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Hydroxyl radical-induced photochemical formation of dicarboxylic acids from unsaturated fatty acid (oleic acid) in aqueous solution
| Title: | Hydroxyl radical-induced photochemical formation of dicarboxylic acids from unsaturated fatty acid (oleic acid) in aqueous solution |
| Authors: | Tedetti, Marc Browse this author | | Kawamura, Kimitaka Browse this author →KAKEN DB | | Narukawa, Masahiro Browse this author | | Joux, Fabien Browse this author | | Charrière, Bruno Browse this author | | Sempéré, Richard Browse this author |
| Keywords: | Oleic acid | | Dicarboxylic acids | | Hydroxyl radical | | Nitrate | | UV-B radiation |
| Issue Date: | 30-Apr-2007 |
| Publisher: | Elsevier B.V. |
| Journal Title: | Journal of Photochemistry and Photobiology A Chemistry |
| Volume: | 188 |
| Issue: | 1 |
| Start Page: | 135 |
| End Page: | 139 |
| Publisher DOI: | 10.1016/j.jphotochem.2006.11.029 |
| Abstract: | In this study, we assess under laboratory controlled conditions the direct and hydroxyl radical (OH)-induced photochemical production of low molecular weight (LMW) dicarboxylic acids and related compounds (C2–C9) (DCAs) from oleic acid (cis-9-octadecenoic, Δ9C18) in aqueous solution. Nitrate (NO3−)-amended and unamended oleate solutions were irradiated under ultraviolet-B radiation (UV-B, 313 nm) for 5 h, with NO3− being the source of OH. The OH-induced photochemical production of DCAs (C2di–C9di) (170 ± 26 nM h−1) was much higher than that induced by the direct effect of UV-B (33 ± 22 nM h−1), accounting for approximately 85% of the total (direct + OH-induced) photochemical production of DCAs (C2di–C9di) (198 ± 15 nM h−1). Azelaic acid (C9di) was the dominant photoproduct (comprising 63 and 44% of DCAs in the direct and OH-induced photochemical production, respectively) followed by C8di, C7di and C6di, whereas shorter chain compounds (C2di–C5di) were minor produced species. Using our estimate of OH photoproduction (P-OH in nM h−1), the production of C9di from 50 μM of oleic acid was evaluated at 45 nM (nM OH)−1. |
| Relation: | http://www.sciencedirect.com/science/journal/10106030 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/26169 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 河村 公隆
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