Results 41 to 50 of about 173,935 (289)

Tracing the source of soil organic matter eroded from temperate forest catchments using carbon and nitrogen isotopes [PDF]

, 2016
Soil erosion continuously redistributes soil and associated soil organic matter (SOM) on the Earth's surface, with important implications for biogeochemical cycling of essential elements and terrestrial carbon sequestration.
Berhe, AA, Fogel, ML, Hart, SC, Hunsaker, CT, Johnson, DW, McCorkle, EP, McFarlane, KJ   +6 more
core   +1 more source

Hydroclimate variability from western Iberia (Portugal) during the Holocene: insights from a composite stalagmite isotope record [PDF]

, 2020
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Thatcher, D. L., Wanamaker, A. D., Denniston, R. F., Asmerom, Y., Polyak, V.
Asmerom, Yemane, Denniston, Rhawn, Fullick, Daniel, Gillikin, David, Haws, Jonathan, Polyak, Victor, Thatcher, Diana, Ummenhofer, Caroline, Wanamaker, Alan, Wanamaker, Alan   +9 more
core   +3 more sources

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

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

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]

, 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
Biggs B., Lester P. J., Main M. L.
core   +2 more sources

Research on the Identification of Matheran Wine Region in the East Foot of Helan Mountain

Shipin gongye ke-ji
Objective: To explore the feasibility of using stable carbon and oxygen isotopes and mineral elements in small-scale regional wine production identification, the fractionation characteristics of stable isotopes of carbon and oxygen in wine of Matheran ...
Jianrong KAI, Haiyan MA, Wei ZHANG, Xiang CHEN, Caiyan WANG, Jing ZHANG, Caihong LI, Qian GE   +7 more
doaj   +1 more source

Carbon and alkalinity outwelling across the groundwater‐creek‐shelf continuum off Amazonian mangroves

Limnology and Oceanography Letters, 2021
Lateral fluxes (i.e., outwelling) of dissolved organic (DOC) and inorganic (DIC) carbon and total alkalinity were estimated using radium isotopes at the groundwater, mangrove creek, and continental shelf scales in the Amazon region.
Alex Cabral, Thorsten Dittmar, Mitchell Call, Jan Scholten, Carlos E. deRezende, Nils Asp, Martha Gledhill, Michael Seidel, Isaac R. Santos   +8 more
doaj   +1 more source

Observation of a low-lying neutron-unbound state in 19C

, 2013
Proton removal reactions from a secondary 22N beam were utilized to populate unbound states in neutron-rich carbon isotopes. Neutrons were measured with the Modular Neutron Array (MoNA) in coincidence with carbon fragments.
Badger, N. S., Baumann, T., Bazin, D., Bennett, M., Brown, J., Christian, G., DeYoung, P. A., Finck, J. E., Gardner, M., Hook, E. A., Luther, B., Meyer, D. A., Mosby, M., Mosby, S., Rogers, W. F., Smith, J. K., Spyrou, A., Strongman, M. J., Thoennessen, M.   +18 more
core   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Pyrolysis experiment and reservoir-forming potential of epimetamorphic rock

Petroleum Exploration and Development, 2009
By taking pyrolysis experiments and analyzing composition and carbon isotopes of pyrolysis products, the hydrocarbon generation potential and products geochemistry of very low-grade epimetamorphic rocks were studied.
Yang Chun, Dai Jinxing, Chen Hanlin, Luo Xia, Zheng Junwei   +4 more
doaj   +1 more source