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Cyclic voltammetry : a tool to quantify 2,4,6-trichloroanisole in aqueous sampl...

Peres, A. M.; Freitas, P.; Dias, Luís G.; Sousa, Mara E. B. C.; Castro, L. M.; Veloso, Ana C. A.

Chloroanisoles, namely 2,4,6-trichloroanisole, are pointed out as the primary responsible of the development of musty off-flavours in bottled wine, due to their migration from cork stoppers, which results in huge economical losses for wine industry. A prevention step is the detection of these compounds in cork planks before stoppers are produced. Mass spectrometry gas chromatography is the reference method used...


Cyclic voltammetry: a tool to quantify 2,4,6-trichloroanisole in aqueous sample...

Peres, António M.; Freitas, Patrícia; Dias, Luís G.; Sousa, Mara E. B. C.; Castro, Luís M.; Veloso, Ana C. A.

Chloroanisoles, namely 2,4,6-trichloroanisole, are pointed out as the primary responsible of the development of musty off-flavours in bottled wine, due to their migration from cork stoppers, which results in huge economical losses for wine industry. A prevention step is the detection of these compounds in cork planks before stoppers are produced. Mass spectrometry gas chromatography is the reference method used...


Analysis of honey main sugars by size-exclusion chromatography

Sousa, Mara E.B.C.; Peres, António M.; Dias, L.G.; Morais, Jorge Sá; Estevinho, Leticia M.; Machado, Adélio

The main constituents of honey are sugars, mainly the monosaccharides fructose and glucose (reducing sugars), which account for 80% of the total mass, while the disaccharides (especially sucrose and maltose) represent 10%. In general, fructose predominates (giving a sweeter taste to honey than sucrose), although, in some honeys, glucose (that assigns a less sweet taste than sucrose but more than maltose) may be...

Data: 2012   |   Origem: Biblioteca Digital do IPB

Sugar analysis by a multi-sensor system: applying to honey samples

Dias, L.G.; Sousa, Mara E.B.C.; Peres, António M.; Morais, Jorge Sá; Estevinho, Leticia M.; Machado, A.A.S.C.

One of the emerging approaches for analysis of liquid samples with complex matrices is the Electronic Tongue (ET) since it allows evaluating tastes by calibration, mimicking the human tongue. The ET records a pattern of signals that depends on the matrix solution composition, which information is extracted into qualitative and quantitative information by multivariate statistical methods. The chemical sensors us...

Data: 2012   |   Origem: Biblioteca Digital do IPB

Evaluation of an electronic tongue for honey classification according to its po...

Sousa, Mara E.B.C.; Dias, L.G.; Peres, António M.; Estevinho, Leticia M.; Machado, A.A.S.C.

Electronic tongues (ET) have attracted great interest due to its potential to obtain global Information from complex samples that could hardly be obtained by traditional instrumental methods of analysis. These multi-sensor arrays provide a huge amount of sample information which, by applying chemometric methods, allows sample identification/ classification, taste evaluation as well as, multicomponent analysis. ...

Data: 2012   |   Origem: Biblioteca Digital do IPB

A hybrid electronic tongue for direct classification of baby liquid foods with ...

Peres, António M.; Dias, L.G.; Veloso, Ana C.A.; Sousa, Mara E.B.C.; Machado, A.A.S.C.

Data: 2011   |   Origem: Biblioteca Digital do IPB

A hybrid electronic tongue for direct classification of baby liquid foods with ...

Peres, António M.; Dias, L.G.; Veloso, Ana C.A.; Sousa, Mara E.B.C.; Machado, A.A.S.C.

People suffering from celiac disease are gluten intolerant and inadvertent ingestion of gluten proteins must be avoided. Several techniques have been proposed to detect/quantify gluten proteins in foodstuffs: immunochemical methods, mass tandem spectrometry and polymerase chain reaction as well as gluten sensors [1]. Recently, a potentiometric electronic tongue (ET) with lipo/polymeric membranes has been used t...

Data: 2011   |   Origem: Biblioteca Digital do IPB

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