| 单词 | radioactive tracer |
| 释义 | > as lemmasradioactive tracer radioactive tracer n. Biology and Medicine a radionuclide or radioactively labelled substance used as a tracer (tracer n.1 2c). ΚΠ 1940 Biol. Bull. 79 342 (title) The use of radioactive tracers in the determination of irreciprocal permeability of biological membranes. 1960 K. Esau Anat. Seed Plants xiv. 182 Studies involving use of radioactive tracers support this concept of a quiescent center. 2002 Time 17 July 81/4 Italian researchers have tracked the rate at which a radioactive tracer ‘washes out’ of patients' tumors, and found that those with low wash-out rates respond better to chemo. < as lemmas |
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