Results 11 to 20 of about 164,599 (316)

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

Frontiers 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, Mukesh K. Gautam, Björn Berg, Kwang-Sik Lee, Torbjörn Nilsson, Hyung Seon Shin   +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

Frontiers 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]

SOIL, 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

Scientific 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, Anne Jansen-Willems, Christoph Müller, Jens Dyckmans, Reinhard Well   +4 more
doaj   +1 more source

Characterization of Organic Nitrogen by Chlorination, Ozonation, and Stable Isotope Analysis of Nitrate. [PDF]

Environ Sci Technol
Ra J, Huang K, Mohn J, Hofstetter TB, Muck E, von Gunten U.   +5 more
europepmc   +2 more sources

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

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

Biogeosciences, 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, M. Dippold, M. Helfrich, J. Dyckmans   +3 more
doaj   +1 more source

NMR in the Service of Wine Differentiation

Foods, 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, Luna Maslov Bandić, Ana-Marija Jagatić Korenika, Ana Jeromel   +3 more
doaj   +1 more source

Multidisciplinary lines of evidence reveal East/Northeast Asian origins of agriculturalist/pastoralist residents at a Han dynasty military outpost in ancient Xinjiang

Frontiers in Ecology and Evolution, 2022
Han/non-Han interactions were engrained among the border regions of ancient Imperial China. Yet, little is known about either the genetic origins or the lifeways of these border peoples.
Edward Allen, Yao Yu, Xiaomin Yang, Yiran Xu, Yiran Xu, Panxin Du, Jianxue Xiong, Dian Chen, Xiaohong Tian, Yong Wu, Xiaoli Qin, Pengfei Sheng, Pengfei Sheng, Pengfei Sheng, Chuan-Chao Wang, Chuan-Chao Wang, Chuan-Chao Wang, Chuan-Chao Wang, Shaoqing Wen, Shaoqing Wen, Shaoqing Wen   +20 more
doaj   +1 more source

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

Rapid 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