UV/Vis spectroscopy can detect intrinsic chromophores in proteins, RNA, and DNA. It is also used in colourimetric assays to observe reaction partners that exhibit measurable colour changes due to ...

In July 1941, Arnold Beckman, founder of his eponymous company, introduced his DU UV-vis spectrophotometer. It was the production version of the Model D prototype that he and Howard Cary had first ...