title: An inexpensive device for recording difference absorption spectra at low temperature (-196 degrees).
mesh_terms: D000042:Absorption; D000818:Animals; D001798:Blood Proteins / Q000032:analysis; D003080:Cold Temperature; D003580:Cytochromes / Q000032:analysis; D006736:Horses; D009206:Myocardium / Q000032:analysis; D012440:Saccharomyces / Q000032:analysis; D013053:Spectrophotometry / Q000295:instrumentation*
chemical_list: D001798:Blood Proteins; D003580:Cytochromes