Nitrogen isotope fractionation of amino acids from a controlled study on the green turtle (Chelonia mydas): expanding beyond Glx/Phe for trophic position

2020 ◽  
Vol 167 (10) ◽  
Author(s):  
Garrett E. Lemons ◽  
Rebecca L. Lewison ◽  
Jeffrey A. Seminoff ◽  
Christina M. Coppenrath ◽  
Brian N. Popp
Keyword(s):  
Amino Acids ◽  
Green Turtle ◽  
Isotope Fractionation ◽  
Trophic Position ◽  
Nitrogen Isotope ◽  
Chelonia Mydas ◽  
Controlled Study ◽  
Nitrogen Isotope Fractionation

scholarly journals Carbon and nitrogen isotope fractionation of amino acids in an avian marine predator, the gentoo penguin ( Pygoscelis papua )

2015 ◽  
Vol 5 (6) ◽  
pp. 1278-1290 ◽  
Author(s):  
Kelton W. McMahon ◽  
Michael J. Polito ◽  
Stephanie Abel ◽  
Matthew D. McCarthy ◽  
Simon R. Thorrold
Keyword(s):  
Amino Acids ◽  
Isotope Fractionation ◽  
Nitrogen Isotope ◽  
Gentoo Penguin ◽  
Pygoscelis Papua ◽  
Carbon And Nitrogen ◽  
Marine Predator ◽  
Nitrogen Isotope Fractionation

Nitrogen isotope fractionation during the reduction of NO3− to NH4+ by Desulfovibrio sp.

1983 ◽  
Vol 29 (2) ◽  
pp. 231-234 ◽  
Author(s):  
R. G. L. McCready ◽  
W. D. Gould ◽  
R. W. Barendregt
Keyword(s):  
Isotope Fractionation ◽  
Nitrogen Isotope ◽  
Initial Sample ◽  
Minimum Value ◽  
Nitrogen Isotope Fractionation ◽  
Reductive Process

Desulfovibrio reduce NO3−to NH4+ via a dissimilatory pathway. In 21 days, four strains of Desulfovibrio reduced 36–48% of the available NO3− to ammonium. During this reductive process extensive nitrogen isotope fractionation occurred: the product NH4+ was enriched in 15N in the initial sample, then became enriched in 14N to a minimum value at approximately 20–25% reaction, and then became isotopically heavier as the reaction proceeded.

Substituent Effects on Nitrogen Isotope Fractionation During Abiotic Reduction of Nitroaromatic Compounds

2008 ◽  
Vol 42 (6) ◽  
pp. 1997-2003 ◽  
Author(s):  
Thomas B. Hofstetter ◽  
Anke Neumann ◽  
William A. Arnold ◽  
Akané E. Hartenbach ◽  
Jakov Bolotin ◽  
...  
Keyword(s):  
Isotope Fractionation ◽  
Substituent Effects ◽  
Nitrogen Isotope ◽  
Nitroaromatic Compounds ◽  
Nitrogen Isotope Fractionation ◽  
Abiotic Reduction

scholarly journals Mineral identity, natural organic matter, and repeated contaminant exposures do not affect the carbon and nitrogen isotope fractionation of 2,4-dinitroanisole during abiotic reduction

2019 ◽  
Vol 21 (1) ◽  
pp. 51-62 ◽  
Author(s):  
Matthew J. Berens ◽  
Bridget A. Ulrich ◽  
Jennifer H. Strehlau ◽  
Thomas B. Hofstetter ◽  
William A. Arnold
Keyword(s):  
Organic Matter ◽  
Carbon Isotopes ◽  
Natural Organic Matter ◽  
Isotope Fractionation ◽  
Nitrogen Isotope ◽  
Carbon And Nitrogen ◽  
Nitrogen Isotope Fractionation ◽  
Abiotic Reduction ◽  
Hydrolysis Reactions

The fractionation of nitrogen and carbon isotopes during the reduction of 2,4-dinitroanisole is substantially different than that observed for hydrolysis reactions.

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