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The spatial concentration gradient of volatile terpenes near the surface of spruce needles was determined. The gradient comprised four orders of magnitude in the distance of 0 to 0.2 mm. The reaction of ozone with terpenes in this surface region was estimated. Within a diffusion limited reaction time of 1.4 milliseconds the chemical conversion amounts to one per thousand. Therefore it is not expected that one will find exceptional high concentrations of phytotoxic ozonolysis products, peroxides for example, in this micro environment.

zeitschrift für naturforschung c

Umsetzungsrate von Ozon mit flüchtigen Terpenen im Oberflächenbereich von Koniferennadeln / Conversion Rate of Ozone with Volatile Terpenes in the Surface Region of Conifer Needles