Sentences with phrase «with radioactive tracers»

A pioneer carbon cycle diagram, remarking that «a quantitative statement is rarely attempted,» was Hutchinson (1948), pp. 222 - 23; the idea may have been drawn from «compartment» models of biological systems familiar in the 1940s to people who worked with radioactive tracers, see Atkins (1969).

In the 1980s, positron emission tomography (PET) scans, which detect neural metabolism with radioactive tracers, snapped the first pictures of the brain in midthought.

A patient is injected with a radioactive tracer, and the cells that absorb it most readily glow bright.

Not exact matches

They developed a radioactive tracer that, when injected into the body, binds with a key protein that is present in all synapses across the brain.

I've always thought our exposure to chemicals was nowhere comparable to that of a radiologist, for example, who deals with x-rays and radioactive tracers 10 hours a day.

By using dual radioactive tracers with differing lifetimes, Wilson et al. [2017] found short term increases in CH4 and CO2 release during periods of thaw in a discontinuous permafrost were generally offset by long - term accumulation of peat in the ensuing millennia, leading the regions to continue to be net carbon sinks with negative atmospheric radiative forcing, given the long life - time of atmospheric CO2.