Sentences with phrase «as tracers»

At Toolik Lake, Paytan and her colleagues tracked methane concentrations concurrently with two naturally occurring elements (radon and radium) that serve as tracers for groundwater.

The research team tracked methane concentrations along with radon and radium, naturally occurring elements that serve as tracers for groundwater.

Because the galaxies we use as tracers of the Hubble expansion will disappear.

«It turns out that the contribution of star - forming galaxies as tracers of the mass distribution in the distant universe is not negligible,» said Dr. Utsumi.

Weak lensing is a phenomenon that provides a powerful technique for mapping the changing contribution of star - forming galaxies as tracers of the cosmic web.

Deeper redshift surveys combined with similar weak lensing maps should reveal an even greater contribution of star - forming galaxies as tracers of the matter distribution in this higher redshift range.

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.

Starting in the mid-1990s, scientists began using GFP as a tracer for studying biochemical processes.

The cloning was the first step in using GFP as a tracer chemical in organisms other than jellyfish.

Bowern counters that the «instability» of words can actually be a boon, serving as a tracer for how languages change over time.

The technique uses magnetically labeled blood water as a tracer to quantify brain blood flow.

Iron can fuel plankton blooms and influence how the ocean responds to climate change, while the lead images show the impact of past pollution on the ocean and continuing contamination in some parts of the world and aluminium is used as a tracer of desert dust inputs to the ocean.

It is also possible to use the way the gravity of clusters of galaxies distort more distant background galaxies, weak gravitational lensing, as another tracer.

PET scans which use fluorodeoxyglucose (FDG) as a tracer can be used for neuronal loss, and are useful when a reliable short - term prediction of cognitive decline is needed.

«Halogens like chlorine or bromine are added to the water as a tracer for the movement of soil - water.

«Using oxygen as a tracer of galactic evolution.»

Then the scientists calculated the amount of gas dissolved over the millennia, using the helium - 3 isotope as a tracer.

Using ethane as a tracer for fugitive methane emissions, his team found two high - emitting sites in the central United States.

Briceño has found that sucralose can potentially be used not just as a tracer — which flags a potential problem — but also as an indicator, which means it can help to determine the extent of the problem.

It's still unclear what, if any, the larger benefits could be from using sucralose as a tracer or indicator.

Chakravarti further notes that because GBM cells take up methionine much faster than normal glioma cells, positron emission tomography that uses methionine as a tracer (MET - PET) might help map GBM tumors more accurately, allowing more precise surgical removal and radiation - therapy planning.

Such isolated black holes would be too dim to discern at the galactic core, but the x-ray binaries serve as a tracer suggesting they're there — and in really big numbers.

CMIIT will provide researchers with needed education and training on the «nuts and bolts» of translating and transitioning an agent or technique from pre-clinical research into the clinical practice such as tracer development, equipment, and funding.

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

That's what's exciting about finding fullerenes as a tracer,» Becker said.

Using ozone as a tracer, it develops a new rationale for climate modeling.

The concentration of 14C in CO serves as another tracer for the OH inventory [Manning et al., 2005].

I - 129 does have significant value as a tracer of movement of fission products through the environment and the biosphere, since any of it you find was created in the last 60 years and the quantity is essentially unchanged in that time.

Thus applying 14CO2 as tracer simply follows the bulk of CO2 in the atmosphere which is 12CO2 and 13CO2.

Next problem: is 14C suitable as tracer to measure the excess decay time (to avoid the confusion)?

This is a requirement if one of them is to act as a tracer for the others.

Ferdinand Engelbeen: August 7th, 2011 at 1:51 am BobC at 309:... Next problem: is 14C suitable as tracer to measure the excess decay time (to avoid the confusion)?

Add to that the thinning of 14C in the atmosphere by the release of 14C free fossil fuels and thinning by the increase of total CO2 mass, and it is clear that the 14C as tracer is going down much faster than what an extra 12C / 13C mass does.

Koch, D., and D. Rind, 1998: Beryllium 10 / beryllium 7 as a tracer of stratospheric transport.

[1,2 - 3H (N)-RSB-- Hydrocortisone (PerkinElmer NET396250UC) was used as a tracer.

Not exact matches

At the Challenge Festival, startups like as BaseTrace, which «uses DNA - based tracers to track where industrial fluids are going in large, complex environments» and Reliefwatch, a cloud - based system that uses smartphone technology to track inventory and diseases for healthcare organizations in the developing world, battled it out on stage for a grand prize of $ 150,000 in investment.

«If we find that lymphoscintigrams using tilmanocept are at least as good as the conventional radiocolloid tracer in identification and visualization of sentinel nodes, we would like to see a randomised clinical trial involving large numbers of patients,» says Prof de Bree.

Matthias Raab, the programme manager of the site, tells me, euphemistically, that using the tracers «is highly experimental» — in other words, it is not clear that noble gases behave as CO2 does.

First witnessed in Jupiter's clouds as rare flashes of scattered light by Voyager 1 in its 1979 flyby and observed decades later by the Galileo orbiter, Jupiter's lightning is thought to be an indirect tracer of the planet's water content.

The first - in - human PET / CT imaging of 75 patients with 18F - MPG was performed to show that this tracer can be used as a companion diagnostic to identify NSCLC patients with EGFR activating mutant tumors (primary tumor or metastatic) with 84.3 % accuracy.

«We use arterial blood water as a contrast tracer to measure blood flow change, which is highly associated with brain function.»

Ozone — a variety of oxygen — is one such molecule, and is seen as one of the possible tracers that may allow us to detect life on another planet from afar.

The Hiroshima group combined these two tracers: galaxies and their weak lensing signal to map the changing role of massive star - forming galaxies as the universe evolves.

Using a combination of scanning techniques (positron emission tomography (PET) and computed tomography (CT)-RRB-, the researchers were able to track the progress of the tracer as it moved around the body.

A video shows a transparent larva's body as Cryptococcus fungi, made red by a fluorescent tracer, moves through tissue, blood vessels and into the brain.

«We found that, as the streams came together, they became extremely turbulent, and the turbulence very effectively mixed together the tracer dyes,» he said.

The image displays the rotation curve tracers used in the publication over a photograph of the disc of the Milky Way as seen from the Southern Hemisphere.

«Almost all of the fruit salads we analyzed contained levels of the tracer organism, which we were representing as being salmonella,» said Randy Phebus, professor of food safety at Kansas State University and one of the authors of the study «Consumer Food Handling Practices Lead to Cross-Contamination,» recently published in the journal Food Protection Trends.

The prevalences and isotope ratios of the noble, or inert, gases, such as neon, argon, krypton and xenon, provide a valuable tracer of ancient processes, because they are chemically nonreactive and so do not change much over time.

Sucralose is increasingly being used as what experts call a «tracer» — a substance that can help identify where contamination comes from.