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Physical Sciences and Mathematics Commons™
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Full-Text Articles in Physical Sciences and Mathematics
Easy, Bright, Fluorescence Demonstration Of Buffer Action, Mariana Dykstra, Yejin Chung, Mark Muyskens
Easy, Bright, Fluorescence Demonstration Of Buffer Action, Mariana Dykstra, Yejin Chung, Mark Muyskens
University Faculty Publications and Creative Works
We report an attractive update to the demonstration of acid–base buffer action that is appropriate for ease of use and getting attention in the classroom. The twist is based on new fluorophore information and the recent availability of UV flashlights serving as an ideal, portable excitation light source. The pH-dependent fluorescence comes from a choice among three natural sources, namely narra tree wood extract, kidneywood extract, and scopoletin, which is a purchasable coumarin, that all perform equally well. We provide practical details for performing the buffer demonstration at scales of 100 and 1000 mL and give background information for context.
Technology, Values, And Faith With Computer Scientist Derek Schuurman, Derek Schuurman
Technology, Values, And Faith With Computer Scientist Derek Schuurman, Derek Schuurman
University Faculty Publications and Creative Works
Dr. Schuurman is a fellow of the American Scientific Affiliation, part of the leadership team for the West Michigan ASA chapter, an associate fellow of the The Kirby Laing Centre for Public Theology in Cambridge, senior member of the IEEE, member of the ACM, CES, ACMS, a book review editor for Perspectives on Science and Christian Faith, a regular contributor to the Christian Scholars Review blog, and a regular columnist for Christian Courier.
Loren Haarsma - When Did Sin Begin?, Loren Haarsma
Loren Haarsma - When Did Sin Begin?, Loren Haarsma
University Faculty Publications and Creative Works
Patrick Hamilton speaks to Calvin University Professor, Loren Haarsma, about the origins of sin and various ways to make sense of the doctrine of original sin in light of evolutionary origins. Other topics of conversation include psychology, free will and the theology of Saint Augustine.