抄録
A survey was conducted to find out how Japanese people prepare herbal oil at home. It was found that some people were preparing herbal oil by methods which are generally known to result in oxidation. These methods include using a transparent or wide-mouth bottle, using an oil volume of 3/4 or less of the bottle volume, leaving the bottle in the sun, an not removing the herb after a period of time. A further study needs to be made to find the influence on the oil flavor or oxidation of the method and/or place of preparation. It is also, necessary to identify why cloudiness and water droplets occur and how they influence the oxidation.
