Photochemistry and Photobiology · 1970 · 16 citations · 2 references
Natural SciencesBiochemistryChemistryLyophilizationPhotochemistryPh DependencePhotodegradation Studies
Abstract— U.V. irradiation of trans ‐urocanic acid frozen in an ice matrix results in trans, trans, trans ‐2,4‐di‐imidazolyl‐1,3‐cyclobutanedicarboxylic acid from pH 8.0 solutions; or cis, trans, cis ‐3, 4‐di‐imidazolyl‐1, 2‐cyclobutanedicarboxylic acid from pH 5.9 solutions.
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