Effects of spoilage on nitrogen and carbon stable isotopes signatures of the clam Ruditapes decussatus [PDF]
, 2018 Fish and seafood products are highly susceptible to post-mortem spoilage due to autolytic reactions at start, then microbiological activity and eventually oxidative reactions.
A Lucas +23 more
core +1 more source
NITROGEN ISOTOPIC FRACTIONATION IN INTERSTELLAR AMMONIA [PDF]
The Astrophysical Journal, 2010 Using the Green Bank Telescope (GBT), we have obtained accurate measurements of the $^{14}$N/$^{15}$N isotopic ratio in ammonia in two nearby cold, dense molecular clouds, Barnard~1 and NGC 1333. The $^{14}$N/$^{15}$N ratio in Barnard~1, $334 \pm 50$ (3$σ$), is particularly well constrained and falls in between the local interstellar medium/proto-solar
Lis, Darek C. +3 more
openaire +4 more sources
Zinc Isotope Ratios as Indicators of Diet and Trophic Level in Arctic Marine Mammals.
PLoS ONE, 2016 Carbon and nitrogen stable isotope ratios of bone collagen are an established method for dietary reconstruction, but this method is limited by the protein preservation.
Klervia Jaouen +2 more
doaj +1 more source
Seabird Modulations of Isotopic Nitrogen on Islands
PLoS ONE, 2012 The transport of nutrients by migratory animals across ecosystem boundaries can significantly enrich recipient food webs, thereby shaping the ecosystems' structure and function. To illustrate the potential role of islands in enabling the transfer of matter across ecosystem boundaries to be gauged, we investigated the influence of seabirds on nitrogen ...
Caut, Stéphane +9 more
openaire +10 more sources
Sulphur-isotope compositions of pig tissues from a controlled feeding study [PDF]
, 2017 Sulphur-isotope determinations are becoming increasingly useful for palaeodietary reconstruction, but knowledge of isotopic discrimination between diet and various tissues remains inadequate. In this study, we explore the sensitivity of δ34Stissue values
Evershed, Richard P. +6 more
core +2 more sources
Nitrogen Isotopes in Deep Time [PDF]
, 2021 Nitrogen is an essential nutrient for life, and its sources and cycling have varied over earth history. Stable isotope ratios of nitrogen compounds (expressed as δ15N, in ‰) are preserved in the sedimentary record and track these changes, providing important insights into associated biogeochemical feedbacks.
Mettam, Colin, Zerkle, Aubrey L.
openaire +2 more sources
Feeding and growth variations affect δ13C and δ15N budgets during ontogeny in a lepidopteran larva
Peer Community Journal, 2023 Isotopes are widely used in ecology to study food webs and physiology. The fractionation observed between trophic levels in nitrogen and carbon isotopes, explained by isotopic biochemical selectivity, is subject to important within-trophic level ...
Charberet, Samuel M. +4 more
doaj +1 more source
First ice core records of NO3− stable isotopes from Lomonosovfonna, Svalbard [PDF]
, 2014 Samples from two ice cores drilled at Lomonosovfonna, Svalbard, covering the period 1957–2009, and 1650–1995, respectively, were analyzed for NO3− concentrations, and NO3− stable isotopes (δ15N and δ18O).
Björkman, M. P. +8 more
core +1 more source
Joint control of precipitation and CO2 on global long-term patterns of plant nitrogen availability
Nature CommunicationsPlant nitrogen availability critically limits plant growth and thus constrains terrestrial carbon sequestration. Growing evidence points to a recent decline in plant nitrogen availability, yet the global consistency of this trend and its underlying ...
Songbo Tang +3 more
doaj +1 more source
Silicon isotopes as a tracer for silicate utilization in the Peruvian upwelling [PDF]
, 2011 EGU2011-6081 Natural stable isotopes are a powerful tool in marine sciences to investigate biological processes, such as present and past nutrient utilization.
Ehlert, Claudia +3 more
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