Photogravure after a photograph. Buchner (1860-1917) studied under Naegeli and Baeyer, becoming the latter's asistant. It was originally believed that fermentation required intact living yeast cells, but Buchner's research showed that the cells did not have to be intact or 'vital', and he named the active principle zymase. We now know it as one of the enzymes, proteins which are involved in nearly all biochemical changes. Buchner won the Nobel Prize for chemistry in 1907 and was killed in action serving in a field hospital in the First World War. From a collection of portraits of scientists published by Photographische Gesellschaft, Berlin, 1910. Dimensions: 460mm x 340mm.
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