Ozonation of selected molecules constituting cellular matter

Journal Article · Sat Jun 01 00:00:00 EDT 1991 · Ozone: Science and Engineering (The Journal of the International Ozone Association); (United States)

DOI:https://doi.org/10.1080/01919519108552467· OSTI ID:5820722

Nompex, P; Dore, M; De Latt, J; Bawa, M; Legube, B ^[1]

---

1. Ecole Superieure d'Ingenieurs de Poiters (France)

Ozonation of purine and pyrimidine bases and of carbohydrates was studied in laboratory experiments. The results showed that nucleobases are much more reactive with molecular ozone in aqueous solution than carbohydrates. Second order rate constants for direct reaction of ozone on purines (adenine and guanine) and on pyrimidines (cytosine, thymine and uracil) ranged from 0.76 {times} 10{sup 3} to 6.8 {times} 10{sup 3} M{sup {minus}1}s{sup {minus}1} at 2 C. The difference of reactivity between these solutes may be attributed to their substituents. As far as carbohydrates are concerned, direct reactions of ozone are very slow (k{sub O3} {approx} 0.1 - 0.3 M{sup {minus}1}s{sup {minus}1}) at 20 C, and the results indicated that free radical reactions are predominant in the degradation pathway of carbohydrates by ozone. Some ozonation by-products of monosaccharides (glucose, xylose) and disaccharides (cellobiose) also were identified in this study by means of GC/MS analyses.

• OSTI ID: 5820722
• Journal Information: Ozone: Science and Engineering (The Journal of the International Ozone Association); (United States), Vol. 13:3; ISSN 0191-9512
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CELL CONSTITUENTS
CHEMICAL REACTION KINETICS
OZONE
CARBOHYDRATES
DECOMPOSITION
PURINES
PYRIMIDINES
RADICALS
AROMATICS
AZAARENES
AZINES
CHEMICAL REACTIONS
HETEROCYCLIC COMPOUNDS
KINETICS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
REACTION KINETICS
560300* - Chemicals Metabolism & Toxicology