Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/8615
Título: Contribution of each major wine phenolic family to the polyphenols index (IPT) evaluation
Autor: Patistis, Andreas
Orientador: Silva, Jorge Manuel Ricardo
Palavras-chave: phenolic content
total polyphenolic index
phenolic families
UV spectrophotometer
Data de Defesa: 2012
Editora: ISA/UL
Citação: Patistis, A. - Contribution of each major wine phenolic family to the polyphenols index (IPT) evaluation. Lisboa: ISA, 2012, 72 p.
Resumo: Wines are an important source of phenolic compounds. Red wines have a polyphenol content (especially tannins but also anthocyanins, flavonols, resveratrol and phenolic acids) considerably higher and different than whites. The phenolic content of wines is often described by two values that are called IPT and is representative of the total phenolic profile and anthocyanin index that is representative of the anthocyanins of a wine. The goal of this study is to try understanding how the different phenolic families contribute to the total polyphenolic index of the wine. For this reason representative compounds of some major phenolic families have been studied. The molecular absorbance was measured by a UV spectrophotometer at wavelength of 280 nm. From the result we calculated the polyphenolic index per milligram and the polyphenolic index of each compound used. This gave us an idea of the ‘’weight’’ that the different molecules have. Continuously combinations in pairs were made in order to try simulate better the wine environment. From the result obtained, we understood that total polyphenolic index per milligram for wine is a very complicated variable based both, in the ‘’weight’’ that the phenolic compounds have but also in the proportion that can be found in wine
Descrição: Mestrado Vinifera EuroMaster - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/8615
Aparece nas colecções:BISA - Dissertações de Mestrado - Vinifera EuroMaster

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