期刊
FOOD BIOSCIENCE
卷 47, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.fbio.2022.101650
关键词
Gelatin; Nile tilapia; Oreochromis niloticus; Fermentation; Pretreatment
资金
- Southern Marine Science and En-gineering Laboratory (Zhanjiang) [ZJW-2019-07]
- Innovation and Development Project about Marine Economy Demonstration of Zhan-jiang City [2017C8B1]
- Innovation Team Construction Project of Modern Agricultural Industry Technology System in Guangdong Prov-ince [2021KJ150]
- Science and Technology plan project of Zhan-jiang City [2019A03021]
This study confirmed the effectiveness of fermentation as a pretreatment in Nile tilapia skin gelatin production. It was found that fermentation-gelatin (FG) had higher recovery, yield, and imino acid content compared to chemical-gelatin (CG). FG also exhibited a more continuous filamentous structure, higher gel strength, and gelling and melting points. These findings suggest that fermentation can be a viable alternative to chemical treatment for gelatin production.
In this study, we aimed to verify the effectiveness of fermentation as a pretreatment in Nile tilapia (Oreochromis niloticus) skin gelatin production and to assess its effects on the extracted gelatin. Chemical-gelatin (CG) and fermentation-gelatin (FG) were extracted using hot water from tilapia skin after immersion in chemical reagents (sodium hydroxide and butanol) and after fermentation with Bacillus velezensis FEL-BM21, respectively. FG presented a higher recovery (27.40%), yield (49.99%), and imino acid (proline and hydroxyproline) content (177.17 & PLUSMN; 0.35 residues/1000 residues) than CG, but had a lower molecular weight. Fourier transform infrared and circular dichroism spectroscopy confirmed that the collagen was denatured, and scanning electron microscopy revealed that FG had a more continuous filamentous structure than CG. Furthermore, except for transmittance (66.19% at 450 nm and 86.36% at 620 nm), FG exhibited higher gel strength (492.81 g), gelling point (28.93 ?degrees C), and melting point (18.33 ?degrees C) than CG. These findings suggest that fermentation can be used to treat gelatin raw materials without negatively affecting the structure of gelatin. Moreover, fermentation has potential industrial applications as an alternative to chemical treatment.
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