{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Jaoui M"],"funding":["Intramural EPA","US Environmental Protection Agency"],"pagination":["145592"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8363757"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["775"],"pubmed_abstract":["Recently, we identified seven novel hydroxy-carboxylic acids resulting from gas-phase reactions of isoprene in the presence of nitrogen oxides (NO<sub>x</sub>), ozone (O<sub>3</sub>), and/or hydroxyl radicals (OH). In the present study, we provide evidence that hydroxy-carboxylic acids, namely methyltartaric acids (MTA) are: (1) reliable isoprene tracers, (2) likely produced via rapid peroxy radical hydrogen atom (H) shift reactions (autoxidation mechanism) and analogous alkoxy radical H shifts in low and high NO<sub>x</sub> environments respectively and (3) representative of aged ambient aerosol in the low NO<sub>x</sub> regime. Firstly, MTA are reliable tracers of isoprene aerosol because they have been identified in numerous chamber experiments involving isoprene conducted under a wide "],"journal":["The Science of the total environment"],"pubmed_title":["Rapid production of highly oxidized molecules in isoprene aerosol via peroxy and alkoxy radical isomerization pathways in low and high NO&lt;sub&gt;x&lt;/sub&gt; environments: Combined laboratory, computational and field studies."],"pmcid":["PMC8363757"],"funding_grant_id":["EPA999999"],"pubmed_authors":["Kleindienst TE","Szmigielski R","Lewandowski M","Piletic IR","Riedel TP","Jaoui M","Rudzinski KJ"],"additional_accession":[]},"is_claimable":false,"name":"Rapid production of highly oxidized molecules in isoprene aerosol via peroxy and alkoxy radical isomerization pathways in low and high NO&lt;sub&gt;x&lt;/sub&gt; environments: Combined laboratory, computational and field studies.","description":"Recently, we identified seven novel hydroxy-carboxylic acids resulting from gas-phase reactions of isoprene in the presence of nitrogen oxides (NO<sub>x</sub>), ozone (O<sub>3</sub>), and/or hydroxyl radicals (OH). In the present study, we provide evidence that hydroxy-carboxylic acids, namely methyltartaric acids (MTA) are: (1) reliable isoprene tracers, (2) likely produced via rapid peroxy radical hydrogen atom (H) shift reactions (autoxidation mechanism) and analogous alkoxy radical H shifts in low and high NO<sub>x</sub> environments respectively and (3) representative of aged ambient aerosol in the low NO<sub>x</sub> regime. Firstly, MTA are reliable tracers of isoprene aerosol because they have been identified in numerous chamber experiments involving isoprene conducted under a wide ","dates":{"release":"2021-01-01T00:00:00Z","publication":"2021 Jun","modification":"2026-05-09T03:20:04.539Z","creation":"2025-02-19T02:58:41.342Z"},"accession":"S-EPMC8363757","cross_references":{"pubmed":["34380608"],"doi":["10.1016/j.scitotenv.2021.145592"]}}