precursor [pri(:)'kə:sə]

precursor的基本解释

n.

先驱者, 前导, 先进者

precursor的同义词

n. forerunner

与precursor相关的网络例句 [注：此内容来源于网络，仅供参考]

It was found that because of the difference in component distribution and structure, the tendency that pores furcate and bend was smaller in amorphous precursor than in crystalline precursor, and for the amorphous precursor, the velocity of Al leaching-out and the expanding of specific surface area of catalyst were more sensitive to activation process parameters.

结果发现，由于两者在组元的分布及结构上的差异，非晶态前置体合金在活化过程中形成的微孔发生弯折、分叉的倾向要小于晶态前置体合金，同时前者在活化过程中的抽Al速率、以及所得到的催化剂的比表面积等对活化工艺更为敏感。

A pair of primers that contained flanking hydropathic amino acid codons were synthesized, to amply the sequence coding for 10~34 aa in the precursor sequence. The amplified fragment was inserted into pRSET-A to generate the first double repeat of the precursor gene. By utilizing a pair of isocaudamer BamH I and Bgl II sites, and another downstream Hind III site of plasmid pRSET-A, following a series of simple double digestions and ligation of the resulted products, a series of repeat (3, 4 and 6) precursor peptide fragment genes were derived.

本实验设计一对两侧含编码疏水性氨基酸密码子的引物，经过扩增前导序列10~34aa基因序列，并重新克隆入质粒pRSET-A构建串联二聚体后，再利用质粒pRSET-A的BamH I / Bgl II同尾酶克隆位点，经一系列简单的酶切和连接，快速构建这一前导肽中不含组氨酸标签序列的串联多聚体基因，并成功表达其六聚体重组蛋白。

The comparative investigation of the characteristics of deformation and AE were conducted and the results are presented as followed: 1. The characteristics of rock AE are correlated to the strength, joints, cracks, and the size and hardness of crystalline grain. 2. The sequence of AE can be divided into four phases: beginning phase, tempestuousness phase, drop phase and dreariness phase. The loss and the duration of the phases are correlated to the rock character and flaws in the rock. 3. The AE rate characteristics are not almost concordant with the AE energy rate. 4. Besides the homogeneity, the strength of rock contributes the activity of AE. The higher the strength is, the lower the activity is. 5. There is a dreariness phase before the failure of most kinds of rock. 6. Whether the precursor is obvious is correlated to rock the character, and the precursor of AE rate is more apparent than the precursor of AE energy rate comparatively.

通过对比研究这六种不同岩石的变形和声发射特征发现，岩石声发射受到岩石强度、节理裂隙和晶粒软硬大小等的影响；岩石声发射过程存在初始区、剧烈区、下降区和沉寂区，各个阶段是否存在及持续时间与岩石强度、内部缺陷等有关；岩石的声发射事件率特征与能量率特征并不完全一致；岩石的声发射活性除了受其均匀性影响外，还受到岩石的强度影响，强度越小，声发射活性越强；大多数岩石破坏前存在一声发射沉寂区；岩石的破坏前兆是否明显跟岩性有关，相比较而言，岩石破坏时的声发射率前兆比声发射能量率前兆更为明显一些。

与precursor相关的网络解释 [注：此内容来源于网络，仅供参考]

precursor：前体

比希自己在回应麦当劳的批评时对麦当劳的老鼠夹设计有过非常详尽的分析1.比希指出麦当劳的一系列"还原(约化)的"设计并非比希自己所描述的那种常用的老鼠夹的单一步骤的"中间体"(intermediates),经由这些更简单的"前体"(precursor)根本不可能"进化"

precursor：先驱

恶意软件事件表征有两种:恶意软件先驱(precursor)和迹象 (indication),所谓先驱是指恶意软件攻击可能会在将来出现. 迹象是指是指已经出现或是正在出现的表征. 确认感染系统的实体地址的难处有几个因素. 在一个管理良好的网络环境中,

precursor：前体物

一般都用mRNA上3个连续核苷序列表示某一野生型菌株因发生基因突变而丧失合成一种或几种生长因子(碱基或氨基酸)的能力,只有从周围环境或培养基中获得这些营养或其前体物(precursor)才能正常生长繁殖的变异类型,称为营养缺陷型.

precursor：前驱物

已有研究显 已有研究显 已有研究显 已有研究显 示心房早期收缩是心房颤动之前驱物 (Precursor) 示心房早期收缩是心房颤动之前驱物 (Precursor) 示心房早期收缩是心房颤动之前驱物 (Precursor) 示心房早期收缩是心房颤动之前驱物

cartilaginous precursor：前[胚胎]软骨(组织)

thermophysical 热物理的 | cartilaginous precursor 前[胚胎]软骨(组织) | undercasing 底箱