title: Effects of Soy Protein Hydrolysates Prepared by Varying Subcritical Media on the Physicochemical Properties of Pork Patties.
abstract: This study investigated the effect of soy protein hydrolysates (SPH) prepared by varying subcritical media on the physicochemical properties of pork patties. For resource of SPH, two different soybean species (Glycine max Merr.) of Daewonkong (DWK) and Saedanbaek (SDB) were selected. SPH was prepared by subcritical processing at 190℃ and 25 MPa under three different of media (water, 20% ethanol and 50% ethanol). Solubility and free amino group content revealed that water was better to yield larger amount of SPH than ethanol/water mixtures, regardless of species. Molecular weight (Mw) distribution of SPH was also similar between two species, while slightly different Mw distribution was obtained by subcritical media. For pork patty application, 50% ethanol treatment showed clear red color comparing to control after 14 d of storage. In addition, ethanol treatment had better oxidative stability than control and water treatment based on thiobarbituric acid-reactive substances (TBARS) analysis. For eating quality, although 20% ethanol treatment in SDB showed slightly higher cooking loss than control, generally addition of SPH did not affect the water-binding properties and hardness of pork patties. Consequently, the present study indicated that 50% ethanol was the best subcritical media to produce SPH possessing antioxidant activity, and the SPH produced from DWK exhibited better antioxidant activity than that produced SDB.
authors: Department of Food Science and Technology, Sejong University, Seoul 05006, Korea.
authors: Yun-Kyung
authors: YK
authors: Lee
authors: Department of Food Science and Technology, Sejong University, Seoul 05006, Korea.
authors: Bo-Bae
authors: BB
authors: Ko
authors: Department of Bioresources and Food Science, Konkuk University, Seoul 05029, Korea.
authors: Munkhtugs
authors: M
authors: Davaatseren
authors: Department of Food Science and Technology, Sejong University, Seoul 05006, Korea.
authors: Geun-Pyo
authors: GP
authors: Hong
keywords: antioxidant activity; ethanol; hydrolysates; soybean; subcritical water