INVESTIGATIONS ON THE GLYOXYLIC ACID REACTIONS ON URINES FROM SCHIZOPHRENICS AND OTHER PSYCHOTIC PATIENTS

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Abstract
The glyoxylic acid test with urines of psychotic patients gave positive reactions with the majority of the 65 schizophrenics, negative reactions with the majority of the 67 non-schizophrenics, including 12 normal adults. The factors responsible for the test reactions are briefly discussed and related to the presence in the urine of a substance with an indole nucleus, other than indole, possibly tryptophan or its metabolites.