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Título: Collagen production from chicken keel bone using acid and enzymatic treatment at a temperature of 30 °C
Autor(es): Cordeiro, Ana Rita Ribeiro de Araújo; et. al.

Palavras-chave: Acid pretreatment
Chicken keel bone cartilage
Pepsin-soluble collagen
Data do documento: 2020
Citação: Food Sci. Technol, Campinas, v. 40, n. 2, p. 491-497, Apr.-June 2020.
Resumo: The aim of this study was to investigate the effect of acid pretreatment, temperature and enzyme concentration on the acid-enzymatic extraction of soluble collagen from chicken keel bone cartilage. A chemical composition analysis and protein profile characterization of this slaughter by-product were also conducted. The cartilages were extracted with 0.5 mol/L of acetic, lactic and citric acids for 24, 48 and 72 hours. Subsequently, optimization with a 22 factorial design was performed with three replications at the central point for a total of 7 experiments; the analyzed response was the collagen content of the obtained isolates. The cartilage under study has a high protein content (90.27% dry basis) consisting of approximately 35.7% collagen and is a source of essential and predominantly hydrophobic amino acids. Pretreatment with acetic acid for 24 hours led to greater extraction potential and consequently, a better collagen yield (30.12%). The electrophoretic profile of the obtained collagens revealed the existence of an α1 chain, indicating that this collagen was type II. Statistical analysis demonstrated that the acid-enzymatic procedure favored a temperature of 30 °C.
ISSN: 1678-457X
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