Citas bibligráficas
Yudichi, P., (2023). Recuperación de antocianinas y compuestos fenólicos del residuo de uva isabella (Vitis labrusca) empleando líquidos presurizados [Universidad Nacional de San Martín. Fondo Editorial]. http://hdl.handle.net/11458/5934
Yudichi, P., Recuperación de antocianinas y compuestos fenólicos del residuo de uva isabella (Vitis labrusca) empleando líquidos presurizados []. PE: Universidad Nacional de San Martín. Fondo Editorial; 2023. http://hdl.handle.net/11458/5934
@misc{renati/1055035,
title = "Recuperación de antocianinas y compuestos fenólicos del residuo de uva isabella (Vitis labrusca) empleando líquidos presurizados",
author = "Yudichi Alvarado, Piter",
publisher = "Universidad Nacional de San Martín. Fondo Editorial",
year = "2023"
}
Anthocyanin and phenolic compound recovery from isabella grape (Vitis labrusca) residue using pressurised liquids This research work explored the advantages of recovering anthocyanins and phenolic compounds using pressurised liquid in the extraction of bioactive compounds from Isabella grape residue (Vitis labrusca). The study focused on characterising the proximal composition of grape pomace from the San Antonio District, San Martin Region, evaluating the influence of two factors such as cosolvent and temperature to evaluate the overall extraction yield, antioxidant capacity by methods (DPPH and ABTS), content total phenolic compound (TPC) and total monomeric anthocyanin (TMA) content in dried and crushed grape pomace. The research was carried out firstly with Soxhlet as a conventional method for comparison with the pressurised liquid extraction (PLE) method, using carbon dioxide as a solvent. Two variables were analysed: cosolvent with 100% purity (ethanol and methanol) and temperature (50, 65 and 80 ºC), keeping the pressure constant at 10 MPa and solvent flow rate at 1.5 mL/min. The proximate composition of the grape pomace observed was: fat 4.405%, ash 6.025%, moisture 5.585%, protein 11.49% and carbohydrate 72.495%. PLE extracts were obtained following extraction kinetics. Ethanol at 80°C was the most efficient solvent for extracting total phenols (83.08 ± 0.56 mg GAE/ g raw material on dry basis) and antioxidants (87.33% and 62.19% inhibition by DPPH and ABTS, respectively). Methanol at 80°C gave the highest overall yield (18.16 ± 0.23%) but the lowest content of monomeric anthocyanins (2.16 ± 0.15 mg malvidin 3-glucoside/ g raw material on dry basis and 2.04 ± 0.14 mg cyanidin 3-glucoside/ g raw material on dry basis). The conventional method (Soxhlet) extracted more phenols with ethanol at 80°C (92.07 ± 4.36 g GAE/ g raw material on dry basis) and more anthocyanins with methanol at 65°C (3.32 ± 0.18 mg malvidin 3-glucoside/ g raw material on dry basis and 3.04 ± 0.18 mg cyanidin 3-glucoside/ g raw material on dry basis). It is concluded that the PLE method is an effective technique to obtain bioactive compounds from grape residues and that solvent and temperature are important factors. It is also an effective technique to extract bioactive compounds from grape residue.
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