Article
Geosciences, Multidisciplinary
D. Konig, T. M. Conway, D. S. Hamilton, A. Tagliabue
Summary: This study uses a global ocean biogeochemical model with active Fe isotope cycling to investigate the impact of anthropogenic Fe sources on surface ocean dFe and δFe-56(diss). The results show that the response of dFe, δFe-56(diss), and primary productivity is variable and regulated by the biogeochemical regime, rather than following the footprint of atmospheric deposition. The study also finds that while δFe-56(diss) can trace anthropogenic input, its response is attenuated by fractionation during phytoplankton uptake, but amplified by other isotopically-light Fe sources.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Multidisciplinary Sciences
Changle Wang, Maxwell A. Lechte, Christopher T. Reinhard, Dan Asael, Devon B. Cole, Galen P. Halverson, Susannah M. Porter, Nir Galili, Itay Halevy, Robert H. Rainbird, Timothy W. Lyons, Noah J. Planaysky
Summary: Earth's surface has undergone a prolonged oxidation process, which has had a profound impact on the biosphere. Research shows that the oxygen levels in shallow marine environments were low in the Proterozoic era and gradually increased afterwards, coinciding with the rise of complex eukaryotic ecosystems.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geochemistry & Geophysics
Aiguo Dong, Zhilei Sun, Brian Kendall, Gareth Izon, Hong Cao, Zhihong Li, Xiaoming Ma, Xijie Yin, Zhen Qiu, Xiang-kun Zhu, Andrey Bekker, Simon W. Poulton
Summary: This study investigates the formation mechanism of post-GOE deep-water Fe-Si precipitates, suggesting that the mineralogical layers may have originated from biologically mediated ferrihydrite precipitation and abiotic precipitation of opal-A, indicating a potential role of diffuse hydrothermal fluid flow.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geochemistry & Geophysics
Andy W. Heard, Andrey Bekker, Alex Kovalick, Harilaos Tsikos, Thomas Ireland, Nicolas Dauphas
Summary: This study presents geochemical and iron isotopic data for iron-rich stromatolites deposited in the Griquatown Iron Formation in South Africa around 2.46-2.43 billion years ago. The data suggests that the iron delivered by deep upwelling currents underwent quantitative oxidation, likely due to cyanobacterial communities inhabiting the stromatolites and producing local oxygen enrichments.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Editorial Material
Genetics & Heredity
Jackson G. Thorp, Zachary F. Gerring, Eske M. Derks
Summary: Identifying genetic variants associated with binge-eating disorder (BED) risk scores using machine learning provides important insights into its etiology and potential intervention targets. This study highlights the pathological role of heme metabolism in BED, overcoming the limitations of under-reporting clinical diagnoses.
Article
Environmental Sciences
D. Konig, T. M. Conway, M. J. Ellwood, W. B. Homoky, A. Tagliabue
Summary: Iron isotopes in the ocean are crucial in studying the iron cycle, but the complexity of various external sources and fractionation processes can complicate the interpretation of observations. By incorporating iron isotopes into a global ocean biogeochemical model, research finds that distinct external source endmembers and isotopic fractionation are essential for explaining the distribution of dissolved iron isotopes, with the water column's δFe-56(diss) distribution influenced by regional imbalance of remineralization and abiotic removal processes.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Geochemistry & Geophysics
Bastien Soens, Stepan M. Chernonozhkin, Claudia Gonzalez de Vega, Frank Vanhaecke, Matthias van Ginneken, Philippe Claeys, Steven Goderis
Summary: Chemical compositions and possible precursor mineralogy of achondritic micrometeorites from Antarctica were studied. The potential origins of these micrometeorites were inferred through oxygen isotopes and iron isotopes data. The study results demonstrate the overall rarity and similarities of these achondritic micrometeorites with those from other collections.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Multidisciplinary Sciences
William B. Homoky, Tim M. Conway, Seth G. John, Daniela Konig, FeiFei Deng, Alessandro Tagliabue, Rachel A. Mills
Summary: This study reveals that lithogenic colloid production is the primary mechanism driving iron supply in sediment porewaters in the South Atlantic, which differs from the prevailing understanding. Iron colloids, closely associated with organic carbon abundance, may form a large exchangeable reservoir of organo-mineral Fe colloids in oxic ocean sediments.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Physics, Multidisciplinary
D. S. Ahn, J. Amano, H. Baba, N. Fukuda, H. Geissel, N. Inabe, S. Ishikawa, N. Iwasa, T. Komatsubara, T. Kubo, K. Kusaka, D. J. Morrissey, T. Nakamura, M. Ohtake, H. Otsu, T. Sakakibara, H. Sato, B. M. Sherrill, Y. Shimizu, T. Sumikama, H. Suzuki, H. Takeda, O. B. Tarasov, H. Ueno, Y. Yanagisawa, K. Yoshida
Summary: The most neutron-rich sodium nucleus observed so far, 39Na, was discovered at the RIKEN Nishina Center Radioactive Isotope Beam Factory. The study confirms the particle stability of 39Na and provides new key information for understanding nuclear binding and structure under extremely neutron-rich conditions. This discovery has significant implications for nuclear models and theories predicting the neutron dripline and sheds light on the nuclear shell property of 39Na at the neutron number N = 28.
