Study on the effective deodorization of the odor in medical environment

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We investigated about deodorant effects of several familiar substances to some typical smells in the medical environment, through the following two experiments.First, we achieved a basic experiment about odor in order to constructing the methodology for physiological and psychological measurements, and we succeed to establishing the odor assessment system using by both the EEG and the semantic-differential technique, simultaneously. Using this system, we checked some physiological effects of several odor substances, such as the lavender oil, the scatol, and the iso-kisoic asid, and confirmed that the lavender oil had a little tendency of the sedative effect.Next, we achieved a further experiment about deodorant effects of several substances using by the ammonia. Ammonia causes one of the typical smells in medical environment. We had an experiment how the odor of ammonia is deodorized by some of familiar substances, such as coffee grounds, used tea leaves, peppermint oil, active carbon. Nine odorants were made, consist of ammonia, each of four familiar substances, and ammonia with each of four substances. The subjects were fourteen healthy women. They were given the seven odorants at random and evaluated their intensity, pleasantness-unpleasantness, and quality (Twenty-five rating scales used in semantic-differential (SD)).The results were as follows ; 1. The odor of ammonia with coffee grounds and the one with used tea leaves decreased most the intensity of subjective odor of ammonia. 2. The odor of ammonia with coffee grounds was slightly unpleasant, and the one with used tea leaves was neither pleasant nor unpleasant.These results suggested that the coffee grounds were most effective substance which deodorizes the odor of ammonia. And, the sensory qualities of the odor changed when the odor of ammonia deodorized.