Results 141 to 150 of about 85,610 (304)

Prebiotic Organic Chemistry of Diketopiperazines

Asian Journal of Organic Chemistry, Volume 15, Issue 4, April 2026.
Diketopiperazines (DKPs) are considered essential in many life forms, but their prebiotic importance has not been fully understood. This review aims to discuss prebiotic organic chemistry for experimentally and computationally simulated reactions involving DKPs. ABSTRACT Even though the significance of amino acids and polypeptides is well recognized in
Jun Ohata
wiley   +1 more source

3D Local Measurement of the Magnetic Field Strength Inside Martian Meteorite NWA 7034 by Polarimetric Neutron Imaging

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract We present a new method for paleomagnetic investigations, polarized neutron imaging, a non‐destructive magnetic imaging technique benefiting from the high penetration depth and spin of the neutron allowing spatial characterization of the magnetic field within a sample.
Cédric Holme Qvistgaard, Estrid Buhl Naver, Alexander Wolfertz, Vahid Karimi, Takenao Shinohara, Joseph Don Parker, Tetsuya Kai, Hirotoshi Hayashida, Søren Schmidt, Luise Theil Kuhn   +9 more
wiley   +1 more source

Robust Directional Analysis of Magnetic Microscopy Images Using Non‐Linear Inversion and Iterative Euler Deconvolution

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract In paleomagnetism, bulk measurements of entire samples have traditionally been used to characterize remanent magnetization. While effective, this approach provides only a general directional estimate and cannot resolve spatial variability or magnetization at the grain scale.
Gelson F. Souza‐Junior, Leonardo Uieda, Ricardo I. F. Trindade, Roger R. Fu, Ualisson D. Bellon, Yago M. Castro   +5 more
wiley   +1 more source

Mantle Dynamic Topography of the Fringing Oceanic Basins of Antarctica

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Dynamic mantle processes are known to influence oceanic basins with implications for ocean circulation and climate. This study exploits an interdisciplinary approach to probe present‐day mantle and lithosphere beneath Antarctica's fringing oceanic basins to better understand sub‐crustal processes and implications for the continental realm.
A. C. A. Dunn, N. J. White, R. Larter, P. L. Slay, M. C. Holdt   +4 more
wiley   +1 more source

Water Reservoirs in Small Planetary Bodies: Meteorites, Asteroids, and Comets

Space Science Reviews, 2018
C. Alexander, K. McKeegan, K. Altwegg
semanticscholar   +1 more source

In Situ Carbonation of Sedimentary and Igneous Rocks of Ultramafic Composition in Jezero Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Over 3.5 years of exploration in Jezero Crater, the Perseverance rover has explored several geological units of diverse origins and natures, performing multi‐technique remote analyses of the chemistry and mineralogy of rocks with the SuperCam instrument suite.
E. Clavé, O. Beyssac, P. Beck, C. Royer, L. Mandon, N. Mangold, O. Forni, E. Dehouck, C. Bedford, A. Udry, S. Schröder, S. Bernard, C. Quantin‐Nataf, M. Loche, J. Aramendia, A. Brown, G. Caravaca, E. Cardarelli, L. Coloma, S. A. Connell, T. Fouchet, J. R. Johnson, G. Lopez‐Reyes, J. M. Madariaga, J. A. Manrique, S. Maurice, P.‐Y. Meslin, S. Le Mouélic, A. M. Ollila, P. Pilleri, C. Pilorget, K. Rammelkamp, F. Seel, J. I. Simon, U. Wolf, A. Zastrow, S. Clegg, O. Gasnault, R. C. Wiens, A. Cousin   +39 more
wiley   +1 more source

Deciphering the “Missing Xenon Paradox” in Celestial Bodies: A Multifaceted Perspective Toward Demystifying This Enigma

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Xenon (Xe) is a heavy noble gas with intriguing chemical properties, such as having several stable isotopes and the ability to form compounds under extreme conditions. Despite the predictions based on cosmochemical models that suggest xenon should be relatively abundant in planetary reservoirs, empirical data indicate a significant depletion ...
Avinash Kumar Both, Avradip Ghosh, Chin Li Cheung   +2 more
wiley   +1 more source

Thermal Evolution of the Sulfur‐Rich, Small Terrestrial Planetary Core as Inferred From the Experimental Study of the Fe‐S‐O‐H System

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The cores of rocky planets, including the Earth, are believed to contain light elements such as silicon, oxygen, sulfur, hydrogen, and carbon. Amongst them, sulfur appears to be rich in the cores of small terrestrial bodies like Mars and Ganymede. To understand the evolution of sulfur‐rich cores in the presence of other light elements, we have
Jeongmin Lee, Jaeyoon Keum, Taehyun Kim, Chanbi Lee, Stella Chariton, Vitali Prakapenka, Nico Giordano, Byungdal So, Huijeong Hwang, Yongjae Lee   +9 more
wiley   +1 more source

Amapari Marker Band Metal‐Enrichments: Potential Mechanisms and Implications for Surface and Subsurface Water and Weathering in Gale Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract NASA's Curiosity rover is exploring a 5 km tall sedimentary mound that is hypothesized to record the transition from a warm and wet (phyllosilicate‐rich) to a cold and drier (sulfate‐rich) Mars. Evidence of magnesium sulfate‐bearing rock has shown that Curiosity has crossed through this phyllosilicate‐sulfate transition.
P. J. Gasda, E. S. Kite, L. M. Thompson, C. Mondro, W. E. Dietrich, C. M. Weitz, B. Tutolo, W. H. Farrand, E. Hausrath, A. Cowart, N. L. Lanza, K. W. Lewis, S. Gupta, A. Roberts, W. Goetz, H. E. Newsom, L. Crossey, J. Lightholder, C. Hardgrove, J. Schieber, S. P. Schwenzer, S. J. VanBommel, S. Schröder, C. D. O'Connell‐Cooper, D. Das, D. Rubin, W. Rapin, T. F. Bristow, E. Rampe, P. D. Archer Jr, C. Seeger, G. Caravaca, J. R. Johnson, S. Le Mouélic, J. A. Grant, J. Davis, J. Lasue, A. Yingst, A. B. Bryk, M. P. Lamb, W. W. Fischer, C. House, E. Dehouck, A. Essunfeld, R. Milliken, R. Sheppard, M. Minitti, D. Ming, S. Simpson, J. Frydenvang, R. M. E. Williams, R. Arvidson, R. Gellert, O. Gasnault, S. M. Clegg, D. Delapp, A. R. Vasavada, A. Fraeman   +57 more
wiley   +1 more source

Rockwood Meteorite [PDF]

Science, 1887
openaire   +2 more sources