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Joint International Conference on Long-term Experiments ...

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CONCLUSIONS<br />

The water c<strong>on</strong>tent in the centre of the loaf rises during the baking process. The water moves<br />

towards the centre by the evaporati<strong>on</strong> of water vapour near the surface, where the<br />

temperature is high, and c<strong>on</strong>densati<strong>on</strong> closer to the centre, where the temperature is lower.<br />

There is a change in the measured water c<strong>on</strong>tent when the temperature reaches 70±5 0 C. This<br />

implies that the chemical changes that cause the bread to change from dough to crumb and<br />

open up the pore structure occur just prior to this temperature interval. The transport<br />

towards the centre starts when the temperature has reached 70±5 0 C and stops when the<br />

temperature reaches 100 0 C and there is no temperature gradient left. The coldest regi<strong>on</strong><br />

occurs just below the geometrical centre and the water vapour moves towards that regi<strong>on</strong>.<br />

As can be seen in the objectives, the c<strong>on</strong>clusi<strong>on</strong>s fulfil the aims of this research work.<br />

REFERENCES<br />

MARSTON, P. E. AND WANNAN, T. L. Bread baking the transformati<strong>on</strong> from dough to<br />

bread. The Bakers Digest, 50( 4 ), 24-49 ,1976.<br />

THORVALDSSON, K. AND SKJOLDEBRAND, C. Water Transport in Meat during<br />

Reheating. Journal of Food Engineering, 29, 13-21, 1996.<br />

KOKINI, J. L., LAI, L. S. AND CHEDID, L. L. Effect of Starch Structure <strong>on</strong> Starch<br />

Rheological Properties. Food. Technology, 46 (6) , 124-139, 1992.<br />

SKJOLDEBRAND, C. Heat and Mass Transfer in Baking of Bread. SIK Service Series No.<br />

752, 1986.<br />

AUERMAN, L. J. Backprozess. In: Technologie der Brother stellung. Basel: VEB<br />

Fachbuchverlag, pp. 237-278, 1977.<br />

SLUIMER, P. AND KRIST-SPIT, C. E. Heat transport in dough during the baking of bread.<br />

In: MORTON, I. D. Ed. Cereals in a European C<strong>on</strong>text. Basel: Ellis Horwood Ltd., pp.<br />

355-363, 1987.<br />

DE VRIES, U., SLUIMER, P. AND BLOCKSMA, A. H. A quantitative model for heat<br />

transport in dough and crumb during baking. In: ASP N. G. Ed. Cereal Science and<br />

Technology in Sweden. Basel: Lund University Chemical Centre, pp. 174-188, 1988.<br />

419

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