Group 12 element people in the 17th century. German chemist Andreas Marggraf is usually given credit for discovering pure metallic zinc in a 1746 experiment by heating a mixture of calamine and charcoal in a closed vessel without copper to obtain a metal. Experiments on frogs by the Italian doctor Luigi Galvani in 1780 with brass paved the way for the discovery of electrical batteries, galvanization and cathodic protection. In 1880, Galvani's friend, Alessandro Volta, invented the Voltaic pile. The biological importance of zinc was not discovered until 1940 when carbonic anhydrase, an enzyme that scrubs carbon dioxide from blood, was shown to
Ore Mountain cuisine of potato are also common, the best-known is the so-called "Rauchemaad". At Christmas, which is especially richly celebrated in the Ore Mountains, many households still make "Neinerlaa". The ingredients vary from region to region, sometimes even from village to village. In any case, on Christmas Eve nine elements are served, for example, bratwurst, sauerkraut and lentils, each element supposedly having a special significance for the coming year. For example, dumplings stand for wealth and celery for fertility Ore Mountain cuisine Cuisine in the Ore Mountains was dominated for centuries by the changing economic circumstances of the mining, handicraft and forestry