查询词典 recombination

Gametic selection was assessed with a doubled haploid population including 1 35 lines derived from anther culture of a typical indica and /japonica cross, ZYQ 8/JX 1 7, by investigating the segregation and recombination of morphological characters, isozymes and RFLP markers.

对典型的灿与粳稻杂种，窄叶青8号／京系17F1花药进行培养获得的132个双单倍体的形态特性、同工酶与RFLP标记的分离与重组进行了考察分析，研究是否存在配子选择问题。

Second, a lot of artificial propagation experiments were performed between different gynogenetic clones to analyze whether or not genetic recombination occurs by utilizing the identified RAPD and SCAR markers. Direct molecular genetic evidence for gonochoristic reproduction was revealed in the gynogenetic silver crucian carp, and a previous hypothesis that the silver crucian carp might reproduce both gynogenetically and gonochoristically was conformed.

二是利用银鲫的克隆多样性和其种群中存在的雄性个体，设计大量的不同繁育组合，运用已鉴定的RAPD和SCAR分子标记，分析比较了不同繁育组合子代的DNA扩增情况，探讨了这些分子标记在各个交配子代中的重组分布规律。

Telomere, a complex structure present at the ends of eukaryotic chromosomes, consists of tandam arrays of highly conserved hexameric repeats in vetebrates. Its function is to protect DNA from degradation of deleterious recombination.

端粒是由许多简单重复序列及相关蛋白组成的染色体末端复合结构，端粒酶是具有逆转录酶特性的核糖核蛋白复合物，能以自身的RNA为模板合成端粒重复序列，加至新合成的DNA链末端，维持端粒平衡从而保证染色体末端结构完整性及解决末端复制问题。

Loped by Dawson's research group, is the best TMV vector,which is much stable in systemic infection by inhibition of homological recombination.

PTB2是由Dawson实验室开发的一种TMV表达载体，是目前较好的植物病毒表达载体。

Fixation of direct dyes with silica gel ;2. Taking advantage of proof salt and high hydrophilic property of the silica gel and the carboxymethyl cellulose inarch polysalt of the super water-absorbent resin recombination,this paper made use of the water-absorbent composite form the inorganic polymer, sequentially advanced water-absorbent velocity and capacity of polymer water-absorbent resin in the brine.

利用具有良好耐盐和高亲水性能的硅凝胶与羧甲基纤维素接枝聚丙烯酸盐的高吸水树脂进行复合，制备出无机高分子的硅凝胶-羧甲基纤维素接枝聚丙烯酸盐耐盐高吸水复合材料，从而提高了高分子吸水树脂在盐水中的吸收能力及吸收速度，研究了复合材料的吸盐水性能，通过扫描电子显微镜观察了复合材料表面的微观结构，初步探讨了硅凝胶-羧甲基纤维素接枝聚丙烯酸盐耐盐高吸水复合材料的吸盐水机理。

Next,experimental results could be explained bya five-level model including either intersystem crossing or a process of ionizationand subsequently germinate recombination.

再次，利用一同时包含系际跃迁及电离—复合机制的五能级模型对实验结果进行了解释。

AIM Immunoglobulin class switch recombination in germinal center B cells results in the switch in expression from one Ig isotype to another isotype.

目的免疫球蛋白类别转换在生发中心B细胞中进行，从而B细胞由产生IgM转换到产生其他类别的免疫球蛋白如IgG， IgA， IgE。

Chapter 8: We discuss the acceleration of multigrid by Krylov subspace approaches, and recognize the reason for slow convergence of algebraic multigrid methods is that error reduction is significantly less efficient for some very specific error components which may cause a few eigenvalues of the algebraic multigrid iteration matrix to be considerably closer to 1 than all the rest. However, the eigenvectors belonging to the few isolated eigenvalues can be expected to be typically captured after only a few conjugate gradient iterations, which accelerate algebraic multigrid algorithms. Theoretical analysis and numerical results of some practical problems show the iterant recombination accelerates algebraic multigrid convergence.

第八章：先介绍用Krylov子空间迭代法加速一般多重网格方法收敛的基本框架，然后紧紧抓住引起代数多重网格方法收敛减慢的根本原因往往是误差减小对几个特别的误差分量不明显，这导致代数多重网格方法的迭代矩阵的几个特征值接近于1，而共轭梯度方法则能比较典型地捕捉属于孤立特征值的特征向量，从而推导出有效的共轭梯度加速算法和程序实现，不仅从一些具体的实际应用例子的数值结果去验证迭代复合加速收敛的效果，而且还从理论上分析了预处理共轭梯度法加速代数多重网格法收敛的机理。

The results showed that expression plasmid pET22b-lysB was constructed successfully. Highly purified recombination protein was obtained 33.2 mg from 1 L LB culture medium. A screening for His-LysB activity on esterase and lipase substrates confirmed the lipolytic activity. With p-nitrophenyl butyrate as substrate, the thermal stability of the enzyme was poor when the temperature was above 30oC. The enzyme exhibited higher stability at pH 5.0–9.5. The optimum temperature and pH for the lipolytic activity of His-LysB were 23oC and 7.5 respectively. Under the optimum conditions, the specific activity of His-LysB was 1.3 U/mg. Zn2+, Cu2+, Mg2+, Mn2+and phenylmethane sulfonyl fruoride severely inhibited the lipolytic activity of His-LysB.

结果表明：成功构建了pET22b-lysB表达载体，并从1 L的LB培养物中获得了33.2 mg高纯度重组蛋白；His-LysB具有分解脂肪的能力，属于脂肪酶；生物化学特性分析表明：丁酸对硝基苯为水解底物，His-Lys热稳定性不佳，30℃以下比较稳定，随着温度的升高，稳定性逐渐降低；该蛋白具有较高的pH值适应性，pH 5.0~9.5范围内稳定性较高；在23℃和pH 7.5时酶活力最高，其比酶活为1.3 U/mg；金属离子Zn2+、Cu2+、Mg2+、Mn2+和苯甲基磺酰氟抑制剂对酶活具有强烈的抑制作用。

Studies of the mechanism of meiotic recombination indicate that meiosis is an adaptation for repairing DNA.

减数分裂重组机制的研究表明，减数分裂是一个为了修复DNA的适应。

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。