Evaluation and Characterization of Protein Isolates from Poultry Processing Industries by-Product
Janise Pedroso Colembergue, Dennis Gomes Rios, Carlos Prentice

Abstract
Brazil is one of the largest global producers of poultry meat and can thus be considered a large producer of byproducts from poultry industries. The objective of this study was to obtain a protein isolate from feather and blood meal and to evaluate the extraction process at different times. The proximal composition of three different feather and blood meals resulted between 4.69-13.59% moisture, 60.17-79.97% protein, 12.76-17.06% fat, and 2.95-10.14% ash on a wet basis. We observed that the extraction for 6 h showed the highest breakage of disulfide bonds. The spectroscopy Fourier transform infrared analysis revealed characteristic bands of protein, and characteristic bands of cysteine and cysteic acid, indicating breakage of disulfide bonds. Differential scanning calorimetry analysis of protein isolate showed that there were two endothermic transitions. With this study, it was possible to obtain protein isolates from feather and blood meal with potential application in processing of proteinous bioplastics.

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