This research was also supported by the Center for Accelerator Mass Spectrometry
under the University Collaborative Research Program at Lawrence Livermore National Laboratory and was performed, in part, under the auspices of the United States Department of Energy by University of California, Lawrence Livermore National Laboratory under Contract No.
[sup.41]Ca and accelerator mass spectrometry
to monitor calcium metabolism in end stage renal disease patients.
Direct radiocarbon dating of prehistoric cave paintings by accelerator mass spectrometry
. Meas Sci Tech.
Subsequent metrological and scientific advances have included: a major improvement in [.sup.14]C decay counting precision leading to the discovery of natural [.sup.14]C variations; the global tracer experiment following the "pulse" of excess [.sup.14]C from atmospheric nuclear testing; the growing importance of quantifying sources of biomass and fossil carbonaceous contaminants in the environment; the revolutionary change from decay counting to atom counting (AMS: accelerator mass spectrometry
) plus its famous application to artifact dating; and the demand for and possibility of [.sup.14]C speciation (molecular dating) of carbonaceous substances in reference materials, historical artifacts, and in the natural environment.
Key words: age determination; bet hedging; [[blank].sup.14]C; desert annual; nuclear bombs; Pectocarya recurvata; population persistence; seed bank age structure; seed dormancy; Sonoran Desert; tandem accelerator mass spectrometry
(TAMS); viable seed number vs.
The group used a method known as accelerator mass spectrometry
to isolate iron-60 from elements and molecules of different masses.
Enter a new method of dating called accelerator mass spectrometry
(AMS), which allowed O'Brien to test just a few of the shoes' fibers to date them.
A third recent step forward has been the use of accelerator mass spectrometry
for radiocarbon dating of the seeds themselves, building a chronology of agricultural development based on the actual crops rather than on putatively associated materials.
Using accelerator mass spectrometry
, the researchers extracted, analyzed and radiocarbon dated organic samples from the casting process.
It also includes contributions on bioorganic mechanisms important to coenzyme functions, vitamin-dependent modifications of chromatin (epigenetic events and genomic stability), accelerator mass spectrometry
in the study of vitamins and mineral metabolism in humans, and dietary reference intakes for vitamins.