Results 31 to 40 of about 102,836 (336)
Angewandte Chemie, EarlyView.A reaction starting from two amino acids, phosphoserine and Gly, reveals a pathway to the α‐keto acid building blocks pyruvate and glyoxylate, key components of a plausible early metabolic system. A one‐pot β‐elimination and transamination sequence also initiates a cascade of protometabolic transformations that provide crucial insights into the ...
Louis M.P. Ter‐Ovanessian +5 more
wiley +2 more sources
Report on Antarctic meteorites search around the Sor Rondane Mountains, JARE-29 1988-1989
Antarctic Record, 1990 A systematic search for Antarctic meteorites was carried out by the Asuka winter party of the 29th Japanese Antarctic Research Expedition on the bare ice field around the Sφr Rondane Mountains in the 1987-1988 and 1988-1989 field seasons.
Hiroshi Naraoka +2 more
doaj +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
doaj +1 more source
Scientific Reports, 2016 We show that carbonaceous chondrite meteorites actively and selectively catalyze the formation of relevant prebiotic molecules from formamide in aqueous media.
L. Rotelli +6 more
semanticscholar +1 more source
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
School Science and Mathematics, 1906 A second edition of this leaflet was issued in 1941 with minor additions. ; Pages also numbered 33-43 at foot of pages. ; Cover title. ; Mode of access: Internet. ; Fieldiana, Popular series, Geology, was published by Field Museum of Natural History, Dept. of Geology as Leaflet (no. 1-4, 1922-1923) and as Geology leaflet (no. 5-14, 1925-1933).
openaire +1 more source
Previously unknown class of metalorganic compounds revealed in meteorites
Proceedings of the National Academy of Sciences of the United States of America, 2017 Significance In this study we report the discovery of a previously unrecognized chemical class, dihydroxymagnesium carboxylates, [(HO)2MgO2CR]−, gained from nonterrestrial meteoritic analyses.
A. Ruf +21 more
semanticscholar +1 more source
Molecules, 2023 Experimental studies of the degradation of two ribonucleosides (guanosine and uridine) were carried out by making use of mechanochemistry. Mechanochemical experiments reveal the decomposition of guanosine and uridine, promoted by nickel(II) and carbonate
Gustavo P. Maia +3 more
doaj +1 more source