PHYSICAL REVIEW LETTERS
(2022)
Article
Hematology
Cornelia Speich, Rita Wegmueller, Gary M. Brittenham, Christophe Zeder, Colin Cercamondi, Daniela Buhl, Andrew M. Prentice, Michael B. Zimmermann, Diego Moretti
Summary: This study presents the first measurements of long-term iron absorption and loss during iron supplementation in African children using a stable isotope of iron (Fe-57). The results showed that both iron absorption and loss significantly increased during the supplementation period, with most of the absorbed iron being lost.
BRITISH JOURNAL OF HAEMATOLOGY
(2021)
Article
Geochemistry & Geophysics
Nicole X. Nie, Nicolas Dauphas, Esen E. Alp, Hao Zeng, Corliss K. Sio, Justin Y. Hu, Xi Chen, Sarah M. Aarons, Zhe Zhang, Heng-Ci Tian, Da Wang, Kelsey B. Prissel, Jennika Greer, Wenli Bi, Michael Y. Hu, Jiyong Zhao, Anat Shahar, Mathieu Roskosz, Fang-Zhen Teng, Michael J. Krawczynski, Philipp R. Heck, Frank S. Spear
Summary: This study determined equilibrium Fe isotope fractionation factors between common rock-forming minerals using a comparative approach and demonstrated their applications in Earth and planetary sciences. The presence of Fe3+ in minerals affects the ordering of fractionation factors, and the effect of the Fe3+/Σ Fe ratio on fractionation factors can be evaluated.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Yu-Han Qi, Ying-Zeng Gong, Fei Wu, Ying Lu, Wenhan Cheng, Fang Huang, Hui-Min Yu
Summary: The study of V behavior during chemical weathering provides valuable insights into V isotope compositions of weathered upper continental crust and river water, helping to understand the transfer of V from the land to the ocean.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geochemistry & Geophysics
Monica Sanchez-Roman, Luis Gibert, Juan Diego Martin-Martin, Kirsten van Zuilen, Victoriano Pineda-Gonzalez, Pieter Vroon, Sylvie Bruggmann
Summary: This study investigates the environmental and biogeochemical conditions under which dolomite precipitated in a sabkha/salina environment. The results reveal that the dolomite formation is influenced by microbial activity in saline environments, indicating the geochemistry of the depositional environment.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Engineering, Environmental
Kai Liu, Sherry L. Schiff, Lingling Wu, Lewis A. Molot, Jason J. Venkiteswaran, Michael J. Paterson, Richard J. Elgood, Jackson M. Tsuji, Josh D. Neufeld
Summary: Stable Fe isotopes in freshwater systems, especially in meromictic lakes, have recently been measured. This study focuses on two small dimictic boreal shield headwater lakes and reveals the large fractionations of 556Fe in dissolved, particulate, and sediment Fe, which have implications for biogeochemical cycling and acquisition of Fe by cyanobacteria in Earth's early ferruginous oceans.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Prachi Joshi, Matthew S. Fantle, Jonathan Boualavong, Christopher A. Gorski
Summary: This study analyzed the recrystallization process of iron oxide under Fe2+ catalysis through experiments and simulations. It found that partial back-reaction may affect the recrystallization rate, indicating that the impact of Fe2+-catalyzed recrystallization might be less extensive than previously thought and has a limited effect on proxy archives in the rock record.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Physics, Nuclear
M. Thoennessen
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2015)
Article
Physics, Nuclear
J. K. Smith, T. Baumann, J. Brown, P. A. DeYoung, N. Frank, J. Hinnefeld, Z. Kohley, B. Luther, B. Marks, A. Spyrou, S. L. Stephenson, M. Thoennessen, S. J. Williams
Article
Physics, Nuclear
M. D. Jones, N. Frank, T. Baumann, J. Brett, J. Bullaro, P. A. De Young, J. E. Finck, K. Hammerton, J. Hinnefeld, Z. Kohley, A. N. Kuchera, J. Pereira, A. Rabeh, W. F. Rogers, J. K. Smith, A. Spyrou, S. L. Stephenson, K. Stiefel, M. Tuttle-Timm, R. G. T. Zegers, M. Thoennessen
Article
Physics, Nuclear
A. N. Kuchera, A. Spyrou, J. K. Smith, T. Baumann, G. Christian, P. A. DeYoung, J. E. Finck, N. Frank, M. D. Jones, Z. Kohley, S. Mosby, W. A. Peters, M. Thoennessen
Review
