I can take an insulated box, and I can have a chemical reaction in that insulated box.
里面进行着化学反应,比如说把一个药店。
To ask questions like how much heat is released in a chemical reaction that takes place at constant temperature.
当我们想要知道,当一个化学反应在恒定的温度下发生时,会放出多少热量时。
Hess' Law states that for any chemical reaction, the energy change is path independent.
盖斯定律表明,对于任意化学反应,能量变化并非是路径依赖的。
So, then we go to thermodynamics and chemical equilibrium, and this is really about chemical reactions -- weather a reaction will go, will it be spontaneous, if there an equilibrium, what direction will the reaction be shifted in.
然后我们要讲到热力学和化学平衡,这都和化学反应有关,一个反应是否能发生,是不是能自发反应,如果存在化学平衡,它会朝什么方向移动。
Generally, there are a couple of elements that one might set down as in a Petri dish, and wait to see if some chemical reaction might take place, but not at all sure of what it might be.
一般来说,都有几个元素,作者会把它们像放入培养基中一样培养,等待某种化学反应的产生,但对可能的结果却一无所知。
So, a protein that has tyrosine and it has tyrosine in a position such that it's on the outside of the protein and accessible to chemical reaction can be phosphorylated.
所以,一种蛋白质中含有酪氨酸,并且该酪氨酸位于,像蛋白质的外侧这样的位置,这样才能够发生磷酸化反应
What is it when you run a chemical reaction under ordinary circumstances, what's constant?
如果你在通常的环境下进行化学实验,那么这些条件是什么?什么保持常数?
So, how would we describe a chemical reaction?
我们如何描述一个化学反应?
Some proteins can be switched from an 'off' position where they don't do anything to an 'on' position where they now do something by only a chemical reaction like this where a phosphorous is added.
一些蛋白质可以从关闭状态的,无所作为,到成为开启状态后,执行某种功能,中间只发生了一个引入磷酸基的化学反应
It performs a chemical reaction on the protein, taking a phosphorous from ATP and moving that phosphorous onto the protein.
它能够催化蛋白参与如下反应,即将ATP上的一个磷酸基团,转移到蛋白质上
It's not a chemical reaction.
它不是化学反应。
Restriction enzymes are just a kind of enzyme, enzymes are protein molecules that make a chemical reaction go faster, and the chemical reaction that restriction enzymes do is cutting DNA.
限制性内切酶是一种酶,而酶是加速化学反应的蛋白质分子,限制性内切酶加速的化学反应,是切割DNA
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