Results 111 to 120 of about 95,822 (213)

Patterns of δ13C and δ15N in wolverine Gulo gulo tissues from the Brooks Range, Alaska

Current Zoology, 2009
Knowledge of carnivore diets is essential to understand how carnivore populations respond demographically to variations in prey abundance. Analysis of stable isotopes is a useful complement to traditional methods of analyzing carnivore diets.
Fredrik DALERUM, Anders ANGERBJÖRN, Kyran KUNKEL, Brad S. SHULTS   +3 more
doaj  

Stable isotopes and changing paradigms on soil nitrogen and carbon biogeochemistry

Ecosistemas, 2010
Muchos de los modelos conceptuales e ideas desarrollados en el ámbito de la biogeoquímica se basan en diagramas de flujo que representan las reservas de nutrientes como "cajas" interconectadas por "flechas" que indican los procesos abióticos y bióticos ...
J. A. Carreira, B. Viñegla, M. C. Blanes, R. García-Ruiz   +3 more
doaj  

Nitrogen stable isotope fractionation by biological nitrogen fixation reveals cellular nitrogenase is diffusion limited

PNAS Nexus
Abstract Biological fixation of dinitrogen (N2), the primary natural source of new bioavailable nitrogen (N) on Earth, is catalyzed by the enzyme nitrogenase through a complex mechanism at its active site metal cofactor. How this reaction functions in cellular environments, including its rate-limiting step, and how enzyme structure ...
Eunah Han, Sebastian H Kopf, Ashley E Maloney, Xuyuan Ellen Ai, Daniel M Sigman, Xinning Zhang   +5 more
openaire   +2 more sources

Assessing the Utility of Hydrogen, Carbon and Nitrogen Stable Isotopes in Estimating Consumer Allochthony in Two Shallow Eutrophic Lakes. [PDF]

PLoS One, 2016
Syväranta J, Scharnweber K, Brauns M, Hilt S, Mehner T.   +4 more
europepmc   +1 more source

Recent benthic foraminifera from the Tagus Prodelta and Estuary, Portugal: microhabitats, assemblage composition and stable isotopes [PDF]

, 2006
Abrantes, Fatima G., Bartels-Jónsdóttir, Helga Bára, Knudsen, Karen Luise, Lebreiro, Susana M., Schönfeld, Joachim   +4 more
core   +1 more source

Linking mercury, carbon, and nitrogen stable isotopes in Tibetan biota: Implications for using mercury stable isotopes as source tracers. [PDF]

Sci Rep, 2016
Xu X, Zhang Q, Wang WX.
europepmc   +1 more source

Improving the measurement of nitrogen stable isotopes in organic materials containing high C:N ratios using a 5A molecular sieve column. [PDF]

MethodsX
Carvalho MC, Gomez-Alvarez P, Jeffrey LC, Maher DT.   +3 more
europepmc   +1 more source

Stable isotope geochemistry of nitrogen in marine particulates [PDF]

, 1983
openaire   +1 more source

Tracking Soil Nitrogen with Stable Isotopes

CSA News, 2017
openaire   +1 more source

Mixotrophy emerges as an optimal strategy in mature waters of the Amazon River plume. [PDF]

Commun Biol
Fernández-Carrera A, Choisnard N, Wodarg D, Liskow I, Subramaniam A, Montoya JP, Voss M, Loick-Wilde N.   +7 more
europepmc   +1 more source