Sentences with phrase «gas isotope ratios»

Professor Mukhopadhyay continued «The geochemistry indicates that there are differences between the noble gas isotope ratios in different parts of Earth, and these need to be explained.

Not exact matches

Waters produced from unconventional oil and gas wells typically have radium isotope ratios (radium - 228 to radium - 226) that are different than those from conventional oil and gas operations, he said.

Gas - source isotope ratio mass spectrometers are a special breed of a class of instruments — mass spectrometers — that are used in many different areas of science, from physics to biomedical science, for the separation of atoms and molecules of different charges and molecular weights.

In some ways, a California company seems an odd choice for an upstate New York scientist who was determined to put down roots, but with a 90 % market share of gas - source isotope ratio mass spectrometers, applying to Thermo Finnigan was pretty much a no - brainer for someone with Burdett's experience, and it worked out.

Thermo Finnigan's, and Burdett's, expertise is with gas - source isotope ratio mass spectrometers and the peripherals that are attached to them.

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.

Trapped gases within the rock may be extracted and analyzed for their isotope ratios to determine where they originated.

The researchers know these particular Buckyballs are extraterrestrial because the noble gases trapped inside have an unusual ratio of isotopes, atoms whose nuclei have the same number of protons but different numbers of neutrons.

The inert gases such as neon and argon may have two or more isotopes present in a sample and the various ratios of the daughter isotopes to the parent element may reveal much about the stone's origin and past.

The problem is that whatever temperature signal they carry is of questionable resolution, and is commingled with whatever myriad of other factors that influence coral growth rates, or the relative populations of differing microfauna, or Isotope ratios in dissolved gases trapped in ice, or the growth rate of trees... None of these issues would lead any rational person to view the application of these proxies in determining climatological fluctuations on the order of fractions of a degree celsius annually.

The researchers were able to discern agricultural methane from other sources of methane by looking at the gas» isotopic signatures — or the ratio of various carbon isotopes — using data from atmospheric monitoring stations around the world.

«The rapid decrease in carbon isotope ratios in the top panel is indicative of a large increase in atmospheric greenhouse gases CO2 and CH4 that was coincident with an approximately 5 °C global warming (centre panel).»