|
|
vol. 10, nr. 1 (2007)
|
Changes in density losses in posts and slices cut out from potato tubers, resulting from water absorption
|
|
|
Zygmunt Sobol
|
|
| (get PDF )
|
|
|
Department of Agricultural and Food Technology, Agricultural University, ul. Balicka 116 B, 30-149 Kraków |
|
|
vol. 10 (2007), nr. 1,
pp. 219-228
|
|
|
abstract:
The paper presents an analysis of changes in density losses resulting from water absorption of objects cut out from potato tubers. The tests were carried out on objects resembling bars and slices for which the ratio of the sorption surface to their volume – index ks – changed from 1.4 to 9.5 cm-1. The investigation included tubers of two potato cultivars, Ibis and Vineta, which were stored for 4.5 and 5.5 months at a temperature of about 6°C and relative humidity of air about 90%. Three variants of sorption time were used – 5, 10 and 15 minutes. Analysis of the results of the investigation shows that the dynamics of changes in density losses in objects characterized by high value of the index ks (4-9.5 cm-1) is sufficient to consider the occurring phenomenon of water absorption as a treatment optimizing the density of semi-products intended for frying. The short water absorption time obtained for semi-products intended for frying, so as to get significant – from the technological point of view – changes in density, is a small fraction (about 15%) of the time needed to produce chips or fried potatoes.
|
|
keywords:
posts and slices from potato tubers, density loss, water absorption
|
|
original in:
Polish
|
|
|
|
|
|
