Results 161 to 170 of about 1,126 (270)

Astronomically calibrating early Ediacaran evolution. [PDF]

Nat Commun
Zhang T, Ma C, Li Y, Li C, Da Silva AC, Fan T, Gao Q, Kuang M, Liu W, Li M, Hou M.   +10 more
europepmc   +1 more source

Parallel worlds and mixed economies: multi-proxy analysis reveals complex subsistence systems at the dawn of early farming in the northeast Baltic. [PDF]

R Soc Open Sci, 2023
Oras E, Tõrv M, Johanson K, Rannamäe E, Poska A, Lõugas L, Lucquin A, Lundy J, Brown S, Chen S, Varul L, Haferberga V, Legzdiņa D, Zariņa G, Cramp L, Heyd V, Reay M, Pospieszny Ł, Robson HK, Nordqvist K, Heron C, Craig OE, Kriiska A.   +22 more
europepmc   +1 more source

Bis(2‐Adamantyl)Magnesium: Synthesis, Structure, and Applications of a Versatile and Shelf‐Stable 2‐Adamantyl Anion Equivalent

Chemistry – A European Journal, EarlyView.
At last, the long‐sought bis(2‐adamantyl)magnesium reagent has been prepared in high yield as a stable tetrahydrofuran/dioxane adduct and fully characterized by x‐ray crystallography. This potent nucleophile outperforms the corresponding Grignard in transmetallation and carbonyl addition reactions, opening new avenues in adamantyl organometallic and ...
Matthew V. DaCosta, Fioralba Taullaj, Jack H. Lin, Ulrich Fekl   +3 more
wiley   +1 more source

Paleoproterozoic Mississippi Valley-type mineralization at Black Angel, Greenland: evidence from sulfide δ⁶⁶Zn and rhenium-osmium geochronology. [PDF]

Miner Depos
Saintilan NJ, Archer C, Szilas K, Krüger Geertsen K, Rosa D, Spangenberg JE.   +5 more
europepmc   +1 more source

The Electronic Spin State of Diradicals Obtained from the Nuclear Perspective: The Strange Case of Chichibabin Radicals

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The electronic spin state of two Chichibabin radicals is investigated using 2‐dimensional hyperfine correlated Electron Nuclear Double Resonance. The protons (I=1/2) act as a reference for the electronic spin quantum number (S) via their hyperfine interactions.
Gabriel Moise, Saleta Fernández, Kit Joll, Mikhail V. Vaganov, Fátima García, Christiane R. Timmel, Diego Peña, Arzhang Ardavan   +7 more
wiley   +1 more source

A revised radiocarbon chronology for the mammoth bone structures and associated features at Mezhyrich, Ukraine. [PDF]

Open Res Eur
Chu W, Shydlovskyi P, Maier A.
europepmc   +1 more source

Identifying crustal contributions in the Patagonian Chon Aike Silicic Large Igneous Province. [PDF]

Contrib Mineral Petrol, 2023
Foley ML, Putlitz B, Baumgartner LP, Renda EM, Ulianov A, Siron G, Chiaradia M.   +6 more
europepmc   +1 more source

Sustainable Hydrogen Production by Glycerol and Monosaccharides Catalytic Acceptorless Dehydrogenation (AD) in Homogeneous Phase

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
Sustainable hydrogen production can be obtained from hydogen‐rich biomass‐derived organic molecules through Acceptorless Dehydrogenation (AD) reactions. Glycerol and sugars are available in large quantities from industry and can be successfully used as substrates in AD protocols, in the presence of tailored, selective, easily tunable and thermally ...
Sylwia Kostera, Luca Gonsalvi
wiley   +1 more source

Coastal land uplift and intensified land-use influence seagrass carbon and nitrogen sink capacity over millennial timescales. [PDF]

Sci Rep
Dahl M, Braun S, Asplund ME, Björk M, Kaal J, Linderholm HW, Andrén E, Andrén T, Ežerinskis Ž, Faizal MV, Forsberg SC, Garbaras A, Kylander ME, Masqué P, Mateo MA, Šapolaitė J, Serrano O, Svensson JR, Vinogradova O, Gullström M.   +19 more
europepmc   +1 more source

Analytical Methods for Os Isotope Ratios and Re-PGE Mass Fractions in Geological Samples. [PDF]

Front Chem, 2020
Chu Z.
europepmc   +1 more source