บทคัดย่องานวิจัย

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Optimizing the mild heat treatment experiments on broccoli stems using numerical models.

Martens, M.; Scheerlinck, N.; Belie, N. de; Baerdemaeker, J. de;

ASAE/CSAE-SCGR Annual International Meeting, Toronto, Ontario, Canada, 18-21 July, 1999. Year: 1999 Pages: 16 pp. Ref: 17 ref.

1999

บทคัดย่อ

Optimizing the mild heat treatment experiments on broccoli stems using numerical models.

In order to elucidate the effect of a mild heat treatment on the activity of oxidative enzymes, heat transfer in broccoli florets was studied. A conductive heat transfer model with convective boundary conditions was developed and solved using the finite element method. The thermal properties were estimated by means of fitting the model predictions to the temperature recordings at a specific location in the broccoli stem. The computed parameters were used to generate an overall predictive heat transfer model for a variety of heat treatments where the temperature and time intervals can be changed randomly. A kinetic model of enzyme inactivation was linked to the overall heat transfer model. The temperature-time profiles during a number of mild heating and cooling processes were evaluated for the effect of the process on the peroxidase activity. As an application also the lipoxygenase inactivation in asparagus was estimated.