title: [Extraction of thermolabile compounds with supercritical gases.].
abstract: The thermolabile acoragermacrone and other sesquiterpenes could be extracted with supercritical carbon dioxide from beta-asarone free calamus rhizomes ( Acorus calamus L. var. americanus Wulff. A usual steam distillation lets this substance partly decompose into shyobunone. By using high pressure extraction with fractionated separation a higher yield of the bitter principles of calamus, acorone and isoacorone, is obtained.
authors.affiliation: Pharmakognosie und Analytische Phytochemie der Universität des Saarlandes, Saarbrücken, Bundesrepublik Deutschland.
authors.forename: E
authors.initials: E
authors.lastname: Stahl
authors.forename: K
authors.initials: K
authors.lastname: Keller