Frost Formation in Frozen Meat Packaged with Two Plastic Films (LDPE and PVC)
Por:
Melendez-Perez, Rosalia, Rodriguez-Hernandez, Yevit, Arjona-Roman, Jose Luis, Mendez-Albores, Abraham, Coria-Hernandez, Jonathan
Publicada:
1 nov 2022
Resumen:
Frozen food is exposed to inevitable temperature changes during its
storage, transport, and at the point of sale, which implies a
significant impact on its properties and quality. Thus, the study of the
effect of the formation of crystals on both the surface of the meat and
the container when it is kept frozen, involving the thermodynamic
analysis and changes that occurred at the structural level, is
necessary. In this research, pork meat from Longissimus thoracis muscle
was used, which was cut into plates and packed with two types of
food-grade films: (1) Polyvinyl Chloride (PVC) and (2) low-density
polyethylene (LDPE). Samples were frozen by indirect contact with
nitrogen up to -40 +/- 0.5 degrees C and subsequently stored at -20 +/-
1 degrees C in a chamber from 0 to 15 days. The frost thickness was
evaluated by the image superposition method. FTIR spectra were obtained
by means of an Attenuated Total Reflectance (ATR) accessory, and thermal
changes were determined by Modulated Differential Scanning Calorimetry
(MDSC). It was found that the thickness of the frost on the surface of
the meat is less when it is packaged with PVC due to the characteristics
of the polymer matrix of the package. Furthermore, there were important
changes at the molecular level identified by FTIR and MDSC, indicating
significant differences (p < 0.05) between the samples. In general, PVC
films were more stable at lower temperatures, allowing a small number of
changes in the meat surface due to temperature fluctuations.
Filiaciones:
Melendez-Perez, Rosalia:
Univ Nacl Autonoma Mexico, Multidisciplinary Res Unit L13 Thermal & Struct A, Cuautitlan UNAM FESC, Super Studies Fac, Campus 4, Cuautitlan 54714, Mexico
Rodriguez-Hernandez, Yevit:
Univ Nacl Autonoma Mexico, Multidisciplinary Res Unit L13 Thermal & Struct A, Cuautitlan UNAM FESC, Super Studies Fac, Campus 4, Cuautitlan 54714, Mexico
Arjona-Roman, Jose Luis:
Univ Nacl Autonoma Mexico, Multidisciplinary Res Unit L13 Thermal & Struct A, Cuautitlan UNAM FESC, Super Studies Fac, Campus 4, Cuautitlan 54714, Mexico
Mendez-Albores, Abraham:
Univ Nacl Autonoma Mexico, Super Studies Fac Cuautitlan UNAM FESC, Multidisciplinary Res Unit L14 A1 Mat Sci & Techn, Campus 4, Cuautitlan 54714, Mexico
Coria-Hernandez, Jonathan:
Univ Nacl Autonoma Mexico, Multidisciplinary Res Unit L13 Thermal & Struct A, Cuautitlan UNAM FESC, Super Studies Fac, Campus 4, Cuautitlan 54714, Mexico
gold, Gold
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