Comparative study of the yield and physicochemical properties of collagen from Sea Cucumber (Holothuria scabra), Obtained through Dialysis and the Ultrafiltration Membrane 由 Saallah, Suryani, Roslan, Jumardi, Julius, Flavian Sheryl, Saallah, Sharinee, Mohamad Razali, Umi Hartina, Pindi, Wolyna, Sulaiman, Mohd Rosni, Pa’ee, Khairul Faizal, Mustapa Kamal, Siti Mazlina