In order to extend the shelf-life and facilitate distribution, soymilk is
usually subjected to intense heat treatment and commercialized in
aseptic packaging conditions with an unrefrigerated shelf-life of at
least a year (Kwok & Niranjan, 1995). For this purpose, ultra high temperature
(UHT) technology is widely used in food industries, mainly in
Western countries. Although UHT treatment can produce a microbiologically
stable soymilk, it may change the quality aspects that may
compromise shelf-life and nutritional value (Kwok & Niranjan, 1995;
Wang, Xiong, & Wang, 2001).