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,
John Jacob Lavranos John Jacob Lavranos John Jacob Lavranos (29 March 1926 Corfu - 1 February 2018 Portugal) was a Greek/South African insurance broker and botanist, with a special interest in succulents. John's mother, Lily, was half Swiss/German, and lived for most of her married life in the family house in Chlomos in Corfu. She and her husband Philip cared for John and his younger brother, Max, saw the occupation of Corfu during WWII, and lived through the bombings by Italians, Germans, British and Americans, only to be plunged immediately into the Greek Civil War of 1946 to 1949. At the end of