| 词汇 | catalyst |
| 释义 | catalyst noun[ C ] uk /ˈkæt.əl.ɪst/ us /ˈkæt̬.əl.ɪst/ chemistry specialized something that makes a chemical reaction happen more quickly without itself being changed催化剂 an event or person that causes great change: 促成变化的人；引发变化的事件 The high suicide rate acted as a catalyst for change in the prison system.高自杀率促成了监狱系统的改革。 Chemistry - general words acceptor aerosol aerosolize allotrope amphiprotic balanced equation chemical equation electrolyte endocrine disruptor endothermic epitaxial epitaxially epitaxy ionic bond latent heat nonchemical nonelectrolyte nonreactive preatomic reactive You can also find related words, phrases, and synonyms in the topics: Causing things to happen catalyst | American Dictionarycatalyst noun[ C ] us/ˈkæt̬·əl·ɪst/ a condition, event, or person that is the cause of an important change biology, chemistry A catalyst is also a substance that causes or speeds a chemical reaction without itself being changed. catalyst | Business Englishcatalyst noun[ C ] uk /ˈkætəlɪst/us someone or something that causes a big change: the catalyst behind sthThe catalyst behind this welcome trend has been the mighty Bill Gates. catalyst for sthAn outside leader is often needed to serve as a catalyst for change. a catalyst to (do) sthThe Government will act as a catalyst to promote creative collaboration between businesses. Examples of catalystcatalyst Notably, the reaction rates attained by such catalysts are moderate, usually <1 minx1. Here the pitched roof and dark finish appear on one level to be conventional usages but on another as catalysts for new associations. Two of the major catalysts were increasing urbanisation and industrialisation. When the complexity of the organic molecules pool increased, more sophisticated catalysts, including ribozymes and protein enzymes, could be selected. The original catalysts may have been based on clays, various metals, inorganic and organic species that happened to be present and possess some catalytic activity. Peptidyl-prolyl cis-trans isomerases, a superfamily of ubiquitous folding catalysts. They weaken policy regimes, create conditions favorable for change, or act as catalysts for change. The separation of binding from input makes it possible to write agents such as the catalysts mentioned in the introduction. Clays and metal sulphides have been proposed as mineral catalysts that could have promoted the first prebiotic chemical reactions. The adjacent possible is clearly influenced by the environment, which contains chemical partners, energy and the catalysts. They are often used as catalysts in nanotechnology, and may bind polymers like proteins, lipids, and nucleic acids creating assemblies reminiscent of life forms. Processes in chemical evolution must have involved several catalysts multifunctional in nature. Homing endonucleases : structural and functional insight into the catalysts of intron/intein mobility. The results presented in this paper are relevant in both cases, as they refer to the effect of metal ions as catalysts of the condensation of nucleotides. No exogenous oxidation catalysts were added. See all examples of catalyst These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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