Results 31 to 40 of about 104,171 (282)
Progress in Earth and Planetary Science, 2015 We review the biochemical and physiological bases of the use of carbon and nitrogen isotopic compositions as an approach for environmental and ecological studies. Biochemical processes commonly observed in the biosphere, including the decarboxylation and
N. Ohkouchi +4 more
semanticscholar +1 more source
Tracing the Deep Carbon Cycle Using Metal Stable Isotopes: Opportunities and Challenges
Engineering, 2019 The subduction of marine carbonates and carbonated oceanic crust to the Earth’s interior and the return of recycled carbon to the surface via volcanism may play a pivotal role in governing Earth’s atmosphere, climate, and biosphere over geologic time ...
Sheng-Ao Liu, Shu-Guang Li
doaj +1 more source
Carbon Isotopic Measurements of Nanotubes to Differentiate Carbon Sources [PDF]
ACS Omega, 2019 Stable carbon isotope (δ(13C)) analysis can provide information concerning the starting materials and the production process of a material. Carbon nanotubes (CNTs) are produced using a variety of starting materials, catalysts, and production methods.
Chartrand, Michelle M. G. +3 more
openaire +3 more sources
ResearchThe protonation process of adsorbed *CO intermediates has been widely recognized as a critical determinant governing product selectivity in electrocatalytic carbon dioxide reduction reaction (eCO2RR). However, the active hydrogen species and mechanism of
Yuting Zhu +13 more
doaj +1 more source
Do oxygen isotope values in collagen reflect the ecology and physiology of neotropical mammals?
Frontiers in Ecology and Evolution, 2015 Stable isotope data provide insight into the foraging ecology of animals. Traditionally, carbon and nitrogen isotope values have been used to infer dietary and habitat preferences.
Brooke eCrowley +5 more
doaj +1 more source
Isotope sample preparation of diatoms for paleoenvironmental research.
PLoS ONE, 2023 Isotopes in diatoms are increasingly used in palaeoenvironmental studies in both lacustrine and marine settings, enabling the reconstruction of a range of variables including temperature, precipitation, salinity, glacial discharge, carbon dynamics and ...
George E A Swann, Andrea M Snelling
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Isotopic Fingerprinting: A Promising Tool for Coffee Authenticity Checks
Proceedings, 2023 Almost every physical or chemical process in nature favors certain light stable isotopes over others, and thereby leaves an isotopic “fingerprint” on the substances involved.
Johannes Wintel +4 more
doaj +1 more source
Carbon stable isotope turnover and fractionation in grass carp Ctenopharyngodon idella tissues
Aquatic Biology, 2013 Carbon stable isotope signatures can effectively trace food sources, elucidate trophic interactions, and presumably reflect food web structure. The present study conducted a diet-switch experiment using freshwater teleost grass carp Ctenopharyngodon ...
B Xia, QF Gao, SL Dong, F Wang
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Limnology and Oceanography Letters, 2021 Lateral fluxes (i.e., outwelling) of dissolved organic (DOC) and inorganic (DIC) carbon and total alkalinity were estimated using radium isotopes at the groundwater, mangrove creek, and continental shelf scales in the Amazon region.
Alex Cabral +8 more
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Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian–Triassic boundary section [PDF]
Fossil Record, 2020 The Permian–Triassic boundary section in the Aras Valley in NW Iran is investigated with respect to carbonate microfacies, biostratigraphy (particularly conodonts, nautiloids, and ammonoids), chemostratigraphy (carbon isotopes), and environmental setting.
J. Gliwa +12 more
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