A cooking apparatus to improve heating efficiency and to quickly cook food. when measured at a concentration of 1% by weight in a 20% sodium chloride aqueous solution containing said ester. The method can be further refined to obtain the average maximum, the maximum, the average minimum andor the minimum, pressure load for each wall, andor for each floor andor for each wall of each floor andor for the building as a whole. First and second capacitor blocks connected to the oscillating unit and the active element unit provide first and second load capacitances, respectively, to the first and second nodes, respectively, in response to the control code. The inventive cell populations may be used for cell therapies for the treatment of various neurological diseases and as substrates in pharmacological assays.