Results 41 to 50 of about 130,387 (339)

Tracing the source of soil organic matter eroded from temperate forest catchments using carbon and nitrogen isotopes [PDF]

, 2016
Soil erosion continuously redistributes soil and associated soil organic matter (SOM) on the Earth's surface, with important implications for biogeochemical cycling of essential elements and terrestrial carbon sequestration.
Berhe, AA, Fogel, ML, Hart, SC, Hunsaker, CT, Johnson, DW, McCorkle, EP, McFarlane, KJ   +6 more
core   +1 more source

Stable Isotopes Unveil Dietary Trends in the Samnite and Peligni Communities of Opi Val Fondillo and Sulmona S. Lucia (V–VI Centuries BCE, Abruzzo, Central Italy)

Biology, 2023
The purpose of this study is to gain insights into the subsistence activities and nutrition of the Samnite and Peligni populations who lived in the Abruzzo region (Italy) during the Iron Age. The samples under investigation are from Opi Val Fondillo (AQ)
Iuri Icaro, Inmaculada Alemán, Joan Viciano   +2 more
doaj   +1 more source

The transition zone as a host for recycled volatiles: Evidence from nitrogen and carbon isotopes in ultra-deep diamonds from Monastery and Jagersfontein (South Africa) [PDF]

, 2017
Sublithospheric (ultra-deep) diamonds provide a unique window into the deepest parts of Earth's mantle, which otherwise remain inaccessible. Here, we report the first combined C- and N-isotopic data for diamonds from the Monastery and Jagersfontein ...
Gurney, J.J., Harris, J.W., Le Pioufle, A., Palot, M., Pearson, D.G., Stachel, T., Stern, R.A.   +6 more
core   +1 more source

Different Responses in Root Water Uptake of Summer Maize to Planting Density and Nitrogen Fertilization

Frontiers in Plant Science, 2022
Modifying farming practices combined with breeding has the potential to improve water and nutrient use efficiency by regulating root growth, but achieving this goal requires phenotyping the roots, including their architecture and ability to take up water
Yang Gao, Jinsai Chen, Guangshuai Wang, Zhandong Liu, Weihao Sun, Yingying Zhang, Xiaoxian Zhang   +6 more
doaj   +1 more source

Nitrogen isotope variations in the Solar System [PDF]

Nature Geoscience, 2015
The solar wind, cometary ices, and inner Solar System bodies exhibit distinct nitrogen isotopic compositions. A synthesis of these analyses suggests that these distinct reservoirs may be the result of early fractionation processes.
Füri, Evelyn, Marty, Bernard
openaire   +2 more sources

Subsurface tropical Pacific nitrogen isotopic composition of nitrate: Biogeochemical signals and their transport [PDF]

, 2011
We report measurements of the nitrogen isotopic composition of nitrate (the δ15N of NO3−) across the equatorial Pacific, for zonal transects from 165°E to 95°W and meridional transects across 95° and 110°W.
Charles, Christopher D., Haug, Gerald H., Kaiser, Jan, Rafter, Patrick A., Sigman, Daniel M.   +4 more
core   +1 more source

The fate of nitrogen in the Zarin-Gol River receiving trout farm effluent

Scientific Reports, 2023
This study investigated the Zarrin-Gol River ecosystem in Iran to trace organic matter in the food web and evaluate the impact of aquaculture farm effluent using stable isotopes of nitrogen (δ15N) and carbon (δ13C).
Altin Ghojoghi, Rasoul Ghorbani, Rahman Patimar, Abdolrassoul Salmanmahiny, Rahmat Naddafi, Abdolazim Fazel, Timothy D. Jardine   +6 more
doaj   +1 more source

NITROGEN ISOTOPIC FRACTIONATION IN INTERSTELLAR AMMONIA [PDF]

The Astrophysical Journal, 2010
Using the Green Bank Telescope (GBT), we have obtained accurate measurements of the $^{14}$N/$^{15}$N isotopic ratio in ammonia in two nearby cold, dense molecular clouds, Barnard~1 and NGC 1333. The $^{14}$N/$^{15}$N ratio in Barnard~1, $334 \pm 50$ (3$σ$), is particularly well constrained and falls in between the local interstellar medium/proto-solar
Lis, Darek C., Wootten, A., Gerin, Maryvonne, Roueff, Evelyne   +3 more
openaire   +4 more sources

Oxygen Isotope Analysis of Human Bone Phosphate Evidences Weaning Age in Archaeological Populations [PDF]

, 2015
Acknowledgements With special thanks to Jean-Jacques Hublin and the MPI-EVA; to Annabell Reiner (MPI-EVA) and Bernd Steinhilber (Universitat Tubingen) for technical support;and to the Deutscher Akademischer Austausch Dienst for financial support to KB ...
Alvarez, Ambrose, Anderson, Arifeen, Ayliffe, Ayliffe, Balasse, Balasse, Balasse, Balasse, Beaumont, Beresford, Bernard, Blaise, Brettell, Britton, Bryant, Bryant, Bryant, Bryant, Budd, Butte, Camin, Chenery, Clark, D'Angela, Dansgaard, Darling, Darling, Daux, Delgado Huertas, Dettman, Dettwyler, Dettwyler, Duijts, Eckardt, Ehleringer, Epstein, Evans, Evans, Evans, Evans, Fildes, Fogel, France, Fricke, Fricke, Fuller, Fuller, Fuller, Fuller, Fuller, Garn, Gat, Genoni, Gustafson, Halas, Hauber, Heller, Hoppe, Hoppe, Horta, Horta, Huelsemann, Iacumin, Jay, Jenkins, Kennedy, Kennedy, Klinken, Koch, Kohn, Kohn, Kohn, Kohn, Kolodny, Land, Levesque, Levin, Levinson, Lin, Longinelli, Longinelli, Longinelli, Longinelli, Longinelli, Longinelli, Luz, Mannino, Martin, Mays, Mays, Mays, Mekota, Montgomery, Müldner, Müldner, Nelson, Nielsen-Marsh, O'Neil, Pellegrini, Pellegrini, Podlesak, Polischuk, Pollard, Quinn, Reitsema, Rich-Edwards, Richards, Sellen, Sellen, Sharp, Sofaer Derevenski, Stuart-Williams, Sánchez Chillón, Tsutaya, Turner-Walker, Tütken, Tütken, Vennemann, Vitzthum, White, White, Widory, Wright, Wright, Yurtsever, Zanconato, Zazzo, Zazzo   +129 more
core   +1 more source

Tooth enamel nitrogen isotope composition records trophic position: a tool for reconstructing food webs

Communications Biology, 2023
Enamel-bound nitrogen isotopes in modern and fossil mammal teeth preserve dietary and trophic level information. This novel geochemical archive can be used to reconstruct trophic niche in ancient ecosystems.
Jennifer N. Leichliter, Tina Lüdecke, Alan D. Foreman, Nicolas Bourgon, Nicolas N. Duprey, Hubert Vonhof, Viengkeo Souksavatdy, Anne-Marie Bacon, Daniel M. Sigman, Thomas Tütken, Alfredo Martínez-García   +10 more
doaj   +1 more source