title: Effect of orange juice's processing on the color, particle size, and bioaccessibility of carotenoids.
abstract: This study was aimed at assessing the differences between industrially processed and hand-squeezed orange juices (OJs) in relation to their color, particle size, carotenoid content, and carotenoid bioaccessibility. Specifically, industrial samples of fresh squeezed OJs after the finishing steps (FISO) and the same OJs after pasteurization (PISO), as well as hand-squeezed OJs (HSO) were studied. The results showed that the HSO and PISO were different (p < 0.05) in terms of color (darker and more reddish vs brighter, more yellowish and colorful), particle size (volume and surface area mean diameter), and total carotenoid content (29 ± 5 and 22 ± 3 mg/L, respectively). On the other hand, the industrial extraction of OJs reduced the particle size distribution, and accordingly, the relative bioaccessibility of bioactive carotenoids increased (p < 0.01). Independently of the type of OJ, the bioaccessibility of carotenoids in decreasing order was the following: α-carotene > β-cryptoxanthin > β-carotene > zeaxanthin > lutein.
authors.affiliation: Food Colour & Quality Laboratory, Department of Nutrition & Food Science, Universidad de Sevilla, Facultad de Farmacia, 41012 Sevilla, Spain.
authors.forename: Carla M
authors.initials: CM
authors.lastname: Stinco
authors.forename: Rocío
authors.initials: R
authors.lastname: Fernández-Vázquez
authors.forename: Ma L
authors.initials: ML
authors.lastname: Escudero-Gilete
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Heredia
authors.forename: Antonio J
authors.initials: AJ
authors.lastname: Meléndez-Martínez
authors.forename: Isabel M
authors.initials: IM
authors.lastname: Vicario
mesh_terms: D001628:Beverages / Q000032:analysis*; D001682:Biological Availability; D002338:Carotenoids / Q000032:analysis / Q000493:pharmacokinetics*; D032084:Citrus sinensis; D003116:Color; D005511:Food Handling / Q000379:methods*; D005638:Fruit / Q000737:chemistry*; D010316:Particle Size; D061352:Pasteurization
chemical_list: D002338:Carotenoids