title: Microencapsulation of lipophilic bioactive compounds using prebiotic carbohydrates: Effect of the degree of inulin polymerization.
abstract: This paper presents novel outcomes about the effect of degree of inulin polymerization (DP) on the technological properties of annatto seed oil powder obtained by freeze-drying. Inulins with two DP's were evaluated: GR-inulin (DP≥10) and HP-inulin (DP≥23). Micrographs obtained by confocal microscopy were analyzed to confirm the encapsulation of bioactive compounds using both inulins, especially the encapsulation of the natural fluorescent substance δ-tocotrienol. Microparticles formed with both inulins presented the same capacity for geranylgeraniol retention (77%). Glass transitions of microparticles formed with GR-inulin and HP-inulin succeeded at 144°C and 169°C, respectively. Regarding water adsorption isotherms, microparticles formed with HP-inulin and GR-inulin presented behaviors of Types II (sigmoidal) and III (non-sigmoidal), respectively. Reduction of water adsorption capacity in the matrix at high relative moistures (>70%) was presented when HP-inulin was used. At low relative moistures (<30%), the opposite behavior was observed.
authors: LASEFI/DEA/FEA (School of Food Engineering)/UNICAMP (University of Campinas), Rua Monteiro Lobato, 80, Campinas, SP, CEP: 13083-862, Brazil. Electronic address: engerickeven@gmail.com.
authors: Eric Keven
authors: EK
authors: Silva
authors: Federal University of Santa Maria, UFSM, Rua Ernesto Barros, 1345, Cachoeira do Sul, RS, 96506-322, Brazil.
authors: Giovani L
authors: GL
authors: Zabot
authors: LASEFI/DEA/FEA (School of Food Engineering)/UNICAMP (University of Campinas), Rua Monteiro Lobato, 80, Campinas, SP, CEP: 13083-862, Brazil.
authors: Matheus A
authors: MA
authors: Bargas
authors: LASEFI/DEA/FEA (School of Food Engineering)/UNICAMP (University of Campinas), Rua Monteiro Lobato, 80, Campinas, SP, CEP: 13083-862, Brazil.
authors: M Angela A
authors: MAA
authors: Meireles
mesh_terms: D002214:Capsules; D007444:Inulin / Q000737:chemistry*; D056692:Prebiotics
chemical_list: D002214:Capsules; D056692:Prebiotics; D007444:Inulin
keywords: Fructooligosaccharide; Functional carbohydrate; Glass transition temperature; Wall material; Water adsorption isotherms