title: Effect of wall material on the antioxidant activity and physicochemical properties of Rubus fruticosus juice microcapsules.
abstract: Blackberry (Rubus fruticosus) juice possesses compounds with antioxidant activity, which can be protected by different biopolymers used in the microencapsulation. Therefore, the effects of cell wall material including maltodextrin (MD), Arabic gum (GA) and whey protein concentrate (WPC) were evaluated on the physicochemical and antioxidant properties of encapsulated blackberries using a spray-drying technique. Anthocyanin concentration, polymeric colour, total polyphenols, radical scavenging activity of the 1,1-diphenyl-2-picrilhydrazil radical, reducing power and the stability at different storage conditions were evaluated. GA and MD conferred a similar protection to the antioxidant compounds when the microcapsules were stored at low water activities (aw < 0.515) in contrast to at a high moisture content (aw > 0.902), whereas WPC presented a high protection. Therefore, the selection of the best wall material for blackberry juice encapsulation depends of the conditions of storage of the powder.
authors.affiliation: Instituto de Ciencias Básicas, Universidad Veracruzana , Dr. Luis Castelazo s/n, Col. Industrial Animas, Xalapa Ver. , México and.
authors.forename: Dafne I
authors.initials: DI
authors.lastname: Díaz
authors.forename: Cesar I
authors.initials: CI
authors.lastname: Beristain
authors.forename: Ebner
authors.initials: E
authors.lastname: Azuara
authors.forename: Guadalupe
authors.initials: G
authors.lastname: Luna
authors.forename: Maribel
authors.initials: M
authors.lastname: Jimenez
mesh_terms: D000872:Anthocyanins / Q000008:administration & dosage* / Q000737:chemistry / Q000494:pharmacology; D000975:Antioxidants / Q000008:administration & dosage* / Q000737:chemistry / Q000494:pharmacology; D001628:Beverages / Q000032:analysis; D002214:Capsules / Q000737:chemistry; D003890:Desiccation; D004339:Drug Compounding; D004355:Drug Stability; D004356:Drug Storage; D006170:Gum Arabic / Q000737:chemistry*; D010084:Oxidation-Reduction / Q000187:drug effects; D011134:Polysaccharides / Q000737:chemistry*; D065856:Rubus / Q000737:chemistry
chemical_list: D000872:Anthocyanins; D000975:Antioxidants; D002214:Capsules; D011134:Polysaccharides; C008315:maltodextrin; D006170:Gum Arabic
keywords: Antioxidants; blackberry; microencapsulation; spray drying; stability; wall material