Much–Holzmann reaction
The Much–Holzmann reaction was an early attempt at a serological test for the diagnosis of dementia praecox, a psychiatric condition from the early twentieth century that has since been replaced by the term schizophrenia. The originators of this test, Much and Holzmann of Eppendorf, posited that sera from patients with dementia praecox protected red blood cells from hemolysis caused by cobra venom