“Changes in apoprotein and porphyrin fluorescence suggest two classes of bound porphyrins.”

“This turnover releases significant amounts of the iron-free portion of heme, porphyrin, which is subsequently degraded.”

“It should also be noted that the doming deformation in the NSD context does not involve the iron, but only the 24 atoms of the porphyrin ring.”

“Some of the finest cuprite specimens ever found have come from the oxidized zones of several of Arizona's porphyry copper and related deposits.”

“This is particularly well known to collectors familiar with porphyry copper deposits of Arizona, New Mexico, and Utah.”

“They also noted that much kaolin is in or near decomposed porphyry bodies that overlie the largest ore shoots in the Leadville Dolomite.”

“Other metabolic neuropathies include symptomatic thyroid disease, porphyria, and renal or hepatic failure.”

“She was a young woman with acute porphyria and severe peripheral neuropathy.”

“Bullous pemphigoid and pemphigus vulgaris also cause blistering skin lesions that appear in later adulthood, similar to porphyria cutanea tarda.”

“In China, at the close of the period, there were enormous eruptions of melaphyre, porphyrite and quartz-porphyry.”

“In the intersertal and porphyrite diabases, fresh or devitrified glassy base is not infrequent.”