Production of hydrogen peroxide in forest air by reaction of ozone with terpenes

Becker, K. H.; Brockmann, Klaus J.; Bechara, J.

doi:10.1038/346256a0

Cited by 159 publications

(122 citation statements)

References 20 publications

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“…If there are no sources within the NBL and deposition is assumed to be the only sink, deposition is responsible for the decrease in concentration. Although peroxy radicals and peroxides are thought to be formed from the reaction of ozone with terpenes [Becker et al, 1990], O 3 concentrations were too low to generate any appreciable amount of H202 at night. Reactions between terpenes and NO3 are assumed to have been negligible.…”

Section: Verification Of Nighttime Resultsmentioning

confidence: 99%

“…They are also thought to be formed as a result of the ozonolysis of alkenes, either through radical generation [Paulson et al, 1992] or via a radical-free pathway [Becker et al, 1990]. Loss pathways include photolysis, reaction with OH, incorporation into cloud water, reaction on aerosols, and deposition.…”

Section: Ho2 + Ho2 • H202 + 02 (1) Ho2 + Ro2--> Rooh + 02 (2)mentioning

confidence: 99%

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Measurements of the dry deposition of peroxides to a Canadian boreal forest

Hall¹,

Claiborn²

1997

J. Geophys. Res.

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Abstract. The dry deposition rates of hydrogen peroxide (H202) and total organic peroxides (ROOH) were measured above a coniferous forest in Saskatchewan, Canada. Deposition velocities Vd were obtained from gradient measurements using the modified Bowen ratio method. A diurnal pattern was observed, with highest deposition velocities occurring during the day. Daytime deposition velocities were approximately 5 cm s -• for H20 2 and 1.6 cm s -• for ROOH. Nighttime deposition velocities were much smaller, approximately 1 and 0.5 cm s -•, respectively. A slight seasonal trend observed in vd can be attributed to meteorological rather than physiological factors. The seasonal variation of H20 2 and ROOH concentrations, however, effects a significant seasonal variation in flux. Highest concentrations and therefore highest fluxes were observed during midsummer. On a diurnal scale, maximum deposition velocities coincide with high concentrations only during midday. Thus the highest fluxes occur primarily from 1100 to 1500 hours. The transport of H20 2 appears to be similar to that of other soluble, reactive trace gases, such as HNO 3 and NH3, and a small surface resistance is suspected.

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Section: Verification Of Nighttime Resultsmentioning

confidence: 99%

Section: Ho2 + Ho2 • H202 + 02 (1) Ho2 + Ro2--> Rooh + 02 (2)mentioning

confidence: 99%

Measurements of the dry deposition of peroxides to a Canadian boreal forest

Hall¹,

Claiborn²

1997

J. Geophys. Res.

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“…1−11 In particular, the decomposition of α-hydroxyalkyl hydroperoxide (HHP), which is produced in the Criegee intermediate reaction with water, 30,42 serves as the principal mechanism for nonphotochemical H 2 O 2 formation (Scheme 1). [4][5][6]31,32 The decomposition of HHPs to yield carbonyl compounds or carboxylic acids also has significant industrial promise. 43 Further, there have been reports 7,23 suggesting that HHP decomposition can provide an additional source of atmospheric ·OH, although this topic remains controversial.…”

Section: Introductionmentioning

confidence: 99%

Role of Tunable Acid Catalysis in Decomposition of α-Hydroxyalkyl Hydroperoxides and Mechanistic Implications for Tropospheric Chemistry

et al. 2014

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Electronic structure calculations have been used to investigate possible gasphase decomposition pathways of α-hydroxyalkyl hydroperoxides (HHPs), an important source of tropospheric hydrogen peroxide and carbonyl compounds. The uncatalyzed as well as waterand acid-catalyzed decomposition of multiple HHPs have been examined at the M06-2X/augcc-pVTZ level of theory. The calculations indicate that, compared to an uncatalyzed or watercatalyzed reaction, the free-energy barrier of an acid-catalyzed decomposition leading to an aldehyde or ketone and hydrogen peroxide is dramatically lowered. The calculations also find a direct correlation between the catalytic effect of an acid and the distance separating its hydrogen acceptor and donor sites. Interestingly, the catalytic effect of an acid on the HHP decomposition resulting in the formation of carboxylic acid and water is relatively much smaller. Moreover, since the free-energy barrier of the acid-catalyzed aldehyde-or ketoneforming decomposition is ∼25% lower than that required to break the O−OH linkage of the HHP leading to the formation of hydroxyl radical, these results suggest that HHP decomposition is likely not an important source of tropospheric hydroxyl radical. Finally, transition state theory estimates indicate that the effective rate constants for the acid-catalyzed aldehyde-or ketone-forming HHP decomposition pathways are 2− 3 orders of magnitude faster than those for the water-catalyzed reaction, indicating that an acid-catalyzed HHP decomposition is kinetically favored as well.

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“…Terpenes can react with atmospheric ozone inducing hydrogen peroxide, a highly reactive oxygen species (Becker et al, 1990). In the same way, α-pinene, a monoterpene, can cause oxidative damage (Singh et al, 2006).…”

Section: Toxicological Studies Of Extracts Of C Braziliensismentioning

confidence: 99%

Mutagenicity, genotoxicity, and scavenging activities of extracts from the soft coral Chromonephthea braziliensis: a possibility of new bioactive compounds

Carpes¹,

Fleury²,

Lages³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. Coral reefs are diverse ecosystems that have a high density of biodiversity leading to intense competition among species. These species may produce unknown substances, many with pharmacological value. Chromonephthea braziliensis is an invasive soft coral from the Indo-Pacific Ocean that is possibly transported by oil platforms and whose presence can be a threat to a region's biodiversity. This species produces secondary metabolites that are responsible for inducing damage to the local ecosystem. In the present study, extracts were prepared from dried colonies of C. braziliensis (solvents: hexane, dichloromethane, ethyl acetate, and methanol). We evaluated their mutagenicity using the Salmonella reverse mutation assay (TA97, TA98, TA100, and TA102 strains), their genotoxicity using the DNA breakage analysis and micronucleus assay, and scavenging activity using the 1,1-diphenyl-2-picrylhydrazyl-free radical assay. Cytotoxicity and mutagenicity were not observed for any of the extracts. Genotoxicity was observed for the dichloromethane, ethyl acetate, and methanol extracts at high concentrations, but no DNA damage was observed in the micronucleus assay. Scavenging activity was not detected.

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Production of hydrogen peroxide in forest air by reaction of ozone with terpenes

Cited by 159 publications

References 20 publications

Measurements of the dry deposition of peroxides to a Canadian boreal forest

Measurements of the dry deposition of peroxides to a Canadian boreal forest

Role of Tunable Acid Catalysis in Decomposition of α-Hydroxyalkyl Hydroperoxides and Mechanistic Implications for Tropospheric Chemistry

Mutagenicity, genotoxicity, and scavenging activities of extracts from the soft coral Chromonephthea braziliensis: a possibility of new bioactive compounds

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