In this study fuji apples variation were measured during gradual decay, stored 5 weeks at 25℃. A aluminum and glass emission chamber were used for visual inspection throughout the experiment. The sampling was performed by using polyester aluminum bags and Tenax-TA tubes. In addition, GC/FID/O and TD-GC/MS were used for monitoring the compound of odor and its density variation during each storing period. By visual inspection, we found that the apples started decaying in 4th week and were rotten to core in 5th week. In contrast, individual odor analysis shows that the apples flavor reduced gradually and dramatically increased with the odor of old apples and apple cider in 3rd week, which was before visual identification of decay. This phenomenon was due to ongoing internal decay. ethyl 2-methylbutanoate, ethyl propanoate and 2-methylbutyl acetate were the major factor of this off-flavor in this period (3rd week). After visible observation of decay (4th week and 5th week), ethyl acetate, ethyl butanoate and hexyl ethanoate were emitted, which smells bitter or sour. Above 6 odors are closely related with apples decay, and measurement of smell or density of these odors could easily check the apples status. We expect measuring composition variation can be applied for food storage and management cause of not only internal change checking but also monitoring pre-decay phenomenon.

The characteristics of time changes in air temperature, DI (discomfort index) and WBGT (wet-bulb globe temperature) were investigated for inland city (daegu) and coastal city (pohang) of Gyeongbuk Province during the 2018 consecutive heat wave season. The time when the temperature dropped below 33℃ was around 19h in both regions. As such, the two regions were similar with respect to the time up to which the heatwave warning levels continued. However, the discomfort index (DI) was higher than 27 in Pohang. Most people feel unpleasant when an discomfort index of 27 or higher appears. The results indicated that Korea's night-time thermal environment during the summers is particularly poor in the southern coastal areas. WBGT began at 09:00 and lasted until 21:00, with a score of 31 or higher; this score, in principle, corresponded with the duration of outdoor activity in both regions. Therefore, it was found that outdoor work was at a level where all day long had to be stopped in both areas during the heat wave. Although time changes in temperature and WBGT were similar in both regions, Discomfort Index (DI) differed significantly. The difference refers to the fact that Pohang is strongly affected by the high heat capacity effect and the supply of water vapor from the sea.