Results 81 to 90 of about 67,364 (304)
Russian meteorite of the Bronze Age (rock record) [PDF]
Archaeoastronomy and Ancient Technologies, 2014 This paper presents the results of the study of petroglyphs found in the quartzite grotto near the Skelnovsky small village in the Northern Black Sea in the South of Russia. The aim of the study was the analysis and interpretation of the Early Bronze Age
Vodolazhskaya, L.N., Nevsky, M.Yu.
doaj +1 more source
Proceedings of the National Academy of Sciences, 2011 Primitive meteorites, interplanetary dust particles, and comets contain dust grains that formed around stars that lived their lives before the solar system formed. These remarkable objects have been intensively studied since their discovery a little over twenty years ago and they provide samples of other stars that can be studied in the laboratory in ...
openaire +3 more sources
d‐amino acids: new functional insights
The FEBS Journal, EarlyView.This review explores recent advances in understanding d‐amino acids (d‐AAs) and their pivotal roles across organisms, from plants to humans. d‐AAs have been implicated in key physiological processes, including cancer, inflammation, immune regulation, kidney disease, diabetes, and nervous system function.
Loredano Pollegioni +5 more
wiley +1 more source
Phaetoni langemine: kreeka-rooma geomüüt meteoriidi mõju mälestuse säilitajana Baieris (Kagu-Saksamaa) [PDF]
Mäetagused, 2011 Arguing from a critical reading of the text, and scientific evidence on the ground, the authors show that the myth of Phaethon – the delinquent celestial charioteer – remembers the impact of a massive meteorite that hit the Chiemgau region in Bavaria ...
Barbara Rappenglück +6 more
doaj
Geostandards and Geoanalytical Research, EarlyView.Key Points A stoichiometric calibration method for dual‐energy computed tomography allows non‐destructive characterisation of materials. Different acquisition settings and three different scanners were tested, characterising three rocks of known composition. Comparison of measurement results reveals the key parameters to be considered to perform useful
Margherita Martini +7 more
wiley +1 more source
Geostandards and Geoanalytical Research, EarlyView.Key Points PEEK tubing has been observed to adsorb Pd and Pt ions, resulting in significantly reduced recoveries of Pd and Pt elements. HPA‐S provides a more effective dissolution for meteorite samples than Carius tube digestion, resulting in higher mass fractions for PGE.
Yuling Zeng +2 more
wiley +1 more source
Mechano-chemical synthesis of ammonia and acetic acid from inorganic materials in water
Green Processing and Synthesis, 2019 A mechano-chemical reaction formed by a simple high-energy ball milling was applied to simulate the synthesis of ammonia and organic precursors from common inorganic materials that occurred on early Earth.
Kugimiya Koichi +3 more
doaj +1 more source
Geostandards and Geoanalytical Research, EarlyView.Key Points Synchrotron nano‐imaging is necessary to locate elemental nanophases. Trace metal quantification requires high sensitivity nano‐XRF. Trace metal speciation relies on nano‐XANES using nano‐XRF. This chapter (Nano‐Imaging for Advanced X‐ray Fluorescence and Absorption Spectroscopy Applications) is a contribution to the Geostandards and ...
Alexandre S. Simionovici +1 more
wiley +1 more source
Meteoritics &Planetary Science, Volume 60, Issue 3, Page 392-421, March 2025.Abstract The Calcalong Creek lunar meteorite is a regolith breccia with a lithologically diverse array of clasts set in a glassy, highly vesicular matrix. Here, we present a comprehensive new analysis of the meteorite. Comparisons to remote sensing data, lunar sample lithologies, and lunar sample ages indicate that it was likely sourced from regolith ...
B. H. Oliveira +6 more
wiley +1 more source
, 1998 This handbook of Shock-Metamorphic Effects in Terrestrial Meteorite Impact Structures emphasizes terrestrial impact structures, field geology, and particularly the recognition and petrographic study of shock-metamorphic effects in terrestrial rocks ...
B. French
semanticscholar +1 more source