It is well known that the ability of a material to convert the energy contained in microwave radiation into heat depends on its dielectric properties . Thus, from this perspective, heating will only occur if the dipoles have sufficient time to realign with the oscillating electric field (high frequency) and the speed of realignment (low frequency); otherwise, either no heating occurs or the magnitude of heating will be weak . In addition, it is known that an increase in temperature affects the viscosity of water and, consequently, Brownian movement increases the mobility of water molecules . This affects the orientation of the dipoles .