Effect of ultraviolet light on viscoelastic properties of fresh-cut apple

GOMEZ, P.; SALVATORI, D M; ALZAMORA, STELLA MARIS

Minascentro, Belo Horizonte - Brasil

Congreso; XXI Congresso Brasileiro de Ciencia e Tecnologia de Alimentos – XV Seminario Latinoamericano e do Caribe de Ciencia e Tecnologia de Alimentos; 2008

The effect of UV-C light on linear viscoelastic characteristics of fresh-cut apple slices was analyzed by dynamic oscillatory shear and creep tests. The storage modulus (G’) was lower in irradiated samples than in fresh fruit. The instantaneous compliance (J0), retarded compliances (J1 and J2) and steady-state viscous compliance (1/hN) increased after 7 day storage at 4-5ºC in treated samples. The rheological response of apple tissue was correlated with microstructure and ultrastructure features.