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- negative selection principle 反向选择机理
- Selection principle on the squeezing casting techniques was discussed. 论述了挤压铸造技术方案的选择原则。
- Because thymic dendritic cells are the potent antigen presenting cells in the thymus, they must play an important role in thymic negative selection. 胸腺树突状细胞作为胸腺内功能强大的抗原呈递细胞,在阴性选择中必定发挥着不可忽视的作用。
- During breeding for vertical resistance, horizontal resistance tends to decline because of negative selection pressure. 当培育垂直抗性时,由于负的选择压力,水平抗性趋于下降。
- The select principle of drawing interval was given for different coal-gangue fragmental size. 给出了不同煤矸块度条件下的放煤步距选取原则。
- The parameter selection principle and design process of multistage DMF were presented. 讨论了多级非线性双质量飞轮的各个参数的选取原则。
- The process of thymic negative selection is the process of the central immunologic tolerance, namely the process of autoreac-tive thymic cells being deleted or becoming allergy. 胸腺内阴性选择的发生过程也就是中枢免疫耐受的形成过程,即自身反应性胸腺细胞被克隆清除或处于免疫无能状态的过程。
- The functions of cutting edge inclination angle were expounded in this paper,Selection principle and its reference quantity were sumed up also. 本文对刀具刃倾角的功用进行了较详细的阐述,并归纳出了其合理选用的原则和参考值。
- An immune algorithm is developed for job-shop schedule problem based on the clonal selection principle of the natural immune system. 基于免疫系统的克隆选择机制,提出一种求解车间作业调度问题的免疫算法。
- Through positive and negative selection, the thymocytes with high avidity for self peptide-MHC complex were eliminated, but retained low but significant reactivity for self-peptides. 近年有关外周T细胞群体存活与稳态的深入研究发现:抗原活化前T细胞的存活需要自身肽MHC复合物的作用以提供适度的存活信号;
- Based on the clonal selection principle and idiotypic immune network theory of biological immune system,a dynamic clonal adjustment strategy(DCAS)is proposed. 基于生物免疫的克隆选择和独特型免疫网络机理,提出了动态克隆调节策略(DCAS)。
- This paper discusses the evaluation and selection of elec tronic document from three respects:selection principle,evaluation indicators an d acquisition strategy. 本文对电子文献的选购原则、评价指标以及选购策略进行了初步探讨。
- And the principle,object and selection principle of technological parameters of stabilizing treatment for improving the anti stress relaxation ability are given. 分析改进抗应力松弛性能的稳定化处理的原理、目的要求及工艺参数的选择原则。
- The main research content of the dissertation involves:1.The selection principle of optimal pathlength in multivariate calibration is proposed and established. 论文的主要研究内容为:1.首次提出并建立了多变量光谱分析中最佳光程长的选择原理。
- The influence of air-gap length to the permanent magnet quantity and the togging torque is analyzed, and given the select principle of air-gap length. 分析了气隙长度对永磁体用量和失步转矩倍数的影响,确定了在满足失步转矩倍数要求的前提下气隙长度的选取原则。
- The selection principle of titanium and the structure design of titanium heat exchanger are expounded based on the actual design example of titanium heat exchanger in PTA unit. 基于精对苯二甲酸(PTA)装置中钛材换热器的实际设计范例,论述了钛材的选用原则及钛材换热器的结构设计。
- Based on the clonal selection principle and idiotypic immune network theory of biological immune system, a dynamic clonal adjustment strategy (DCAS) is proposed. 摘要基于生物免疫的克隆选择和独特型免疫网络机理,提出了动态克隆调节策略(DCAS)。
- Dendritic cell and thymic negative selection 树突状细胞和胸腺阴性选择
- The low toxicity mixed solvent of polychloroprene adhesive is gained.This paper discussed the selection principle of low toxic mixed solvent for polychloroprene adhesive. 制备了符合国家新标准,适用于氯丁橡胶粘合剂的混合溶剂,介绍了用于氯丁橡胶粘合剂的低毒混合溶剂的选择原则。
- Abstract: To improve the efficiency of targeted gene replacement (TGR), a dual screen (DS) system with gusA gene as negative selective marker (GUS-DS) was developed in Magnaporthe oryzae. 摘 要: 目标基因替换是基因功能研究的重要方法, 在生物工程领域广泛应用。