Results 101 to 110 of about 95,714 (157)

Snapshots of Coastal Ecology Using Multiproxy Analysis Reveals Insights Into the Preservation of Swamp and Marsh Environments Since the Late Pleistocene

Geochemistry, Geophysics, Geosystems
The southeastern United States Coastal Plain ecosystem contains baldcypress (Taxodium distichum) swamps and grass‐dominated marshes. These ecosystems also occurred on the exposed continental shelf during lower sea levels but are rarely preserved due to ...
Kendall Fontenot, Kristine L. DeLong, Brian A. Schubert, Sophie Warny, Davin J. Wallace, Carrie M. Miller, Erin Culver‐Miller, Michael J. Polito, Carl A. Reese, Kathryn Garretson, Kehui Xu, Grant L. Harley, Jeffrey Obelcz, Kelli L. Moran, Julian Traphagan, Douglas Jones, Alicia Caporaso   +16 more
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Dual-Isotope (δ²H, δ¹⁸O) and Bioelement (δ¹³C, δ¹⁵N) Fingerprints Reveal Atmospheric and Edaphic Drought Controls in Sauvignon Blanc (Orlești, Romania)

Plants
Grapevine water relations are increasingly influenced by drought under climate change, with significant implications for yield, fruit composition and wine quality.
Marius Gheorghe Miricioiu, Oana Romina Botoran, Diana Costinel, Ionuț Făurescu, Roxana Elena Ionete   +4 more
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Research on Production of 15N Isotope with N2 by Gas Diffusion Method

Yuanzineng kexue jishu
There are two natural stable isotopes of nitrogen, 14N and 15N, with isotopic abundances of 99.636% and 0.364%. 15N is widely used in research and analysis in atmospheric tracing, agricultural and forestry research, and origin tracing.
HAN Yilun, ZHOU Mingsheng, WANG Fei
doaj   +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

NITROGEN ISOTOPES IN THERMAL FLUIDS

, 2004
[1] The Jalisco Block (JB) is a geologically and tectonically complex part of northwestern Mexico characterized by active subduction-type volcanism, rifting, and old stable structures. Thermal springs and groups of springs are widely distributed over JB.
Eckhard Faber, Nick Varley, Rocco Favara, Giorgio Capasso, Salvatore Inguaggiato, Yu. A. Taran, F. Grassa   +6 more
openaire   +1 more source

DETECTION OF NITROGEN FIXATION WITH ISOTOPIC NITROGEN

Journal of Biological Chemistry, 1943
R.H. Burris, F.J. Eppling, H.B. Wahlin, P.W. Wilson   +3 more
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FIXATION OF ISOTOPIC NITROGEN BY EXCISED NODULES

Journal of Biological Chemistry, 1947
H A, MACHATA, R H, BURRIS, P W, WILSON
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Nitrogen Isotope Techniques

Choice Reviews Online, 1993
Introduction. Mass Spectrometry. Optical Emmission Spectrometry. Natural Abundance of 15N: Fractional Contribution of Two Sources to a Common Sink an Use of Isotope Discrimination. Nitrogen Fixation in Soil and Plant Systems. Nitrogen Fixation in Flooded Rice Soils, Aquatic and Sediment Systems. Nitrification and Dentrification.
J. I. Sprent, R. Knowles, T. H. Blackburn   +2 more
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Fertilizer nitrogen isotope signatures

Isotopes in Environmental and Health Studies, 2007
There has been considerable recent interest in the potential application of nitrogen isotope analysis in discriminating between organically and conventionally grown crops. A prerequisite of this approach is that there is a difference in the nitrogen isotope compositions of the fertilizers used in organic and conventional agriculture.
Bateman, Alison S., Kelly, Simon D.
openaire   +3 more sources

Anomalous Nitrogen Isotope Ratio in Comets

Science, 2003
High-resolution spectra of the CN B 2 ∑ + – X 2 ∑ + (0,0) band at 390 nanometers yield isotopic ratios for comets C/1995 O1 (Hale-Bopp) and C/2000 WM1 (LINEAR) as follows: 165 ± 40 and 115 ± 20 for 12
Arpigny, Claude, Jehin, Emmanuel, Manfroid, Jean, Hutsemekers, Damien, Schulz, Rita, Stüwe, J. A., Zucconi, Jean-Marc, Ilyin, Ilya   +7 more
openaire   +2 more sources