RT info:eu-repo/semantics/article
T1 Wax lipids in fresh and charred anatomical parts of the Celtis australis tree: Insights on paleofire interpretation
A1 Jambrina Enríquez, Margarita
A1 Herrera-Herrera, Antonio V.
A1 Mallol, Carolina
A2 Biología Animal y Edafología y Geología
K1 n-Alkanes
K1 Fatty acid
K1 Aromatics
K1 Carbon isotopes
K1 Compound-specific isotopes
K1 Plant biomarkers
K1 Wood
K1 Paleofire
K1 Combustion structure
AB Leaf waxes have been assumed to be the dominant source of wax delivered to sediment. However, wooden branches and twigs have not been widely considered in this context and could be a potential sourceof wax lipids in fire places or combustion structures. Black sedimentary layers are the main material ofopen-air archaeological combustion structures and represent either carbonized fuel (wood) or thecharred ground beneath the fire (mainly leaves) and it is difficult to discern between the two sources.To identify different plant parts as components of combustion residues, fresh and charred leaves,branches and twigs (bark and xylem) of the Celtis australis tree were analyzed for aliphatic and aromatichydrocarbons and fatty acid concentrations, as well as the carbon isotopic composition of n-alkanes(d13Calkane). Charred biomass was produced under limited oxygen conditions at 150, 250 (3 and 5 h),350 and 450  C for 1 h. The n-alkyl profiles in different parts of C. australis are sufficiently distinct to allowtheir identification as components of combustion structures under low combustion temperature conditions. Average chain lengths and carbon preference index ratios decrease with increasing temperatureand vary among plant parts. The d13Calkane values remained slightly unaltered up to 350  C and changedby 3–4‰ at 450  C. Our results provide new information on the molecular and isotopic changes that occurupon burning different plant parts, which in turn show potential for good preservation of organic matterin archaeological black layers and for positive identification of burned leaf and wood residues in them. 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license
YR 2018
FD 2018
LK http://riull.ull.es/xmlui/handle/915/36262
UL http://riull.ull.es/xmlui/handle/915/36262
LA en
NO Sexenios
DS Repositorio institucional de la Universidad de La Laguna
RD 22-nov-2024