Passiflora edulis by-products (PFBP) are a rich source of polyphenols, of which piceatannol has gained special attention recently. However, there are few studies involving environmentally safe methods for obtaining extracts rich in piceatannol. This work aimed to concentrate piceatannol from defatted PFBP (d-PFBP) by means of pressurized liquid extraction (PLE) and conventional extraction, using the bio-based solvents selected with the Hansen solubility parameters approach. The relative energy distance (Ra) between solvent and solute was: Benzyl Alcohol (BnOH) < Ethyl Acetate (EtOAc) < Ethanol (EtOH) < EtOH:H(2)O. Nonetheless, EtOH presented the best selectivity for piceatannol. Multi-cycle PLE at 110 degreesC was able to concentrate piceatannol 2.4 times more than conventional extraction. PLE exhibited a dependence on kinetic parameters and temperature, which could be associated with hydrogen bonding forces and the dielectric constant of the solvents. The acetylcholinesterase (AChE) and lipoxygenase (LOX) IC(50) were 29.420 microg/mL and 27.682 microg/mL, respectively. The results reinforce the demand for processes to concentrate natural extracts from food by-products.
        
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Dos Santos LC, Mendiola JA, Sanchez-Camargo ADP, Alvarez-Rivera G, Vigano J, Cifuentes A, Ibanez E, Martinez J (2021) Selective Extraction of Piceatannol from Passiflora edulis by-Products: Application of HSPs Strategy and Inhibition of Neurodegenerative Enzymes Int J Mol Sci22:
Dos Santos LC, Mendiola JA, Sanchez-Camargo ADP, Alvarez-Rivera G, Vigano J, Cifuentes A, Ibanez E, Martinez J (2021) Int J Mol Sci22: