AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI
În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului.
Autori: SILVIA BURCĂ, CERASELLA INDOLEAN.
DOI: 10.24193/subbchem.2022.3.04
Published Online: 2022-09-30
Published Print: 2022-09-30
pp. 45-60
VIEW PDF
FULL PDF
This paper presents a report about the extraction of resveratrol with ethanol (EtOH) from red grape pomace (RGP) Vitis vinifera L. (Cluj, Transylvania region, Romania) and obtaining a dietary supplement with zinc on grape pomace support. The concentration of resveratrol (Rv) from the extract was spectrophotometrically determined at 305 nm wavelength, and was found to be 145 mg Rv/L. The material resulting after the extraction of resveratrol was processed to obtain a zinc dietary supplement support. The thermodynamic parameters, including Gibbs free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) of Zn2+ biosorption were calculated and the results indicate that the process is endothermic and spontaneous. The Zn2+ biosorption kinetics was analysed using pseudo-first- and pseudo-second-order models. The results indicate that biosorption of Zn2+ aqueous solution onto grape pomace support is best described by the pseudo-second-order model.
Keywords: zinc, resveratrol, red grape pomace, food supplement, biosorption, kinetics
