Sentences with phrase «isotope analysis»

[7] Recent evidence from stable isotope analysis of Holocene fur seal bone collagen (δ13C and δ15N) indicates that before the maritime fur trade, it was more common for these animals to breed at local rookeries in British Columbia, California, and likely along much of the northwest coast of North America.

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 the increasing amounts of CO2 in the atmosphere come from fossil fuels was already demonstrated by isotope analysis in the 1950s.

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.

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

Applicability of stable C and N isotope analysis in inferring the geographical origin and authentication of commercial fish (Mackerel, Yellow Croaker and Pollock)

Although Washington's residents often joke that the city was built on a swamp, carbon isotope analysis showed that the methane in the air came from fossil fuels, not modern swamp microbes.

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.

Interestingly the wealthiest grave, with a large cruciform brooch, belonged to the individual of native British ancestry (O4), and the individual without grave goods was one of the two genetically «foreign» ones (O2), an observation consistent with isotope analysis at West Heslerton which suggests that new immigrants were frequently poorer26, 27.

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.

The Chronology Laboratory then conducted isotope analyses on the samples.

We compare two methods of isolating bone collagen for stable carbon and nitrogen isotope analysis.

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.

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

Hosler has completed the first application of lead isotope analysis to ancient Mesoamerican metallurgy by sampling ore sources in several areas and artifacts from a variety of sites, including Yautepec.

Isotope analyses confirm an itinerant life style, well in tune with the martial society that dominated 8th to 10th century northern Europe.

Based on radiometric dating and geochemical isotope analysis, Czaja characterizes his fossils as having formed in this early Vaalbara supercontinent in an ancient deep seabed containing sulfate from continental rock.

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

A Late Maastrichtian age estimate for the unit has been supported by both stable strontium isotope analyses [12] and ammonite biostratigraphy [13].

The study by Louie Yang (Dept. Entomology at UC - Davis) used stable hydrogen isotope analysis to test tissue samples from 114 butterflies at 4 overwintering locations.

Strontium staining was used as a proxy for coral growth rates, and skeletal samples were taken for boron isotope analysis.

Via various isotope analyses and flow models, Jasechko (2017) estimated that between 42 - 85 % of all groundwater stored in the upper 1 kilometer of the earth's crust is water that had infiltrated the ground more than 11,000 years ago, during last Ice Age.

I always think of it as anthropogenic CO2 is «old» carbon with «young» oxygen, the old and young part being determined by isotope analysis similar to carbon dating.

However, estimates of groundwater re-charge via isotope analyses can provide critical information regards rates of groundwater re-charge and discharge.

Molecular dating and stable isotope analyses also show that by very early in their evolutionary history, polar bears were already inhabitants of the Artic sea ice and had adapted very rapidly to their current and unique ecology at the top of the Arctic marine food chain.

In organic geochemistry, compound specific isotope analyses and new biomarker methods are valuable for interpreting depositional environments, tracing fluid flow patterns, and understanding oceanic processes (Cubitt and England, 1995; Waples and Machihara, 1991; Schoell et al., 1994).

The new record resulted from oxygen isotope analysis of more than 1,700 calcium carbonate samples taken from four stalagmites found in three different northern Borneo caves.

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

Isotope analyses showed that while the first fall had separated from its parent body about 3 million years ago, the second object became detached about 50 million years ago.

Carbon and oxygen isotope analyses of teeth from the Ar.

Global ID, a leading inspection agency, is using DNA fingerprinting and isotope analysis to detect GMOs and authenticate food origins.

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.

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.

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

«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.