Results 241 to 250 of about 14,752 (295)

Tumor-associated macrophages promote ferroptosis resistance in glioblastoma by stimulating iron-loaded extracellular vesicle release. [PDF]

J Neurooncol
Sahu AP, Palsa K, Shenoy G, Slagle-Webb B, Connor JR.   +4 more
europepmc   +1 more source

Oxygen isotope composition of Mesoproterozoic (~1360 Ma) seawater constrained by clumped isotopes of North China limestones. [PDF]

Sci Adv
Li P, Hao F, He S, Chai H, Jiao Y, Gao Y, Zou H.   +6 more
europepmc   +1 more source

Shifts in Antarctic Intermediate Water properties coincide with atmospheric CO₂ rise across the Mid-Brunhes Event. [PDF]

Sci Adv
Tapia R, Ho SL, Nürnberg D, Meckler AN, Iizuka Y, Tiedemann R.   +5 more
europepmc   +1 more source

Iron isotope fractionation in groundwater

, 2016
Teutsch, N, von Gunten, U, Porcelli, D, Halliday, A   +3 more
openaire   +1 more source

Iron Isotopes

, 2011
International audienceAlthough less variable in abundances than carbon or oxygen stable isotopes, iron isotopes show analytically significant mass-dependent isotopic variations in nature. The geochemical community has investigated the range of Fe isotope
Joachim Reitner, Volker Thiel
core   +3 more sources

Neutron capture on Pt isotopes in iron meteorites and the Hf–W chronology of core formation in planetesimals

Earth and Planetary Science Letters, 2013
The short-lived 182Hf–182W isotope system can provide powerful constraints on the timescales of planetary core formation, but its application to iron meteorites is hampered by neutron capture reactions on W isotopes resulting from exposure to galactic ...
Thomas S Kruijer, Mario Fischer-Gödde, Thorsten Kleine   +2 more
exaly   +2 more sources

Iron stable isotopes track pelagic iron cycling during a subtropical phytoplankton bloom

Proceedings of the National Academy of Sciences of the United States of America, 2015
The supply and bioavailability of dissolved iron sets the magnitude of surface productivity for ∼40% of the global ocean. The redox state, organic complexation, and phase (dissolved versus particulate) of iron are key determinants of iron bioavailability
Michael J Ellwood, David A Hutchins, Maeve C Lohan   +2 more
exaly   +2 more sources

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Iron Isotope Biosignatures

Science, 1999
The 56 Fe/ 54 Fe of Fe-bearing phases precipitated in sedimentary environments varies by 2.5 per mil (δ 56 Fe values of +0.9 to −1.6 per mil). In contrast, the 56 Fe/ 54 Fe of Fe-bearing phases in igneous rocks from Earth
B L, Beard, C M, Johnson, L, Cox, H, Sun, K H, Nealson, C, Aguilar   +5 more
openaire   +2 more sources

Isotopic exchange of iron between iron chloride and iron cupferrate

The International Journal of Applied Radiation and Isotopes, 1964
Abstract Half-times of iron exchange in a homogeneous phase between iron cupferrate and iron chloride were measured. The experiments were accomplished in chloroform at temperatures ranging between 0° and −35°C.
A, ARROYO, M, CASABIANCA, M, CENDALES, S J, NASSIFF   +3 more
openaire   +2 more sources

Iron Isotope Systematics

Reviews in Mineralogy and Geochemistry, 2017
Iron is a ubiquitous element with a rich (i.e., complex) chemical behavior. It possesses three oxidation states, metallic iron (Fe), ferrous iron (Fe2+) and ferric iron (Fe3+). The distribution of these oxidation states is markedly stratified in the Earth.
Dauphas, Nicolas, John, Seth G., Rouxel, Olivier   +2 more
openaire   +1 more source