【西德《科学概观》1982年第3期第5页报道】细菌和藻类能浓缩一些化学元素。现在西德卡尔斯鲁厄核研究中心的科学家们又发现较发达的有机物也具有这种特性:淡水贝壳能分离和浓缩钚。过去视地衣和苔藓为钚的最有效生物指示剂。它们具有浓缩钚特殊的新陈代谢功能,因此可以用作为钚的“生物分析仪”。现在卡尔斯鲁厄的科学家指出,淡水贝 [West Germany’s “Science Overview”, Issue 3, 1982, p. 5] Bacteria and algae can concentrate certain chemical elements. Scientists at the Nuclear Research Center in Karlsruhe, West Germany, have also discovered that more developed organic matter also has this feature: freshwater shells can separate and concentrate oysters. In the past, lichen and moss were the most effective biological indicators of earthworms. They have special metabolic functions for enrichment and can therefore be used as a “bioanalyzer” for earthworms. Scientists in Karlsruhe now point out that freshwater