resumo
Featured Application New opportunities for winemaking industries are open by the use of chitosan-genipin films as technological adjuvant for white wine preservation to replace sulfur dioxide, maintaining their varietal key odorants and organoleptic characteristics. Chitosan-genipin films have been proposed for preservation of white wine, maintaining their varietal key odorants and organoleptic characteristics of sulfur dioxide treated wines. Nevertheless, these wines showed aroma notes that slightly distinguish them. It is possible that during the contact of films with wine for at least 2 months, after fermentation and prior to bottling, interactions or chemical reactions are promoted. In this work, wine model solutions with volatile compounds in contact with chitosan-genipin films were performed to evaluate their evolution along time. To complement these analyses, the volatile compounds of white and red wines kept in contact with chitosan-genipin films during 2 and 8 months were also studied. The results obtained allowed us to conclude that the contact of chitosan-genipin films with both white and red wines tend to retain long carbon chain volatile compounds, such as ethyl hexanoate and octan-3-one. It also promoted the formation of Maillard reaction products, such as furfural by dehydration of pentoses and Strecker aldehydes, such as 3-methylbutanal and phenylacetaldehyde, by degradation of amino acids. This study reveals that the use of chitosan-genipin films for wine preservation is also able to promote the formation of compounds that can modulate the wines aroma, maintaining the varietal notes.
palavras-chave
HIGH-PRESSURE TREATMENTS; FINING AGENTS; RED WINE; WHITE; STABILITY; BENTONITE; QUALITY; OCHRATOXIN; EVOLUTION; CHARACTER
categoria
Chemistry, Multidisciplinary; Engineering, Multidisciplinary; Materials Science, Multidisciplinary; Physics, Applied
autores
Rocha, MAM; Coimbra, MA; Rocha, SM; Nunes, C
nossos autores
Cláudia Nunes
Investigador Auxiliaragradecimentos
This research was also developed within the scope of the project CICECO-Aveiro Institute of Materials (UIDB/50011/2020 and UIDP/50011/2020), QOPNA (UID/QUI/00062/2019) and LAQV-REQUIMTE (UIDB/50006/2020), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. M. Angelica M. Rocha and Claudia Nunes thank FCT for the Doctoral (SFRH/BD/98015/2013) and Post-Doctoral fellowships (SFRH/BPD/100627/2014), respectively. This work was also funded by national funds (OE), through FCT, I.P., within the scope of the framework contract foreseen in the numbers 4, 5, and 6 of the article 23, of the Decree-Law 57/2016, of 29 August, changed by Law 57/2017, of 19 July.