We detected from the odor of living environment a large number of the odor substances using the olfactory GC-MS in the past study. However, it is not revealed what kind of substances contributes to actual odor. Therefore, in this study, we tried to clarify the similarity quantitatively to compare the odor type between the 21 kinds gasses of the single substance and the 3 kinds of the samples which we gathered from the living environment. When we compared the kind of odor by the SD method, sample A and sample B had high evaluation score such as “dusty (opposite word : clear)” “unpleasantness (opposite word : pleasantness)” and resembled octanoic acid and nonanoic acid, sample C had high evaluation score “sharp (opposite word : ambiguous)” and resembled stearic acid and phenylacetic acid. We calculated Pattern Similarity Value and the coefficient of correlation of the single odor substance and three samples by the mean of the score of SD method. They ranged from 0.946 to 0.999 and were very similar in any combination. The highest similarities among the samples were octanoic acid, nonanoic acid, undecanoic acid and phenylacetic acid.
In this study, we trained a pair of two sniffer mice for two urine samples, which would differmore stably than exhaled breath samples and can be collected non-invasively from patients or healthy volunteers. In the Y-maze test, sniffer mice were trained using human urine samples from 3 lung cancer patients or 3 healthy persons until the correct answer rate was 80% or higher. We investigated whether trained sniffer mice could distinguish lung cancer patients not used for training. As a result, lung cancer patient (1 person) and healthy subject (1 person) were identified with a correct answer rate of 80% or more. This result supports the presence of urinary volatile markers in human lung cancer.
In this study, the effects of individual differences on olfactory identification ability and aging on the recall of autobiographical memories by odor stimulation were investigated. In the experiment, young and older adults were divided into two groups based on an olfactory identification ability test classifying participants as having high and low in olfactory identification ability. They were asked to recall autobiographical memories by olfactory stimulation and rate the vividness of the memories. The results showed that the group with high olfactory identification ability had more vivid memories than the group with low olfactory identification ability in the younger age group. However, no difference was observed in the older age group.
Aroma characteristics of 3 tea cultivars ‘Yabukita’, ‘Sayamakaori’, ‘Koshun’ of “Kaori Ryokucha”, which has floral notes naturally generated, were evaluated by the aroma analysis and the questionnaire survey. The content of jasmine lactone of ‘Sayamakaori’ and ‘Koshun’ were significantly higher than that of ‘Yabukita’. The intensities of sensory perception of floral aroma and sweet note for ‘Sayamakaori’ and ‘Koshun’ were significantly higher than that of ‘Yabukita’. The preference for ‘Koshun’ was significantly higher than that of ‘Yabukita’.