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| Titel |
Nanoparticle formation by ozonolysis of inducible plant volatiles |
| VerfasserIn |
J. Joutsensaari, M. Loivamäki, T. Vuorinen, P. Miettinen, A.-M. Nerg, J. K. Holopainen, A. Laaksonen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 5, no. 6 ; Nr. 5, no. 6 (2005-06-16), S.1489-1495 |
| Datensatznummer |
250002900
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| Publikation (Nr.) |
 copernicus.org/acp-5-1489-2005.pdf |
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| Zusammenfassung |
| We present the first laboratory experiments of aerosol formation
from oxidation of volatile organic species emitted by living
plants, a process which for half a century has been known to take
place in the atmosphere. We have treated white cabbage plants with
methyl jasmonate in order to induce the production of monoterpenes
and certain less-volatile sesqui- and homoterpenes. Ozone was
introduced into the growth chamber in which the plants were
placed, and the subsequent aerosol formation and growth of
aerosols were monitored by measuring the particle size
distributions continuously during the experiments. Our
observations show similar particle formation rates as in the
atmosphere but much higher growth rates. The results indicate that
the concentrations of nonvolatile oxidation products of plant
released precursors needed to induce the nucleation are roughly an
order-of-magnitude higher than their concentrations during
atmospheric nucleation events. Our results therefore suggest that
if oxidized organics are involved
in atmospheric nucleation events, their role is to participate
in the growth of pre-existing molecular clusters rather than to form
such clusters through homogeneous or ion-induced nucleation. |
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