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Open AccessJournal ArticleDOI

Current Pretreatment Methods for AMS Radiocarbon Dating at the Oxford Radiocarbon Accelerator Unit (Orau)

TLDR
In this article, the main chemical pretreatment protocols currently used for AMS radiocarbon dating at the Oxford Radiocarbon Accelerator Unit, updating the protocols last described by Hedges et al.
Abstract
In this paper, we summarize the main chemical pretreatment protocols currently used for AMS radiocarbon dating at the Oxford Radiocarbon Accelerator Unit, updating the protocols last described by Hedges et al. (1989).

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Population genomics of Bronze Age Eurasia

Morten E. Allentoft, +70 more
- 11 Jun 2015 - 
TL;DR: It is shown that the Bronze Age was a highly dynamic period involving large-scale population migrations and replacements, responsible for shaping major parts of present-day demographic structure in both Europe and Asia.
Journal ArticleDOI

The timing and spatiotemporal patterning of Neanderthal disappearance

Thomas Higham, +47 more
- 21 Aug 2014 - 
TL;DR: Improved accelerator mass spectrometry 14C techniques are applied to construct robust chronologies from 40 key Mousterian and Neanderthal archaeological sites, showing that there was ample time for the transmission of cultural and symbolic behaviours, as well as possible genetic exchanges, between the two groups.
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The Beaker phenomenon and the genomic transformation of northwest Europe

Iñigo Olalde, +169 more
- 08 Mar 2018 - 
TL;DR: Genome-wide data from 400 Neolithic, Copper Age and Bronze Age Europeans is presented, finding limited genetic affinity between Beaker-complex-associated individuals from Iberia and central Europe, and excludes migration as an important mechanism of spread between these two regions.
Journal ArticleDOI

Fifty thousand years of Arctic vegetation and megafaunal diet

Eske Willerslev, +55 more
- 06 Feb 2014 - 
TL;DR: The authors' analyses indicate that both graminoids and forbs would have featured in megafaunal diets, and question the predominance of a Late Quaternary graminoid-dominated Arctic mammoth steppe.
References
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Journal ArticleDOI

New Method of Collagen Extraction for Radiocarbon Dating

R. Longin
- 26 Mar 1971 - 
TL;DR: There are, however, frequent and often important errors in 14C bone measurements which arise chiefly because of the difficulty of eliminating completely the numerous pollutants during chemical treatment.
Journal ArticleDOI

Bone Collagen Quality Indicators for Palaeodietary and Radiocarbon Measurements

TL;DR: In this article, chemical, elemental and isotopic parameters for the assessment of collagen quality are discussed, and it is concluded that there is no unequivocal way to detect natural levels of contamination with the discussed parameters, although their use can identify many cases.
Book

Geochemistry of Sedimentary Carbonates

TL;DR: The Oceanic Carbonate System and Calcium Carbonate Accumulation in Deep Sea Sediments are discussed in this article, where the CO2-Carbonic Acid System and Solution Chemistry are discussed.
Journal ArticleDOI

Improved collagen extraction by modified Longin method

TL;DR: In this article, a re-evaluation of the Longin collagen extraction method shows that a lower reflux temperature reduces degradation of protein ("collagen") remnants, which allows additional purification through ultrafiltration to isolate the >30kDalton fraction of the reflux product.
Journal ArticleDOI

Reporting of stable hydrogen, carbon, and oxygen isotopic abundances

TL;DR: The Commission on Atomic Weights and Isotopic Abundances (COWA) as discussed by the authors recommended that isotopic abundances on non-corresponding scales be reported on a scale such that 2 H/ 1 H of SLAP (Standard Light Antarctic Precipitation) is 0.572 times that of VSMOW, and 13 C/ 12 C relative ratios of all substances be expressed relative to VPDB (Vienna Peedee belemnite).
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