Chem. Senses 25: 77-84,
2000
© Oxford University Press 2000
Odor Distinctiveness between Enantiomers of Linalool: Difference in Perception and Responses Elicited by Sensory Test and Forehead Surface Potential Wave Measurement
Department of Health Science, Hiroshima Prefectural Women’s University, Hiroshima 734-8558 1 Suzugamine Women’s College, Hiroshima 733-0842 2 Institute of Pharmaceutical Sciences, Hiroshima University School of Medicine, Hiroshima 734-8551, Japan
Correspondence to be sent to: Prof. Yoshiaki Sugawara, Department of Health Science, Hiroshima Prefectural Women’s University, 1-1-71 Ujina-higashi, Minami-ku, Hiroshima 734-8558, Japan. e-mail: sugawara{at}hirojo-u.ac.jp
The effects on humans of inhalation of optically active linalools were examined in terms of sensory tests and portable forehead surface electroencephalographic (IBVA-EEG) measurements in order to assess their odor distinctiveness by chiral isomers. (R)-(–)-Linalools with specific rotation of [
]D = –15.1° were isolated by repeated flash column chromatography from lavender oil, while (S)-(+)-linalools with []D = +17.4° and (RS)-(±)-linalools with []D = 0° and content of (R)-form 50.9% and (S)-form 49.1% were obtained from coriander oil and commercial linalool, respectively, by using the same method. With the use of an inhalator, each was administered to subjects both before and after 10 min of work. It was found that administration after work evoked different subjective impressions when compared with that before work depending on the configuration of the isomers and the type of work employed. For instance, inhalation of (R)-(–)-linalool after hearing environmental sounds not only produced a much more favorable impression in the sensory test but was also accompanied by a greater decrease in beta waves after work in comparison with that before work. This is in contrast to the case of mental work, which resulted in a tendency for agitation accompanied by an increase in beta waves. These findings led us to conclude that enantiomeric stereospecificity of linalool evoked different odor perception and responses not only with chiral dependence but also with task dependence. In addition, in comparing these sensory profiling features and IBVA-EEG tendencies between hearing environmental sound and mental work, a tendency was observed for (R)-(–)-linalool to coincide with (RS)-(±)-linalool but not with (S)-(+)-linalool.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  E. Lewinsohn, F. Schalechet, J. Wilkinson, K. Matsui, Y. Tadmor, K.-H. Nam, O. Amar, E. Lastochkin, O. Larkov, U. Ravid, et al. Enhanced Levels of the Aroma and Flavor Compound S-Linalool by Metabolic Engineering of the Terpenoid Pathway in Tomato Fruits Plant Physiology, November 1, 2001; 127(3): 1256 - 1265. [Abstract] [Full Text] [PDF]
|
|