三十多年前,有位叫戴姆的科学工作者,在实验室内用肝油、乳酪加淀粉喂养了一批小鸡。不久,这些享受精美饮食的“幸运儿”,却不幸地一个个患了消化道溃疡病。不用怀疑,乳酪和肝油中是不会含有什么损伤消化道的物质的。于是戴姆想:一定是在这类食物中缺少一种为动物所必需的营养物质。他把这种假想中的营养物质,暂称为“抗溃疡因子”。 More than thirty years ago, a scientist named Daim was used to feed a group of chickens using liver oil, cheese and starch in the laboratory. Soon, these “lucky children” who enjoyed fine foods unfortunately suffered from peptic ulcer disease one by one. Do not suspect that cheese and liver oil will not contain any substances that damage the digestive tract. So Dem wondered: It must have been a lack of nutrients that are essential for animals in this kind of food. He temporarily called this hypothetical nutrient substance “anti-ulcer factor.”