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Victor de Freitas

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Susana Soares; Sophie Thalmann; Susann Kohl; Nuno Mateus; Wolfgang Meyerhof; Victor de Freitas
Different phenolic compounds activate distinct human bitter taste receptors.
André Sousa; Paula Araújo; Nuno Mateus; Vesselin Petrov; Fernando Pina; Victor de Freitas
Thermodynamics, kinetics, and photochromism of oaklins: a recent family of deoxyanthocyanidins.
Frederico Nave; Maria João Ramos; Natércia Teixeira; Patrick Trouillas; Natércia F Brás; Luís Cruz; Olivier Dangles; Florent Di Meo; Nuno Mateus; Victor de Freitas
Influence of a flavan-3-ol substituent on the affinity of anthocyanins (pigments) toward vinylcatechin dimers and proanthocyanidins (copigments).

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All Publications

2013: Susana Soares; Sophie Thalmann; Susann Kohl; Nuno Mateus; Wolfgang Meyerhof; Victor de Freitas
Different phenolic compounds activate distinct human bitter taste receptors.
Journal of agricultural and food chemistry 2013;61(7):1525-33.
2013: André Sousa; Paula Araújo; Nuno Mateus; Vesselin Petrov; Fernando Pina; Victor de Freitas
Thermodynamics, kinetics, and photochromism of oaklins: a recent family of deoxyanthocyanidins.
The journal of physical chemistry. B 2013;117(6):1901-10.
2012: Frederico Nave; Maria João Ramos; Natércia Teixeira; Patrick Trouillas; Natércia F Brás; Luís Cruz; Olivier Dangles; Florent Di Meo; Nuno Mateus; Victor de Freitas
Influence of a flavan-3-ol substituent on the affinity of anthocyanins (pigments) toward vinylcatechin dimers and proanthocyanidins (copigments).
The journal of physical chemistry. B 2012;116(48):14089-99.
2012: Iva Fernandes; Rui Gonçalves; Victor de Freitas; Frederico Nave; Nuno Mateus
On the bioavailability of flavanols and anthocyanins: flavanol-anthocyanin dimers.
Food chemistry 2012;135(2):812-8.
2012: Virgínia C Fernandes; Victor de Freitas; Cristina Delerue-Matos; Valentina F Domingues; Nuno Mateus
Strawberries from integrated pest management and organic farming: phenolic composition and antioxidant properties.
Food chemistry 2012;134(4):1926-31.
2012: Luís Cruz; Nuno Mateus; Victor de Freitas
Identification by mass spectrometry of new compounds arising from the reactions involving malvidin-3-glucoside-(O)-catechin, catechin and malvidin-3-glucoside.
Rapid communications in mass spectrometry : RCM 2012;26(18):2123-30.
2012: Iva Fernandes; Victor de Freitas; Celso Reis; Nuno Mateus
A new approach on the gastric absorption of anthocyanins.
Food & function 2012;3(5):508-16.
2012: Susana Soares; Nuno Mateus; Victor de Freitas
Carbohydrates inhibit salivary proteins precipitation by condensed tannins.
Journal of agricultural and food chemistry 2012;60(15):3966-72.
2012: André Sousa; Ana Fernandes; Nuno Mateus; Victor de Freitas
Synthesis and structural characterization of oaklin-catechins.
Journal of agricultural and food chemistry 2012;60(6):1528-34.
2012: Susana Soares; André Sousa; Nuno Mateus; Victor de Freitas
Effect of condensed tannins addition on the astringency of red wines.
Chemical senses 2012;37(2):191-8.
2012: Rita Vilaça; Maria Amélia Amorim; Laura Carreto; Victor de Freitas; Nuno Mateus; Marta Vaz Mendes; Vanda Mendes; Pedro Moradas-Ferreira; Vítor Costa
Quercetin protects Saccharomyces cerevisiae against oxidative stress by inducing trehalose biosynthesis and the cell wall integrity pathway.
PloS one 2012;7(9):e45494.
2011: Rui Gonçalves; Nuno Mateus; Victor de Freitas
Influence of carbohydrates on the interaction of procyanidin B3 with trypsin.
Journal of agricultural and food chemistry 2011;59(21):11794-802.
2011: Rui Gonçalves; Michel Laguerre; Nuno Mateus; Isabelle Pianet; Victor de Freitas
Mechanisms of tannin-induced trypsin inhibition: a molecular approach.
Langmuir : the ACS journal of surfaces and colloids 2011;27(21):13122-9.
2011: Victor de Freitas; Nuno Mateus
Formation of pyranoanthocyanins in red wines: a new and diverse class of anthocyanin derivatives.
Analytical and bioanalytical chemistry 2011;401(5):1463-73.
2011: Susana Soares; Armando Venâncio; Rui Vitorino; Francisco M L Amado; Ana Fernandes; Nuno Mateus; Hugo Osório; Victor de Freitas
Reactivity of human salivary proteins families toward food polyphenols.
