人不能长时间呼吸纯氧, 为什么呢?人体各组织均不能承受过多的氧.这是因为氧本身在不需要酶催化的情况下就能与不饱和脂肪酸反应,并能破坏贮存这些酸的磷脂.而磷脂又是构成细胞生物膜的主要成分.从而最终造成细胞死亡. 这个过程叫做脂质过氧化。此外,氧对细胞的破坏还在于它可产生自由基.诱发癌症。实验证明,毁灭细胞培养物的办法就是将它置于过饱和氧的环境中。 People can’t breathe pure oxygen for a long time. Why? Tissues in the human body cannot tolerate too much oxygen. This is because oxygen itself can react with unsaturated fatty acids without requiring enzyme catalysis, and can destroy the storage of these acids. Phospholipids. Phospholipids, in turn, constitute the main component of cellular biofilms, and ultimately cause cell death. This process is called lipid peroxidation. In addition, oxygen destroys cells because it produces free radicals and induces cancer. Experiments have shown that destroying cell cultures is done by placing it in an environment of supersaturated oxygen.