The heating or frying was carried outin intermittent mode. Five batches of heating or frying (each 3min) were conducted in a day without any time lag, which was referred as heating/frying cycles.This exercise was repeated for 6 consecutive days. For each frying experiment, 6 pooris were taken for each batch. After each cycle, the fryer was put off and heated oil was allowed to cool to ambient temperature (25 ± 1 ◦C).