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Five selected compounds, geraniol, (R)‐(–)‐linalool, terpineol, γ‐terpinene and 1,8‐cineole, were tested for their influence on airborne microbes when vaporized with an air washer. Terpineol and 1,8‐cineole showed the highest antimicrobial activities. The average reduction of germ count was 68% and 64%, respectively. Although γ‐terpinene gave the lowest result among the compounds investigated, the average reduction of germ count was still 40%. When water without volatile compounds was sprayed, the colony forming units increased. These results show the positive effect of selected aroma compounds on the reduction of microbes in the room.
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Sato et al. (2007) studied this question.
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