Sentences with phrase «isotope analysis of»

Preliminary results of oxygen isotope analysis of tree rings suggests anomalously low values during the 11th Century, perhaps indicating large - scale changes in circulation.

Tree ring and carbon isotope analysis of a sample of trees on the study sites would give measurable data for evaluating this question, which would be a good field study to follow this modeling exercise.

The video is an excellent introduction to a range of classroom Black pitch, carved histories: Radiocarbon dating, wood species identification and strontium isotope analysis of prehistoric wood carvings from Trinidad's

Black pitch, carved histories: Radiocarbon dating, wood species identification and strontium isotope analysis of prehistoric wood carvings from Trinidad's

Isotope analysis of bone and tooth material from King Richard III has revealed previously unknown details of his early life and the change in his diet when he became King two years and two months before he was killed at the Battle of Bosworth.

Isotope analysis of nitrogen and carbon in her hair reveal a diet likely comprising maize and seafood, which, along with other evidence suggest South American origin and a life spent in coastal Peru or Chile.

He teamed up with coauthor Paul Koch, a professor of Earth sciences and dean of physical and biological sciences at UC Santa Cruz, to do the isotope analysis of hair and bone samples.

Bone isotope analysis of babies who died in infancy?

Carbon and oxygen isotope analyses of teeth from the Ar.

The team showed through isotope analyses of meteorites that Jupiter's solid core formed within only about 1 million years after the start of the solar system history, making it the oldest planet.

Not exact matches

Scientists can determine where an individual piece of meat comes from using a technique called isotope analysis, looking at the specific fingerprints of carbon, hydrogen, and nitrogen atoms to see where a cow lived.

A recent analysis of chondrites by Carnegie's Myriam Telus was concerned with iron - 60, a short - lived radioactive isotope that decays into nickel - 60.

The theory is based on new analysis of xenon isotopes detected by scientists from the V.G. Khlopin Radium Institute in the Leningrad, four days after the accident, at Cherepovets, a city north of Moscow far from the major track of Chernobyl debris.

Geochemist Wolfgang Müller of Royal Holloway, University of London, who had already used isotope analysis to establish Ötzi's South Tyrol origins, has now turned to this question once more.

Upon analysis, the samples» carbon isotope values revealed an exceptionally arid region deep in Asia's interior going back 23 million years, initially ringed by areas of higher rainfall.

Second, analysis of isotopes, which can distinguish among sources of emissions, demonstrates that the majority of the increase in carbon dioxide comes from combustion of fossil fuels (coal, oil and natural gas).

A 2004 analysis of strontium isotopes, which vary according to regional geochemistry, suggested that some Beaker - associated individuals did migrate in their lifetimes.

Analysis of the water leaving Venus's atmosphere, however, shows that many of the hydrogen ions are actually a stable isotope of the element called deuterium, which consists of a proton and a neutron (rather than just a proton) in its nucleus.

The researchers used stable isotope analysis, a chemical assay of a tissue biopsy that provides an integrative view of what the animal ate in previous months.

They also performed DNA analyses of water samples to identify larvae of vent animals and stable - isotope analysis to assess food supplies at each vent field.

Analyses of samples brought back from the Apollo missions in the 1970s showed that the Moon has the same abundances of the three stable isotopes of oxygen as Earth.

But now an analysis of isotopes from meteorites seems to imply that the wet stuff got here much sooner.

In his talk, Agee presented the results of the isotope analysis for oxygen as well as hydrogen.

But analysis of particles and isotopes from comets and meteorites present a mixed picture of solar system formation, more complicated than just a one - way movement of matter from the disk to the star.

«A lot of this rests on the carbon isotope analysis,» Rothman says, which is exceptionally strong and clear in this part of the geological record.

The analysis of the uranium - thorium isotopes gave the skeleton a minimum age of 11,300 years.

Angst et al. conducted carbon isotope analysis on fossils of Gastornis and several contemporaneous herbivorous mammals across several European sites and compared these to isotope profiles from extant birds with known diets.

