How does a forensic scientist determine cases of forgery or arson? How do scientists know which pigments are shared by plants? How are proteins or DNA isolated? The answer to all of these questions is "chromatography," an analytic technique for separating compounds based on their movements. Confused? Viewers won't be after watching this entry in the 10-volume Science Lab Investigations! series that provides an excellent introduction to a common procedure using step-by-step instructions, simple explanations with examples, and repetition, as well as frequent "think it through" breaks to encourage critical thinking. In addition to learning about practical applications in forensics and science, students in the classroom lab segment (which emphasizes safety and points out common pitfalls) engage in a controlled chromatography experiment to determine if two samples are identical. Other titles in the series include: DNA Transformation, Properties of Gases, Spectrophotometry, Titration and Water Analysis. Highly recommended. Aud: J, H, C, P. (E. Gieschen)
Chromatography
(2002) 23 min. $39.95 (teacher's guide included). Schlessinger Media (dist. by Library Video Company). PPR. Color cover. Closed captioned. ISBN: 1-57225-483-1. Volume 18, Issue 1
Chromatography
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