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Research note
olarewaju Michael oluba
Landmark University
Corresponding Author
ORCiD: https://orcid.org/0000-0002-5107-6959
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Objective The hydrolysis of chicken feather waste was carried out using sodium hydroxide and the hydrolysed feather solution precipitated using different acids (nitric acid, sulfuric acid, hydrochloric acid and trichloroacetic acid). Hydrolysates of the different acids were evaluated for antioxidant activity via 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging, ferric reducing power and metal chelating activities. In addition, the in vitro protein digestibility of the respective acid hydrolysates was carried out.
Results: Data obtained showed that nitric acid-precipitated hydrolysate had the highest DPPH scavenging activity while the hydrolysate precipitated with trichloroacetic acid exhibited the highest ferric (Fe3+) reduction potential. On the other hand, trichloroacetic acid-, sulfuric acid- and nitric acid-precipitated hydrolysates showed similar metal chelating potential compared to hydrochloric acid-precipitated hydrolysate with the least chelating potential. The in vitro protein digestibility of the different hydrolysates ranged from 62.30 ± 1.0% (nitric acid) to 73.10 ± 1.3% (trichloroacetic acid) and were significantly (p < 0.05) higher compared to 23.80 ± 0.5% (raw feather). These results indicate that alkaline-hydrolysed chicken feather hydrolysate may be useful as supplementary protein and antioxidants in animal feed formulations.
Keywords
Chicken feather waste, waste valorisation, protein digestibility, food deterioration
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A new preprint design is coming!
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Research note
olarewaju Michael oluba
Landmark University
Corresponding Author
ORCiD: https://orcid.org/0000-0002-5107-6959
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
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History
CURRENT STATUS: Posted
Version 1
Posted 16 Sep, 2019
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Objective The hydrolysis of chicken feather waste was carried out using sodium hydroxide and the hydrolysed feather solution precipitated using different acids (nitric acid, sulfuric acid, hydrochloric acid and trichloroacetic acid). Hydrolysates of the different acids were evaluated for antioxidant activity via 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging, ferric reducing power and metal chelating activities. In addition, the in vitro protein digestibility of the respective acid hydrolysates was carried out.
Results: Data obtained showed that nitric acid-precipitated hydrolysate had the highest DPPH scavenging activity while the hydrolysate precipitated with trichloroacetic acid exhibited the highest ferric (Fe3+) reduction potential. On the other hand, trichloroacetic acid-, sulfuric acid- and nitric acid-precipitated hydrolysates showed similar metal chelating potential compared to hydrochloric acid-precipitated hydrolysate with the least chelating potential. The in vitro protein digestibility of the different hydrolysates ranged from 62.30 ± 1.0% (nitric acid) to 73.10 ± 1.3% (trichloroacetic acid) and were significantly (p < 0.05) higher compared to 23.80 ± 0.5% (raw feather). These results indicate that alkaline-hydrolysed chicken feather hydrolysate may be useful as supplementary protein and antioxidants in animal feed formulations.
Figure 1
Figure 2
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