Sentences with phrase «isotope analyses on»

The Chronology Laboratory then conducted isotope analyses on the samples.

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.

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.

Not exact matches

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.

«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.

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

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.

Using osteobiography and paleopathology methods as well as stable isotope analysis and mass spectrometry on about 500 skeletons from the dairy - farming area, they have been able to reconstruct the group's diet, disease and overall health.

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.

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.

Stable carbon isotope ratio analyses on trace methane from ice samples.

«It is based on a sophisticated statistical analysis of the isotope composition of sediment in old French wines.

On another note (floral with a bit of spice would be my preference), can I help with the isotope analysis next time?

Based on carbon isotope analyses the methane is of biogenic origin.

This model supports a sophisticated analysis of what we can easily measure: concentrations of a drug / metabolite in plasma, which can be augmented by radio - isotope measurements and so on, that would not be possible if the measurements were considered in isolation.

Typical reconstructions of historic heliospheric magnetic field (HMF) BHMF are based on the analysis of the sunspot activity, geomagnetic data or on measurement of cosmogenic isotopes stored in terrestrial reservoirs like trees (14C) and ice cores (10Be).

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 results of the study are based on the analysis of the variation of carbon isotopes in the annual growth rings of trees.

Furthermore, we found no relationship between δ13C and δ18O (linear mixed effect model, coefficient = − 0.012, df = 82, p = 0.925) when we structured the analysis by individual, a result that might have indicated metabolic effects on carbon and oxygen isotopes (e.g. [23]-RRB-.

They based their findings on analysis of the chemical isotopes locked in ancient ice from the Weddell Sea embayment, and the evidence suggests that in the past, when polar waters became more stratified, the ice sheets melted much more quickly.

c) Average sunspot number prediction by a low - frequency modulation model (dotted curve) based on frequency analysis from sunspot and cosmogenic isotope records, compared to the average sunspot number since 1750 (continuous curve).

However, (1) this group's work on varved Finnish lake sediments continues, with analysis expanded to include additional characteristics, e.g. stable isotope composition.

Hansen's climate analyses have been based not only on the very basic physics that goes into climate model design, but on the detailed studies of the geological ice core and isotope records that are used to constrain and confirm climate model sensitivity.