查询词典 precursor

There are neural precursor cells that can divide and proliferate in rat DRG. They can differentiate into neuron and glial cells.

大鼠DRG内存在有分裂增殖的神经前体细胞，这些细胞可以分化为神经元和神经胶质细胞。

The former is to prepare polymolybdates coordinated' directly by organic ligands using Na2MoO4 and MoO3 precursors; The latter plays emphasis on exploiting a simple and effective routine to synthesize Keggin polytungstates in which the transition metal or Si acts as the heteratom by reaction precursor Na2WO4.We have synthesized a 4,4'-bipyridine bridging dumbbell-like polymolybdates a metatungs...

前者主要是制备有机配体键合的多金属钼酸盐；后者重点是探索出一个简易、有效的合成过渡金属或主族元素硅作杂原子的Keggin多金属钨酸盐的方法，然后通过变换过渡金属或有机配体的种类探讨对产物结构的影响，再对所得化合物的结构和组成通过物理测试手段进行表征，同时研究其在光、电、磁等方面的性质。

Moreover, the size of nanorods changes with the concentration of the precursor SnCl4. We also fabricate dysprosium hydroxide by means of the similar method.

我们利用相同的路线制备出了Dy3纳米管，合成过程中，聚乙二醇充当了模板剂，反应在180°C水热条件下完成。

Precursor of the English horn.

一种次高音双簧管；英国管的先驱。

An alto oboe; precursor of the English horn.

一种次高音双簧管；英国管的先驱。

The inactive precursor of trypsin, produced by the pancreas and converted to trypsin in the small intestine by enterokinase.

胰蛋白酶原胰朊酶的惰性前体；由胰制造并由肠激酶在小肠内转化为胰朊酶

Pointed blade, developed in the 16th century and the precursor to the epee.

双刃长剑一一种剑柄精巧，剑刃细长，尖锐，[04：24.11]使用于16世纪，是重剑的前身。

At the end of 1940s, Wright's protégé, James Baldwin, an American black ephebe, advanced an unrelenting criticism of naturalism by Richard Wright, the precursor in African American literary circle.

鲍德温对他在文学创作上的引路人、当时美国黑人文学的代表人物赖特进行了猛烈攻击，这一举动符合布鲁姆所说的文学发展进程中的"弑父"行为。

From the transform infrared spectroscopy and X-ray photoelectron spectroscopy spectra, the hydroxyl and ethoxyl groups of the silica sol drawn from partially hydrolysis and polycondensation between TEOS and MTES can react with PA6 precursor.

红外图谱和X射线光电子能谱分析结果显示，硅溶胶的羟基和未完全水解的烷氧基能够与PA6的前驱体发生杂化反应。X射线衍射结果显示，采用本实验方法制备出的PA6和疏水型PA6/SiO2有机无机杂化材均为α晶型，而DSC结果表明，PA6/SiO2有机无机杂化材料的熔点略高于PA6。

It is the catalyst for converting ethylene to ethylene oxide, the precursor of many organic chemicals.

在将乙烯转化成氧化乙烯的过程中要以银作催化剂。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。