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Progress in Essential Oils
By: Brian M. Lawrence
Posted: December 4, 2007, from the December 2007 issue of P&F magazine.
Rosemary Oil and Extract
Miyazawa et al. (2003) determined that (-)-verbenone, a constituent of rosemary oil, is metabolized by mammalian tissue to (-)-10-hydroxy-verbenone.
Narayanan (2003) examined the composition of two samples of rosemary oil of South Indian origin. As can be seen from the results presented in T-1, one was found to contain verbenone, while no detectable level was found in the other oil. Furthermore, it was found that the occurrence of verbenone had a perceivable effect on the sensory differentiation between the two oils.
Rosemary oils produced from plants collected from two divergent Italian hilly environments were analyzed by Angelini et al. (2003). The compositions of these two oils are presented in T-2. Trace amounts of (Z)-3-hexenol, cis-b-terpineol and trans-piperitol were also characterized in the rosemary oils.
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