RT Journal Article
T1 Extraction and characterization of gelatin from skin by-products of seabream, seabass and rainbow trout reared in aquaculture
A1 Valcarcel, Jesús
A1 Hermida Merino, Carolina
A1 Martínez Piñeiro, Manuel
A1 Hermida Merino, Daniel
A1 Rodriguez Vazquez, José Antonio
K1 3105.02 Piscicultura
K1 22 Física
AB The expansion of fish filleting, driven by the increasing demand for convenience food, concomitantly generates a rising amount of skinning by-products. Current trends point to a growing share of aquaculture in fish production, so we have chosen three established aquaculture species to study the properties of gelatin extracted from their skin: rainbow trout, commonly filleted; and seabass and seabream, marketed whole until very recently. In the first case, trout skin yields only 1.6% gelatin accompanied by the lowest gel strength (96 g bloom), while yield for the other two species exceeds 6%, and gel strength reaches 181 and 229 g bloom for seabass and seabream, respectively. These results are in line with the proportion of total imino acids analyzed in the gelatin samples. Molecular weight profiling shows similarities among gelatins, but seabass and seabream gelatins appear more structured, with higher proportion of β-chains and high molecular weight aggregates, which may influence the rheological properties observed. These results present skin by-products of seabream, and to a minor extent seabass, as suitable raw materials to produce gelatin through valorization processes.
PB International Journal of Molecular Sciences
SN 14220067
YR 2021
FD 2021-11-09
LK http://hdl.handle.net/11093/2754
UL http://hdl.handle.net/11093/2754
LA eng
NO International Journal of Molecular Sciences, 22(22): 12104 (2021)
NO Xunta de Galicia | Ref. IN607B 2021/11
DS Investigo
RD 03-oct-2023