ABSTRACT ‘Alto’variety canola seed and yellow sesame seed were toasted at 180, 200, 220, 240 and 260C for 8 min and 10 min, respectively. Control oils from nontoasted seeds were also evaluated. Oils from ground canola and sesame seed were extracted with hexane at 25C for 10 h. Two ranking tests for odor preference were performed by a Korean panel. Among the canola oils, oil for seeds toasted at 240C was significantly better, and oil from seed toasted at 200C was significantly (p ≤ 0.05) worse than the others. Oils from sesame seed toasted at 220 and 260C were significantly better and untoasted and toasted sesame seed oil at 180C were significantly (p ≤ 0.05) worse than the other sesame seed oils. A second ranking test was performed to find the best oil among the canola and sesame seed oils. The toasted sesame seed oil at 260C was significantly better, and the toasted canola oil at 200C was significantly (p ≤ 0.05) worse. Among the other toasted oils, canola oil toasted at 240 and 260C and sesame seed oil toasted at 220 and 240C were not significantly different from each other. The ranking test showed that toasted canola oils were not significantly different from toasted sesame seed oils except toasted sesame seed oil at 260C.
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Park et al. (1997) studied this question.
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