- Méfgn<— auG 12 1988 { PECHNIQUES AND STUDIES IN THE USE OF IODINE 131 Dr, aobert Fink, Research Blochemist, Birminge hem VoAe Hospital and Associate Clinical Pro=fessor of Physiclogical Chemistry, School of Medicine, University of California at Los Angele: (Abstract of a lect eture celivere@? in s University Extension Course at U.C.L.A. on “The Application of Nuclear Physics to the Biological and Mede= {eal Sciences") The metaboliem of iocine has research duri subject of a large amount of two Gecades since the thyroid gland wag shown to cone very marxel degree as ccnopared with cther tissues. racioactive iodine became sgo and mace it possible under noriral cone acel rannins toe Le Learmsd abtut the blicod etresm Ens baés ts mwas nots the thyrcie ecptures Lodine from and converts it into Cong Pi tha thyrai@ bernone whieh controls Ge 2 Same recently devciored chromatovrdphic tschmicvgs show promise of being the tocis reculped for the {ob cv Pillins in mush of the miesing information esout this process and perhaps many others eas woll. For ex- tracer tecinmiques have hsen used in conjunction with filter paver shromntography, a vracedure in which a tiny greplet of body pe flui ¢@ or tissue extract placed tS inci vicusi - — chemical on a sheet of filter paner is split into «Ymponents> by a ifcquit wrien creeps down the paper and carries the echsmical substances prasent in the cririnal droplet along at different rates. then eiven a chromate Spraying the paper with « suitcble cclor reagent m showing colsrec spots eccrrespending to the posi- tion texon by the shemical substances present in the droplet in relatively high concentration. If radioactive substances are present, nowever, pre=