Results 231 to 240 of about 3,681,214 (292)

A ∼0.5 Myr perturbation of carbon and mercury cycles during the Middle Triassic biotic radiation. [PDF]

Sci Adv
Cao Y, Chu D, Yin R, Song H, Dal Corso J, Ovtcharova M, Gianolla P, Grasby SE, Benton MJ, Dai X, Alverà G, Roghi G, Caggiati M, Schneider-Mor A, Korngreen D, Tong J.   +15 more
europepmc   +1 more source

Mercury mobilization and export from the Greenland Ice Sheet using an ice-to-ocean approach. [PDF]

Commun Earth Environ
Youssef AN, Janssen SE, Lamborg C, Tate MT, Despins M, Doting EL, Poulin BA, McCabe D, Hopf LM, Ferrer EK, Doroshow A, Lamarche-Gagnon G, Delaney I, Gevers M, Hatton J, Kubler-Dudgeon I, Murphy JG, Schartup AT, Stibal M, West J, Hawkings JR.   +20 more
europepmc   +1 more source

Tree-ring stable isotopes and growth trajectories reveal early warning signals of drought-induced Scots pine mortality. [PDF]

Tree Physiol
Urban O, Hartl C, Zang C, Pernicová N, Čáslavský J, Treydte K, Schneider L, Trnka M, Esper J, Büntgen U.   +9 more
europepmc   +1 more source

Reconstruction of paleoenvironments using carbon stable isotopes of specific compounds

Anais da Academia Brasileira de Ciências, 2000
Santos Neto Eugenio V.
doaj  

δ¹³C as a Continuum: Tissue-Based, Ontogenetic, and Interspecific Variation in Carbon Sourcing of a Photosymbiotic Bivalve (Subfamily Fraginae). [PDF]

Ecol Evol
Schmidt A, Tan ADY, Li J, Kirkendale L, Li R.   +4 more
europepmc   +1 more source

Food webs in forest and pasture streams in the Waikato region, New Zealand: A study based on analyses of stable isotopes of carbon and nitrogen, and fish gut contents [PDF]

New Zealand Journal of Marine and Freshwater Research, 1997
Stable isotopes of carbon (C) and nitrogen (N) were studied in 11 stream communities in the Waikato region of New Zealand. From comparisons of mean d13C and d15N values, food webs in the shaded, forest streams were clearly based on allochthonous material
Brendan J. Hicks
exaly   +2 more sources

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Stable carbon isotopes in human tissues

Nature, 1978
ON studying the distribution of 14C from nuclear weapon tests in a wide range of human tissues, it was observed that significant modification of 14C/12C isotopic ratio had occurred, largely as a function of variable carbon renewal rates1,2. As a parallel exercise, 13C/12C isotope ratios have been assayed, 13C and 12C being the nonradioactive isotopes ...
T D, Lyon, M S, Baxter
openaire   +2 more sources

Mercury and Stable Isotopes of Carbon and Nitrogen in Mink

Environmental Toxicology and Chemistry, 2007
Abstract Total Hg concentrations and values of stable isotopes (δ15N, δ13C) in tissues of mink (Mustela vison) captured in Rhode Island (USA) during winters of 1999 to 2004 were statistically distinct based on location. Mink captured in salt marsh environments (salt marsh group mink [SMGM]) had significantly lower mean Hg concentrations ...
James L, Lake, Stephan A, Ryba, Jonathan, Serbst, Charles F, Brown, Lori, Gibson   +4 more
openaire   +2 more sources

Stable Isotope Geochemistry of Various Carbonates

John Heinrichs Scholarly & Creative Activities Day, 2021
This submission is unavailable.
Jenna Howard, Kaiden O'Dell, Riley Sanford, Matthew Tuttle, Jerrad Watts, Mitchell Lukens   +5 more
openaire   +1 more source

The separation of stable isotopes of carbon

Russian Chemical Reviews, 1989
The present state of work on the separation of carbon isotopes by diffusion, fractional distillation, chemical isotopic exchange, and the selective excitation and dissociation of molecules in electrical discharges or in the field of laser radiation has been examined.
E D Oziashvili, A S Egiazarov
openaire   +1 more source