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Direct linkYip, Cheng-Wai – Journal of Biological Education, 2007
Extracts of fruit peels contain antioxidants that protect the bacterium "Escherichia coli" against damage induced by ultraviolet light. Antioxidants neutralise free radicals, thus preventing oxidative damage to cells and deoxyribonucleic acid. A high survival rate of UV-exposed cells was observed when grapefruit or grape peel extract was…
Descriptors: Safety, Scientific Methodology, Biology, Statistical Analysis
Chin, Christine; Chia, Li-Gek – Journal of Biological Education, 2004
This study employed problem-based learning (PBL) for project work in a Year 9 biology class. The purpose of the study was to investigate (a) how self-generated problems and questions directed students in their learning, (b) how students reacted to this instructional approach, and (c) the problems that they encountered. Students formulated problems…
Descriptors: Foreign Countries, Video Technology, Problem Based Learning, Biology
