Single amino acid radiocarbon dating of Upper Paleolithic modern humans.
|Abstract||Archaeological bones are usually dated by radiocarbon measurement of extracted collagen. However, low collagen content, contamination from the burial environment, or museum conservation work, such as addition of glues, preservatives, and fumigants to "protect" archaeological materials, have previously led to inaccurate dates. These inaccuracies in turn frustrate the development of archaeological chronologies and, in the Paleolithic, blur the dati ... [truncated at 450 characters in length]|
|Author||Marom, A; McCullagh, JS; Higham, TF; et al|
|Key phrase||Animals Biological Markers Bone and Bones Carbon Radioisotopes Chromatography, High Pressure Liquid Collagen Fossils Funeral Rites History, Ancient Hydroxyproline Mass Spectrometry Nitrogen Russia Time Factors|
Liquid chromatography/isotope ratio mass spectrometry measurement of δ13C of amino acids in plant proteins.
|Abstract||In archaeological studies, the isotopic enrichment values of carbon and nitrogen in bone collagen give a degree of information on dietary composition. The isotopic enrichments of individual amino acids from bone collagen and dietary protein have the potential to provide more precise information about the components of diet. A limited amount of work has been done on this, although the reliability of these studies is potentially limited by fraction ... [truncated at 450 characters in length]|
|Author||Lynch, AH; McCullagh, JS; Hedges, RE;|
|Key phrase||Amino Acids Archaeology Carbon Isotopes Chromatography, Liquid Discriminant Analysis Great Britain Mass Spectrometry Plant Leaves Plant Proteins Plants Seeds|
Inhibition of [FeFe]-hydrogenases by formaldehyde and wider mechanistic implications for biohydrogen activation.
|Abstract||Formaldehyde-a rapid and reversible inhibitor of hydrogen evolution by [FeFe]-hydrogenases-binds with a strong potential dependence that is almost complementary to that of CO. Whereas exogenous CO binds tightly to the oxidized state known as H(ox) but very weakly to a state two electrons more reduced, formaldehyde interacts most strongly with the latter. Formaldehyde thus intercepts increasingly reduced states of the catalytic cycle, and density ... [truncated at 450 characters in length]|
|Author||Foster, CE; Krämer, T; Wait, AF; et al|
|Key phrase||Carbon Monoxide Clostridium acetobutylicum Enzyme Inhibitors Formaldehyde Hydrogen Hydrogenase Iron Metalloproteins|
Analysis of amino acid 13C abundance from human and faunal bone collagen using liquid chromatography/isotope ratio mass spectrometry.
|Abstract||The scope of compound-specific stable isotope analysis has recently been increased with the development of the LC IsoLink which interfaces high-performance liquid chromatography (HPLC) and isotope ratio mass spectrometry (IRMS) to provide online LC/IRMS. This enables isotopic measurement of non-volatile compounds previously not amenable to compound-specific analysis or requiring substantial modification for gas chromatography/combustion/isotope r ... [truncated at 450 characters in length]|
|Author||McCullagh, JS; Juchelka, D; Hedges, RE;|
|Key phrase||Amino Acids Animals Archaeology Bone and Bones Carbon Isotopes Chromatography, High Pressure Liquid Collagen History, 15th Century Humans Mass Spectrometry|
Amino acid delta13C analysis of hair proteins and bone collagen using liquid chromatography/isotope ratio mass spectrometry: paleodietary implications from intra-individual comparisons.
|Abstract||We report a novel method for the chromatographic separation and measurement of stable carbon isotope ratios (delta(13)C) of individual amino acids in hair proteins and bone collagen using the LC-IsoLink system, which interfaces liquid chromatography (LC) with isotope ratio mass spectrometry (IRMS). This paper provides baseline separation of 15 and 13 of the 18 amino acids in bone collagen and hair proteins, respectively. We also describe an appro ... [truncated at 450 characters in length]|
|Author||Raghavan, M; McCullagh, JS; Lynnerup, N; et al|
|Key phrase||Amino Acids Bone and Bones Carbon Isotopes Chromatography, Liquid Collagen Diet Humans Keratins, Hair-Specific Mass Spectrometry Mummies|