In general, fruit juices are preserved and concentrated by thermal
processes such as pasteurization and vacuum evaporation.
However, the product heating during these processes can change
the natural aroma and flavor of the fresh juice and cause degradation
of thermosensitive compounds such as vitamin C and other
bioactive compounds responsible for its antioxidant activity
(Cassano et al., 2007; Fernandes et al., 2007; Galaverna et al.,
2008).