查询词典 precursors

The Organovo machine uses stem cells extracted from adult bone marrow and fat as the precursors.

欧加南墨的机器，采用从人体骨随萃取出来的干细胞以及脂肪，做为前驱细胞。

When oxygen is present in cells, polyphenol oxidase enzymes in the chloroplasts rapidly oxidize phenolic compounds naturally present in the apple tissues to o-quinones, colorless precursors to brown-colored secondary products.

当氧存在于苹果组织的细胞中时，叶绿体（含有叶绿素和进行光合作用的地方）中的多酚氧化酶，会迅速地将天然存在于苹果组织中的酚类化合物氧化为邻醌。

Shenzhen high-wing Technology Co., Ltd. is mainly engaged in three-color phosphors and LED decorative lighting products and sales. 1992 high-wing technology trichromatic phosphors begin mass production, the company trichromatic phosphors in the domestic production industry, the first in the use of nitrogen, hydrogen precursors to protect the production of ultra-high-temperature tunnel furnace trichromatic green powder and blue powder, the first technology would be Jet Milling for phosphor production, enhance production of the first color phosphor of bimodal powder blue. High-wing technology in 2004 began producing LED lighting products have been developed, including LED string lights, cup lights, bubble lights, tube lights, LED lights×, LED signs, lights, cast ray lamp, underwater lamp, rainbow tubes and LED flashlight series of applications and achieve bulk export the European Union, the United States, Australia, Africa, Asia and other countries, in the domestic market has volume applications.

深圳市企荣科技有限公司主要从事三基色荧光粉和LED装饰、照明制品的生产和销售。1992年企荣科技开始批量生产三基色荧光粉，公司在国内三基色荧光粉生产行业中最先使用氮、氢气体保护超高温隧道炉生产三基色绿粉和蓝粉，最先将气流粉碎技术用于荧光粉的生产，最先生产出提高荧光粉显色性的双峰蓝粉。2004年企荣科技开始生产照明光源LED的相关产品，现已自主研发了包括LED串灯、杯灯、泡灯、管灯、LED字灯、LED指示牌灯、投光灯、水底灯、彩虹管及LED手电筒等系列应用产品，并已实现批量出口欧盟、美国、澳洲、非洲、亚洲等国家，在国内市场已经批量应用。

The results show that LSCF and LSM precursors can be transformed to the pure orthorhombic perovskite structure having been calcined at 900℃ and 1200℃ for 5 h, respectively, and LSCF cathode has a smaller particle size and a bigger specific surface area compared with LSM cathode.

采用氨水沉淀法分别制备La0.6Sr0.4Co0.2Fe0.8O(下标 3-δ)与La0.8Sr0.2MnO(下标 3-δ)两种阴极材料，并用X射线衍射、场发射扫描电子显微镜和比表面积对所制备材料的结构、晶粒大小、形貌及比表面积进行表征。

In these experiments, we have choosen the activated carbon as the support, and copper nitrate, copper acetate and copper sulfate were used as precursors to prepare the supported activated carbon-copper catalysts. Toluene was chosen as pollutant for activity test.

本实验选择活性碳当担体，而前驱物为硝酸铜、醋酸铜、硫酸铜制备金属活性相为铜之触媒，并假设目标污染物为甲苯来进行实验探讨。

A new convenient synthesis of a series of 1-aryl-2-propanones using aromatic amine s as precursors, via diazo reaction and improved Meerwein arylation reaction under mild conditions, was achieved.

以芳香胺为原料，经重氮化和改进的Meerwein芳基取代反应，合成了一系列的1-芳基-2-丙酮，其中1-(3，5-二三氟甲基苯基)-2-丙酮是一个新化合物。

A new convenient synthesis of a series of 1-aryl-2-propanones using aromatic amines as precursors, via diazo reaction and improved Meerwein arylation reaction under mild conditions, was achieved. In addition, 1-[3,5-bisphenyl]-2-propanone is a new compound among the synthesized compounds. This approach is an efficient synthetic method for the aryl-propanones with the different substituting groups.

以芳香胺为原料，经重氮化和改进的Meerwein芳基取代反应，合成了一系列的1-芳基－2-丙酮，其中1-（3，5-二三氟甲基苯基）2-丙酮是一个新化合物改进后的方法简化了合成步骤，提高了收率，可方便地用于在苯环上具有不同取代基的芳基丙酮的合成。

A New type of benzoxzine precursors was systhesized based on methoxy methylene diphenyl ether oligomer.The struture of product was characterized by IR and H-NMR analysis and effects of solvent polarity,temperature on the precursor composition were investigated.

以甲氧基次甲基二苯醚低聚物为基础合成了苯并口恶嗪预聚物，用H－NMR、IR表征了该预聚物的结构，讨论了反应温度、溶剂的极性等因素对合成预聚物的结构和组成的影响。

The fuel-injected '57 Bonneville, the wide-track '59 Pontiacs, and the handsome '63 Grand Prix were just precursors to the GTO, which arrived in 1964 (under chief engineer and later division manager John De Lorean).

燃料注入'57巴纳维亚，宽轨'59车，和漂亮的'63大奖赛只是前体的可关断晶闸管，抵达1964年（根据首席工程师，后来部门经理约翰者Lorean ）。

These applied sulfur sources may be the precursors of biogenic sulfur gases emitted from soils.

这些添加的硫源是土壤释放的含硫化合物的前体。

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。