Results 31 to 40 of about 20,629 (247)
Swiss Journal of Geosciences, 2023 The ~ 10 km2 strewn field of the Twannberg type IIG iron meteorite is located in the Swiss Jura Mountains, 30 km northwest of Bern. The strewn field has been mapped by a group of citizen scientists since 2006, yielding more than 2000 meteorite fragments ...
Beda A. Hofmann +6 more
doaj +1 more source
, 2023 African Meteorites is a comprehensive exploration of meteorite falls and finds across the arid and hot regions of the African continent, offering profound insights into a significant collection of meteorites, second only to Antarctica.
Khiri F. +3 more
core +1 more source
Bulk chemical compositions of Antarctic meteorites in the NIPR collection
, 2018 Bulk chemical compositions of meteorites were traditionally analyzed by wet chemical analysis, and NIPR has data for 1162 meteorites as of September 2017. We discuss the classification of meteorites on the basis of these data.
N. Imae +9 more
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Morphology of Meteorite Surfaces Ablated by High-Power Lasers: Review and Applications
Applied Sciences, 2022 Under controlled laboratory conditions, lasers represent a source of energy with well-defined parameters suitable for mimicking phenomena such as ablation, disintegration, and plasma formation processes that take place during the hypervelocity ...
Anna Křivková +21 more
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Occurrence and Provenance of KREEP Components in Glassy Agglutinates From Chang'e‐5 Lunar Regolith
Geochemistry, Geophysics, GeosystemsThis study investigates the petrogenesis of glassy agglutinates in a polished section of the Chang'e‐5 lunar regolith sample CE5C0800YJYX018GP through integrated petrographic, mineralogical, and geochemical analyses of four representative particles (18GP‐
Shuai Ma, Zhipeng Xia, Bingkui Miao
doaj +1 more source
The Anatomical Record, EarlyView.Abstract Phylogenetic comparative methods have been used in recent literature to work with laws and test for regularities (evolutionary associations of quantitative features) and evolutionary singularities (features that evolved in a single taxon). We analyzed these uses epistemologically, taking the evolution of red‐blood‐cell mean corpuscular volume (
Jorge Cubo +3 more
wiley +1 more source
Cosmogenic Potassium in Iron Meteorites [PDF]
, 2022 This project aims to reintroduce the 41K-K Cosmic ray exposure (CRE) age dating system for iron meteorites. For this, very low amounts of potassium isotopes need to be extracted from the iron meteorite. Attempts using chemical extraction methods, i.e.,
Khan, Hammad
core
Nature Communications, 2020 This manuscript tackles the origin of organic molecules in carbonaceous meteorites. Identifying hexamethylenetetramine in three carbonaceous meteorites, the authors propose formation from ammonia and formaldehyde by photochemical and thermal reactions in
Yasuhiro Oba +6 more
doaj +1 more source
Uncatalyzed Guanosine Phosphorylation under Potentially Prebiotic Conditions
Chemistry – A European Journal, EarlyView.Pyrophosphate acts as phosphorylating agent of guanosine under simple wet‐dry cycles without condensing agent and inorganic catalysts to afford cyclic guanosine monophosphate derivatives useful for oligomerization in prebiotic processes. ABSTRACT The phosphorylation of nucleosides and their subsequent polymerization are key issues in the study of the ...
Martina Proietti +5 more
wiley +1 more source
Variations in the Magnetic Properties of Meteoritic Cloudy Zone
Geochemistry, Geophysics, Geosystems, 2020 Iron and stony‐iron meteorites form the Widmanstätten pattern during slow cooling. This pattern is composed of several microstructures whose length‐scale, composition and magnetic properties are dependent upon cooling rate.
Claire I. O. Nichols +7 more
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