Stintzing, Florian C Color, betalain pattern, and antioxidant properties of cactus pear (Opuntia spp.) clones. [electronic resource] - Journal of agricultural and food chemistry Jan 2005 - 442-51 p. digital Publication Type: Journal Article ISSN: 0021-8561 Standard No.: 10.1021/jf048751y doi Subjects--Topical Terms: Antioxidants--analysisAscorbic Acid--analysisBetalainsColorFruit--chemistryOpuntia--chemistryPhenols--analysisPigments, Biological--analysisQuaternary Ammonium Compounds--analysis