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Kinetic nitrogen isotope effects of 18 amino acids degradation during burning processes

dc.contributor.authorRen-Guo Zhu
dc.contributor.authorHua-Yun Xiao
dc.contributor.authorMeiju Yin
dc.contributor.authorHao Xiao
dc.contributor.authorZhongkui Zhou
dc.contributor.authorGuo Wei
dc.contributor.authorCheng Liu
dc.contributor.authorCaixia Hu
dc.contributor.otherJiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, East China University of Technology
dc.contributor.otherSchool of Agriculture and Biology, Shanghai Jiao Tong University
dc.contributor.otherSchool of Agriculture and Biology, Shanghai Jiao Tong University
dc.contributor.otherSchool of Agriculture and Biology, Shanghai Jiao Tong University
dc.contributor.otherSchool of Water Resources and Environmental Engineering, East China University of Technology
dc.contributor.otherJiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, East China University of Technology
dc.contributor.otherJiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, East China University of Technology
dc.contributor.otherJiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, East China University of Technology
dc.date.accessioned2024-06-30T11:16:53Z
dc.date.accessioned2025-10-08T08:27:05Z
dc.date.available2025-10-08T08:27:05Z
dc.date.issued01-06-2024
dc.identifier.urihttp://digilib.fisipol.ugm.ac.id/repo/handle/15717717/35915
dc.description.abstractAbstract Understanding the nitrogen isotopic variations of individual amino acids (AAs) is essential for utilizing the nitrogen isotope values of individual amino acids (δ15N-AA) as source indicators to identify proteinaceous matter originating from biomass combustion processes. However, the nitrogen isotope effects (ε) associated with the degradation of individual amino acids during combustion processes have not been previously explored. In this study, we measured the nitrogen isotope values of residual free amino acids -following a series of controlled combustion experiments at temperatures of 160–240 °C and durations of 2 min to 8 h, as described in Part 1. δ15N values of proline, aspartate, alanine, valine, glycine, leucine, and isoleucine are more positive than their initial δ15N values after prolonged combustion. Variations in δ15N values of the most AAs conform to the Rayleigh fractionation during combustion and their nitrogen isotope effects (ε) are greatly impacted by their respective combustion degradation pathways. This is the first time the ε values associated with the degradation pathways of AAs during combustion have been characterized. Only the ε values associated with Pathway 1 (dehydration to form dipeptide) and 2 (simultaneous deamination and decarboxylation) are found to be significant and temperature-dependent, ranging from + 2.9 to 6.4‰ and + 0.9‰ to + 3.8‰, respectively. Conversely, ε values associated with other pathways are minor. This improves the current understanding on the degradation mechanisms of protein nitrogen during biomass burning.
dc.language.isoEN
dc.publisherNature Portfolio
dc.subject.lccMedicine
dc.titleKinetic nitrogen isotope effects of 18 amino acids degradation during burning processes
dc.typeArticle
dc.description.keywordsNitrogen isotope effects
dc.description.keywordsCompound-specific nitrogen isotope
dc.description.keywordsAmino acids
dc.description.keywordsDegradation pathways
dc.description.pages1-16
dc.description.doi10.1038/s41598-024-65544-w
dc.title.journalScientific Reports
dc.identifier.e-issn2045-2322
dc.identifier.oaiaf23165cbd514381aa616682447bc76a
dc.journal.infoVolume 14, Issue 1


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