查询词典 precursors

Human erythropoietin receptor plays an important role in regulating the red blood cell production by promoting the proliferation and differentiation of RBC from erythroid precursors.

以人胎肝为材料，通过RT PCR的方法扩增出人促红细胞生成素受体的胞外区基因。

The fluoroalkylsilane film was synthesized by using trimethylchlorosilane, fluosilicic acid and water as the precursors.

采用溶胶-凝胶法，以三甲基氯硅烷、氢氟硅酸和水为先驱体，在玻璃基片上用提拉法制备出一种含有-CF3强疏水性基团的氟硅烷薄膜。

Both star copolymer precursors are hydrolyzed in the acidic conditions, then the corresponding recovered star copolymers of EO and glycidol with multi pending hydroxylmethyls are esterified with 2-bromoisobutyryl bromide to produce the ATRP macroinitiators with multi pending bromoisobutyryl groups . Then the latters initiate the polymerization of styrene to form the corresponding amphiphilic three- and four-arm star PEO-g-PS.

在阴离子共聚EPEE单体和环氧乙烷单体的过程中，通过变换引发剂体系中的醇的结构(由原来的二元醇变成多元醇，如三羟甲基丙烷和季戊四醇)，合成了星形结构的共聚物，通过水解反应脱去保护基团后，再与2-溴异丁酰溴反应，得到链的侧端挂有很多2-溴异丁酸酯基的星形大分子引发剂，通过ATRP聚合机理引发苯乙烯聚合得到PEO为主链，PS为侧链的星形一接枝共聚物。

One way to increase the heterologous production is to increase the pool of precursors in the host.

这种异种生产是依赖于高效表达系统，为类胡萝卜素的基因簇，但增加的供应量前体在宿主生物体，是具有重要意义的。

Serotonin (5-HT), its precursors tryptophan and 5-hydroxytryptophan (5-HTP), major metabolites 5-hydroxyindoleacetic acid (5-HIAA); and 3-methoxy-4- hydroxyphenylethylene glycol , homovanillic acid , the respective major metabolites of noradrenaline and dopamine were measured by a method of HPLC.

应用高效液相色谱法测定其中5—羟色胺（5-HT）系列代谢物：色氨酸、5-羟色胺酸（5-HTP）、5-HT、5-羟吲哚乙酸（5-HIAA）；多巴胺的主要代谢产物3-甲氧基-4-羟基苯乙酸；去甲肾上腺素的主要代谢产物3-甲氧基-4-羟基苯乙二醇等。

The moderate hypotrophic phenotype of lungs from animals bearing a Hes1 mutation, and the expression of Notch components in the distal lung bud during branching morphogenesis, together suggest that Notch may play a role in normal lung growth, especially in Clara cell precursors.

动物发生温和性肺营养缺陷表型时，Hes1发生突变，且在肺分支成形过程中，Notch在末梢肺芽中表达。这都说明：Notch对肺的正常生长起到一定作用，特别是在Clara细胞前体中。

EPO was considered to be excreted only by the kidney and responsible for the proliferation,maturation,and differentiation of the precursors of the erythroid cell line incretory hormone.

EPO以往一直被认为仅在肾脏分泌，是一种作用于骨髓造血细胞，促进红系祖细胞增生、分化、最终成熟的内分泌激素。

EPO was considered to be excreted only by the kidney and responsible for the proliferation, maturation, and differentiation of the precursors of the erythroid cell line incretory hormone.

在大鼠脑损伤模型中，EPO对抗损伤后炎症反应，并起到神经保护作用；在实验性自身免疫性脑脊髓炎大鼠模型和大鼠大脑中动脉梗塞模型的研究中发现，EPO可明显抑制促炎性细胞因子和趋化因子的产生，进而减轻炎症反应。

The effect of the itaconic acid content in copolymers on the structure and properties of PAN precursors was investigated.

通过元素分析、IR、DSC、13C-NMR等手段，讨论了共聚单体IA对共聚反应及聚丙烯原丝结构和性能的影响。

Hybrid mesoporous molecular sieve materials with hexagonal mesoporous structure and covalent bonded polyoxometalates were synthesized based on tetraethoxysilane anti lacunary polyoxometalate, SiW11, via sol-gel method in the presence of triblock copolymers P123 as the structure-directing agent. The influences of molar ratio of inorganic precursors and aging temperature on the structure and the loadings of SiW11 in the hybrid materials were investigated. Some reaction details in the synthesis were revealed.

用嵌段共聚物P123为模板剂，正硅酸乙酯和缺位结构的多金属氧酸盐SiW11为无机前驱体，由溶胶－凝胶法合成了具有六方结构和SiW11共价键联的介孔分子筛杂化材料SiW11/SBA-15，着重考察了无机前驱的配比和老化温度对杂化材料结构及SiW11负载量的影响。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。