Results 71 to 80 of about 112,190 (278)
Radiocarbon Dates from the Pine Snake Site (41CE467), Cherokee County, Texas [PDF]
, 2016 The Pine Snake site is a late 17th to early 18th century Caddo Indian archaeological site located on private land in the northwestern part of Cherokee County, Texas, in the valley of the westward-flowing Flat Creek, a tributary to the Neches River.
Perttula, Timothy K.
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The myths and realities of Bayesian chronological modeling revealed [PDF]
, 2017 We review the history of Bayesian chronological modeling in archaeology and demonstrate that there has been a surge over the past several years in American archaeological applications.
Hamilton, W. Derek, Krus, Anthony M.
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Tartu Radiocarbon Dates XII [PDF]
Radiocarbon, 1976 IntroductionThis list includes dates of geological samples measured using a single-channel liquid scintillation 14C counter at the Geochemical and Statistical Laboratory, Tartu, Estonia. Our modern standard is made of benzene enriched in 14C, and its activity is checked with NBS oxalic acid standard sample.
openaire +4 more sources
Clinical Pharmacology &Therapeutics, EarlyView.Human radiolabeled mass balance studies are crucial for comprehensively characterizing the absorption, distribution, metabolism, and excretion (ADME) of investigational drugs, providing essential data for drug development, regulatory evaluation, and product labeling.
Jason Boer +24 more
wiley +1 more source
Influence of mollusk species on marine DELTA R determinations [PDF]
, 2005 Radiocarbon ages were measured on replicate samples of burnt grain and 5 mollusk species collected from a single sealed layer at an archaeological site (Hornish Point) on the west coast of South Uist, Scotland.
Ascough, P.L. +4 more
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Radiocarbon, 1974 A radiocarbon facility has been installed at the University of California, Riverside (UCR) to support interdisciplinary studies including archaeologic, archaeometric, geophysical, and geologic research. The laboratory was built between 1970 and 1973. Initially, a sample pretreatment and combustion system designed for a proportional CO2 counting system ...
openaire +3 more sources
Decoupling climate and human impacts on the nitrogen cycle during the Irish Bronze Age
Journal of Quaternary Science, EarlyView.ABSTRACT Disentangling climate variability and human activity in past nitrogen cycling is key to understanding ecosystems. Previous studies in Ireland observed a widespread, permanent shift in terrestrial nitrogen cycling during Later Prehistory, potentially linked to intensifying land‐use.
Sarah Ferrandin +2 more
wiley +1 more source
The fifth international radiocarbon intercomparison (VIRI): An assessment of laboratory performance in stage 3 [PDF]
, 2010 Proficiency testing is a widely used, international procedure common within the analytical chemistry community. A proficiency trial (which VIRI is) often follows a standard protocol, including analysis that is typically based on zscores, with one key ...
Cook, G., Naysmith, P., Scott, E.M.
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Journal of Quaternary Science, EarlyView.ABSTRACT During the last glacial period, the Laurentide Ice Sheet (LIS) was the largest terrestrial ice sheet on Earth. Its evolution since the Last Glacial Maximum profoundly influenced Earth's geodynamics and surface processes. Investigating the past dynamics of the LIS provides critical insights into how contemporary ice sheets may respond to ...
Alexis P. Belko +3 more
wiley +1 more source
Is the Sun a Long Period Variable [PDF]
, 1990 The inventory of atmospheric radiocarbon exhibits quasi-periodic variations of mean period of bar-lambda=269 years over the entire 9000 year record. But the period is inconstant and subject to random variability (sigma m exp. 1/2 = 119 years).
Sonett, Charles P.
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