That the amino-acids actually yield the corresponding -ketonic acids when treated with yeast and sugar solution.
The reactions of cellulose certainly indicate that the CO- group is ketonic rather than aldehydic.
It unites with aldehydes to form esters of ketonic acids, and with aniline yields anilido-acetic acid.
Among organic bodies the phenomenon is particularly well marked with the ketonic compounds and others of the same type.
ketone ke·tone (kē'tōn')
Any of a class of organic compounds having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals.