Pumpkin (C. maxima) seeds were obtained from the local market
(Jung-Ang, Daejeon, Korea). The seeds were dried in a vacuum drier
(Lab companion OV-02, Jeio Tech. Co. Ltd., Korea) at 75 C and
25 kPa for 24 h to a moisture content of 2%. The dried seeds were
then ground in a food grinder (Hanil Science Industrial Co.