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단백질 가수분해 효소 및 이황화 결합 환원제 처리가 쌀의 이화학적 성질과 호화 특성에 미치는 영향
김성란(Sung Ran Kim),안승요(Seung Yo Ahn) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.6
Effect of the modification of rice protein by protease and 2-mercaptoethanol on physicochemical and gelatinization properties was investigated for the three cultivars of rice. Total amylose contents of Chucheongbyeo(japonica type), Chosengtongilbyeo(tongil type, indica x japonica) and IR 36 (indica type) were in the range of 20∼25%. Total amylose and insoluble amylose content of IR 36 were higher than the others. The differential scanning calorimetric and X-ray diffraction results revealed higher relative crystallinity of IR 36 than the others. Water uptake was increased and amylographic viscosity was significantly decreased by 2-mercaptoethanol treatment. Amylographic viscosity was significantly decreased and hot water-soluble carbohydrate content was increased by protease treatment. The proportions of high molecular weight of soluble carbohydrate fractionated by gel filtration chromatography were increased by protease treatment. These effects were most significant in IR 36. This results suggested that starch gelatinization be accelerated by alteration of the protein with protease and reducing agent.
단백질 가수분해 효소 및 이황화 결합 환원제 처리가 밥의 텍스쳐에 미치는 영향
김성란(Sung Ran Kim),안승요(Seung Yo Ahn) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.6
Effect of protease and 2-mercaptoethanol treatment on the texture of cooked rice was investigated. Hardness, chewiness and gumminess of cooked rice were decreased by reducing the disulfide bonds of protein using 2-mercaptoethanol. Protease-treated rice grains, when cooked, showed more favorable results in stickiness measured by Instron, hardness measured by rheometer and sensory acceptability of cooked rice. Water content and volume expansion of cooked rice were increased by protease or 2-mercaptoethanol treatment. This results suggested that the textural characteristics of cooked rice may be influenced by surrounding or closely associated protein.
경남지역 일부 인문계 및 전문계 고등학교 남학생들의 식습관, 영양지식 및 건강관련행동에 관한 비교 연구
김성란(Seung-Ran Kim),김성희(Sung-Hee Kim) 동아시아식생활학회 2015 동아시아식생활학회지 Vol.25 No.3
This study aimed to compare the dietary habits, nutritional knowledge, and health-related behaviors of students by high school type using questionnaires. The subjects were 586 male students (academic high school students (AS); 294, specialized high school students (SS); 292) in Jinju, Gyeongnam. The frequencies of eating breakfast and snacks were higher in AS than in SS (p<0.05), whereas the frequency of drinking was higher in SS than in AS (p<0.05). The main reason for skipping breakfast was ‘poor appetite’ in AS (45.2%) and ‘lack of time’ in SS (56.5%) (p<0.05). Favorite snacks included ‘pizza, hamburger’ (33.0%) and ‘bread, noddle, ramyun’ (31.0%) in AS as well as ‘pizza, hamburger’ (32.5%) and ‘fruit, fruit juice’ (26.0%) in SS. A mean of 56.2% of students ate an unbalanced diet, and the main reason was ‘untasty’ (47.2%). The frequency of eating out was higher in SS than in AS (p<0.05), and the main menu while eating out was ‘Korean food’ in AS (96.3%) and SS (90.3%). The frequency of ‘meat, fish, egg, beans’ was higher in AS than in SS (p<0.05). On the other hand, the frequencies of ‘fruit, fruit juices’ (p<0.05), ‘milk, milk products’ (p<0.01), ‘seaweeds’ (p<0.05), ‘instant foods’ (p<0.001) and ‘soda and ion drinks’ (p<0.001) were higher in SS than in AS. The mean rates of drinking and smoking in students were 84% and 29.5%, respectively. The main reason for drinking and smoking was ‘to relieve stress’ in AS (38.0%) and SS (30.9%) (p< 0.001). In general, the nutritional knowledge level of SS was higher than that of AS. In conclusion, there were significant differences in the frequencies of eating breakfast, food intake, drinking and reasons for eating snacks, unbalanced diet, drinking and smoking between AS and SS. Therefore, its necessary to provide proper nutritional education for students according to high school type.