The Chemical Nature of Oxidized Sulphur in Asphaltenes from X-Ray Absorption Spectroscopy
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Structural features and the reaction mechanism of cytochrome oxidase: iron and copper X-ray absorption fine structure.
X-ray edge absorption of copper and extended fine structure studies of both copper and iron centers have been made of cytochrome oxidase from beef heart, Paracoccus dentrificans, and HB-8 thermophilic bacteria (1-2.5 mM in heme). The desired redox state (fully oxidized, reduced CO, mixed valence formate and CO) in the x-ray beam was controlled by low temperature (-140 degrees C) and was continu...
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