Results 291 to 300 of about 130,387 (339)

High variability in carbon stable isotopes in the macroalga Ulva spp. and implications for eutrophication indicators. [PDF]

Sci Rep
Lloret J.
europepmc   +1 more source

Fluid inclusions: tiny windows into global paleo-environments. [PDF]

Commun Earth Environ
Bekaert DV, Avice G, Marty B.
europepmc   +1 more source

Prediction of strong Cu(I)-He interaction at open metal sites enables isotope-selective helium adsorption. [PDF]

Nat Commun
Dongmo EG, Das S, Moncada F, Riemer-Wulf T, Heine T.   +4 more
europepmc   +1 more source

Reassessing the nitrogen isotope composition of sediments from the proto-North Atlantic during Oceanic Anoxic Event 2

, 2014
I. Ruvalcaba, Niels A. G. M. van Helmond, I. Tsandev, J.B.M. Middelburg, Caroline P. Slomp   +4 more
openalex   +1 more source

Intramolecularly Labeled Reference Standards of Sulfamethoxazole for Fragment-Specific Isotope Analysis by Electrospray Ionization Orbitrap Mass Spectrometry. [PDF]

J Am Soc Mass Spectrom
Canavan A, Dirr C, Elsner M.
europepmc   +1 more source

Isotopic fractionation of 15N in nitrogen fixation in soybean due to light intensity and Bradyrhizobium spp. strain inoculated

, 2014
Karla Emanuelle Campos Araújo
openalex   +1 more source

CHANGE IN COMPOSITION OF CARBON AND NITROGEN ISOTOPE OF ORGANIC MATTER AND BIOMASS LEAF CROWN AECHMEA AQUILEGA (SALISB.) GRISEB BROMELIACEAE CAATINGA IN, THE ATLANTIC AND AGRESTE SERGIPE.

, 2011
Simone Mesquita Bispo
openalex   +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   +3 more sources

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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
  +4 more sources

Nitrogen Isotopes in Palaeolimnology

2002
Nitrogen is a small but essential constituent of all organisms and as such can be regarded as a key nutrient. Together with phosphorous and silicon, it is commonly viewed as one of the nutrients that ultimately limit organic productivity. Indeed, in many lakes, N is probably the limiting nutrient.
openaire   +1 more source