Physics, Nuclear
M. Thoennessen
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2016)
Article
Physics, Nuclear
J. K. Smith, T. Baumann, D. Bazin, J. Brown, P. A. DeYoung, N. Frank, M. D. Jones, Z. Kohley, B. Luther, B. Marks, A. Spyrou, S. L. Stephenson, M. Thoennessen, A. Volya
Review
Physics, Nuclear
M. Thoennessen
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2017)
Review
Physics, Nuclear
M. Thoennessen
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2018)
Review
Physics, Nuclear
M. Thoennessen
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2019)
Article
Multidisciplinary Sciences
Y. Kondo, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, F. Delaunay, A. Delbart, Q. Deshayes, Zs. Dombradi, C. A. Douma, A. Ekstrom, Z. Elekes, C. Forssen, I. Gasparic, J. -M. Gheller, J. Gibelin, A. Gillibert, G. Hagen, M. N. Harakeh, A. Hirayama, C. R. Hoffman, M. Holl, A. Horvat, A. Horvath, J. W. Hwang, T. Isobe, W. G. Jiang, J. Kahlbow, N. Kalantar-Nayestanaki, S. Kawase, S. Kim, K. Kisamori, T. Kobayashi, D. Koerper, S. Koyama, I. Kuti, V. Lapoux, S. Lindberg, F. M. Marques, S. Masuoka, J. Mayer, K. Miki, T. Murakami, M. Najafi, T. Nakamura, K. Nakano, N. Nakatsuka, T. Nilsson, A. Obertelli, K. Ogata, F. de Oliveira Santos, N. A. Orr, H. Otsu, T. Otsuka, T. Ozaki, V. Panin, T. Papenbrock, S. Paschalis, A. Revel, D. Rossi, A. T. Saito, T. Y. Saito, M. Sasano, H. Sato, Y. Satou, H. Scheit, F. Schindler, P. Schrock, M. Shikata, N. Shimizu, Y. Shimizu, H. Simon, D. Sohler, O. Sorlin, L. Stuhl, Z. H. Sun, S. Takeuchi, M. Tanaka, M. Thoennessen, H. Toernqvist, Y. Togano, T. Tomai, J. Tscheuschner, J. Tsubota, N. Tsunoda, T. Uesaka, Y. Utsuno, I. Vernon, H. Wang, Z. Yang, M. Yasuda, K. Yoneda, S. Yoshida
Summary: Subjecting a physical system to extreme conditions is a common method to gain a better understanding of its organization and structure. The investigation of isotopes with different neutron-to-proton ratios than stable nuclei is an important test for nuclear-structure theories. This study reports the first observation of the decay of O-28 and 27O isotopes and compares their decay energies with theoretical models. The results have implications for the understanding of nuclear structure.
Article
Physics, Nuclear
A. N. Kuchera, D. Bazin, T. Phan, J. A. Tostevin, M. Babo, T. Baumann, P. C. Bender, M. Bowry, J. Bradt, J. Brown, P. A. DeYoung, B. Elman, J. E. Finck, A. Gade, G. F. Grinyer, M. D. Jones, B. Longfellow, E. Lunderberg, T. H. Redpath, W. F. Rogers, K. Stiefe, M. Thoennessen, D. Votaw, D. Weisshaar, K. Whitmore, R. B. Wiringa
Summary: This study investigates nucleon removal reactions and validates the models used to calculate the removal reaction cross sections. Three different nucleon removal reactions were performed and the partial cross sections to individual final states were determined by detecting the residual nuclei in coincidence with gamma rays. Comparison between measured and calculated cross sections reveals that the theoretical description of the removal process is in better agreement with the data when removing weakly bound nucleons.
Article
Physics, Nuclear
D. Votaw, P. A. DeYoung, T. Baumann, A. Blake, J. Boone, J. Brown, D. Chrisman, J. E. Finck, N. Frank, J. Gombas, P. Gueye, J. Hinnefeld, H. Karrick, A. N. Kuchera, H. Liu, B. Luther, F. Ndayisabye, M. Neal, J. Owens-Fryar, J. Pereira, C. Persch, T. Phan, T. Redpath, W. F. Rogers, S. Stephenson, K. Stiefel, C. Sword, A. Wantz, M. Thoennessen
Article
Physics, Nuclear
C. Sword, J. Brett, T. Baumann, B. A. Brown, N. Frank, J. Herman, M. D. Jones, H. Karrick, A. N. Kuchera, M. Thoennessen, J. A. Tostevin, M. Tuttle-Timm, P. A. DeYoung
Article
Physics, Nuclear
M. D. Jones, K. Fossez, T. Baumann, P. A. DeYoung, J. E. Finck, N. Frank, A. N. Kuchera, N. Michel, W. Nazarewicz, J. Rotureau, J. K. Smith, S. L. Stephenson, K. Stiefel, M. Thoennessen, R. G. T. Zegers
Article
Physics, Nuclear
M. D. Jones, T. Baumann, J. Brett, J. Bullaro, P. A. DeYoung, J. E. Finck, N. Frank, K. Hammerton, J. Hinnefeld, Z. Kohley, A. N. Kuchera, J. Pereira, A. Rabeh, J. K. Smith, A. Spyrou, S. L. Stephenson, K. Stiefel, M. Tuttle-Timm, R. G. T. Zegers, M. Thoennessen