Results 241 to 250 of about 3,466,743 (324)

Predation threat affects isotope ratios of planktonic consumers. [PDF]

Oecologia
Brzeziński T, Bojanowski M, Radzikowska M.   +2 more
europepmc   +1 more source

Dietary stability in ancient Serbia: Isotopic analysis of two middle bronze age Moriš Cemeteries. [PDF]

PLoS One
Tomažič I, Pompeani K, Larson K, Nicodemus A, O'Shea J, Milašinović L, Ventresca-Miller A.   +6 more
europepmc   +1 more source

Recent production rates of cosmogenic nuclides in the igneous rocks of Jezero crater floor, Mars. [PDF]

Sci Rep
Zorzano M-, García-Herrera AC, Martín-Torres J.   +2 more
europepmc   +1 more source

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Carbon isotopes in mollusk shell carbonates

Geo-Marine Letters, 2008
Mollusk shells contain many isotopic clues about calcification physiology and environmental conditions at the time of shell formation. In this review, we use both published and unpublished data to discuss carbon isotopes in both bivalve and gastropod shell carbonates.
Ted A. McConnaughey, David Paul Gillikin
openaire   +2 more sources

Enrichment of geogenic ammonium in Quaternary alluvial-lacustrine aquifer systems: Evidence from carbon isotopes and DOM characteristics.

Environmental Science and Technology, 2020
Geogenic ammonium in groundwater owing to mineralization of natural organic matter (NOM) has been reported in different geologic settings, but detailed mechanisms responsible for high ammonium concentration levels are poorly understood.
Yao Du, Yamin Deng, T. Ma, Yu Xu, Yanqiu Tao, Yanwen Huang, Rui Liu, Yan-xin Wang   +7 more
semanticscholar   +1 more source

Carbon isotopes in clastic rocks and the Neoproterozoic carbon cycle

American Journal of Science, 2020
It has been proposed that isotopically light inorganic carbon precipitated diagenetically in clastic sediments can explain the large carbon isotopic excursions recorded in Neoproterozoic carbonates.
D. Canfield, A. Knoll, S. Poulton, G. Narbonne, G. Dunning   +4 more
semanticscholar   +1 more source

Stable carbon isotopes in paleoceanography: atmosphere, oceans, and sediments

Earth-Science Reviews, 2019
Carbon is one of the key elements in organisms and non-living compounds on Earth. Carbon dioxide and methane are important greenhouse gases in the atmosphere, dissolved inorganic (DIC) and organic carbon (DOC) determine water biogeochemistry, and ...
A. Mackensen, G. Schmiedl
semanticscholar   +1 more source

Carbon and hydrogen isotopes of methane, ethane, and propane: A review of genetic identification of natural gas

Earth-Science Reviews, 2019
The genetic identification of different types of natural gas is notably important for assessment of its sources and exploration potential. The chemical and isotopic (C and H, in particular) compositions of natural gas vary significantly due to the ...
Quanyou Liu, Xiaoqi Wu, Xiaofeng Wang, Zhijun Jin, Dongya Zhu, Q. Meng, Shipeng Huang, Jiayi Liu, Q. Fu   +8 more
semanticscholar   +1 more source

Carbon isotopes as tracers of dissolved organic carbon sources and water pathways in headwater catchments

Journal of Hydrology, 2011
T. Lambert, anne-catherine pierson-wickmann, G. Gruau, J. Thibault, A. Jaffrezic   +4 more
semanticscholar   +3 more sources