Results 41 to 50 of about 2,105,092 (295)

Isotope Engineering of Carbon Nanotube Systems [PDF]

Physical Review Letters, 2005
4 pages, 4 ...
Simon, F., Kramberger, Ch., Pfeiffer, R., Kuzmany, H., Zolyomi, V., Kurti, J., Singer, P. M., Alloul, H.   +7 more
openaire   +3 more sources

Using 13C-, 15N-, and 18O stable isotope analysis of human bone tissue to identify transhumance, high altitude habitation and reconstruct palaeodiet for the early medieval Alpine population at Volders, Austria [PDF]

, 2007
The analysis of stable isotopes of oxygen from structural carbonate in archaeological human bone samples originating from an early medieval cemetery in the Alpine community of Volders, Austria were used to determine the utilization of higher altitudes ...
McGlynn, George
core   +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

Convergence of soil nitrogen isotopes across global climate gradients [PDF]

, 2015
Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems, and climate forcing.
Brookshire, E. N. Jack, Brookshire, E N J, Mack, Michelle C., Stevenson, Bryan A, Cramer, Michael Denis, Hobbie, Erik A, Richter, Andreas, Viani, Ricardo A.G., Oliveira, Rafael S., Tumer, Benjamin L., Oliveira, Rafael S, McLauchlan, Kendra K, Peri, Pablo L, Mack, Michelle C, Zeller, Bernd, Kahmen, Ansgar, Brookshire, E. N. J., Hasselquist, Niles J., Nardoto, G. B., Craine, Joseph M., Viani, Ricardo A G, Wan?k, Wolfgang, Stevenson, Bryan A., Nardoto, Gabriela B, Nardoto, Gabriela B., Quesada, Carlos Alberto, Brookshire, E.N.J., Turner, Benjamin L., Turner, Benjamin L, Craine, Joseph M, Viani, Ricardo A. G., Cramer, Michael D, Peri, Pablo Luis, Elmore, Andrew J., McLauchlan, Kendra K., Augusto, Laurent, Marin-Spiotta, Erika, Zeller, Bernhard, Kranabetter, J. Marty, Mayor, Jordan R., Hasselquist, Niles J, Richter, Andreas A., Quesada, Carlos A, Kranabetter, John Marty, Hobbie, Erik A., Brookshire, E. N.Jack, Michelsen, Anders, Perakis, Steven S, Wanek, Wolfgang, Craine, Joseph Mitchell, Schipper, L. A., Peri, Pablo L., Elmore, Andrew J, Perakis, Steven S., Kranabetter, J Marty, Schipper, Louis A., Baisden, W. Troy, Koba, Keisuke, Elmore, Andrew James, Viani, Ricardo Augusto Gorne, Baisden, W Troy, Wang, Lixin, Schipper, Louis A, Mayor, Jordan R, Cramer, Michael D., Quesada, Carlos A.   +65 more
core   +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

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
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

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 Composition of Carbon in Vinegars

Journal of AOAC INTERNATIONAL, 1985
Abstract Measurements of δ13C and 14C-activity were performed on vinegars from various known sources. Natural vinegar can be distinguished from petrochemical acetic acid by 14C-analysis: Natural vinegar currently gives values of > 112% of modern activity; petrochemical acetic acid yields values of 0% of modern activity.
D A, Krueger, H W, Krueger
openaire   +2 more sources