Results 1 to 10 of about 499,001 (359)

Dynamics of trace and rare earth elements during long-term (over 4 years) decomposition in Scots pine and Norway spruce forest stands, Southern Sweden

open access: yesFrontiers in Environmental Science, 2023
The temporal dynamics of 33 major, trace, and rare earth elements (REEs) were studied in the litter samples containing Swedish Norway spruce (Picea abies) (NSL) and Scots pine (Pinus sylvestris) (SPL), with the aim to assess their release and ...
Mukesh K. Gautam   +5 more
doaj   +1 more source

Pig management in the Neolithic Near East and East Asia clarified with isotope analyses of bulk collagen and amino acids

open access: yesFrontiers in Ecology and Evolution, 2022
The chemical analysis of animal bones from ancient sites has become a common approach in archeological research investigating animal utilization and domestication by past humans.
Yu Itahashi
doaj   +1 more source

The 15N gas-flux method to determine N2 flux: a comparison of different tracer addition approaches [PDF]

open access: yesSOIL, 2020
The 15N gas-flux method allows for the quantification of N2 flux and tracing soil N transformations. An important requirement for this method is a homogeneous distribution of the 15N tracer added to soil.
D. Lewicka-Szczebak, R. Well
doaj   +1 more source

Nitrite isotope characteristics and associated soil N transformations

open access: yesScientific Reports, 2021
Nitrite (NO2 −) is a crucial compound in the N soil cycle. As an intermediate of nearly all N transformations, its isotopic signature may provide precious information on the active pathways and processes.
Dominika Lewicka-Szczebak   +4 more
doaj   +1 more source

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

open access: yesBiogeosciences, 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   +3 more
doaj   +1 more source

Microbial carbon recycling: an underestimated process controlling soil carbon dynamics – Part 2: A C3-C4 vegetation change field labelling experiment [PDF]

open access: yesBiogeosciences, 2015
The mean residence times (MRT) of different compound classes of soil organic matter (SOM) do not match their inherent recalcitrance to decomposition. One reason for this is the stabilization within the soil matrix, but recycling, i.e.
A. Basler   +3 more
doaj   +1 more source

Diversity of management strategies in Mesoamerican turkeys: archaeological, isotopic and genetic evidence [PDF]

open access: yesRoyal Society Open Science, 2018
The turkey (Meleagris gallopavo) represents one of the few domestic animals of the New World. While current research points to distinct domestication centres in the Southwest USA and Mesoamerica, several questions regarding the number of progenitor ...
Aurelie Manin   +7 more
doaj   +1 more source

Amount‐dependent isotopic fractionation during compound‐specific isotope analysis [PDF]

open access: yesRapid Communications in Mass Spectrometry, 2003
Abstract The performance of a gas chromatography‐combustion‐isotope ratio mass spectrometry system (GC‐C‐IRMS) with respect to the dependence of δ 13 C values on the amount of sample is presented.
Schmitt, Jochen, Glaser, B., Zech, W.
openaire   +3 more sources

NMR in the Service of Wine Differentiation

open access: yesFoods, 2021
NMR is a swift and highly reproducible spectrometric technique that makes it possible to obtain spectra containing a lot of information about the sample analyzed.
Marko Viskić   +3 more
doaj   +1 more source

C and O Isotope Chemostratigraphy and Bulk Chemistry of Reef Limestones of the Tambaba Formation, Paraíba Basin, Northeastern Brazil [PDF]

open access: yesAnuário do Instituto de Geociências, 2020
This work focuses on the behavior of the C and O isotopes and major and trace element chemistry of the carbonate rocks of the Tambaba Formation, Paraíba Basin, Northeastern Brazil.
José Diego D. Veras   +3 more
doaj   +1 more source

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