Until recently there have been only two well recognized members of the urobilinogen group, mesobilirubinogen, the chromogen of i-urobilin,’ and stercobilinogen, the leuco compound of urobilin or stercobilin. While mesobilirubinogen is readily obtained in crystalline form following amalgam reduction of bilirubin or i-urobilin, stercobilinogen has never been crystallized. Stercobilin, however, wa...

An assay procedure is presented which has proven extremely useful in delineating a subpopulation of schizophrenic patients. The procedure is a highly sensitive rapid screening test for urinary pyrroles such as kryptopyrrole and urobilinogen. An extensive investigation of this test and the original assay procedure for kryptopyrrole described by Irvine indicates that free kryptopyrrole arises pri...

Intravascular haemolysis has been found to result from prolonged endurance competition, rigorous military training and participation in impact sports. Haematological research involving the recreational runner is sparse. Recreational runners frequently vary their training to avoid monotony and improve endurance capacity. This study investigated the haematological effects of a typical day of incr...