查询词典 recombination

A series of progresses on the plant transgenosis and microorganic recombination techniques,has developed the new fields and pathways of integrated pest managementfor crops.

植物转基因和微生物重组技术的一系列突破，开拓了作物有害生物综合治理(Integrated Pest Management， IPM )技术的新领域和新途径。

Hepatopancreas cDNA expression libraries of normal and disease-resistant shrimp Penaeus monodon were constructed by k ZAP Express vector. The titer, capacity, recombination ratio and the size of the inserted cDNAs of two libraries showed they were effective and could be used in the research of shrimp genes.

用λZAP Express载体分别构建了正常虾和抗病虾肝胰腺的cDNA表达文库，经鉴定其各项指标(包括滴度、库容量、重组率和插入片段长度等)后表明，这两个文库都是合格的，可用于对虾基因的克隆和研究。

Firstly, an invasive species must be invasive enough in itself or has some biological distinction, such as quantitative and qualitative differences in the genome, or patterns of recombination. Secondly, to invade successfully, a new environment for an invasive species must be invasible, and this we may call the ecological basis of invasion. An invasive species may need to establish new interactions with other species, especially those mutualistic relations such as animal related pollination, seed dispersal by animals, mycorrhizal fungi, and symbioses between plants and nitrogen fixing bacteria.

首先从其自身来说，需要有足够的入侵性，这可以认为是入侵种的生物学基础，可能表现为具有多倍性、一定的遗传变异、杂合性或表型可塑性，以及不同的交配系统等；其次一个物种的入侵成功还取决于入侵生境的可入侵性，这可以认为是入侵种的生态学基础，而新的种间关系的形成，尤其是入侵种与其他种类的互惠共生关系的建成是关键。

The results suggest it be possible to establish the recombination bacteria of Nitrosomonas to oxidize the ammonia in wastewater.

第二步 ，由亚硝酸盐氧化成硝酸盐；其中第一步较慢，是限制性步骤，通过亚硝酸细菌完成，而在此过程中直接起作用的酶是氨单加氧酶(ammoniummonooxygenase，AMO)。

Objective: On the basis of the random mutagenesis library of ARS, we wish to preparation by screening new ARS sequence which not only have higher ARS activity, but also display higher transformation frequency, in order to constructed new gene recombination vector which have higher efficiency in the Nonconventional yeast expression system.

目的：通过构建酵母ARS 随机突变体库，从中筛选出具有较强的转化效率的ARS序列，用以构建新型高效的克鲁维酵母基因工程载体。

It is shown that nonequilibrium underdense plasmas and candidate ions for recombination laser schemes can be obtained.

利用自编制的程序，以类He氮为例，研究了在这种等离子体波导中，产生复合机制X射线激光的过程。

Chiasmata represent a mutual exchange of material between homologous,nonsister chromatids and provide one mechanism by which RECOMBINATION occurs,through the splitting of linkage groups.

交叉是同源的非姐妹染色单体之间出现的互换的现象，并且提供了一个发生重组的机制。

These results indicated that the genetic variation within exon 2 appeared to have largely arisen by gene recombination and balancing selection. Alignment of the deduced amino acid sequences of the β1 domain coded by exon 2 revealed 6 synonymous mutations and 27 nonsynonymous substitutions at the 33 disparate sites.

对B-LBⅡ等位基因第二外显子所编码的B-LBⅡ分子β1结构域氨基酸序列比对发现，31个B-LBⅡ新等位基因属于26个等位基因主型；在β1结构域氨基酸序列的33个变异位点上，存在6个同义替换和27个错义替换。

He has been the president of California Institute of Technology since 1997. He received Nobel Price when he was only 37, and has made great contribution to fields like DNA recombination, nosogenesis of virus, gene's transcription and control, and signal transmit in immune.

他从1997年起就担任加州理工大学校长，37岁时获得诺贝尔奖，并且在重组DNA研究，病毒的致病机理，基因转录调控，免疫学中的信号传导等领域做出了杰出的贡献，产生相当深远的影响。

In addition, the recombination for large numbers of charge carriers would occur in the volume or on the surface of TiO_2. Therefore, the extension of the photoactive wavelength region of TiO_2 into the visible region and improvement of quantum efficiency are desirable for popularizing more TiO_2 photocatalyst, especially under solar light for industrial areas or poor interior lighting illumination in living spaces.

但纳米TiO_2具有较宽的禁带宽度，只能吸收太阳光中5%左右的紫外线，而太阳光中近45%的可见光在处理污染物中却得不到有效利用，因此太阳能的利用率较低，这就限制了其实际使用范围；另外，TiO_2半导体载流子的复合率较高，因此量子效率较低。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。