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
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Authors: MIHAELA VLASSA, FILIP MIUȚA, IONELIA TARANU, DANIELA MARIN, CĂTĂLIN DRAGOMIR.
DOI: 10.24193/subbchem.2024.1.07
Published Online: 2024-03-30
Published Print: 2024-03-30
pp. 107-120
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Some parts of agro-wastes (pomace meal) are used for animal food containing variability in composition (proteins, dietary fibres, carbohydrates, polyphenols, minerals). This paper aims at evaluating some nutraceutical bioactive compounds from pomace meal for use as animal feed additives. Studied meals are pomace obtained from solid remains of grapes and sea buckthorn after juice pressing, as well as flaxseed and rapeseed after oil pressing. HPLC methods were used to determine some carbohydrates (glucose, fructose, sucrose, maltose), organic acids (oxalic, citric, tartaric, malic), flavonoids (catechin, epicatechin, rutin, quercetin, luteolin) and phenolic acids (gallic, vanillic, caffeic, p-coumaric, ferulic). The content of total polyphenolic compounds and the antioxidant activity (DPPH and ABTS assays) of the pomace meals were evaluated by spectrophotometry. The results obtained show that the carbohydrates quantities (mg/100 g) in pomace meals were between 2943.31 (grapeseed) and 3210.11 (rapeseed). Sea buckthorn contains the most important amount of total organic acids of 8078.89 mg/100 g. Also, the highest quantities (mg/100 g) of total polyphenolic compounds were found in grapeseed (10789) and flaxseed (8537), respectively. These findings indicate a good source of carbohydrates, organic acids and polyphenols (phenolic acids and flavonoids) therefore these meals can be used as animal feed additives.
Keywords: bioactive compounds, animal feed additives, HPLC, total phenolic compounds, antioxidant activity
