Effect of different thermal processing methods on sensory, nutritional, physicochemical and structural properties of Penaeus vannamei

The aim of this study was to investigate the effect of different thermal processing methods on the nutritional and physicochemical qualities of Penaeus vannamei. Three different thermal processing methods, namely, drying (DS, 120 C-degrees/40 min), steaming (SS, 100 C-degrees/2 min), and microwaving (MS, 600 W/2 min) were used to treat the shrimps. Low-field nuclear magnetic resonance data indicated that fixed water was the main component of Penaeus vannamei. The ratio of fatty acids in MS and DS samples was more in line with the FAO/WHO recommended health requirements; The myofibrillar protein carbonyl group increased, whereas sulfhydryl content decreased after thermal processing, indicating that the proteins were oxidized by thermal processing. The magnitude of oxidation is: MS > SS > DS. Different thermal processing methods can exert great influence on color texture and nutrition to Penaeus vannamei, which can provide a theoretical knowledge for consumers to choose the appropriate processing method.

Automated summary

The aim of this study was to investigate the effect of different thermal processing methods on the nutritional and physicochemical qualities of Penaeus vannamei. The results showed that the ratio of fatty acids in samples treated with microwaving and drying was more in line with the recommended health requirements. Furthermore, thermal processing caused protein oxidation in Penaeus vannamei, with microwaving resulting in the highest degree of oxidation.