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Food Chemistry, ISSN 0308-8146, 09/2019, Volume 293, pp. 545 - 549
Chymosin is a protease that curdles the milk casein. Animal rennet was the first discovered source of chymosin and its use is mandatory for the production of... 
PDO cheese | δ15N | Rennet | IRMS | Chymosin
Journal Article
Science of the Total Environment, ISSN 0048-9697, 12/2019, Volume 696, p. 133988
In order to trace changes in atmospheric nitrogen sources in Guiyang (SW China) from 2006 to 2016–2017, tissue nitrogen content and bulk stable isotope (δ N)... 
δ15N | Nitrogen content | Nitrogen deposition | Nitrogen sources | Epilithic mosses
Journal Article
Geochimica et Cosmochimica Acta, ISSN 0016-7037, 06/2019, Volume 254, pp. 67 - 85
Developing high-resolution, well-dated, marine proxies of environmental, climatic, and oceanographic conditions is critical in order to advance our... 
Paleoclimate | δ15N | Amino acids | Arctica islandica | Ocean circulation
Journal Article
Agriculture, Ecosystems and Environment, ISSN 0167-8809, 11/2019, Volume 283, p. 106570
During the past 20 years there have been major advances in the application of N natural abundance ( ) measurements to trace the pathways and magnitudes of N... 
Compost | Soils | NH3 | Animal excreta | δ15N | N2O | Fertilizers
Journal Article
Estuarine, Coastal and Shelf Science, ISSN 0272-7714, 12/2013, Volume 135, pp. 77 - 85
FishBase, a relational database freely available on the Internet, is to date widely used as a source of quantitative information on the trophic position of... 
fish trophic position | δ15N | isotopic baseline | food web | lagoon | Isotopic baseline | Food web | Lagoon | Fish trophic position
Journal Article
Ecological Indicators, ISSN 1470-160X, 01/2020, Volume 108, p. 105743
Anthropogenic inputs are affecting freshwaters. Stable isotope ratios of nitrogen (δ N) are useful to track anthropogenic pollution in food webs across... 
Fish | δ15N | Anthropogenic pollution | Sewage | Freshwater reservoir
Journal Article
Catena, ISSN 0341-8162, 01/2019, Volume 172, pp. 285 - 294
Significant relationships have been observed between soil N isotopic natural abundance (δ N) and both climate and soil characteristics across a large range of... 
C:N ratio | δ15N | Soil N | Forest soils
Journal Article
Agriculture, Ecosystems and Environment, ISSN 0167-8809, 02/2014, Volume 184, pp. 158 - 167
High application rates of farmyard manure on grasslands generally results in nitrogen (N) losses and a shift in N isotope composition. The aim of this study... 
Grassland | δ15N | Management | N balance
Journal Article
Ecological Indicators, ISSN 1470-160X, 06/2019, Volume 101, pp. 1086 - 1093
Nitrogen isotope ratios (δ N) in plants and soil are widely known as indicators of the N cycle in terrestrial ecosystem. Recent studies have proposed that the... 
Soil δ15N | Mongolia | Hokkaido | Foliage δ15N | Larch | Fir
Journal Article
Applied Soil Ecology, ISSN 0929-1393, 01/2014, Volume 73, pp. 124 - 129
The objective of this study was to investigate the application of the N natural abundance technique to quantify BNF inputs to different varieties of... 
δ15N | Saccharum spp | BNF | Soil depth
Journal Article
Science of the Total Environment, ISSN 0048-9697, 01/2016, Volume 542, pp. 306 - 314
To determine the dominant nitrogen sources and select effective macroalgal species for monitoring eutrophication along the Yantai coast, the total carbon... 
Yantai coast | δ15N | DIN sources | Indicator | Macroalgae
Journal Article
Ecological Indicators, ISSN 1470-160X, 07/2018, Volume 90, pp. 179 - 183
δ N concentration can reveal the anthropogenic pollution of an ecosystem. To study this pollution level, this isotope can be analyzed from water or animal... 
δ15N | Pollution | Anemonia sulcata | Bioindicator | Sewage pipe
Journal Article
Marine Pollution Bulletin, ISSN 0025-326X, 11/2019, p. 110628
Journal Article
Science of the Total Environment, ISSN 0048-9697, 2019, Volume 687, p. 77
The spatiotemporal trends of mercury (Hg) are crucial for the understanding of this ubiquitous and toxic contaminant. However, uncertainties often arise from... 
δ13C | Naturvetenskap | Man and the environment | Naturmiljö och människan | δ15N | Natural Sciences
Journal Article
Soil Biology and Biochemistry, ISSN 0038-0717, 11/2018, Volume 126, pp. 191 - 193
Nitrogen fertilizer use efficiency can be estimated by using N enriched or N depleted synthetic fertilizers. However, it has also been proposed that... 
δ15N | Fertilizer use efficiency | Nitrogen fertilizer | 15N natural abundance | N natural abundance
Journal Article
Geoderma, ISSN 0016-7061, 03/2018, Volume 313, pp. 126 - 134
Grass pasture rundown results from a depleted store of soil mineral nitrogen (N) over time. In these systems, mineral N is retained in the standing plant... 
Total soil nitrogen | δ15N | Grazing agro-ecosystems | Legume-grass pastures | Leucaena leucocephala
Journal Article
Chemical Geology, ISSN 0009-2541, 01/2014, Volume 363, pp. 91 - 100
We analyzed δ N in both acid-treated and untreated sediment profiles from McMurdo Sound of the Ross Sea region, East Antarctica that were influenced by penguin... 
Abandoned colony | Ornithogenic sediments | δ15N | East Antarctica | Adélie penguin
Journal Article
Journal of Fish Biology, ISSN 0022-1112, 12/2019, Volume 95, Issue 6, pp. 1535 - 1539
The effects of anticoagulant EDTA and sodium heparin (SH) on stable carbon δ13C and nitrogen δ15N isotopic values of red blood cells (RBC) and blood plasma in... 
blood preservatives | δ15N | δ13C | blood plasma | red blood cells (RBC) | Carcharhinus melanopterus
Journal Article
Ecotoxicology and Environmental Safety, ISSN 0147-6513, 10/2019, Volume 182, p. 109358
Organochlorine pesticides (OCPs) are ubiquitous environmental contaminants, while their correlations with δ N values and fatty acids (FAs) in fish tissues... 
Fish tissue | OCPs | δ15N value | Dongting lake | Fatty acids | N value
Journal Article