Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/7515
Título: Relationship between nitrogen content in grape volatiles, namely heavy sulphur compounds, in wines
Autor: Moreira, Nathalie
Pinho, Paula Guedes de
Santos, Cristina
Vasconcelos, Isabel
Palavras-chave: Sulphur compounds
Aliphatic higher alcohols
Ammonium salts
Fermentation
Nitrogen
Yeast nitrogen consumption
White wines
Data: 2011
Editora: Elsevier
Citação: MOREIRA, Nathalie... [et al.] - Relationship between nitrogen content in grape volatiles, namely heavy sulphur compounds, in wines. Food Chemistry. ISSN 0308-8146. Vol. 126, n.º 4 (2011), p. 1599-1607
Resumo: Ammonium salts were added to white grape musts, before alcoholic fermentation, in order to evaluate their influence on the heavy sulphur compound and aliphatic higher alcohol composition of resulting wines. Six grape musts were used (Trajadura, Pedernã, Loureiro, Azal Branco, Avesso and Alvarinho). Ammonium supplementation of Trajadura and Pedernã grape musts, with the highest nitrogen level, did not influence the content of heavy sulphur compounds and aliphatic higher alcohols in wines; however, the addition of ammonium salts to grape musts with low initial nitrogen content, such as Loureiro, Azal Branco and Avesso, led to a higher production of 1-propanol and a lower production of isoamyl alcohols and sulphur compounds, e.g. S-methyl thioacetate, 2-mercaptoethanol, acetic acid-3-(methylthio)propyl ester, 3-mercapto-1-propanol, 4-(methylthio)-1-butanol, 3-(ethyithio)-1-propanol. 3-methylthiopropionic acid and N-3-(methylthiopropyl)acetamide. For Alvarinho grape must, a decrease in sulphur compound concentrations in wines was only observed for 3-methylthiopropionic acid, acetic acid-3-(methylthio)propyl ester and 2-mercaptoethanol.
Peer review: yes
URI: http://hdl.handle.net/10400.14/7515
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0308814610016390
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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