2020
DOI: 10.3390/foods9040411
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Effects of Immersion Freezing on Ice Crystal Formation and the Protein Properties of Snakehead (Channa argus)

Abstract: This study aimed to evaluate the effect of immersion freezing (IF) at different temperatures on ice crystal formation and protein properties in fish muscle. Snakehead blocks were frozen by IF at −20, −30, and −40 °C, and conventional air freezing (AF) at −20 °C. The size of ice crystals in the frozen samples was evaluated using Image J software. Changes in protein properties were analyzed by Fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC). Snakehead blocks frozen usi… Show more

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Cited by 26 publications
(4 citation statements)
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“…Protein thermal stability is an important parameter in evaluating fish protein stability. As seen in Figure 5 C, DSC thermograms of croaker muscle had two endothermic peaks, peaks 1 and 2, which appeared near 50 °C and 75 °C and represented myosin and actin, respectively [ 17 ]. The denaturation temperature (T max ) and denaturation enthalpy (ΔH) of protein showed a negative correlation with the degree of protein denaturation.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…Protein thermal stability is an important parameter in evaluating fish protein stability. As seen in Figure 5 C, DSC thermograms of croaker muscle had two endothermic peaks, peaks 1 and 2, which appeared near 50 °C and 75 °C and represented myosin and actin, respectively [ 17 ]. The denaturation temperature (T max ) and denaturation enthalpy (ΔH) of protein showed a negative correlation with the degree of protein denaturation.…”
Section: Resultsmentioning
confidence: 99%
“…Changes in thermal stability of proteins were measured using a differential scanning calorimeter (TA Q2000, TA Instruments, New Castle, DE, USA) as previously described by Liu et al [ 17 ] with slight modifications. Thawed samples (10 mg) were accurately weighed and placed in a tightly sealed aluminum pan, while a sealed empty aluminum pan was used as a control group.…”
Section: Methodsmentioning
confidence: 99%
“…Compared with the RF group, the ice crystals in IF group size was finer and more evenly distributed. Since the refrigerant used in immersion freezing has a high heat transfer coefficient, samples can be frozen more rapidly, leading to formation of smaller and more evenly distributed ice crystals (Liu et al, 2020). The addition of ultrasound in UIF treatment caused cavitation which could accelerate the nucleation of ice crystals, while at the same time constantly breaking larger ice crystals into smaller nuclei, promoting the secondary nucleation that have a shorter freezing time.…”
Section: Resultsmentioning
confidence: 99%
“…Further, the larger ice causes more damage to muscle tissue. Liu et al (2020); Sun et al (2019) described that rapid freezing produces smaller ice crystals and, therefore, can preserve the integrity of muscle tissue.…”
Section: Introductionmentioning
confidence: 99%