Sentences with phrase «isotope ratio mass»

«Laser ablation isotope ratio mass spectrometry for enhanced sensitivity and spatial resolution in stable isotope analysis.»

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

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.

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.

Not exact matches

Next, Agee and his colleagues used a laser to extract water molecules trapped within minerals in the meteorite and fed them into a mass spectrometer to calculate the ratio of deuterium, a heavy isotope of hydrogen, to ordinary hydrogen.

As the 2 - to -5-inch-long bivalves grew, their shells incorporated atoms of the elements oxygen and carbon of slightly different masses, or isotopes, in ratios that reveal the temperature of the surrounding seawater.

The authors used highly sensitive instruments mounted on towers as well as soil chambers to continuously measure the ratio of two isotopes of carbon, which differ by their atomic mass.

A mass spectrometer revealed the ratio of two forms, or isotopes, of strontium at the different stages, which can indicate where his drinking water came from when matched to an area's geology.

These ratios are called mass dependent isotope fractionation and are the way sulfur fractionates today.

Investigation of ash sediments from recent Mt. Pinatubo eruptions and other major volcanic events show a signature of mass independent isotope ratios of sulfur, while sediment from minor eruption does not.

Surprisingly, both samples» sulfur isotope ratios fall in the mass - dependent fractionation range and do not show the signal of an oxygenless atmosphere.

There are a multitude number of pieces of evidence for this, stemming from mass balance arguments, changes in isotopes, O2 / N2 ratios, observed changes in carbon in other sources (acting as a sink), paleo - sensitivity studies showing that CO2 is a relatively slow and weak feedback (~ 10 ppm / C), etc..

Strontium isotope ratios can be measured at the delta ppm level using a medium to high resolution magnetic sector mass spectrometer with multiple fixed collectors and either thermal ionization or inductively coupled plasma as an ion source.

You don't seem to understand the concept of the mass balance model, especially since you say the isotope ratio has nothing to do with it.

13 - C / 12 - C isotope mass balance calculations show that IPCC's atmospheric residence time of 50 - 200 years make the atmosphere too light (50 % of its current CO2 mass) to fit its measured 13 - C / 12 - C isotope ratio.