Usai, Marianna and Atzei, Aldo Domenico and Pintore, Giorgio Antonio Mario and Casanova, Joseph (2003) Composition and variability of the essential oil of Sardinian Thymus herba-barona Loisel. Flavour and Fragrance Journal, Vol. 18 (1), p. 21-25. ISSN 0882-5734. Article.
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The essential oils from nine wild populations of the Sardinian Thymus herba-barona Loisel (Labiatae) were chemically characterized to identify the different chemotypes. GC and GC-MS analysis showed that in Sardinia only two chemotypes (thymol and carvacrol) are present. The carvacrol chemotype is predominant and this compound was found in high concentration (50.7-79.4%) in seven of the nine populations studied. The thymol chemotype was found in only two populations (34.2-56.2%). Analyses also showed that the other main components of the oils of T. herba-barona, were 3-heptanone (1.4-5.6%), 3-octanone (1.4-5.5%) and borneol (2.5-8.3%). p-Cymene is present at 1.2-5.6% but is not present in plants from the Tonara medium station, where O-cymene (1.9%) is present instead.
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