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Helen Murray Free

Born: 1923

Indicator for detecting glucose—Her work in diagnostic chemistry led to the development of many tests used in urine testing, including CLINISTIX®, introduced in 1956. Early on at Miles Laboratories, she devised tests to detect glucose, ketone, and bilirubin in urine. The procedures she and her husband, Alfred Free, developed are still used. Today, Helen Free is a high-profile promoter of science education, involved in chemistry awareness programs around the world. (2000)

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Alfred FreeThe National Inventors Hall of FameRobert Gallo

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