Journal of agricultural and food chemistry 2011;59(10):5535-47.
2011: Joana Oliveira; Vesselin Petrov; A Jorge Parola; Fernando Pina; Joana Azevedo; Natércia Teixeira; Natércia F Brás; Pedro A Fernandes; Nuno Mateus; Maria João Ramos; Victor de Freitas
Chemical behavior of methylpyranomalvidin-3-O-glucoside in aqueous solution studied by NMR and UV-visible spectroscopy.
The journal of physical chemistry. B 2011;115(6):1538-45.
2011: Ana Faria; Nuno Mateus; Diogo Pestana; Ignacio Romero; Diana Teixeira; Babette Weksler; Pierre-Olivier Couraud; Victor de Freitas; Conceição Calhau
Insights into the putative catechin and epicatechin transport across blood-brain barrier.
Food & function 2011;2(1):39-44.
2010: Ana Faria; Diogo Pestana; Diana Teixeira; Victor de Freitas; Nuno Mateus; Conceição Calhau
Blueberry anthocyanins and pyruvic acid adducts: anticancer properties in breast cancer cell lines.
Phytotherapy research : PTR 2010;24(12):1862-9.
2010: Rui Gonçalves; Nuno Mateus; Victor de Freitas
Biological relevance of the interaction between procyanidins and trypsin: a multitechnique approach.
Journal of agricultural and food chemistry 2010;58(22):11924-31.
2010: Rui Gonçalves; Nuno Mateus; Victor de Freitas
Study of the interaction of pancreatic lipase with procyanidins by optical and enzymatic methods.
Journal of agricultural and food chemistry 2010;58(22):11901-6.
2010: Frederico Nave; Vesselin Petrov; Fernando Pina; Natércia Teixeira; Nuno Mateus; Victor de Freitas
Thermodynamic and kinetic properties of a red wine pigment: catechin-(4,8)-malvidin-3-O-glucoside.
The journal of physical chemistry. B 2010;114(42):13487-96.
2010: Luís Cruz; Vesselin Petrov; Natércia Teixeira; Nuno Mateus; Fernando Pina; Victor de Freitas
Establishment of the chemical equilibria of different types of pyranoanthocyanins in aqueous solutions: evidence for the formation of aggregation in pyranomalvidin-3-O-coumaroylglucoside-(+)-catechin.
The journal of physical chemistry. B 2010;114(41):13232-40.
2010: Natércia F Brás; Rui Gonçalves; Nuno Mateus; Pedro Alexandrino Fernandes; Maria João Ramos; Victor de Freitas
Inhibition of pancreatic elastase by polyphenolic compounds.
Journal of agricultural and food chemistry 2010;58(19):10668-76.
2010: Jingren He; Nuno Mateus; Alexandre R F Carvalho; Victor de Freitas
Spectral features and stability of oligomeric pyranoanthocyanin-flavanol pigments isolated from red wines.
Journal of agricultural and food chemistry 2010;58(16):9249-58.
2010: Jingren He; Joana Oliveira; Artur M S Silva; Nuno Mateus; Victor de Freitas
Oxovitisins: a new class of neutral pyranone-anthocyanin derivatives in red wines.
Journal of agricultural and food chemistry 2010;58(15):8814-9.
2010: Frederico Nave; Natércia Teixeira; Nuno Mateus; Victor de Freitas
Hemisynthesis and structural characterization of flavanol-(4,8)-vitisins by mass spectrometry.
Rapid communications in mass spectrometry : RCM 2010;24(14):1964-70.
2010: Ana Faria; Diogo Pestana; Diana Teixeira; Joana Azevedo; Victor de Freitas; Nuno Mateus; Conceição Calhau
Flavonoid transport across RBE4 cells: A blood-brain barrier model.
Cellular & molecular biology letters 2010;15(2):234-41.
2010: André Sousa; Nuno Mateus; Artur Manuel Soares Silva; Nicolas Vivas; Marie-Françoise Nonier; Isabelle Pianet; Victor de Freitas
Isolation and structural characterization of anthocyanin-furfuryl pigments.
Journal of agricultural and food chemistry 2010;58(9):5664-9.
2010: Alexandre R F Carvalho; Joana Oliveira; Victor de Freitas; Nuno Mateus; André Melo
Unusual color change of vinylpyranoanthocyanin-phenolic pigments.
Journal of agricultural and food chemistry 2010;58(7):4292-7.
2010: Iva Fernandes; Ana Faria; Joana Azevedo; Susana Soares; Conceição Calhau; Victor de Freitas; Nuno Mateus
Influence of anthocyanins, derivative pigments and other catechol and pyrogallol-type phenolics on breast cancer cell proliferation.
Journal of agricultural and food chemistry 2010;58(6):3785-92.
