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- Ligand 3b gave higher enantioselectivity (up to 96% ee) and chemical yield. 在配体3b催化的苯乙炔对醛的不对称加成反应中,产物的ee达到96%25。
- The results demon-strate that the decontamination effect for main reaction products, specially radioactive Ba isotopes, is satisfactory. The chemical yield of Ra is more than 70%. 实验结果表明,该流程对主要反应产物,特别是Ba的去污较好,Ra的产额可达70%25以上。
- counts corrected for chemical yield (CCY) [化] 化学产额校正计数
- In the optimized condition, the reaction of diethylzinc with arylaldehydes gave the corresponding alcohols in 100% chemical yields and up to 84% ee. 最好的化学收率和对映选择性分别高达100%25不11 84%25ee。
- By using GIS and RS,SWAT was developed to predict the impact of land management practices on water,sediment and agricultural chemical yields in large complex watersheds with varying soils,land use and management conditions in the long-term. 它能够利用gis和RS提供的空间数据信息,模拟复杂大流域中多种不同的水文物理过程,包括水、沙、化学物质和杀虫剂的输移与转化过程。
- A reactor is a container for chemical reaction. 反应器是进行化学反应的容器。
- The chemical symbol for copper is "Cu". 铜的化学符号是Cu。
- We are doing a chemical experiment. 我们正在做化学实验。
- My major is the subject of chemical engineering. 我的专业是化学工程学。
- Ammonia is a chemical substance. 氨是种化学物质。
- A chemical derived from petroleum or natural gas. 石油化学制品从石油或天然气中提炼出的化学产品
- Beware how you handle the toxic chemical. 小心处理有毒的化学药品。
- The chemical can behave as an acid. 这种化学制品能起酸的作用。
- Some chemical compounds can be resolved by heat. 一些化学化合物可以通过加热分解。
- I am not familiar with chemical terms. 我不熟悉化学术语。
- He devoted his life to chemical research. 他一生从事化学研究。
- He is experimenting with a new chemical. 他正在实验一种新的化学制品。
- The two elements are synthesized by a chemical process. 这两种元素已经化学合成。
- A chemical compound consisting of such molecules. 二聚化合物这种聚合物形成化合物
- Relating to both physical and chemical properties. 物理和化学的与物理和化学特性均有关的
