title: Α-Cyclodextrin encapsulation of supercritical CO₂ extracted oleoresins from different plant matrices: A stability study.
abstract: Here we describe the encapsulation in α-cyclodextrins (α-CDs) of wheat bran, pumpkin and tomato oleoresins, extracted by supercritical carbon dioxide, to obtain freeze-dried powders useful as ready-to-mix ingredients for novel functional food formulation. The stability of tocochromanols, carotenoids and fatty acids in the oleoresin/α-CD complexes, compared to the corresponding free oleoresins, was also monitored over time in different combinations of storage conditions. Regardless of light, storage at 25°C of free oleoresins determined a rapid decrease in carotenoids, tocochromanols and PUFAs. α-CD encapsulation improved the stability of most bioactive compounds. Storage at 4°C synergized with encapsulation in preventing degradation of bioactives. Unlike all other antioxidants, lycopene in tomato oleoresin/α-CD complex resulted to be more susceptible to oxidation than in free oleoresin, likely due to its selective sequestration from the interaction with other lipophilic molecules of the oleoresin.
authors.affiliation: Istituto di Scienze delle Produzioni Alimentari, Consiglio Nazionale delle Ricerche (CNR), Via Prov.le Lecce-Monteroni, 73100 Lecce, Italy.
authors.forename: Miriana
authors.initials: M
authors.lastname: Durante
authors.affiliation: Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Università del Salento, Via Prov.le Lecce-Monteroni, 73100 Lecce, Italy. Electronic address: marcello.lenucci@unisalento.it.
authors.forename: Marcello Salvatore
authors.initials: MS
authors.lastname: Lenucci
authors.affiliation: Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Università del Salento, Via Prov.le Lecce-Monteroni, 73100 Lecce, Italy.
authors.forename: Pier Paolo
authors.initials: PP
authors.lastname: Marrese
authors.affiliation: Istituto per i Processi Chimico-Fisici, Consiglio Nazionale delle Ricerche (CNR), via Orabona 4, 70126 Bari, Italy.
authors.forename: Vito
authors.initials: V
authors.lastname: Rizzi
authors.affiliation: Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Università del Salento, Via Prov.le Lecce-Monteroni, 73100 Lecce, Italy.
authors.forename: Monica
authors.initials: M
authors.lastname: De Caroli
authors.affiliation: Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Università del Salento, Via Prov.le Lecce-Monteroni, 73100 Lecce, Italy.
authors.forename: Gabriella
authors.initials: G
authors.lastname: Piro
authors.affiliation: Istituto per i Processi Chimico-Fisici, Consiglio Nazionale delle Ricerche (CNR), via Orabona 4, 70126 Bari, Italy.
authors.forename: Paola
authors.initials: P
authors.lastname: Fini
authors.affiliation: Istituto Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche (CNR), via Roma 64, 83100 Avellino, Italy.
authors.forename: Gian Luigi
authors.initials: GL
authors.lastname: Russo
authors.affiliation: Istituto di Scienze delle Produzioni Alimentari, Consiglio Nazionale delle Ricerche (CNR), Via Prov.le Lecce-Monteroni, 73100 Lecce, Italy.
authors.forename: Giovanni
authors.initials: G
authors.lastname: Mita
mesh_terms: D000975:Antioxidants; D002338:Carotenoids / Q000737:chemistry*; D005227:Fatty Acids / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D047391:alpha-Cyclodextrins / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D005227:Fatty Acids; D010936:Plant Extracts; D047391:alpha-Cyclodextrins; C018620:oleoresins; D002338:Carotenoids; C032613:alpha-cyclodextrin
keywords: Carotenoids; Cucurbita moschata (Duch.); Differential scanning calorimetry; Fatty acids; Fourier transform infrared spectroscopy – attenuated total reflectance; Solanum lycopersicum (L.); Supercritical fluid extraction; Tocochromanols; Triticum durum (Desf.)