2026-04-22T14:42:38Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/60272021-11-02T12:01:51Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245
Repositorio Institucional de la Universidad de Burgos
author
Trigueros Andrés, Ester
author
Sanz Díez, Mª Teresa
author
Alonso Riaño, Patricia
author
Beltrán Calvo, Sagrario
author
Ramos Rodríguez, Cipriano
author
Melgosa Gómez, Rodrigo
2021-10-15T10:27:19Z
2021-10-15T10:27:19Z
2021
0921-8971
http://hdl.handle.net/10259/6027
10.1007/s10811-020-02349-0
1573-5176
In this work valorization of the underexploited industrial solid residue generated after agar extraction from Gelidium sesquipedale
was studied by using subcritical water in a semicontinuous fix-bed reactor. First, a complete characterization of this by-product
was carried out, determining up to 21%(w/w) of protein content (for a nitrogen factor of 4.9) with high content of essential amino
acids, 37% (w/w) of carbohydrate fraction and high amount of ash, 22% (w/w). The effect of temperature, in the range from 129
to 200 °C, and flow rate, in the range from 2 to 6 mL min−1, on protein and carbon fraction extraction/hydrolysiswas studied.At
constant flow rate of 2 mL min−1, a maximum in the protein extraction was achieved at 185 °C. Higher temperatures led to
degradation of protein or its hydrolysis products. Free amino acids release followed the same trend as the protein fraction. The
most temperature sensitive amino acids, as determined by gas chromatography (EZ:faast Phenomenex), were serine and aspartic
and glutamic acids. As a consequence, the selectivity towards non-polar amino acids increased by working at high severity
factors. A Pearson correlation between antioxidant capacity of the collected extracts with the bioactive compounds determined in
the extracts (total polyphenolic compounds –TPC-, peptides and free amino acids) was established, being stronger for TPC. The
ash content in the solid residue after treatment steadily increased with temperature due to non-solubilization being possible its
application in agriculture as fertilizers.
eng
Subcritical water extraction
Biorefinery
Macroalgae residue
Protein
Amino acids
Antioxidant activity
Recovery of the protein fraction with high antioxidant activity from red seaweed industrial solid residue after agar extraction by subcritical water treatment
info:eu-repo/semantics/article
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
URL
https://riubu.ubu.es/bitstream/10259/6027/1/Trigueros-jap_2021.pdf
File
MD5
82b0814bb837f4440a6fd5f4f9ba9600
731909
application/pdf
Trigueros-jap_2021.pdf