title: Effect of high-pressure treatment on the carotenoid composition and the radical scavenging activity of persimmon fruit purees.
abstract: The carotenoid composition of persimmon fruit purees of two cultivars, cvs. Rojo Brillante and Sharon, grown in Spain was determined by HPLC to assess the effects of high-pressure processing on some sensory (carotenoids), nutritional (provitamin A value), and health-related (radical-scavenging capacity) parameters. Total carotenoid content was higher in untreated Rojo Brillante puree (22. 11 microg g(-)(1)) than in untreated Sharon puree (15.22 microg g(-)(1)). Purees of both untreated cultivars showed similar carotenoid patterns after saponification with beta-cryptoxanthin, beta-carotene, and zeaxanthin as the main pigments. A high content of lycopene was quantified in Rojo Brillante (5.34 microg g(-)(1)), whereas only traces were detected in Sharon. The provitamin A value, reported as retinol equivalents (RE), was in untreated Rojo Brillante puree (77 RE/100 g) similar to that of Sharon (75 RE/100 g). Scavenging free radical capacity, measured as antiradical efficiency (AE), showed in untreated Rojo Brillante puree a value (12.14 x 10(-)(3)) 8.5 times higher than that in untreated Sharon (1. 42 x 10(-)(3)). Nonuniform behavior of high-pressure treatment was detected. Pressure treatments at 50 and 300 MPa/15 min/25 degrees C for Rojo Brillante and at 50 and 400 MPa/15 min/25 degrees C for Sharon increased the amount of extractable carotenoids (9-27%), which are related with the increase of vitamin A value (75-87 RE/100 g). No correlation with the increase of AE (from 1.42 x 10(-)(3) to 16.73 x 10(-)(3) and 19.58 x 10(-)(3)) after some pressure treatments (150 and 300 MPa/15 min/25 degrees C) was found.
authors.affiliation: Plant Foods Science and Technology Department, Instituto del Frío (CSIC), Ciudad Universitaria, Madrid, Spain.
authors.forename: B
authors.initials: B
authors.lastname: de Ancos
authors.forename: E
authors.initials: E
authors.lastname: Gonzalez
authors.forename: M P
authors.initials: MP
authors.lastname: Cano
mesh_terms: D002338:Carotenoids / Q000032:analysis*; D016166:Free Radical Scavengers / Q000494:pharmacology*; D005638:Fruit / Q000737:chemistry*; D011312:Pressure
chemical_list: D016166:Free Radical Scavengers; D002338:Carotenoids