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a cell-free extract of yeast, such as was prepared by Eduard and Hans Büchner who observed it to catalyze alcoholic fermentation; this observation essentially eliminated "vitalism" as being responsible for biologic chemical reactions and initiated the beginnings of modern biochemistry (enzymology).
Büchner,Eduard, German chemist and Nobel laureate, 1860-1917.
Büchner extract - a cell-free extract of yeast.
Büchner funnel - a porcelain funnel that contains a perforated porcelain plate on which filter paper can be laid.
Büchner,Hans E.A., German bacteriologist, 1850-1902.
Büchner extract - see under Büchner, Eduard