Results 231 to 240 of about 121,467 (287)

Carbon and Nitrogen Isotopic Signatures as Metabolic Biomarkers of Nodal Metastasis and Recurrence in Oral Squamous Cell Carcinoma. [PDF]

Cancers (Basel)
Bogusiak K, Popińska Z, Kozakiewicz M, Paneth P, Kobos J.   +4 more
europepmc   +1 more source

The North-Eastern Europe and Northern Asia isotopic dataset of bioarchaeological samples (NEENA). [PDF]

Sci Data
Haponava V, Pickard C, Fernandes R.
europepmc   +1 more source

Stable Isotopes of Carbon and Nitrogen in Female Qamanirjuaq Caribou (<i>Rangifer tarandus groenlandicus</i>) Antlers in Relation to Diet and Physiology. [PDF]

Ecol Evol
Brenning M, Longstaffe FJ, Miller JH, Fraser D.   +3 more
europepmc   +1 more source

Shift of Nitrogen and Carbon Stable Isotopes in Temporary Pond Tadpoles Following the Decline of Large Mammalian Herbivores. [PDF]

Ecol Evol
Ewald N, Demare G, Glos J, Struck U, Rödel MO.   +4 more
europepmc   +1 more source

Dynamic tracking of breastfeeding and weaning in carbon isotopes of tooth enamel. [PDF]

iScience
Kimura Y, Cerling TE, Yamada K, Seki A, Casanovas-Vilar I, Flynn LJ, Jacobs LL.   +6 more
europepmc   +1 more source

Nitrogen isotopes [PDF]

Environmental Science & Technology, 2007
Farrukh Ahmad
exaly   +2 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

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

Nitrogen Isotopes in the Ocean [PDF]

, 2019
This article outlines the isotope systematics of processes in the ocean nitrogen (N) cycle and their impact on the isotopic compositions of the major N forms, with an eye toward how the N isotopes may record current N fluxes and past changes.
Sigman, Daniel M, Fripiat, François
openaire   +2 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