Results 21 to 30 of about 128,867 (311)

Experimental support towards a metabolic proxy in fish using otolith carbon isotopes

Journal of Experimental Biology, 2020
Metabolic rate underpins our understanding of how species survive, reproduce and interact with their environment, but can be difficult to measure in wild fish.
Jasmin C. Martino, Z. Doubleday, Ming‐Tsung Chung, B. Gillanders   +3 more
semanticscholar   +1 more source

Carbon and oxygen isotope variation and its implication for marine sequence: A case study of Ordovician in Tarim Basin

Petroleum Research, 2017
Carbon and oxygen isotopes of marine carbonate rocks or fossil shells could indicate global sea-level relative change. Generally, heavier carbon isotopes or lighter oxygen isotopes reflected rise of global sea-level relative changes, and vice versa.
Zongju Zhao, Jianguo Wang, Peixi Wang
doaj   +1 more source

Biochemical and physiological bases for the use of carbon and nitrogen isotopes in environmental and ecological studies

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, N. Ogawa, Y. Chikaraishi, Hiroyuki Tanaka, E. Wada   +4 more
semanticscholar   +1 more source

Modeling the evolution of pulse-like perturbations in atmospheric carbon and carbon isotopes: the role of weathering–sedimentation imbalances

Climate of the Past, 2020
. Measurements of carbon isotope variations in climate archives and isotope-enabled climate modeling advance the understanding of the carbon cycle.
A. Jeltsch-Thömmes, F. Joos
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

Confinement Effect and Hydrogen Species Modulation toward Enhanced Electrochemical CO2 Reduction to Ethanol

Research
The 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, Jiamin Zhu, Huizhi Li, Shuhui Li, Yue Zhai, Shao-Wen Xu, Shanshan Wu, Yuan Chen, Yafu Wang, Rui Ren, Li An, Jiangwei Zhang, Pinxian Xi, Chun-Hua Yan   +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, Amanda Dawn Melin, Amanda Dawn Melin, Justin Douglas Yeakel, Justin Douglas Yeakel, Nathaniel Jay Dominy   +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
doaj   +1 more source

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, Corina Knipper, Mila Spross, Ronny Friedrich, Steffen Schwarz   +4 more
doaj   +1 more source

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, A. Ghaderi, L. Leda, M. Schobben, S. Tomás, W. J. Foster, W. J. Foster, M.-B. Forel, N. Ghanizadeh Tabrizi, S. E. Grasby, U. Struck, A. R. Ashouri, D. Korn   +12 more
doaj   +1 more source