In vitro pepsin digestibility and amino acid composition in soluble and residual fractions of hydrolyzed chicken feathers.

ABSTRACT: Beta-keratin in poultry feathers is a structural protein that is resistant to degradation due to disulfide and hydrogen bonds. Feather meal can be a valuable feed compound if the digestibility can be increased. The objective of the present study was to analyze the effects of chemical, enzymatic, and pressure-thermic treatments for chicken feathers on solubility, in vitro protein digestibility (IVPD), and amino acid composition of solubilized and residual fractions. Two experiments were conducted. In experiment 1, models for solubility and IVPD were developed including the above factors applying a central composite face-centered design. Addition of sodium hydroxide (NaOH) and sodium sulfite (Na2SO3), and autoclaving time affected solubility and IVPD of the feather hydrolysates, but not addi

SUBMITTER: Adler SA 

PROVIDER: S-EPMC6093747 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature