우식유발식품에 의한 인공타액내 pH 변화와 당 분해 효소 활성에 관한 연구
A Study on Artificiality Salivary pH and Sugar Fermentation Test of Caries Potentiality Foods
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참고문헌
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초록
청소년을 대상으로 간식섭취실태를 조사하고, 간식품의총당도, 간식품의 pH, S. mutans의 산생성능과 당분해효소활성도를 측정하여, 치아우식유발지수가 낮은 간식품을 선택할 수 있도록 표준화된 치아우식유발지수를 개발하는 데필요한 기초자료를 제시하고자 본 연구를 실시하였으며 다음과 같은 결론을 얻었다. 1. 간식품 28종류의(고체군 21가지, 액체군 7가지) 당도를 측정한 결과 오레오가 43.5로 가장 높았고, 스윙칩과 마이쮸가 39.3, 땅콩카라멜 38.8, 츄파춥스 37.2, 소보루빵33.9 순이었으며, 포카리스웨트와 녹차가 0으로 가장 낮았다. 설탕이 많이 함유된 음식에서 총당도의 값이 높아지는것을 볼 수 있었다. 2. S. mutans의 산생성능에 의한 pH 평균값은 pH 5.33이였으며, 실험군의 S. mutans 산생성능에 의한 평균 pH변화는 10분 배양 후 pH 5.27, 30분 후 pH 5.21, 1시간 후 pH 5.15, 24시간 배양 후에는 pH 4.80으로 S. mutans의 당분해효소활성에 의한 산생성도 증가로 대조군보다 pH값이 낮아지는 것을 볼 수 있었다. 3. S. mutans의 당분해효소활성도를 비색법으로 관찰한결과 glucose의 활성도는 78.58%, sucrose의 활성도는 75%,galactose의 활성도는 71.42%로 대부분의 시료에서 Positive 인 orange & yellow color로 나타났다.
Abstract
This study was designed to provide basic data for developing a standardized caries potentiality index to help to choose snack foods with a low score on the index by investigating adolescents' snack intakes and measuring them in total saccharinity, pH, and acidogenic potential and glucosidase activity of Streptococcus mutans (S. mutans). Total 28 snack foods were selected and measured for total saccharinity (Pocket refractometer PAL-1, ATAGO) and pH with a pH meter (Mentor, Seoul, Korea). Artificial saliva was added to each sample. The experiment group was administered with S. mutans (ATCC 3692), cultured in a constant temperature incubator at 37oC, and measured for pH changes over five times including after 10 minutes, 30 minutes, 1 hour, and 24 hours. Each sample of 0.3 ml was added to tubes containing sucrose, galactose, or glucose to measure the glucosidase activity of S. mutans. They were then observed for glucosidase activity with colorimetry after 24 hours of culture in a constant temperature incubator at 37oC. The mean pH by the acidogenic potential of S. mutans was pH 5.33. The experiment group dropped in pH more than the control group due to the increasing acidogenic potential of S. mutans by glucosidase activity, recording pH 5.27 after 10 minutes, pH 5.21 after 30 minutes, pH 5.15 after 1 hour, and pH 4.80 after 24 hours. The observation results of glucosidase activity of S. mutans with colorimetry show that most of the samples were positive in orange and yellow with glucose, sucrose, and glactose recording activity of 78.58%, 75%, and 71.42%, respectively.
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