INVESTIGADORES
CIVELLO Pedro Marcos
artículos
Título:
Effect of combined treatment with hot air and UV-C on senescence and quality parameters of minimally processed broccoli (brassica oleracea l. Var italica).
Autor/es:
LEMOINE ML; CIVELLO, PM; CHAVES AR; MARTÍNEZ GA
Revista:
POSTHARVEST BIOLOGY AND TECHNOLOGY
Editorial:
Elsevier
Referencias:
Lugar: Holanda; Año: 2008 vol. 48 p. 15 - 21
ISSN:
0925-5214
Resumen:
Combined treatments with hot air and UV-C were applied to minimally
processed broccoli (Brassica oleracea L.) florets to investigate their effects
on several quality and senescence parameters. To select the optimum treatment,
florets were treated with three temperatures (42, 45 and 48 ◦C) for 3 h and
three UV-C doses (5, 8 and 10 kJm−2) in all combinations and then placed in
darkness at 20 ◦C. In general, results suggest that the effect of heat was more
important than that of UV-C to prolong postharvest life of broccoli florets. Treatment
at 48 ◦C combined with a UV-C dose of 8 kJm−2 caused the higher retention of green color and the higher
maintenance of organoleptical quality and was chosen to analyze its effect on
other parameters during storage. The selected combined treatment delayed both
yellowing and chlorophyll degradation during storage. Moreover, treated broccoli florets showed a higher retention of protein
content in relation to controls. The treatment did not affect the total content
of sugars but greatly reduced the level of reducing sugars. Results indicate
that a combined treatment of UV-C and heat could be a useful method to delay
postharvest senescence of minimally processed broccoli during storage at 20 ◦C.