April 18/Food Hydrocolloids -- In "Modifications of Soy Protein Isolates Using Combined Extrusion Pre-treatment and Controlled Enzymatic Hydrolysis for Improved Emulsifying Properties," appearing in the July 2011 issue of Food Hydrocolloids, Lin Chen, Jianshe Chen, Jiaoyan Ren, Mouming Zhao investigated the effects of combined extrusion pre-treatment and controlled enzymatic hydrolysis on the physico-chemical properties and emulsifying properties of soy protein isolates (SPI). Results showed that extrusion pre-treatment caused a marked improvement in the accessibility of SPI to enzymatic hydrolysis, resulting in changes in degree of hydrolysis (DH), protein solubility (PS), surface hydrophobicity (H0) and molecular weight distributions (MWD) for ESPIH (extrusion pre-treated SPI hydrolysates).