TY - JOUR
T1 - Application of an eco-friendly sodium acetate/urea deep eutectic solvent in the valorization of melon by-products
AU - Rico, Xiana
AU - Nuutinen, Emmi Maria
AU - Gullón, Beatriz
AU - Pihlajaniemi, Ville
AU - Yáñez, Remedios
N1 - Funding Information:
The authors acknowledge the financial support received from the Spanish “Ministry of Economy and Competitiveness” (Project “Modified aqueous media for wood biorefineries”, reference CTQ2017- 82962-R) and from “Xunta de Galicia” (GRC ED431C 2018/47, Centro Singular de Investigación Biomédica “CINBIO” and Project ED431 F 2020/03). These projects are partially funded by the FEDER Program of the European Union (“Unha maneira de facer Europa”). Dr. Beatriz Gullón would like to express her gratitude to the Spanish Ministry of Economy and Competitiveness for her postdoctoral grant (Reference RYC2018-026177-I). Xiana Rico is thankful for her predoctoral grant (reference ED481A-2018/300) with financial support from the “Xunta de Galicia”, as well as for the invitation for a research visit at VTT Technical Research Centre of Finland Ltd in the research area Biomass Processing and Products, financed by the same grant. The authors would like to thank the Centro de Apoio Científico-Tecnolóxico á Investigación (C.A.C.T.I.) for performing the nitrogen and metals determination, and the FTIR assay.
Funding Information:
The authors acknowledge the financial support received from the Spanish “Ministry of Economy and Competitiveness” (Project “Modified aqueous media for wood biorefineries”, reference CTQ2017- 82962-R) and from “Xunta de Galicia” (GRC ED431C 2018/47, Centro Singular de Investigación Biomédica “CINBIO” and Project ED431 F 2020/03). These projects are partially funded by the FEDER Program of the European Union (“Unha maneira de facer Europa”). Dr. Beatriz Gullón would like to express her gratitude to the Spanish Ministry of Economy and Competitiveness for her postdoctoral grant (Reference RYC2018-026177-I). Xiana Rico is thankful for her predoctoral grant (reference ED481A-2018/300) with financial support from the “Xunta de Galicia”, as well as for the invitation for a research visit at VTT Technical Research Centre of Finland Ltd in the research area Biomass Processing and Products, financed by the same grant. The authors would like to thank the Centro de Apoio Científico-Tecnolóxico á Investigación (C.A.C.T.I.) for performing the nitrogen and metals determination, and the FTIR assay.
Publisher Copyright:
© 2021
PY - 2021/11
Y1 - 2021/11
N2 - An eco-friendly sodium acetate/urea (NaOAc:urea:water) deep eutectic solvent (DES) was evaluated for the extraction of bioactive compounds from melon peels. Melon peels were first extracted with water to separate the water-insoluble solids (WIS) from free sugars, and the WIS were subsequently extracted with the DES. The extracts were analyzed for oligosaccharides and protein as well as total phenolic content and antioxidant activities. The influence of extraction parameters (time, temperature, DES molar ratio, water content and solid consistency) on the composition of the extracts was evaluated. At the selected conditions (NaOAc:urea:water with molar ratio 1:3:1.6 (10% (w/w) water), with a consistency of 2% (w/w), at 90 °C for 10 min), the total oligosaccharide yield was 8.84 g oligosaccharides/100 g WIS, of which 90% were oligogalacturonides, and the total phenolic content and protein content were 4.35 mg GAE/g WIS and 2.87 g/100 g WIS, respectively. Pectin enriched in branched rhamnose units with a low degree of methyl esterification was recovered by precipitation, with a yield of 7.95 g/100 g WIS and a galacturonic acid content of 49.44%.
AB - An eco-friendly sodium acetate/urea (NaOAc:urea:water) deep eutectic solvent (DES) was evaluated for the extraction of bioactive compounds from melon peels. Melon peels were first extracted with water to separate the water-insoluble solids (WIS) from free sugars, and the WIS were subsequently extracted with the DES. The extracts were analyzed for oligosaccharides and protein as well as total phenolic content and antioxidant activities. The influence of extraction parameters (time, temperature, DES molar ratio, water content and solid consistency) on the composition of the extracts was evaluated. At the selected conditions (NaOAc:urea:water with molar ratio 1:3:1.6 (10% (w/w) water), with a consistency of 2% (w/w), at 90 °C for 10 min), the total oligosaccharide yield was 8.84 g oligosaccharides/100 g WIS, of which 90% were oligogalacturonides, and the total phenolic content and protein content were 4.35 mg GAE/g WIS and 2.87 g/100 g WIS, respectively. Pectin enriched in branched rhamnose units with a low degree of methyl esterification was recovered by precipitation, with a yield of 7.95 g/100 g WIS and a galacturonic acid content of 49.44%.
KW - Antioxidants
KW - Bioactive molecules
KW - Deep eutectic solvents
KW - Oligogalacturonides
KW - Phenolic compounds
KW - Protein
UR - http://www.scopus.com/inward/record.url?scp=85118322375&partnerID=8YFLogxK
U2 - 10.1016/j.fbp.2021.10.006
DO - 10.1016/j.fbp.2021.10.006
M3 - Article
AN - SCOPUS:85118322375
SN - 0960-3085
VL - 130
SP - 216
EP - 228
JO - Food and Bioproducts Processing
JF - Food and Bioproducts Processing
ER -