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Observation of Microorganisms in Milk after the Expiration Date Using Dry Rehydratable Film
Youngshin Kim, Soo-Min Lim, Il-Sun Lee
The American Biology Teacher, Vol. 75 No. 5, May 2013; (pp. 345-348) DOI: 10.1525/abt.2013.75.5.9
YOUNGSHIN KIM is Associate Professor in the Division of Science Education at Kyungpook National University, Daegu, 702-701, Korea; e-mail: kys5912@knu.ac.kr.
  • For correspondence: kys5912@knu.ac.kr
SOO-MIN LIM is a doctoral candidate in Science Education at Kyungpook National University, Daegu, 702-701, Korea; e-mail: bbolsar@naver.com.
  • For correspondence: bbolsar@naver.com
IL-SUN LEE is Science Teacher and Part-time Lecturer of Biology Education at Korea National University of Education, Cheongwon, 363-791, Republic of Korea; e-mail: ilsunbrain@gmail.com.
  • For correspondence: ilsunbrain@gmail.com
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Abstract

Cultivation of microorganisms such as fungi and bacteria is often not included in scientific inquiries conducted in school because of the difficulty of manufacturing a suitable medium. A method using dry rehydratable film to reduce the need to manufacture a suitable medium and shorten incubation time was developed as an efficient microbial testing method. Using this method, students can easily perform experiments on microorganisms in schools where time and space are limited. For example, we carried out an inquiry on the possibility of drinking refrigerated milk that is already past its expiration date. Through this activity, we could raise issues related to the current shelf-life labeling system implemented in Korea. In addition, the method can measure microorganisms in several ways through air, direct contact, and indirect contact, making the procedure easier to use in scientific activities at school.

  • Dry rehydratable film media
  • microorganism
  • colony
  • science fair projects
  • © 2013 by National Association of Biology Teachers. All rights reserved. Request permission to photocopy or reproduce article content at the University of California Press’s Rights and Permissions Web site at http://www.ucpressjournals.com/reprintinfo.asp.
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Vol. 75 No. 5, May 2013

The American Biology Teacher: 75 (5)
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Observation of Microorganisms in Milk after the Expiration Date Using Dry Rehydratable Film
Youngshin Kim, Soo-Min Lim, Il-Sun Lee
The American Biology Teacher, Vol. 75 No. 5, May 2013; (pp. 345-348) DOI: 10.1525/abt.2013.75.5.9
YOUNGSHIN KIM is Associate Professor in the Division of Science Education at Kyungpook National University, Daegu, 702-701, Korea; e-mail: kys5912@knu.ac.kr.
  • For correspondence: kys5912@knu.ac.kr
SOO-MIN LIM is a doctoral candidate in Science Education at Kyungpook National University, Daegu, 702-701, Korea; e-mail: bbolsar@naver.com.
  • For correspondence: bbolsar@naver.com
IL-SUN LEE is Science Teacher and Part-time Lecturer of Biology Education at Korea National University of Education, Cheongwon, 363-791, Republic of Korea; e-mail: ilsunbrain@gmail.com.
  • For correspondence: ilsunbrain@gmail.com

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Observation of Microorganisms in Milk after the Expiration Date Using Dry Rehydratable Film
Youngshin Kim, Soo-Min Lim, Il-Sun Lee
The American Biology Teacher, Vol. 75 No. 5, May 2013; (pp. 345-348) DOI: 10.1525/abt.2013.75.5.9
YOUNGSHIN KIM is Associate Professor in the Division of Science Education at Kyungpook National University, Daegu, 702-701, Korea; e-mail: kys5912@knu.ac.kr.
  • For correspondence: kys5912@knu.ac.kr
SOO-MIN LIM is a doctoral candidate in Science Education at Kyungpook National University, Daegu, 702-701, Korea; e-mail: bbolsar@naver.com.
  • For correspondence: bbolsar@naver.com
IL-SUN LEE is Science Teacher and Part-time Lecturer of Biology Education at Korea National University of Education, Cheongwon, 363-791, Republic of Korea; e-mail: ilsunbrain@gmail.com.
  • For correspondence: ilsunbrain@gmail.com
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  • Top
  • Article
    • Abstract
    • Microbiology Knowledge for This Activity
    • Dry Rehydratable Film
    • Activity: Measuring the Amount of Microorganisms in Milk
    • Tips for Student-Driven Activities
    • Process
    • Results
    • Conclusion & Application
    • Pedagogical Implications
    • Acknowledgments
    • References
  • Figures & Data
  • Info & Metrics
  • PDF

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