본 연구는 초미세분쇄기술을 이용하여 옥수수전분의 입자구조파괴가 이루어졌을 때 분자구조적, 물리적 변화가 어떻게 이루어지는지를 구명하고자 하였다. 초미세 분쇄처리 후 옥수수전분의 평균직경은 약 50% 감소가 이루어졌으며 비표면적은 567% 증가하였다. 초미세분쇄처리 전·후의 옥수수전분에 대한 분자량분포를 GPC로 측정한 결과 분쇄 후 저분자량의 Peak II의 면적이 21.0%에서 86.5%로 상승하였다. 손상전분 함량은 각각 9.63%와 83.57%로 초미세분쇄처리에 의하여 크게 증가하였다. 옥수수전분의 경우는 겔(gel)을 형성하였으나 초미세분쇄처리 후에는 전분의 분쇄과정에서 전분입자파괴와 아울러 옥수수전분의 분자량이 저분자화 되면서 겔 형성능력이 크게 저하되었다.

In this study, sixth grade school children in the Guri area were surveyed via questionnaire regarding their sociodemographìc characteristics, snacking pattems, and intakes of different food groups and sugared snacks. Students with employed mothers had more frequent snacking events and were more dependent on store-purchased snacks compared to those having an unemployed mother. A high consumption of snack sugar was associated with a higher dietary diversity score. There was a positive relationship between snack sugar intake and the intakes of meat and dairy products and foods in the oil and nut group, respectively. A high snack sugar intake had a negative effect on fruit intake. Specific nutrient intake data will be required before conclusions can be made on whether nutrient imbalances are a concern in elementary school children having sweet snacks. Yet, the current data indicate that an increased snack sugar intake can decrease fruit intake, which could result in certain nutrient deficits. Specific dietary guidance may be necessary to address the snacking habits of elementary school children.

This study was performed to describe the perceptions of the family mealtime environment in preadolescents， and to determine the frequency of family meals and whether the mealtime environment is associated with nutrient intake. Surveys and 24-hour dietary recalls were completed by 197 children, ages 11 to 12, in elementary schools in the Incheon area. We assessed family meal frequency and the perceptions of the family meal environment with respect to priority, atmosphere, and family mealtime structure. The subject response frequencies and correlations among perceptions of the family mealtime environment, as well as the frequency of family meals and nutrient intake, were analyzed. Having a greater priority for family meals was associated with an increased frequency of family mealtimes. An enjoyable family meal environment was positively correlated with increases in nutrient intake. From the results of this study, we suggest consideration be placed on opportunities to design nutrition promotion strategies that target families and their children, with respect to promoting family mealtimes and overcoming the barriers to having family meals.