Why do people become older and older? — free radical
Why do people become older and older? — free radical
Why do people become older and older? — free radical
Why do people become older and older? — free radical
[Ans]
free radical
Why so many scientists consider that free radical is harmful to people?
Answer and history of it will be written at bottom.
Let’s start with a few words.
1.free radical
[intro]
Many scientists considers that free radical can make human be older.
2.BHT
[structure]
((CH3)3C)2C6H2CH3OH
[intro]
It can be used as preservatives because it can neutralize and kill free radical.
3.SOD (superoxide dismutase)
[intro]
It is a kind of ezyme. It only can kill free radical.
4.ESR(Electron spin resonance)
[intro]
哈曼 doctor says that BHT can neutralize and kill free radical, so he put BHT into fodder and he found that the life of rats are longer.
[history]
I feel very sorry that I don’t know his or her english name.
In 1950y, 哈曼 doctor takes experiement how the radiation affects of rats. He says that BHT can neutralize and kill free radical, so he put BHT into fodder and he found that the life of rats are longer. However, most scientists have a doubt with it.
But in 1969, someone found there exists SOD in most animals.
Do you remember that we mentioned about SOD.
Suppose that free radical is not harmful, why there exists SOD in most animals.
ESR
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