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Article

Green Extraction of Carrageenans from Mastocarpus stellatus

1
CINBIO, EQ-2 Group, Facultade de Ciencias, Campus Ourense, Universidade de Vigo, As Lagoas, 32004 Ourense, Spain
2
Departamento de Ingeniería Química, Facultade de Ciencias, Campus Ourense, Universidade de Vigo, As Lagoas, 32004 Ourense, Spain
3
Departamento de Química Analítica, Facultade de Ciencias, Campus Ourense, Universidade de Vigo, As Lagoas, 32004 Ourense, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Antonello Santini
Polymers 2022, 14(3), 554; https://doi.org/10.3390/polym14030554
Received: 15 December 2021 / Revised: 31 December 2021 / Accepted: 26 January 2022 / Published: 29 January 2022
(This article belongs to the Special Issue Advanced Polymer Materials From Natural Resources)
The recovery of biopolymers from natural resources using eco-friendly extraction technologies that enhance their mechanical properties has gained attention in recent years. In this context, this work deals with the isolation of hybrid carrageenans from Mastocarpus stellatus red seaweed using subcritical water extraction operating in a wide range of thermal conditions (70–190 °C). The extracted biopolymers were analyzed by means of either Fourier-Transform infrared, nuclear magnetic resonance, rheological or cell viability assays. In parallel, the fundamental chemical composition of the seaweed used as raw material, as well as the main phytochemical properties of the soluble liquid extracts, were also studied. Results indicated that thermal extraction conditions significantly affected the rheological behavior of the recovered hybrid carrageenans. The hybrid carrageenan extraction yields varied, with results between 10.2 and 30.2% being the highest values obtained at hydrothermal treatment of 130 °C. A wide palette of viscous features was identified for recovered hybrid carrageenans, with the strongest rheology properties observed at the same temperature. It should be remarked that the maximum inhibitory effect was also obtained at 130 °C for both the ovarian carcinoma cell line (A2780) (65%, IC50: 0.31 mg/mL) and lung carcinoma cell line (A549) (59%, IC50: 0.41 mg/mL). View Full-Text
Keywords: subcritical water extraction; hot water extraction; carrageenan; antioxidant; mechanical properties; antitumoral subcritical water extraction; hot water extraction; carrageenan; antioxidant; mechanical properties; antitumoral
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MDPI and ACS Style

Flórez-Fernández, N.; Falqué, E.; Domínguez, H.; Torres, M.D. Green Extraction of Carrageenans from Mastocarpus stellatus. Polymers 2022, 14, 554. https://doi.org/10.3390/polym14030554

AMA Style

Flórez-Fernández N, Falqué E, Domínguez H, Torres MD. Green Extraction of Carrageenans from Mastocarpus stellatus. Polymers. 2022; 14(3):554. https://doi.org/10.3390/polym14030554

Chicago/Turabian Style

Flórez-Fernández, Noelia, Elena Falqué, Herminia Domínguez, and María Dolores Torres. 2022. "Green Extraction of Carrageenans from Mastocarpus stellatus" Polymers 14, no. 3: 554. https://doi.org/10.3390/polym14030554

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