Ernst et al., "Trace analysis of the radionuclides [sup.90]Sr and 89Sr in environmental samples II: accelerator mass spectrometry
(AMS)," Angewandte Chemie International Edition in English, vol.
Use of accelerator mass spectrometry
to measure the pharmacokinetics and peripheral blood mononuclear cell concentrations of zidovudine.
1987) and measured for [sup.14]C content by accelerator mass spectrometry
(AMS) at the Center for Accelerator Mass Spectrometry
, Lawrence Livermore National Laboratory, Livermore, CA, USA.
Such a marker, which would not require accelerator mass spectrometry
or the administration of isotopic tracers, could provide information that cannot be gained from bone biochemical markers, and provide it more quickly than is possible with observed changes in bone mineral density (BMD).
Xceleron is the only good laboratory practice (GLP) - accredited biomedical facility in the world with unique expertise in the field of zeptobiology - ultra-sensitive drug and metabolite analysis using accelerator mass spectrometry
The redevelopment of WHOI facilities continues as 11,000 square feet are added to the McLean Laboratory to expand the seafloor sample storage facility and the world-renowned National Ocean Sciences Accelerator Mass Spectrometry
In recent years, radiocarbon dating techniques (e.g., accelerator mass spectrometry
) have allowed us to date samples of pigment from cave paintings and not rely solely on evidence from surrounding artifacts.
(1) Department of Physics, University of North Dakota, (2) USDA--ARS Grand Forks Human Nutrition Research Center, Grand Forks, ND, and (3) Center for Accelerator Mass Spectrometry
, Lawrence Livermore Laboratory, Livermore, CA
Key words: accelerator mass spectrometry
; apportionment of fossil and biomass carbon; "bomb" [.sup.14]C as a global tracer; dual isotopic authentication; metrological history; molecular dating; radiocarbon dating; the Turin Shroud; SRM 1649a.
To authenticate the percentage of biobased content, the committee proposes "Standard Test Methods to Determine the Biobased Content of Natural Range Materials via Radiocarbon ([C.sup.14]/[C.sup.12]) Analysis Using Low Level Liquid Scintillation Counting (LSC) or ([C.sup.14]/[C.sup.12]) Accelerator Mass Spectrometry
(AMS) Coupled With Stable Carbon Isotope Ratio Mass Spectrometry (IRMS) ([C.sup.13]/[C.sup.12]) or Equivalent Methods." To identify biobased content, the committee proposes "Standard for the Identification and Determination of Biobased Content in Materials and Products."
The new techniques include accelerator mass spectrometry
(AMS), a quicker method of radio-carbon dating, and `optically stimulated luminescence' (OSL), which estimates the time since materials were last exposed to sunlight.
Unlike other [[blank].sup.14]C techniques, tandem accelerator mass spectrometry
(TAMS) counts the number of carbon isotope atoms, permitting high precision with small samples.