Changes of the dielectric parameters of fresh hen eggs during storage were investigated for the development of a method to assess the main quality indices. Dielectric constant and loss factor were measured in the frequency range 20–1800 MHz using an open-ended coaxial probe on thick albumen and yolk of eggs after 1, 2, 4, 8 and 15 days of storage at room temperature. Tests were also carried out at the 9th day of storage to compare dielectric properties of thick and thin albumen. Statistical analysis was performed at 20, 100, 400, 900 and 1800 MHz. Thick and thin albumen showed slight differences in dielectric properties but significant only for the loss factor at 900 MHz. Dielectric constant and loss factor of yolk generally increased with the storage time. The maximum increment from the 1st to the 15th days of storage (22%,) was registered for the loss factor at 20 MHz. Methods based on the comparison between the experimental loss factor and calculated values by means of conductivity and frequency can potentially be used in predicting eggs’ age.
L. Ragni, A. Al-Shami, G. Mikhaylenko, J. Tang (2007). Dielectric characterization of hen eggs during storage. JOURNAL OF FOOD ENGINEERING, 82(4), 450-459 [10.1016/j.jfoodeng.2007.02.063].
Dielectric characterization of hen eggs during storage
RAGNI, LUIGI;
2007
Abstract
Changes of the dielectric parameters of fresh hen eggs during storage were investigated for the development of a method to assess the main quality indices. Dielectric constant and loss factor were measured in the frequency range 20–1800 MHz using an open-ended coaxial probe on thick albumen and yolk of eggs after 1, 2, 4, 8 and 15 days of storage at room temperature. Tests were also carried out at the 9th day of storage to compare dielectric properties of thick and thin albumen. Statistical analysis was performed at 20, 100, 400, 900 and 1800 MHz. Thick and thin albumen showed slight differences in dielectric properties but significant only for the loss factor at 900 MHz. Dielectric constant and loss factor of yolk generally increased with the storage time. The maximum increment from the 1st to the 15th days of storage (22%,) was registered for the loss factor at 20 MHz. Methods based on the comparison between the experimental loss factor and calculated values by means of conductivity and frequency can potentially be used in predicting eggs’ age.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
