UNIVERSIDADE DE AVEIRO;DAO SUL - SOCIEDADE VITIVINICOLA S.A.
发明人:
Manuel Antonio Coimbra Rodrigues da Silva,Claudia Sofia Cordeiro Nunes,Elia Sofia Oliveira Maricato,Angela Maria Martins Vieira da Cunha,Sonia Alexandra Leite Velho Mendo Barroso,Jose Antonio Lopes da
申请号：
US14355773
公开号：
US20140328974A1
申请日:
2012.11.02
申请国别(地区):
US
年份:
2014
代理人:
摘要：
The present invention relates to a winemaking process using the traditional method of vinification except that, after fermentation, a chitosan-based film is placed in contact with the wine and no sulfur dioxide is added. The present invention also relates to a process for preparation of a chitosan-based film by modification of the chitosan with natural compounds, which allows to produce chitosan films stable in acidic medium, with high antioxidant activity, while maintaining the antimicrobial activity. In one embodiment, the films are prepared by covalent linkage to the chitosan of molecules, such as genipin, which results in decreasing its solubility in acidic medium, and also of molecules with high antioxidant activity, such as caffeic acid, or grape and wine extracts rich in compounds with antioxidant activity.
