Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6458
Título: Effect of skin contact and oxygenation of muts on the composition of white port wine
Autor: Ho, Peter
Rogerson, Frank S.S.
Watkins, Steve J.
Silva, Maria da Conceição M.
Hogg, Timothy A.
Vasconcelos, Isabel
Palavras-chave: White port wine
Hyperoxidation
Skin contact
Phenolic compounds
Monoterpene alcohols
Data: 1999
Editora: Lavoisier
Citação: HO, Peter... [et al.] - Effect of skin contact and oxygenation of muts on the composition of white port wine. Sciences des Aliments. ISSN 0240-8813. Vol. 19 (1999), p. 668-699
Resumo: White port wine were made from Malvaela Fina and Rabigata gaps musts that were subjected to different combinations of skin contact and must oxygenation. Increasing skin contact times increased the total phenolics. Total hydroxycinnamoyl tartaric acid, total flavonoids and the formation of brown pigments in the tree-run musts. Both air exposure and hyperoxidation were effective in lowering the concentration of hydroxycinnamoyl tartaric acids and flavonoids it newly fermented wines. Hyperoxidation seemed more effective in removing this phenolic compounds and U1 reducing browning than air expo- sure In wines which had 8 and 25 h of akin contact. Phenolic compounds increased with wood ageing. Although the concentration of hydroxycinnamic acide were lower In all oxygenated wines than in the controls. However must oxygenation prior to fermentation could not prevent further browning of the wines, caused by the production of furans and the increase of flavonoids during that ageing it wood. increasing skin contact generally increased the total monoterpene alcohol concentration for hyperoxidised whesm with some increases it air exposed wines. Total monoterpene alcohol concentration was higher Hyperoxidised than in air exposed wines, made from musts with 8 and 25h of skin contact, after 18 months of wood ageing.
Peer review: yes
URI: http://hdl.handle.net/10400.14/6458
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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