Sentences with phrase «radioactive tracers»

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.

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).

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.

Incongruously rendered in hyper - visible candy colors, the ash swirls glow like radioactive tracers in a nuclear medicine scan.

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.

To see how the two gene versions affect the living human brain, the NIMH researchers scanned 24 healthy young adults twice using PET (positron emission tomography), which uses radioactive tracers to visualize brain function.

So far, the imaging requires radioactive tracers.

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.

«When we got the first inkling that our new mechanism might be useful for developing radioactive tracers, we started looking at Berkeley Lab and its Biomedical Isotope Facility, which was really central to this work,» Levin said.

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

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.

Using radioactive tracers, they found that a phosphorous molecule has to attach in a certain spot.

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

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.

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.

In the sentinel node biopsy procedure, a radioactive tracer and a blue - colored dye are injected at or near the melanoma site on the skin and tracked to the first lymph node (s).

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

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

Then, the team could work to develop radioactive tracer incorporating that compound.

Participants in all three groups received a harmless radioactive tracer that illuminates CB1 receptors when exposed to positron emissions tomography (PET scans).

Yes: To have a bone scan, a radioactive tracer is injected into the blood system.

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.

A variant called the nuclear stress test involves introducing a radioactive tracer into the body to visualize alterations in blood flow within the heart.

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

It involves taking a radioactive tracer, an iodine «pill», around 4 to 6 hours before the first scan.

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.

C14 is one in a trillion and a perfect radioactive tracer, detectable in incredibly small quantities.

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.

Like a key fitting into a lock, the carrier molecules bind to certain receptors or biomarkers and the radioactive atoms enable PET or SPECT scanners to image areas where the tracers have collected in large numbers.

«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.

Here the tracer is radioactive glucose.

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

The individual receives a radioactive «tracer» chemical in the blood that shows up during the scan.

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.