Results 31 to 40 of about 1,225 (202)

Multi-collector Inductively Coupled Plasma Mass Spectrometry: New Developments and Basic Concepts for High-precision Measurements of Mass-dependent Isotope Signatures

CHIMIA, 2022
Due to the development of multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) around 25 years ago, the isotopes of a large range of elements (masses from Li to U) are now analyzed with high enough precision and accuracy to resolve ...
Nicolas Greber, Kirsten van Zuilen
doaj   +1 more source

Cosmochemistry: Understanding the Solar System through analysis of extraterrestrial materials

, 2011
Cosmochemistry is the chemical analysis of extraterrestrial materials. This term generally is taken to mean laboratory analysis, which is the cosmochemistry gold standard because of the ability for repeated analysis under highly controlled conditions ...
Glenn J. MacPherson, Mark H. Thiemens
core   +1 more source

Equitable Access, Open Science, and the Future of Publishing in Geochemistry and Cosmochemistry

The landscape of academic publishing, including in geochemistry and cosmochemistry, is evolving toward greater openness and accessibility. This editorial outlines the vision for Advances in Geochemistry and Cosmochemistry, a diamond open access journal ...
Tartèse, Romain, Advances In Geochemistry And Cosmochemistry Editorial Board, The Inuagural, Klöcking, Marthe, Kiseeva, Ekaterina S., Mallik, Ananya, Fonseca, Raúl O.C., Matthews, Simon W., Tartèse, Romain; id_orcid, Millet, Marc-Alban, Marin-Carbonne, Johanna, Darling, James R., Namur, Olivier, Ickert, Ryan B., Tierney, Jessica E., Pourret, Olivier, Dahrén, Börje, Torres, Mark A., Dahrén, Börje,, Kiseeva, Ekaterina, S, Matthews, Simon, W, Ickert, Ryan, B, Tierney, Jessica, E, Darling, James, R, Torres, Mark, A   +23 more
core   +2 more sources

The 40K‐K dating system: 1. Improving data interpretation using new model calculations

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2187-2200, September 2026.
Abstract The 40K‐K cosmic‐ray exposure (CRE) dating system offers a promising method for determining exposure ages of iron meteorites by combining the radioactive cosmogenic 40K with the stable cosmogenic isotopes 39K and 41K. However, earlier applications relied on semi‐empirical production models and inconsistent analytical data sets, limiting their ...
Farshid Nozarian, Suzette Timmerman, Ingo Leya   +2 more
wiley   +1 more source

Advanced aqueous alteration in primitive meteorites: Micro‐ to nanoscale studies of CR1 iron sulfides

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1806-1825, August 2026.
Abstract This study documents micro‐ to nanoscale observations of primary nebular and secondary parent body iron sulfides in the CR1 GRO 95577. Despite the extensive alteration of the bulk sample, some primary sulfides managed to avoid alteration, having originally formed in the solar nebula during chondrule formation by either fission‐sulfidization or
S. A. Singerling
wiley   +1 more source

Biogeochemical impact of nickel and urea in the great oxidation event

Communications Earth & Environment
The Great Oxidation Event marks the first substantial increase in atmospheric oxygen on Earth. Despite the oxygenic photosynthesis that emerged hundreds of million years before this event, the specific biogeochemical mechanisms responsible for ...
Dilan M. Ratnayake, Ryoji Tanaka, Eizo Nakamura   +2 more
doaj   +1 more source

Potassium isotopic compositions and exposure ages of evolved and silica‐rich achondrites

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 2140-2162, August 2026.
Abstract Some of the oldest igneous rocks in the Solar System include evolved and silica‐rich achondrites that originate from parent bodies less than 1000 km in diameter, referred to as planetesimals. While Earth was initially in a molten state and required continental crust formation and plate tectonics to generate andesite bulk compositions, evolved ...
Z. Vaci, Z. Tian, P. Koefoed, M. Habermann, M. Humayun, K. Ziegler, H. Busemann, D. Krietsch, J. M. D. Day, K. Wang   +9 more
wiley   +1 more source

The FANCD2–FANCI complex is recruited to DNA interstrand crosslinks before monoubiquitination of FANCD2

Nature Communications, 2016
FANCD2 and FANCI are essential components of the Fanconi anaemia DNA damage repair pathway. Here the authors present the cryo-EM structure of the FANCD2-FANCI complex, providing insight into how the complex is recruited to stalled replication forks.
Chih-Chao Liang, Zhuolun Li, David Lopez-Martinez, William V. Nicholson, Catherine Vénien-Bryan, Martin A. Cohn   +5 more
doaj   +1 more source

Cosmic Dust Flux During the Quaternary: The Record of Large Scoriaceous and Unmelted Micrometeorites From the Transantarctic Mountains Collection

Journal of Geophysical Research: Planets, Volume 131, Issue 7, July 2026.
Abstract We estimate the cosmic dust flux to Earth through the study of rare micrometeorites that preserve part of their precursor features during atmospheric entry heating, namely unmelted and scoriaceous subtypes. Combining high‐precision mass balance measurements, X‐ray computed microtomography and scanning electron microscopy, we studied mass, size
S. Ottaviani, L. Folco, M. D. Suttle, R. Repič, L. Mancini, T. Battiston, S. Iannini Lelarge, M. Masotta   +7 more
wiley   +1 more source

Recent developments in isotope-ratio mass spectrometry for geochemistry and cosmochemistry [PDF]

, 2016
Mass spectrometry is fundamental to measurements of isotope ratios for applications in isotope geochemistry, geochronology, and cosmochemistry. Magnetic-sector mass spectrometers are most common because these provide the best precision in isotope ratio ...
Ireland, Trevor
core   +1 more source