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1/2006 - Potravinárstvo

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∆E<br />

18<br />

16<br />

14<br />

12<br />

10<br />

8<br />

6<br />

4<br />

2<br />

0<br />

<strong>Potravinárstvo</strong><br />

80ºC 140ºC 180ºC 80ºC 140ºC 180ºC 80ºC 140ºC 180ºC<br />

Flaxseed oil Walnut oil Linola oil<br />

Figure 1. Colour changes (∆E) of oils rich in polyunsaturated fatty acids during heating at different temperatures.<br />

oxidative stability (h)<br />

1.8<br />

1.6<br />

1.4<br />

1.2<br />

1<br />

0.8<br />

0.6<br />

0.4<br />

0.2<br />

0<br />

flaxseed walnut<br />

kind of oil<br />

linola<br />

Figure 2. Oxidative stability of oils rich in polyunsaturated fatty acids after heating for 120 minutes at different<br />

temperatures.<br />

ročník 4 33 1/2010<br />

15 min<br />

30 min<br />

60 min<br />

120 min<br />

without heating<br />

80ºC<br />

140ºC<br />

180ºC

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