April 27, 2012
A delighted murmur – a hybrid of “Wow!” and “Whoa!” -- arises as an ultraviolet light illuminates the invisible traces of chemicals on a chromatography paper, and Dave Stevenson knows he’s done his job at Family Science Night at Emerson School on Madison’s east side. Stevenson, a microbiologist at the federal Dairy Forage Research Center on the University of Wisconsin–Madison campus, gives an outline of chromatography for 22 students in first through fifth grades.