The
glass transition temperature (Tg) of beef was measured at -14 ° C by
differential scanning calorimetry (DSC). The beef was stored at -10
° C (> Tg), 14 ° C (= Tg), - 18 ° C and -22 ° C (<Tg) for 7 months, the effects of vitreous
storage on the quality of beef were studied by measuring the change of color
parameters, tenderness, total number of colonies and Volatile base nitrogen
(TVB-N) during storage, and the dynamic model of beef quality (TVB-N) was established to predict
the shelf life. The results showed that the
L * value was stable with the time prolonged at -14 ℃, -18 ℃ and -22 ℃. The * value increased first and then decreased, and b * increased
gradually. -10 ℃ when the L * value decreases significantly, a * value is gradually
reduced. The shear stress of beef
under the four storage temperatures increased first and then decreased. The total number of
colonies is on the rise. TVB-N values increase gradually with the storage time. According to the Arrhenius
equation, the dynamic model of predicting the shelf life of frozen storage was
established with TVB-N as the index. The Ea value was 0.2 KJ / mol and the
pre-exponent K0was 0.0042.
DONG Huan et al
. Effect of glass transition temperature on the quality of frozen beef[J]. Food and Fermentation Industries, 2018
, 44(2)
: 240
.
DOI: 10.13995/j.cnki.11-1802/ts.014811