Results 31 to 40 of about 13,316 (289)

Potential Chronological Disturbance of the D’Orbigny Angrite Inferred from Discordant 26Al Ages

The Astrophysical Journal Letters
Angrites originate from the early-formed differentiated angrite parent body. The pristine volcanic angrite D’Orbigny is devoid of brecciation, shock effects, or any evidence of secondary processes and is thus key for studying the early stages of ...
Cécile Deligny, Maxime Piralla, Johan Villeneuve, Evelyn Füri, Yves Marrocchi   +4 more
doaj   +1 more source

Iron Isotope Constraints on the Structure of the Early Solar System

The Astrophysical Journal Letters, 2023
The recent advent of nontraditional isotopic systems has revealed that meteorites display a fundamental isotopic dichotomy between noncarbonaceous (NC) and carbonaceous (C) groups, which represent material from the inner and outer solar system ...
Yves Marrocchi, Maxime Piralla, François L. H. Tissot   +2 more
doaj   +1 more source

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

Advanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong, Changfan Xu, Huaping Zhao, Yong Lei   +3 more
wiley   +1 more source

The First Spatially Resolved Detection of 13CN in a Protoplanetary Disk and Evidence for Complex Carbon Isotope Fractionation

The Astrophysical Journal
Recent measurements of carbon isotope ratios in both protoplanetary disks and exoplanet atmospheres have suggested a possible transfer of significant carbon isotope fractionation from disks to planets.
Tomohiro C. Yoshida, Hideko Nomura, Kenji Furuya, Richard Teague, Charles J. Law, Takashi Tsukagoshi, Seokho Lee, Christian Rab, Karin I. Öberg, Ryan A. Loomis   +9 more
doaj   +1 more source

Atom probe microscopy of zinc isotopic enrichment in ZnO nanorods

AIP Advances, 2017
We report on atomic probe microscopy (APM) of isotopically enriched ZnO nanorods that measures the spatial distribution of zinc isotopes in sections of ZnO nanorods for natural abundance natZnO and 64Zn and 66Zn enriched ZnO nanorods.
C. N. Ironside, D. W. Saxey, W. D. A. Rickard, C. Gray, E. McGlynn, S. M. Reddy, N. A. Marks   +6 more
doaj   +1 more source

ISOTOPIC ABUNDANCES OF MAGNESIUM - ²⁴Mg, ²⁵ Mg, ²⁶ Mg IN THE ATMOSPHERES OF G-K - GIANTS

Odessa Astronomical Publications, 2017
The isotopic abundances of magnesium in the star of thin disk of Galaxy with various chromospheric activity were studied. We use the new data about molecular constants of radiation for isotopes 24Mg, 25Mg, and 26Mg.
V. V. Kovtyukh, N. S. Komarov, S. M. Andrievsky, I. F. Dulapchi   +3 more
doaj   +1 more source

Copper‐based Materials for Photo and Electrocatalytic Process: Advancing Renewable Energy and Environmental Applications

Advanced Functional Materials, EarlyView.
Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida, Yanjie Wang, Thais A. Rodrigues, Paulo H. H. Nunes, Vagner R. de Mendonça, Paulo H. E. Falsetti, Leticia V. Savazi, Tao He, Alexandra V. Bardakova, Aida V. Rudakova, Jie Tian, Alexei V. Emeline, Osmando F. Lopes, Antonio Otavio T. Patrocínio, Jia Hong Pan, Caue Ribeiro, Detlef W. Bahnemann   +16 more
wiley   +1 more source

Copper Doping Enhances the Activity and Selectivity of Atomically Precise Ag44 Nanoclusters for Photocatalytic CO2 Reduction

Advanced Functional Materials, EarlyView.
By a simple anti‐Galvanic reaction, up to six copper atoms could be preferably doped into the Ag2(SR)5 staple motifs and Ag20 dodecahedral shell of an atomically precise Ag44(SR)30 nanocluster. When anatase TiO2 is used as substrate, the (AgCu)44/TiO2 photocatalyst exhibited much improved activity in photocatalytic CO2 reduction compared to Ag44/TiO2 ...
Ye Liu, Xi Zheng, Xiufan Liu, Tengyuan Gao, Nicola Pinna, Yu Wang   +5 more
wiley   +1 more source

Isotopic Ratios in the Disk of HD 163296

The Astrophysical Journal Letters
Isotopic abundance ratios in protoplanetary disks are critical for understanding volatile inheritance and chemical evolution in planet-forming environments. We present Atacama Large Millimeter/submillimeter Array observations of the rare isotopologue ^13
Chunhua Qi, David J. Wilner, Catherine C. Espaillat   +2 more
doaj   +1 more source

Anammox Bacteria Are Potentially Involved in Anaerobic Ammonium Oxidation Coupled to Iron(III) Reduction in the Wastewater Treatment System

Frontiers in Microbiology, 2021
Anaerobic ammonium oxidation coupled to nitrite reduction (termed as Anammox) was demonstrated as an efficient pathway to remove nitrogen from a wastewater treatment system.
Xiao-Ru Yang, Xiao-Ru Yang, Hu Li, Hu Li, Jian-Qiang Su, Jian-Qiang Su, Guo-Wei Zhou, Guo-Wei Zhou, Guo-Wei Zhou   +8 more
doaj   +1 more source