查询词典 precursor

Nonspecific cytotoxic cell is the evolutionary precursor of mammalian natural killer cell in teleostean fish, which was mainly separated from blood and lymphoid organ as the first barrier of defense to protect the animal against bacteria, virus and protozoa parasitism, it plays an important role in nonspecific immunity and also has a function of killing tumor cells in vitro.

自然杀伤细胞进化上的前体细胞在鱼类中被称作非特异性细胞毒性细胞，主要来源于血液和淋巴器官，是防御细菌、病毒、寄生性原生动物等入侵的第一道防线，在非特异性免疫中起重要作用，还具有体外杀伤肿瘤细胞的功能。

The thickness of silica shell could be controlled by changing the concentration of precursor TEOS.

电镜观察表明二氧化硅壳层的存在有效地抑制了高温下Co_3O_4纳米晶的生长。

In this study, SiO〓 particles with nanometer sizes were synthesized by solgel processes with TEOS as precursor.

本工作以正硅酸乙酯为前驱体，用sol-gel方法制备了纳米级SiO〓微颗粒，研究了不同sol-gel条件对SiO〓凝胶颗粒形成特性的影响和机制。

The hydrolysis rate constant of TEOS in mixed systems was larger compared with TEOS in single precursor systems.

与单前驱体水解一致的是，在双前驱体系中TEOS和DDS自身的反应级数仍保持一级，但是氨和水的反应级数都有不同程度的增大。

Objective: To study effect of Laurate alcohol ester phenylacetate as precursor on thallus itself and fermentation unit in penicillin fermentation process.

目的：研究苯乙酸月桂醇酯作为前体对青霉素发酵过程中菌体本身和发酵单位的影响。

Thickening of arterial walls is a precursor to plaque buildup, which can lead to heart attacks and strokes.

动脉壁的肥厚是斑块形成的前兆，而动脉斑块可以导致心脏病和中风的发作。

The selective precursor may include a thiol termination, the first material may include gold, and the second material may include silicon.

该选择性的前体可以包括硫醇封端，该第一材料可以包括金，该第二材料可以包括硅。

Thiophene, a highly common substance, serves as a versatile precursor to a variety of amino acids.

噻吩是一种很普通的物质，它可以作为合成各种氨基酸的母体。

Thioridazine ; cognitive function ;β-amyloid ;β-amyloid precursor protein ; Alzheimers disease

甲硫哒嗪；认知功能；β-淀粉样蛋白；β-淀粉样前体蛋白；阿尔采末病

We can learn from Thomas Edison that a series of apparent failures is really a precursor to success.

我们能获悉从Thomas Edison，一系列的明显的失败真正地是前体对成功。

Bob Eckert has been chairman and chief executive of Mattel for eight years.

美泰董事长兼首席执行官鲍勃·埃克尔特在任已8年。

The outlook for honors and disgraces carries on and surpasses the traditional outlook for honors and disgraces theoretically, and carries on and develops the theory of construction of socialist mora...

社会主义荣辱观的提出在理论上是对传统荣辱观的一次继承和超越，是对社会主义道德建设理论的继承和发展，在实践上有利于形成良好的社会风尚。