Results 101 to 110 of about 155,621 (344)

Experimental Study on the Isotopes Exchange in CO Molecular

Journal of Isotopes, 2015
It was studied that the rearrangement of oxygen isotopes and carbon isotopes in CO molecular caused by thermodynamic equilibrium in the presence of catalyst. The appropriate reaction conditions was obtained by analyzing the reactants of 12C18O and 13C16O
LONG Lei, XU Bao-yun, JIANG Yong-yue
doaj   +1 more source

Interpretation of Oxygen Isotopes in Phanerozoic Ophiolites and Sedimentary Rocks

Geochemistry, Geophysics, Geosystems, 2020
Two reactive transport models were developed to integrally simulate fluxes of oxygen isotopes from hydrothermal alteration of oceanic crust and weathering of continental rocks for a better understanding of the regulation of oxygen isotopes in the ocean ...
Yoshiki Kanzaki
doaj   +1 more source

The (32)S/(33)S abundance as a function of galactocentric radius in the Milky Way [PDF]

Astration of heavy elements by the stars of the Milky Way forms a fossil record which may preserve spacial distribution of the mass function for the stars in the galaxy.
Greenhouse, M. A., Thronson, H. A., Jr.
core   +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, Thomas Götsch, Daniel Cruz, Maurits Vuijk, Juan M. Lombardi, Markus Pietsch, Kassiogé Dembélé, Adnan Hammud, Karsten Reuter, Christoph Scheurer, Axel Knop‐Gericke, Thomas Lunkenbein   +11 more
wiley   +1 more source

A global compilation of diatom silica oxygen isotope records from lake sediment – trends, and implications for climate reconstruction

, 2023
Philip Meister, Anne Alexandre, Hannah Bailey, Philip Barker, Boris K. Biskaborn, Ellie Broadman, Rosine Cartier, Bernhard Chapligin, Martine Couapel, Jonathan R. Dean, Bernhard Diekmann, Poppy Harding, Andrew C. G. Henderson, Armand Hernández, Ulrike Herzschuh, Svetlana S. Kostrova, Jack H. Lacey, Melanie J. Leng, Andreas Lücke, Anson W. Mackay, Enikő K. Magyari, Biljana Narancic, Cécile Porchier, Gunhild Rosqvist, Aldo Shemesh, Corinne Sonzogni, George E. A. Swann, Florence Sylvestre, Hanno Meyer   +28 more
openalex   +1 more source

Trapped Fluorine Enables Thermally Stable Broadband Photodetection in Graphene/Fluorinated Graphene Heterostructure

Advanced Materials Technologies, EarlyView.
Fluorinated graphene has opened new opportunities for real‐world applications; however, its working and thermal stability are key issues for practical use. This study successfully demonstrates the stability of a fluorinated graphene‐based photodetector, achieved through a graphene, fluorinated graphene heterostructure (Gr/F‐Gr HS).
Mukesh Kumar Thakur, Javier Varillas, Oleksandr Volochanskyi, Golam Haider, Jan Plšek, Farjana J. Sonia, Álvaro Rodríguez, Jaganandha Panda, Martin Mergl, Otakar Frank, Jana Vejpravová, Martin Kalbáč   +11 more
wiley   +1 more source

A Review on Microreactor Design for Effective Fischer–Tropsch Process Intensification

Advanced Materials Technologies, EarlyView.
Design strategies for effective Fischer–Tropsch process intensification are summarized based on experimental and simulation experiences. Recommendations for catalyst loading of packed‐bed and wash‐coated microchannel, microtube, micromonolith, and microstructured reactors are discussed.
Yangjun Wei, Lukas Thum, Avela Kunene, Daniel Amkreutz, Rutger Schlatmann, Sonya Calnan   +5 more
wiley   +1 more source

Stable isotopes in diatom silica [PDF]

, 2010
Diatom silica is a form of biogenic opal (SiO2.nH2O, Figure 1) containing oxygen, silicon, carbon and nitrogen isotopes that can be used in lacustrine and marine paleoenvironmental studies.
Leng, Melanie J., Swann, George E.A.
core  

Contrasting Styles of Oxygen Isotope Exchange [PDF]

Mineralogical Magazine, 1994
Exchange of oxygen isotopes encrypts a sensitive record of the thermal evolution and fluid-exchange history of igneous and metamorphic rocks. Deciphering this record requires measurement of isotope ratios at an appropriate scale together with understanding of the processes involved: diffusion, recrystallization, new mineral growth, and fluid ...
openaire   +1 more source

Oxygen isotope ratios in the shell of Mytilus edulis : archives of glacier meltwater in Greenland? [PDF]

, 2012
Emma Versteegh, M. E. Blicher, John Mortensen, Søren Rysgaard, Thomas D. Als, A. D. Wanamaker Jr.   +5 more
openalex   +1 more source