Volume 43, Issue 10 e14150
ORIGINAL ARTICLE

Changes of physicochemical properties of greater lizardfish (Saurida tumbil) surimi gels treated with high pressure combined with microbial transglutaminase

Baoyan Guo

Baoyan Guo

Department of Food Science, College of Food Science, South China Agricultural University, Guangzhou, China

Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, Guangzhou, China

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Aimei Zhou

Corresponding Author

Aimei Zhou

Department of Food Science, College of Food Science, South China Agricultural University, Guangzhou, China

Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, Guangzhou, China

Correspondence

Aimei Zhou, Department of Food Science, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, 510642, China.

Email: [email protected]

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Guo Liu

Guo Liu

Department of Food Science, College of Food Science, South China Agricultural University, Guangzhou, China

Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, Guangzhou, China

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Danyang Ying

Danyang Ying

CSIRO Agricultural and Food, Werribee, Victoria, Australia

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Jie Xiao

Jie Xiao

Department of Food Science, College of Food Science, South China Agricultural University, Guangzhou, China

Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, Guangzhou, China

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Jianyin Miao

Jianyin Miao

Department of Food Science, College of Food Science, South China Agricultural University, Guangzhou, China

Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, Guangzhou, China

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First published: 08 August 2019
Citations: 13

Abstract

Effects of high-pressure treatment combined with microbial transglutaminase (MTGase) on the physicochemical properties of greater lizardfish surimi gels were investigated. Five samples were prepared: heating treatment (control), optimal high-pressure treatment (P), optimal MTGase treatment (M), MTGase combined with high pressure (MP), MTGase combined with setting, and high pressure (MSP). MSP exhibited the highest gel strength, a higher water-holding capacity than the control sample. A fibrous structure was viewed in MSP sample under scanning electron microscope, which was due mainly to the greater proportion of hydrogen bonds formed during setting prior to high-pressure treatment and non-disulfide covalent bonding catalyzed by MTGase under high-pressure treatment. The result of sodium dodecyl sulfate–polyacrylamide gel electrophoresis analysis showed that with the addition of MTGase, surimi protein established a tridimensional network. The dynamic rheological results showed that the addition of MTGase enhanced the solid-like nature of the gels.

Practical applications

The optimal process for improving surimi gels of greater lizardfish was determined. The effect of high-pressure treatment after setting could promote the ability of the MTGase to form covalent bonds. A lower pressure was recommended for surimi processing combined with MTGase. The combined treatment offers a technological possibilities for low valued fishes.

CONFLICT OF INTEREST

The authors have declared no conflicts of interest for this article.

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