Results 71 to 80 of about 13,316 (289)
First Detection of CH3OD in Prestellar Cores
The Astrophysical JournalThe isotopic ratios of deuterated methanol derived around protostars are commonly used to infer the physical conditions under which they formed in the earlier prestellar stage.
Beatrice M. Kulterer +8 more
doaj +1 more source
Advanced Materials, EarlyView.This review presents a focused and integrated perspective on copper‐based catalysts for the selective electrochemical reduction of CO2 to methanol. It elucidates active site dynamics, mechanistic pathways, and structure–activity relationships, while connecting fundamental insights with catalyst design, reactor engineering, and techno‐economic ...
Debabrata Bagchi +7 more
wiley +1 more source
The Astrophysical JournalThe Mg–Al cycle is characteristic of the high-temperature ( T ∼ 0.055 GK) H-burning of evolved stars and their nucleosynthesis. A proper comprehension of this reaction network can help in solving debated questions such as the occurrence of ...
M. La Cognata +26 more
doaj +1 more source
Red horizontal branch stars in the Galactic field: A chemical abundance survey
EPJ Web of Conferences, 2013 A large sample survey of Galactic red horizontal-branch (RHB) stars was conducted to investigate their atmospheric parameters and elemental abundances.
Fo B.-Q., Sneden C., Afşar M.
doaj +1 more source
Stabilizing Frustrated Phase Transitions in Selective Oxidation Reactions
Advanced Materials, EarlyView.Using multimodal operando spectromicroscopy, the frustrated phase transition responsible for selective oxidation over cobalt oxide spinel catalysts is identified, corresponding to combined surface reaction and Mars‐van Krevelen (MvK) dynamics. This regime is disrupted by the formation of mobile vacancies and the depletion of active oxygen at high ...
Luis Sandoval‐Diaz +11 more
wiley +1 more source
Equilibrium Abundances of Stable Isotopes [PDF]
Progress of Theoretical Physics, 1961 Equilibrium distribution calculated using the analogue of Saha's ionization formula is examined with the recent nuclear masses and abundance data. It is found that up to A = 92, the abundance distribution can be well reproduced. The electron degeneracy which becomes important is also considered for the region A = 64-92.
openaire +1 more source
Advanced Materials, EarlyView.Heterophase fcc‐hcp‐fcc RuFeMMnMo (M═CoNi, Co, and Ni) high‐entropy alloy nanomaterials have been successfully synthesized using a one‐pot approach. The highly random distribution of multiple metal components and the tunable diversity of metal atomic arrangements can be realized simultaneously. By combining metals with different work functions, fcc‐hcp‐
Xiang Meng +18 more
wiley +1 more source
The Astrophysical JournalResolved molecular line observations are essential for gaining insight into the physical and chemical structure of protoplanetary disks, particularly in cold, dense regions where planets form and acquire their chemical compositions.
Parashmoni Kashyap +19 more
doaj +1 more source
Carbonatites from the Southern Brazilian platform: I
Open Geosciences, 2020 We present a comprehensive overview of the geochemical characteristics and evolution of the carbonatites from the southern Brazilian Platform (Paraná Basin).
Speziale Sergio +5 more
doaj +1 more source