(1) In 1934 he used a radioisotope of phosphorus to study how human tissue absorbs phosphate.(2) The radioactive tracer evaluated for this study, known by the brand name Zemiva, links a fatty acid to a radioisotope which is injected in the patient.(3) In essence, the process involves binding a radioisotope to a compound that has a specific affinity for an organ or region of the body.(4) I noticed some important omissions, and would like to point out that the field of radioisotopic dating is far more advanced than his article suggests.(5) Presently, the Triassic in general and the Late Triassic, in particular, have very few reliable radioisotopic dates.(6) Synthesis of the heavier transuranic elements, as well as of radioisotopes of the natural elements, is sometimes included under the broader umbrella of chemical synthesis.(7) In cardiology, perfusion to cardiac tissue can be studied using radioisotopes such as N13 ammonia.(8) The variables studied include demographics, symptoms, roentgenographic patterns, pulmonary function tests, exercise physiology, radioisotopic lung scans, and cellular and biochemical BAL profiles.(9) We can determine the absolute age of some rock strata, if we are fortunate and the rock contains right kind of mineral deposits to get a good fix in time using radioisotopic methods.(10) Healthy elderly volunteers were infused with normal saline either intravenously or subcutaneously, using radioisotopic triated water and technetium pertechnetate.
