Results 21 to 30 of about 14,761 (290)

Novel Insights into Marine Iron Biogeochemistry from Iron Isotopes

Annual Review of Marine Science, 2023
The micronutrient iron plays a major role in setting the magnitude and distribution of primary production across the global ocean. As such, an understanding of the sources, sinks, and internal cycling processes that drive the oceanic distribution of iron is key to unlocking iron's role in the global carbon cycle and climate, both today and in the ...
Jessica N, Fitzsimmons, Tim M, Conway
openaire   +2 more sources

Empirical evidence for the fractionation of carbon isotopes between diamond and iron carbide from the Earth’s mantle [PDF]

, 2014
S.M. would like to thank the Engineering and Physical Sciences Research Council, the Diamond Trading Company, and the Department of Physical Sciences, The Open University (UK) for financial support during his time as a PhD student at University College ...
Krispin, Catherine, Crispin, K., Jones, A.P., Verchovsky, Alexander, Guillermier, C., Beard, Andrew, Milledge, H.J., Beard, Andy, Verchovsky, A.B., Jones, Adrian, Franchi, I.A., Milledge, H Judith, Mikhail, Sami, Guillermier, Christalle, Mikhail, S., Beard, Andrew D., Franchi, Ian   +16 more
core   +1 more source

Use of three isotopes to calibrate human bone radiocarbon determinations from Kainapirina (SAC), Watom Island, Papua New Guinea [PDF]

, 2005
In archaeological dating, the greatest confidence is usually placed upon radiocarbon results of material that can be directly related to a defined archaeological event.
Green, Roger, Petchey, Fiona
core   +1 more source

Iron isotopes and the redox evolution of Ediacaran sediments

Comptes Rendus. Géoscience, 2021
The Ediacaran age (ca. 570 Ma) Shuram excursion, a ca. $12‰$ depletion in $\delta ^{13}\mathrm{C}_{\mathrm{carb}}$, may record a dramatic oxidation of marine sediments associated with a reorganization of Earth’s carbon cycle closely preceding the rise of
Moynier, Frederic, Fike, David A., Menard, Gabrielle, Fischer, Woodward W., Grotzinger, John P., Agranier, Arnaud   +5 more
doaj   +1 more source

SQUID-SIMS is a useful approach to uncover primary signals in the Archean sulfur cycle [PDF]

, 2014
The Agouron Institute and National Aeronautic and Space Administration Exobiology Award NNX09AM91G supported this work.Many aspects of Earth's early sulfur cycle, from the origin of mass-anomalous fractionations to the degree of biological participation,
Guan, Yunbin, Woodward W. Fischer, Fike, David A., Fike, David A, Jena E. Johnson, Raub, Timothy D, David A. Fike, Fischer, Woodward W., Johnson, Jena E, Eiler, John M, Timothy D. Raub, Raub, Timothy D., Yunbin Guan, Kirschvink, Joseph L., Johnson, Jane E., Joseph L. Kirschvink, John M. Eiler, Fischer, Woodward W, Kirschvink, Joseph L, Eiler, John M.   +19 more
core   +1 more source

Analyzing the Quenchable Iron Pool in Murine Macrophages by Flow Cytometry

Bio-Protocol, 2020
Tissue-resident macrophages are pivotal for a tightly-regulated iron metabolism at a cellular and systemic level, since subtle iron alterations increase the susceptibility for microbial infections or drive multiple diseases. However, research on cellular
Michael Riedelberger, Karl Kuchler
doaj   +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

Fractionation of iron species and iron isotopes in the Baltic Sea euphotic zone [PDF]

Biogeosciences, 2010
To indentify sources and transport mechanisms of iron in a coastal marine environment, we conducted measurements of the physiochemical speciation of Fe in the euphotic zone at three different locations in the Baltic Sea.
J. Gelting, E. Breitbarth, B. Stolpe, M. Hassellöv, J. Ingri   +4 more
doaj   +1 more source

Ice sheets as a significant source of highly reactive nanoparticulate iron to the oceans [PDF]

, 2014
The Greenland and Antarctic Ice Sheets cover ~\n10% of global land surface, but are rarely considered as active components of the global iron cycle. The ocean waters around both ice sheets harbour highly productive coastal ecosystems, many of which are ...
Peter J. Statham, Nienow, Peter, Wadham, Jemma L., Statham, Peter J., Lee, Katherine, Telling, Jon, Peter Nienow, Jemma L. Wadham, Katherine Lee, Benning, Liane G., Andrew Tedstone, Hawkings, Jon R., Tranter, Martyn, Raiswell, Rob, Jon Telling, Rob Raiswell, Tedstone, Andrew J, Tedstone, Andrew, Jon R. Hawkings, Martyn Tranter, Liane G. Benning   +20 more
core   +1 more source

Multiple sulfur isotopes of iron sulfides from thick greigite-bearing sediments indicate incomplete anaerobic oxidation and possible leakage of methane [PDF]

, 2023
Multiple sulfur isotopes of iron sulfides from the South Yellow Sea sediments in the paper "Multiple sulfur isotopes of iron sulfides from thick greigite-bearing sediments indicate incomplete anaerobic oxidation and leakage of coastal methane".
Gang-Jian Wei (14123106), Jianghao Bai (14630624), Xi Mei (14630569), Jianxing Liu (14630602), Jiarui Lin (14630603), Xiaoxiao Yu (9181016), Mang Lin (4236190)   +6 more
core   +1 more source