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空气、水和阳光并列为维持地球上生命所必需的三大要素,而空气中与生命过程直接相关的组分就是氧气,没有氧气的地方,也就没有生命(厌氧微生物除外)。正常情况下,人每分钟约吸入氧气250毫升,而其中约32％即约80毫升用来维持大脑的正常活动。一旦大脑缺氧,就会感到头晕、恶心、乃至窒息死亡。人们通常只知道氧气对生命的意义,并不了解氧气对于疾病和衰老同样也起着重要的作用,而后者正是近30年来化学与生物化学研究的热点。 时光倒退到35亿年前,地球上并没有氧气,而到处充斥着硫化氢等气体,后者提供了当时地球上的
Air, water, and sunlight rank among the three essential elements necessary to sustain life on Earth, and the components of the air that are directly related to the life process are oxygen, where there is no oxygen (no anaerobic microorganisms). Normally, a person inhales about 250 ml of oxygen per minute, and about 32% of them, about 80 ml, are used to maintain normal brain activity. Once the brain hypoxia, you will feel dizzy, nausea, and even suffocation. People usually only know the meaning of oxygen on life, and do not understand that oxygen also plays an important role in diseases and aging. The latter is the hot spot in the field of chemistry and biochemistry in the past 30 years. Back in time to 3.5 billion years ago, there was no oxygen on the earth and there was a lot of gas, such as hydrogen sulphide, which provided the then