据最近外电报道:哈佛大学生理学教授帕本海默(John Pappenheimer)曾用15年探索在人尿中的一种强力但极少量的物质,他在一次医学讨论会上说,此物质的分子很难以分离出,在4.5吨的人尿中只能产生30微克。动物实验显示,微量的此种物质“能直接作用于中枢神经系统,引起过多的睡眠”。只有一克的十亿分之一或再少些就足以使包括灵长类在内的许多种动物,发生几小时的额外睡眠。 According to a recent foreign news report: John Pappenheimer, a professor of physiology at Harvard University who spent 15 years exploring a forceful but very small amount of substance in human urine, said at a medical symposium that the substance’s molecules are Difficult to isolate, producing only 30 micrograms in 4.5 tons of human urine. Animal experiments show that trace amounts of this substance “can act directly on the central nervous system, causing excessive sleep.” Only a gram in the order of a billionth or less is enough for many hours of extra sleep in many species, including primates.