杂环卡宾金属络合物对许多反应有催化作用,它们是一类有潜在应用价值的催化剂。
N-heterocyclic carbene metal complexes have catalytic activities for many organic reactions, and they are a type of catalyst with potential value.
这个理论认为:催化剂的催化作用是电子迁移形式。
Upon this theory the catalytic effect of catalyst is attributed to the electron transfer.
这个理论认为 :催化剂的催化作用是电子迁移形式。
Upon this theory the catalytic effect of catalyst is attributed to the electron transfer.
Enzymes work best, enzymes are proteins that catalyze chemical reactions and our bodies operate by elaborate networks of chemical reactions, When we're off from that temperature then they don't work properly.
举酶这个例子再好不过,酶是一种具有催化作用的蛋白质,人体依靠精密复杂的化学反应网络来运转,如果我们体温与之相差较大,这些酶就不能正常工作
If that protein is an enzyme then you've and you've switched it from an 'off' position where it's not catalyzing a reaction to an 'on' position where it is, you've changed the biochemical state of the cell, you've changed the chemical reactions that can occur within the cell, and you've changed its behavior.
如果这种蛋白是一种酶的话,你就能够将酶从无催化作用的静息态,激活至能催化反应的激活态,你改变了细胞的生化状态,也改变了细胞内发生的化学反应,改变了细胞的行为
It's not as simple as DNA going to RNA going to protein, because proteins need to be present in order to make these things happen as well.
基因表达不是简单的从DNA到RNA,再到蛋白质,因为整个过程需要,不同酶的催化作用
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