Mario Alberto Pisarev was born in Buenos Aires on March 17, 1941. Present Positions: Head, Dept. of Radiobiology, Argentine Atomic Energy Commission, Professor of Human Biochemistry, Univ. of Buenos Aires Sch. of Medicine; Principal established Investigator from the Arg. Natl. Res. Council (CONICET). Academic Degrees: Physician (1963) and Doctor in Medicine (1974), Univ.Buenos Aires. Licensed for the use of radioisotopes (CNEA, 1964). Previous Positions: Head, Nuclear Biochem.Div., Arg.Atomic Energy Commission (CNEA); Asstnt.Professor of Biochemistry, Univ.Buenos Aires; Visiting Scientist: Yale Univ. Sch of Medicine, Ludwig Maximilan Univ., Munich, NIDDKD (NIH) Bethesda, USA; Visiting Professor Univ. Libre de Bruxelles, Belgium; Res Asstnt Professor of Medicine, State Univ. of New York at Buffalo, USA; Res. Associate, Thyroid Study Unit, The Univ. of Chicago and Clinical Res. Ctr., MIT, USA. Fellow from the CONICET, the NIH, the John S Guggenheim Mem.Fdn. and the H & B Buswell Fdn. Publications: 83 in journals and 9 in books. Prizes and Awards: Arg. Endocrine Society (twice); Arg Fdn on Endocrinology; LATS- Xth Internat Thyroid Congress; Member ICCIDD in Argentina and Venezuela. Referee of articles; Endocrinology, J.Endocrinol. Investig.; Acta Physiol. Pharm. Lat.amer., etc. Scientific Societies: President of: Arg. Endocrine Society and Arg. federat.of Endocrine Societies; Latinamerican Thyroid Society; Vice-President: Arg Society of Biology. Corresponding Member: American and European Thyroid Associations. Founder of LATS. Director of 24 fellowships in Argentina and of 5 approved Doctoral Thesis. Member of Jury for Doctoral Thesis and Professors in Argentina. Member of the Board on Medical Sciences of the Argentine Natl. Res.Council (CONICET); Executive Secretary on Pharmacology, State Secretary on Science & Technology.