Impact of incorporating olive leaves during the industrial extraction of cv. Arbequina oils on the physicochemical--sensory quality and health claim fulfillment
| Autor: | José Alberto Pereira, Nuno Rodrigues, António M. Peres, Ana C. A. Veloso, Ítala M. G. Marx, Susana Casal, Rebeca Cruz |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Biochemistry
Industrial and Manufacturing Engineering 03 medical and health sciences chemistry.chemical_compound 0404 agricultural biotechnology 0302 clinical medicine Peroxide value Cultivar Food science Olive leaves Pungency Science & Technology Chemistry Extraction (chemistry) Health claim Electronic tongue 04 agricultural and veterinary sciences General Chemistry Sweetness 040401 food science Phenolic compounds Tyrosol 030221 ophthalmology & optometry Hydroxytyrosol Composition (visual arts) Olive oil Food Science Biotechnology |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | The effect of olive leaves addition (1%, w/w, cvs. Arbequina or Santulhana), during the industrial extraction of Arbequina oils, on their physicochemical, color, phenolic profile, and sensory characteristics, was studied. Leaves incorporation reduced the primary oxidation (peroxide value by 33% and K232 by 17%) and increased the oxidative stability (19%), with the impact being more pronounced for Arbequina leaves. For these latter oils, leaves incorporation increased the total phenolic content (293±9 mg GAE/kg), which became richer in secoiridoid derivatives (143.7±3.0 mg/kg). Also, only Arbequina oils extracted with their own leaves supported the health claim regarding the protection of blood lipids against oxidative stress (hydroxytyrosol and tyrosol derivatives content greater than 5 mg per 20 g of olive oil). On the other hand, the incorporation of leaves from cvs. Arbequina and Santulhana during extraction enhanced the bitterness (5559%) and decreased the pungency (2533%). Santulhana leaves promoted an increase of the green-fruitiness (5.3±0.5), while Arbequina leaves enhanced the oils sweetness (7.0±0.4). Moreover, a potentiometric laboratory-made electronic tongue was applied, as a taste sensor device, being capable of successfully discriminating Arbequina oils extracted without or with addition of leaves, allowing the identification of (un)deliberated leaves incorporation during oils extraction. Lastly, it was found that the quality and composition of Arbequina oils industrially extracted were leaf cultivar dependent, with the low level of phenolics of control oils promoted by the incorporation of Arbequina leaves. The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support by national funds FCT/MCTES to CIMO (UIDB/00690/2020), CEB (UIDB/04469/2020) and REQUIMTE-LAQV (UIDB/50006/2020) units and to the Associate Laboratories for Green Chemistry-LAQV (UIDB/50006/2020) and SusTEC (LA/P/0007/2020), as well as to BioTecNorte operation (NORTE‐01‐0145‐FEDER‐000004) and to Project “GreenHealth—Digital strategies in biological assets to improve well-being and promote green health” (Norte-01–0145-FEDER-000042) funded by the European Regional Development Fund under the scope of Norte2020 ‐ Programa Operacional Regional do Norte. Ítala M.G. Marx acknowledges the Ph.D. grant (SFRH/BD/137283/2018) provided by FCT. Nuno Rodrigues thanks to National funding by FCT-Foundation for Science and Technology, P.I., through the institutional scientific employment program-contract. info:eu-repo/semantics/publishedVersion |
| Databáze: | OpenAIRE |
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