Compound enzymatic hydrolysis of feather waste to improve the nutritional value

Zhou, Lian; Xie, Xianmei; Wu, Tianfu; Chen, Meibiao; Yao, Qing; Zhu, Honghui; Zou, Weilin

doi:10.1007/s13399-020-00643-y

Cited by 12 publications

(5 citation statements)

References 60 publications

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“…In contrast, enzyme hydrolysis not only increased the DH and prevented nutrient damage during processing but also produced more soluble peptides, such as lysine and glutamic acid, which played an important role in palatability. 27 Our data also indicated that the DH and amino acid content increased in enzyme-hydrolyzed okara (Fig. 1 and Table 1), besides, more BCAAs (valine, leucine, and isoleucine) were released after enzyme hydrolysis.…”

Section: Discussionsupporting

confidence: 70%

Anti-fatigue effects of enzyme-hydrolyzed okara in C2C12 myotubes and Sprague–Dawley rats

et al. 2022

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Section: Discussionsupporting

confidence: 70%

Anti-fatigue effects of enzyme-hydrolyzed okara in C2C12 myotubes and Sprague–Dawley rats

et al. 2022

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“…Additionally, the in vitro digestibility and protein solubility both rose by 10.27 and 20.75 times, respectively. These results indicate that improving the nutritional value of feather waste by CEH may be a promising strategy (Zhou et al, 2020). The significant degradation of chicken feather waste which present in chicken feather medium was an indication that the fungal species showed potentials as industrially important organisms.…”

Section: Discussionmentioning

confidence: 81%

Feather Degrading Fungi: Isolation, Identification and Measuring the Proteolytic Activity Using Solid-State Fermentation Technique

Derhab

El-Metwally

Mabrouk

et al. 2022

Journal of Agricultural and Environmental Sciences

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The rapid growth of the poultry industry has been associated with an increase in the production of keratincontaining residues (feathers are most abundant). Keratinolytic microorganisms have become biotechnologically important since they target the hydrolysis of highly rigid keratin. The main aim of the recent study was to isolate Aspergilli that have a keratinolytic activity. The keratinolytic fungi were isolated from three different places containing keratinous wastes. For cultivating these organisms, a solid-state fermentation (SSF) media was used containing feather as the only source of carbon and nitrogen. Then, we used Potato dextrose agar (PDA) media for purification and identification of isolates, by studying their culture and microscopic characteristics. Based on our results, we obtained four keratinolytic fungal species; namely, Aspergillus terreus, Aspergillus nidulans, Aspergillus niger, and Aspergillus fumigatus. The total protein content in the

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“…The protein solubility and in vitro digestibility also increased 20.75 and 10.27 times, respectively. These results suggest that CEH can be a promising approach to improve the nutritional value of feather waste (Zhou et al 2020).…”

Section: Animal Feedmentioning

confidence: 75%

Industrial sustainability of microbial keratinases: production and potential applications

Menezes

Santos

et al. 2021

World J Microbiol Biotechnol

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Keratinases are proteolytic enzymes with a particular ability to cleave peptide bonds in keratin, and in other proteins. Due to their broad-spectrum of activity, keratinases are considered viable substitutes for chemical and thermal treatments of proteinrich industrial by-products. Among these protein residues, special attention has been given to keratinous materials (feathers, hair, horns, etc.), which disposal through harsh conditions methods, such as acid/alkaline hydrolysis or incineration, is not considered ecologically safe. Microbial keratinolytic enzymes allow for keratin degradation under mild conditions, resulting in keratin hydrolysates containing undamaged amino acids and peptides. In this review article, we offer perspectives on the relevance of these unique biocatalysts and their revolutionary ascent in industries that generate keratin-rich wastes. Additionally, we share insights for applications of keratinases and protein hydrolysates in agriculture, animal feed, cosmetics, phamaceuticals, detergent additives, leather processing, and others. Due to the scientific importance of keratinases and their potential use in green technologies, searching for bacterial and fungal species that efficiently produce these enzymes may contribute to the sustainability of industries.

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Compound enzymatic hydrolysis of feather waste to improve the nutritional value

Cited by 12 publications

References 60 publications

Anti-fatigue effects of enzyme-hydrolyzed okara in C2C12 myotubes and Sprague–Dawley rats

Anti-fatigue effects of enzyme-hydrolyzed okara in C2C12 myotubes and Sprague–Dawley rats

Feather Degrading Fungi: Isolation, Identification and Measuring the Proteolytic Activity Using Solid-State Fermentation Technique

Industrial sustainability of microbial keratinases: production and potential applications

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