查询词典 precursors

Yet after extensive injuries that deplete resident neuronal precursors, HBCs transiently proliferate and their progeny fully reconstitute the neuroepithelium.

然而当广泛的伤害耗尽固有的神经元的前体后，HBCs迅速地增殖，其子代细胞充分地重新组成神经上皮。

In the calcination of precursors, there is always a certain amount of Mg-rich magnesium niobate, i.

分析表明，在前驱体的煅烧反应过程中，总是有一定量的相对富Mg的Mg〓Nb〓0〓作为主相MgNb〓O〓的伴生产物而出现。

Part 2. Expressions of Involved Genes and Apoptosis in Osteoclastic Precursors

第二部分磨损颗粒对破骨细胞前体细胞相关基因表达及凋亡影响。

The main contents are as follows: A series of MCM-41-supported nickel phosphide catalysts with initial Ni/P atomic ratio of 0.5 - 2 and loading level of 10 - 40 wt % in the oxidic precursors were prepared by an in-situ reduction method. Their catalytic performances were evaluated in the HDN of quinoline.

论文内容主要包括：用原位还原的方法制备了MCM-41负载的磷化镍催化剂，考察了不同Ni／P摩尔比和负载量对催化剂结构和喹啉HDN反应活性的影响。

Study on the preparation of γ-alumina-supported molybdenum phosphide hydrofining catalysts;2. Silica-supported molybdenum phosphide s were prepared in a fixed bed reactor by an in situ reduction method from their oxidic precursors.

以SiO2为载体，用钼酸铵和磷酸氢二铵作钼源和磷源，采用共浸渍法制备了负载型磷化钼氧化态前体；在固定床反应器上，用H2原位还原制备了MoP/SiO2催化剂。

He catalyst precursors,WO3/TiO2-Al2O3,with different WO3 content were prepared at 500 ℃ baking for 5 h after loading ammonium paratungstate.

iO2具有独特的物理化学性能，在材料科学和光催化领域中具有重要的地位，在环境友好化学中含Ti催化剂的研究与开发已引起了人们的广泛重视。

Our results indicate that biosynthesis of UDP-sugars that are precursors of pectic polymers is important for cotton fiber elongation.

综合分析表明，果胶前体核苷糖的生物合成对棉纤维细伸长非常重要，并且受乙烯信号的调控。

A chemical vapor depositionmethod for depositing high quality conformal tantalum/tantalum nitridebilayer films from inorganic tantalum pentahalide(TaX5)precursors and nitrogen is described.

描述了一种从无机五卤化钽(TaX 5 )前体和氮气中沉积形成高质量的保形钽/钽氮化物双层膜的化学气相沉积法。

The precursors of mast cell degranulating peptide genes were amplified by RT PCR from the total RNA of venom gland of two honeybee species, Apis mellifera ligustica,Apis cerana cerana ,and three wasp species, Vespa magnifica,Vespa velutina nigrothorax and Polistes hebraeus ,respectively.

从中华蜜蜂、意大利蜜蜂、大胡蜂、墨胸胡蜂和亚非马蜂 5种雌成蜂毒腺中快速抽提总RNA ，用RT PCR方法分别扩增各得到大小约为 35 0bp的cDNA片段，进一步将这 5个片段克隆入pGEM T easy载体，进行测序和序列分析。

The mature egg cell was an inactive cell with only a few polysomes. At the early zygote stage, a large number of ribosomal precursors were produced by the nucleolus, and many polysomes appeared in the cytoplasm, which suggests a high level of metabolism. Zygote at the dormancy stage had a small nucleolus and marked decrease in ribosomes, as shown by a few polysomes, which suggests decreased metabolism. Zygotes in the prophase of mitosis and two-celled proembryo became active again in metabolism, for a prominent nucleolus, high density of ribosomes and increased number of polysomes in the cytoplasm.

结果如下：在成熟卵细胞中多聚核糖体数量不多，且细胞代谢活性较弱；初期合子内，核仁大量合成核糖体前体物质，胞质中多聚核糖体数目众多，细胞代谢活性较强；休眠期合子的核仁变小，胞质中核糖体数量急剧减少，仅有少量多聚核糖体，细胞代谢活性较弱；合子分裂前期和二细胞原胚期，核仁显著，胞质中核糖体的密度增加，出现大量多聚核糖体，细胞代谢活性较强。

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。