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Li X, Liu S. Modulation of aroma compounds in yeast and lactic acid bacterium co‐fermented pork hydrolysates by thermal treatment and addition of aroma precursors (cysteine and xylose). Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Xinzhi Li
- Department of Food Science and Technology National University of Singapore Science Drive 2 Singapore 117542 Singapore
| | - Shao‐Quan Liu
- Department of Food Science and Technology National University of Singapore Science Drive 2 Singapore 117542 Singapore
- National University of Singapore (Suzhou) Research Institute No. 377 Linquan Street, Suzhou Industrial Park Suzhou 215123 China
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Optimization of Microbial Hydrolysis Parameters of Poultry By-Products Using Probiotic Microorganisms to Obtain Protein Hydrolysates. FERMENTATION-BASEL 2021. [DOI: 10.3390/fermentation7030122] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In connection with the active growth of poultry processing, the issue of rational use of poultry by-products is urgent. The paper proposes hydrolysis of the gizzards of broiler chickens and hens of the parent stock with bifidobacteria liquid concentrate (BLC) and Propionix liquid concentrated starter culture (Propionix LCSC). The effect of enzymatic treatment on changes in the structural components of the gizzards was studied using scanning electron microscopy (SEM) and determination of the dispersed composition. As a result of the research, the multiple regression equations and the response surfaces were obtained, which describe the optimal parameters of the gizzard´s hydrolysis process. The temperature and the time of hydrolysis are factors that have a significant effect on the degree of hydrolysis. The results of the structural and microscopic analysis confirm the high hydrolysability of the by-products by changing its structure and increasing the number of smaller protein particles. It was found experimentally that the gizzards of hens are more susceptible to the action of probiotic microorganisms’ enzymes compared to the gizzards of broiler chickens.
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