John Jacob Abel to successfully isolate the neutral base of epinephrine by adding ammonium to highly concentrated extract, a method Abel himself tried but failed due to the use of low concentration of extract. After Takamine's success, Abel himself remarked, with great candor, "The efforts of years on my part in this once mysterious field of suprarenal, medullary biochemistry, marred by blunders as they were, eventuated, then, in the isolation of the hormone not in the form of the free base but in that of its monobenzoyl derivative." Together with L.G. Rowntree and B.B. Turner, Abel devised what they called a "vividiffusion" apparatus,
S. John Jacob S. John Jacob S. John Jacob (born 19 May 1953) is an Indian politician and was a Member of the Legislative Assembly (MLA) in Tamil Nadu. Jacob was born on 19 May 1953 in Paduvoor and died on 13 Feb 2018. He is married and has two children. Jacob was elected to the Tamil Nadu Legislative Assembly as an Indian National Congress (INC) candidate from Killiyur constituency in Kanyakumari district in the 2006 election. He was one of 14 MLAs who had a 100 per cent attendance record in the 13th Tamil Nadu Legislative Assembly. Jacob was re-elected from Killiyur