Results 21 to 30 of about 163,020 (214)

Degradation changes stable carbon isotope depth profiles in palsa peatlands [PDF]

, 2014
Palsa peatlands are a significant carbon pool in the global carbon cycle and are projected to change by global warming due to accelerated permafrost thaw. Our aim was to use stable carbon isotopes as indicators of palsa degradation.
Leifeld, J., C. Alewell, J. P. Krüger, Alewell, C., Krueger, J. P., J. Leifeld   +5 more
core   +1 more source

δ13C and δ18O Stable Isotope Analysis Applied to Detect Technological Variations and Weathering Processes of Ancient Lime and Hydraulic Mortars

Geosciences, 2018
Samples of mortars were collected from lime and hydraulic mortars affected by environmental degradation. A total of 63 samples were obtained from Hellenistic, Late Roman and Byzantine historic constructions located at Kavala, Drama and Makrygialos in ...
Elissavet Dotsika, Dafni Kyropoulou, Vassilios Christaras, Georgios Diamantopoulos   +3 more
doaj   +1 more source

Determination of Isotopic Abundance of 15N-Labeled Amino Acids in Tea

Journal of Isotopes, 2020
A method for determination alanine, serine, glutamic acid, asparagine, theanine, glutamine in tea leaves by MSTFA derivatization has been established. And six amino acids were detected successfully.
HOU Jie;ZHANG Pengshuai;HOU Jinghua;LEI Wen;DU Xiaoning
doaj   +1 more source

Trophic structure in a seabird host-parasite food web: insights from stable isotope analyses [PDF]

, 2010
Ecological studies on food webs rarely include parasites, partly due to the complexity and dimensionality of host-parasite interaction networks. Multiple co-occurring parasites can show different feeding strategies and thus lead to complex and cryptic ...
Gómez-Díaz Elena, Gómez Díaz, Elena, González-Solís, Jacob, González-Solís Jacob   +3 more
core   +1 more source

Carbon stable isotope analysis of cereal remains as a way to reconstruct water availability: preliminary results [PDF]

, 2011
Reconstructing past water availability, both as rainfall and irrigation, is important to answer questions about the way society reacts to climate and its changes and the role of irrigation in the development of social complexity.
Jenkins, Emma L., Jenkins, Emma, Emma Jenkins, Pascal Flohr, Muldner, Gundula, Muldner, G., Flohr, Pascal, Flohr, P., Gundula Müldner   +8 more
core   +1 more source

Chemical Analysis Suggesting Origin of Raw Materials and Possible Recycling of Late Antique Roman Glass from Vasileos Irakleiou Street 45, Thessaloniki in Northern Greece

Applied Sciences, 2022
During antiquity, it is known that glass was produced in specialized primary workshops in Levant and Egypt, and this glass was melted and formed into objects in secondary workshops, and distributed in most cities and towns of the Roman Empire.
Petros Karalis, Elissavet Dotsika, Athanasios Godelitsas, Anastasios Antonaras, Anastasia Elektra Poutouki, Maria Tassi   +5 more
doaj   +1 more source

Stable oxygen and carbon isotope compositional fields for skeletal and diagenetic components in New Zealand Cenozoic nontropical carbonate sediments and limestones: A synthesis and review [PDF]

, 1996
The stable oxygen isotope composition (δ18O) of a precipitated carbonate depends mainly on the isotope composition, salinity, and temperature of the host fluid, whereas the stable carbon isotope composition (δ13C) reflects the source of CO2 for ...
Nelson, Campbell S., Campbell S. Nelson, Smith, Abigail M., Abigail M. Smith   +3 more
core   +1 more source

Influence of Climate on Stable Nitrogen Isotopic Values of Contemporary Greek Samples: Implications for Isotopic Studies of Human Remains from Neolithic to Late Bronze Age Greece

Geosciences, 2019
In this paper, we study δ15N enrichment as an indicator not only of marine protein diet, but also of climate change. The slope of the variation of δ15N with precipitation was calculated equal to 0.38/100 mm of precipitation for Greek plants, 0 ...
Elissavet Dotsika, Georgios Diamantopoulos   +1 more
doaj   +1 more source

Microbial carbon recycling – an underestimated process controlling soil carbon dynamics – Part 1: A long-term laboratory incubation experiment [PDF]

Biogeosciences, 2015
Independent of its chemical structure carbon (C) persists in soil for several decades, controlled by stabilization and recycling. To disentangle the importance of the two factors on the turnover dynamics of soil sugars, an important compound of soil ...
A. Basler, M. Dippold, M. Helfrich, J. Dyckmans   +3 more
doaj   +1 more source

Establishment of a Greek Food Database for Palaeodiet Reconstruction: Case Study of Human and Fauna Remains from Neolithic to Late Bronze Age from Greece

Geosciences, 2019
We review the stable isotopic data of recovered Greek bones from the Early Neolithic to the Late Bronze period in order to examine dietary changes over time. As an isotopic baseline we use the published fauna data of the periods.
Elissavet Dotsika, Georgios Diamantopoulos, Spyridon Lykoudis, Sofia Gougoura, Elena Kranioti, Petros Karalis, Dimitra Michael, Eleni Samartzidou, Emmanouil Palaigeorgiou   +8 more
doaj   +1 more source