On expressed yeast-cell plasma (Buchner’s ‘Zymase')

.-In 1897 a communication was published by Professor E. Buchner in which he described a method by means of which he claimed to have isolated for the first time the active alcoholic ferment from the yeast-cell and to have demonstrated its action upon fermentable sugars. Since then Buchner, mainly in conjunction with Rapp, has from time to time given an account of his further investigations in this direction, and these investigations are still in progress. These further investigations, Buchner considers, are confirmatory of e conclusion drawn by him from his original experiments, viz., that e activity of the yeast-cell as an alcoholic ferment depends upon the tion of a soluble enzyme of an albuminoid character elaborated by e living cell. To this soluble ferment Buchner applies the me “Zymase.”