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生命过程中,蛋白质起着决定性的作用,而蛋白质中含有动植物都不可缺少的氮元素。尽管大气中含有80%的氮气,但它不能被绝大多数的生物直接利用。科学家们最近在非洲的新几内亚山区调查研究中发现:那里的一些人饮食十分简单,每天仅吃一点蔬菜和山芋,最多加一点豆类及花生。每人每天所摄取的蛋白质仅22克,只有世界卫生组织规定的最低标准的1/3。但是,那里的人们却十分健康强壮。经过研
Protein plays a decisive role in the process of life, and the protein contains nitrogen, which is indispensable to animals and plants. Although the atmosphere contains 80% nitrogen, it can not be directly used by most organisms. In a recent survey of mountainous areas in New Guinea in Africa, scientists found that some people there had a very simple diet, eating only a little vegetables and sweet potato every day, and adding a maximum of beans and peanuts. The protein intake per person per day is only 22 grams, only one third of the minimum standards set by the World Health Organization. However, the people there are very healthy and strong. After research