Sentences with phrase «of radioactive tracers»

Measuring the activity of transporter proteins in a living organism has been a challenge for scientists, because the methods are difficult, often require the use of radioactive tracers, and are hard to use in intact tissues and organs.

Some supporters of alternative life suggest looking for signs of metabolic activity in varnishes, which could be detected by watching for the flow of radioactive tracers through any hidden organisms.

However, the authors suggest that increasing the size of the detectors or the amount of radioactive tracer could help to overcome these issues, and propose that their technique could be useful for the study of both biological and non-biological systems.

The amount of radioactive tracer will be the determining factor: If you have a high uptake of iodine tracer, it means that you have Graves» disease.

Not exact matches

Using a small amount of a radioactive substance as a tracer, the scientists focused on the brain's mu - opioid system in which chemicals called endogenous opioids bind to receptors and hinder the spread of pain messages in the brain.

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

«We're responsible for producing radio tracers: radioactive drugs that we use to study the imitation, onset and progression of disease in people,» Schaffer says in a teaser video previewing his lecture.

«These include different types of MRI scans, which use strong magnetic fields and radio waves to produce detailed images of the inside of the brain, and Positron Emission Tomography (PET) scans, which use a small amount of a radioactive drug, or tracer, to test how tissues in the brain are actually functioning.

This type of imaging uses a radioactive tracer to look for chemical signs of disease in specific tissues.

By using PET and radioactive tracers, the researchers can show the flow of liquid or gas in the rock.

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.

The first step in these trials would look at the distribution and potential toxicity of the radioactive manganese chloride used as a tracer.

I was full of happiness, although the radioactive tracer meant I couldn't hug my children.

Nuclear Imaging for Animals is a state - of - the - art medical imaging facility where we use radioactive tracers to perform nuclear scanning (scintigraphy) for diagnosing of thyroid, bone, liver, and kidney diseases in dogs and cats.

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.

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).

http://www.atmos-chem-phys.net/16/3525/2016/ Kristiansen, N. I., Stohl, A., Olivié, D. J. L., Croft, B., Søvde, O. A., Klein, H., Christoudias, T., Kunkel, D., Leadbetter, S. J., Lee, Y. H., Zhang, K., Tsigaridis, K., Bergman, T., Evangeliou, N., Wang, H., Ma, P. - L., Easter, R. C., Rasch, P. J., Liu, X., Pitari, G., Di Genova, G., Zhao, S. Y., Balkanski, Y., Bauer, S. E., Faluvegi, G. S., Kokkola, H., Martin, R. V., Pierce, J. R., Schulz, M., Shindell, D., Tost, H., and Zhang, H.: Evaluation of observed and modelled aerosol lifetimes using radioactive tracers of opportunity and an ensemble of 19 global models, Atmos.

We used observations of inert and radioactive chemical constituents («tracers») to estimate the rates at which the ocean transports material from the surface to the interior.