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,
Abel Herzberg by "Trouw" and the discussion center "De Rode Hoed" in Amsterdam) commemorates Herzberg and his legacy of Jewish humanism. Herzberg published plays, essays, a diary, historical writing, and novellas. His collected works were published in four volumes between 1993 and 1996. Abel Herzberg Abel Jacob Herzberg (17 September 1893 – 19 May 1989) was a Dutch Jewish lawyer and writer, whose parents were Russian Jews who had come to the Netherlands from Lithuania. Herzberg was trained as a lawyer and began a legal practice in Amsterdam, and became known as a legal scholar also. He was a Zionist from an