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Changes of physicochemical properties of greater lizardfish ( Saurida tumbil ) surimi gels treated with high pressure combined with microbial transglutaminase
Author(s) -
Guo Baoyan,
Zhou Aimei,
Liu Guo,
Ying Danyang,
Xiao Jie,
Miao Jianyin
Publication year - 2019
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/jfpp.14150
Subject(s) - chemistry , covalent bond , tissue transglutaminase , disulfide bond , rheology , high pressure , food science , hydrogen bond , scanning electron microscope , chromatography , chemical engineering , biochemistry , materials science , organic chemistry , enzyme , molecule , composite material , engineering physics , engineering
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.