Kuhnlein H V, Calloway D H
Am J Clin Nutr. 1977 Jun;30(6):883-6. doi: 10.1093/ajcn/30.6.883.
Mineral elements in dentin from 17th century Hopis were compared with samples from contemporary Hopis living in the same geographic area. Less lead, zinc, and copper, and more strontium were found in the preindustrial teeth. Trace element levels in the contemporary Hopi teeth were similar to those in suburban Californian teeth.
将17世纪霍皮人的牙本质中的矿物质元素与生活在同一地理区域的当代霍皮人的样本进行了比较。在工业化前的牙齿中发现铅、锌和铜含量较低,而锶含量较高。当代霍皮人牙齿中的微量元素水平与加利福尼亚州郊区居民牙齿中的水平相似。