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- Title
Characterization of some Winery by-Products Used in Animal Feeds.
- Authors
Turcu, Raluca Paula; Olteanu, Margareta; Ropota, Mariana; Mitoi, Monica; Drăgotoiu, Dumitru
- Abstract
Secondary products from winemaking are considered to be a rich source of bioactive compounds, mainly phenolic compounds, which can offer numerous opportunities to improve feed quality. This paper aims to characterize three winery by-products (grape marc, grape seed meal and grape seed oil) with regard to: the primary chemical composition; polyphenol content; antioxidant capacity; fatty acid profile and amino acid profile. Grape marc had 10.43% crude protein, significantly lower (P<0.05) compared to grape seed meal (12.70%). The polyphenols content was significantly different (P<0.05) between the tested raw materials, the highest concentration being found in the grape seed meal (28.05 mg EAG/g) and the smallest in the grape seed oil (0.28 mg EAG/g). Consequently, the antioxidant capacity significantly differentiated (P<0.05) among all raw materials, the highest value of 145.83 mM Trolox / g being recorded at grape seed meal, followed by 9.44 mM Trolox / g in grape marc and 0.70 Mm Trolox / g to grape seed oil. The highest lysine content (0.58 g/100 g SU) was recorded in the marc, while the cystine (0.24 g/100 g SU) was recorded in grape seed grains. The obtained results show that these winery by-products can be used as natural antioxidants in animal feed.
- Subjects
WINERIES; BIOACTIVE compounds; PHENOLS
- Publication
Scientific Papers: Animal Science & Biotechnologies / Lucrari Stiintifice: Zootehnie si Biotehnologii, 2018, Vol 51, Issue 1, p55
- ISSN
1841-9364
- Publication type
Article