2.3.3. Determination of kinematic viscosity of oils Kinematic viscosity of the RBO before and after heating and frying was measured with a CannonTM Ubbelohde calibrated capillary viscometer (size 75, Cannon Instrument Company, State College, Pennsylvania) by the procedure reported by Debnath et al. (2010). A T-type thermocouple was inserted directly into the oil to monitor its temperature during the experiment.