2010: Luís Cruz; Natércia F Brás; Natércia Teixeira; Nuno Mateus; Maria João Ramos; Olivier Dangles; Victor de Freitas
Vinylcatechin dimers are much better copigments for anthocyanins than catechin dimer procyanidin b3.
Journal of agricultural and food chemistry 2010;58(5):3159-66.
2010: Ana Faria; Rosário Monteiro; Diogo Pestana; Fátima Martel; Victor de Freitas; Nuno Mateus; Conceição Calhau
Impact of culture media glucose levels on the intestinal uptake of organic cations.
Cytotechnology 2010;62(1):23-9.
2009: Iva Fernandes; Nuno Vale; Victor de Freitas; Rui Moreira; Nuno Mateus; Paula Gomes
Anti-tumoral activity of imidazoquines, a new class of antimalarials derived from primaquine.
Bioorganic & medicinal chemistry letters 2009;19(24):6914-7.
2009: Ana Fernandes; Iva Fernandes; Luís Cruz; Nuno Mateus; Miguel Cabral; Victor de Freitas
Antioxidant and biological properties of bioactive phenolic compounds from Quercus suber L.
Journal of agricultural and food chemistry 2009;57(23):11154-60.
2009: Luís Cruz; Natércia F Brás; Natércia Teixeira; Ana Fernandes; Nuno Mateus; Maria João Ramos; José Rodríguez-Borges; Victor de Freitas
Synthesis and structural characterization of two diasteroisomers of vinylcatechin dimers.
Journal of agricultural and food chemistry 2009;57(21):10341-8.
2009: Ana Faria; Diogo Pestana; Joana Azevedo; Fátima Martel; Victor de Freitas; Isabel Azevedo; Nuno Mateus; Conceição Calhau
Absorption of anthocyanins through intestinal epithelial cells - Putative involvement of GLUT2.
Molecular nutrition & food research 2009;53(11):1430-7.
2009: Susana I Soares; Rui M Gonçalves; Iva Fernandes; Nuno Mateus; Victor de Freitas
Mechanistic approach by which polysaccharides inhibit α-amylase/procyanidin aggregation.
Journal of agricultural and food chemistry 2009;57(10):4352-8.
2009: Iva Fernandes; Joana Azevedo; Ana Faria; Conceição Calhau; Victor de Freitas; Nuno Mateus
Enzymatic hemisynthesis of metabolites and conjugates of anthocyanins.
Journal of agricultural and food chemistry 2009;57(2):735-45.
2008: Marco Assunção; Maria João Santos-Marques; Victor de Freitas; Manuel M Paula-Barbosa; Félix Carvalho
Modulation of rat cerebellum oxidative status by prolonged red wine consumption.
Addiction biology 2008;13(3-4):337-44.
2008: Angelo Carneiro; Marco Assunção; Victor de Freitas; Manuel M Paula-Barbosa; José Paulo Andrade
Red Wine, but not port wine, protects rat hippocampal dentate gyrus against ethanol-induced neuronal damage--relevance of the sugar content.
Alcohol and alcoholism (Oxford, Oxfordshire) 2008;43(4):408-15.
2008: Cátia Lourenço; Bruno Gago; Rui M Barbosa; Victor de Freitas; João Laranjinha
LDL isolated from plasma-loaded red wine procyanidins resist lipid oxidation and tocopherol depletion.
Journal of agricultural and food chemistry 2008;56(10):3798-804.
2007: Rui Gonçalves; Susana Soares; Nuno Mateus; Victor de Freitas
Inhibition of trypsin by condensed tannins and wine.
Journal of agricultural and food chemistry 2007;55(18):7596-601.
2007: Joana Oliveira; Victor de Freitas; Artur M S Silva; Nuno Mateus
Reaction between hydroxycinnamic acids and anthocyanin-pyruvic acid adducts yielding new portisins.
Journal of agricultural and food chemistry 2007;55(15):6349-56.
2007: Marco Assunção; Maria João Santos-Marques; Victor de Freitas; Félix Carvalho; José Paulo Andrade; Nikolai V Lukoyanov; Manuel M Paula-Barbosa
Red wine antioxidants protect hippocampal neurons against ethanol-induced damage: a biochemical, morphological and behavioral study.
Neuroscience 2007;146(4):1581-92.
2007: Iracema Belinha; Maria Amélia Amorim; Pedro Rodrigues; Victor de Freitas; Pedro Moradas-Ferreira; Nuno Mateus; Vitor Costa
Quercetin increases oxidative stress resistance and longevity in Saccharomyces cerevisiae.
Journal of agricultural and food chemistry 2007;55(6):2446-51.
2007: Marco Assunção; Victor de Freitas; Manuel M Paula-Barbosa
Grape seed flavanols, but not Port wine, prevent ethanol-induced neuronal lipofuscin formation.
Brain research 2007;1129(1):72-80.
2006: Jingren He; Celestino Santos-Buelga; Artur M S Silva; Nuno Mateus; