Artículos de revistas
Effect of gamma irradiation and storage time on microbial growth and physicochemical characteristics of pumpkin (Cucurbita Moschata Duchesne ex Poiret) puree
Fecha
2013-06Registro en:
Gerschenson, Lia Noemi; Campos, Carmen Adriana; Narvaiz, Patricia; Latorre, Maria Emilia; Gliemmo, María Fernanda; Effect of gamma irradiation and storage time on microbial growth and physicochemical characteristics of pumpkin (Cucurbita Moschata Duchesne ex Poiret) puree; Sage Publications; Food Science and Technology International; 20; 1; 6-2013; 71-80
1082-0132
CONICET Digital
CONICET
Autor
Gliemmo, María Fernanda
Latorre, Maria Emilia
Narvaiz, Patricia
Campos, Carmen Adriana
Gerschenson, Lia Noemi
Resumen
The effect of gamma irradiation (0–2 kGy) and storage time (0–28 days) on microbial growth and physicochemical characteristics of a packed pumpkin puree was studied. For that purpose, a factorial design was applied. The puree contained potassium sorbate, glucose and vanillin was stored at 25 ℃. Gamma irradiation diminished and storage time increased microbial growth. A synergistic effect between both variables on microbial growth was observed. Storage time decreased pH and color of purees. Sorbate content decreased with storage time and gamma irradiation. Mathematical models of microbial growth generated by the factorial design allowed estimating that a puree absorbing 1.63 kGy would have a shelf-life of 4 days. In order to improve this time, some changes in the applied hurdles were assayed. These included a thermal treatment before irradiation, a reduction of irradiation dose to 0.75 kGy and a decrease in storage temperature at 20 ℃. As a result, the shelf-life of purees increased to 28 days.