Results 31 to 40 of about 1,644,826 (290)

Quantifying Lithogenic Inputs to the Southern Ocean Using Long-Lived Thorium Isotopes

Frontiers in Marine Science, 2020
Thorium (Th) isotopes were applied to quantify the supply of lithogenic inputs from the Kerguelen Plateau to the Southern Ocean. The dissolved concentrations of 232Th and 230Th were measured following a novel pre-concentration method using the Nobias ...
Habacuc Pérez-Tribouillier, Habacuc Pérez-Tribouillier, Taryn L. Noble, Ashley T. Townsend, Andrew R. Bowie, Andrew R. Bowie, Zanna Chase   +6 more
doaj   +1 more source

Enrichment of 54Fe by Electromagnetic Isotope Separator (EMIS) [PDF]

مجله علوم و فنون هسته‌ای, 2014
Electromagnetic Isotopes Separator (EMIS) has been installed in Karaj since 1991 in order to separate isotopes of a wide range of elements. Iron is successfully separated. Iron element has four stable isotopes, 58Fe, 57Fe, 56Fe and 54Fe.
Z Asadollahi, M. R Ghasemi, A Hashemizadeh, P Sarabadani, H Bakhtiari, S. M Mohati, H Seyedi, H Sadri, M Sharbatdaran   +8 more
doaj  

Evaluation of Neutron Reactions on Iron Isotopes for CIELO and ENDF/B-VIII.0

, 2018
A new suite of evaluations for 54,56,57,58 Fe has been developed in the framework of the CIELO international collaboration. New resolved resonance ranges were evaluated for 54 Fe and 57 Fe, while modifications were applied to resonances in 56 Fe. The low
M. Herman, A. Trkov, R. Capote, G. Nobre, David A. Brown, R. Arcilla, Y. Danon, A. Plompen, S. Mughabghab, Q. Jing, Z. Ge, L. Tingjin, L. Hanlin, R. Xichao, L. Leal, B. V. Carlson, T. Kawano, M. Sin, S. Simakov, K. Guber   +19 more
semanticscholar   +1 more source

Recycled iron fuels new production in the eastern equatorial Pacific Ocean

Nature Communications, 2017
In the eastern equatorial Pacific, upwelling supplies nitrate in excess of iron relative to phytoplankton requirements. Here, using nitrate isotopes, the authors show that iron recycling in surface waters supports nitrate consumption, lowering surface ...
Patrick A. Rafter, Daniel M. Sigman, Katherine R. M. Mackey   +2 more
doaj   +1 more source

Distinct iron cycling in a Southern Ocean eddy

Nature Communications, 2020
Eddies are common ocean features that isolate large swaths of seawater, but it is unclear how they influence productivity of phytoplankton trapped inside.
Michael J. Ellwood, Robert F. Strzepek, Peter G. Strutton, Thomas W. Trull, Marion Fourquez, Philip W. Boyd   +5 more
doaj   +1 more source

Iron Composition of a Typical Loess-Paleosol Sequence in Northeast China

Agronomy
Iron isotope compositions, along with the partial extraction of iron in its various forms, can be utilized to investigate the complex interplay of iron migration and transformation with respect to iron isotope patterns.
Zhong-Xiu Sun, Si-Wei Liu, Ying-Ying Jiang   +2 more
doaj   +1 more source

Use of Ra isotopes to deduce rapid transfer of sediment-derived inputs off Kerguelen [PDF]

Biogeosciences, 2015
The Southern Ocean is known to be the largest high-nutrient, low-chlorophyll (HNLC) region of the global ocean due to iron limitation. However, a large phytoplankton bloom develops annually downstream of the Kerguelen Islands, a bloom which is sustained ...
V. Sanial, P. van Beek, B. Lansard, M. Souhaut, E. Kestenare, F. d'Ovidio, M. Zhou, S. Blain   +7 more
doaj   +1 more source

Iron incorporation and post-malaria anaemia. [PDF]

PLoS ONE, 2008
Iron supplementation is employed to treat post-malarial anaemia in environments where iron deficiency is common. Malaria induces an intense inflammatory reaction that stalls reticulo-endothelial macrophagal iron recycling from haemolysed red blood cells ...
Conor P Doherty, Sharon E Cox, Antony J Fulford, Steven Austin, David C Hilmers, Steven A Abrams, Andrew M Prentice   +6 more
doaj   +1 more source

Bulk properties of iron isotopes [PDF]

Physics of Atomic Nuclei, 2007
Nuclear level densities and radiative strength functions (RSFs) in 56Fe and 57Fe were measured using the 57Fe(3He, αγ) and 57Fe(3He, 3He′γ) reactions, respectively, at the Oslo Cyclotron Laboratory. A low-energy enhancement in the RSF below 4-MeV energy was observed. This finding cannot be explained by common theoretical models. In a second experiment,
Algin, E., Schiller, A., Voinov, A., Agvannluvsan, U., Belgya, T., Bernstein, L., Brune, C., Chankova, R., Garrett, P., Grimes, S., Guttormsen, M., Hjorth-Jensen, M., Hornish, M., Johnson, C., Massey, T., Mitchell, G., Rekstad, J., Siem, S., Younes, W.   +18 more
openaire   +1 more source

Iron absorption from supplements is greater with alternate day than with consecutive day dosing in iron-deficient anemic women

Haematologica, 2020
In iron-depleted women without anemia, oral iron supplements induce an increase in serum hepcidin (SHep) that persists for 24 hours, decreasing iron absorption from supplements given later on the same or next day.
Nicole U. Stoffel, Christophe Zeder, Gary M. Brittenham, Diego Moretti, Michael B. Zimmermann   +4 more
doaj   +1 more source