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.
Carbon and oxygen
isotope analyses of teeth from the Ar.
Bone
isotope analysis of babies who died in infancy?
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.
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.
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.
Black pitch, carved histories: Radiocarbon dating, wood species identification and strontium
isotope analysis of prehistoric wood carvings from Trinidad's
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
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.
Preliminary results of oxygen
isotope analysis of tree rings suggests anomalously low values during the 11th Century, perhaps indicating large - scale changes in circulation.
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).