted in an acidic shift of its pH profile for Na ,indicating a critical role of the short C-terminal domain of NhaH antiporter in alkali cation binding/translocation and pH sensing.     

水稻雄性不育细胞组织学的研究

水稻雄性不育系的花粉败育一般可分为无花粉型、单核败育型、双核败育型和三核败育型等四种。个别不育系花粉败育方式较特殊。野败不育系的花丝和药隔维管束退化最严重,花药开裂结构的异常主要表现在裂口、裂腔分化发育异常。     

Insulin requirement of human leukemic cell lines

Summary The growth characteristics of human leukemic cell lines in serum supplemented medium and in serum free medium with and without the addition of insulin were investigated. No relation was found between the insulin binding capacity of the cells and their hormone-dependence for growth.This work has been supported by grant CT82.00191.04 of CNR Rome and by Regione Piemonte.