That dramatic idea encountered skepticism until an analysis of the lunar rocks showed that they have the same mix of oxygen isotopes as rocks found on Earth, strongly suggesting a shared origin.

Isotope analyses focused on 15N, which reflects dietary animal protein and 34S, which showed an increased amount of railway vegetation for rail - using bears in a previous study.

The new analysis «is an elegant example of how to use the geochemistry of a fossil to infer the behavior and movement of an ancient creature,» says Henry Fricke, an isotope geochemist at Colorado College in Colorado Springs.

The team based its analysis on ratios of oxygen and hydrogen isotopes in ice cores drilled in East Antarctica.

A subsequent isotope analysis makes it possible to determine the precise percentage of ice - algae carbon in the fish's diet.

By September, Bohr and Wheeler had produced a thorough theoretical analysis, explaining the physics underlying the fission process and identifying which isotope of uranium fissioned most readily.

It's not clear why this mega-marsupial, which weighed up to 2,800 kilograms, migrated, but an analysis of carbon isotopes in the tooth suggests that D. optatum ate a fairly limited diet.

Analysis of isotope ratios in hair samples showed how much of the bears» diets came from human food.

Knudson and Ravelo based their findings on an analysis of carbon and oxygen isotopes in the calcium carbonate shells of tiny marine organisms called foraminifera, which are preserved in seafloor sediments.

Participation in the project will be entirely voluntary, and will test whether there is the potential for these investigations to be supported by wider use of DNA testing and isotope analysis.

Previous analyses of the isotopes in the bones of the 11 Stone Age individuals also showed the hugely different diet the two groups had.

A light spectrum analysis of HD82943a star slightly hotter and larger than the sun, harboring its own planetary systemrevealed that it contained traces of an isotope of lithium called Lithium - 6, or 6Li.

The next step, she says, is to use stable isotope analysis to see if the Mexican turkeys had high levels of corn in their diets — a sign that they were being fed by humans.

Because C4 plants concentrate more of carbon's heavier isotopes compared with C3 plants, a technique called stable isotope analysis — which measures the relative concentrations of isotopes in animal bones — can often detect which plants predominate in the diet.

The difference between using DNA analysis and isotope tracking is a variation on the nature versus nurture debate: DNA records an organism's genetic inheritance, and isotopes reflect the composition of the environment in which it grows.

An isotopes analysis was used to determine that many pieces of turquoise found in New Mexico's Chaco Canyon came from as far away as Nevada

ORNL's Steven Dajnowicz (left) and Andrey Kovalevsky prepared a sample to begin neutron structural analysis of a vitamin B6 - dependent protein using the IMAGINE beamline at ORNL's High Flux Isotope Reactor.

Analyses revealed that the long - incubated fluids contained low concentrations of methane with a lower - than - normal concentration of the carbon - 13 isotope — a sure sign that methane - producing microorganisms were living in the fluid, the researchers report online today in Science.

This size reduction could be linked to the spread of semi-free foraging practices of cattle during the Early Middle Ages, a trend seen elsewhere in Europe and which has been confirmed by the analysis of stable isotopes; this work was carried out by the research group which Idoia Grau belongs to and was published a few months ago in Quaternary International.

In recent years, art historians have deployed increasingly sophisticated scientific tools — from analysis of isotopes to infrared reflectography — to evaluate the authenticity of artworks.

«Watching a forest breathe: Using highly sensitive isotope analysis, a research team has obtained detailed measurements of carbon exchange in a temperate forest.»

Next, he and his colleagues will run stable isotope analyses on the hair to estimate of just how much salmon the bear consumed during the previous year's salmon run.

This size reduction could be linked to the spread of semi-free foraging practices of cattle during the Early Middle Ages, a trend seen elsewhere in Europe and which has been confirmed by the analysis of stable isotopes; this work was carried out by the research group which Idoia Grau belongs to and was published a few months ago in «Quaternary International» (http://www.sciencedirect.com/science/article/pii/S1040618214003516).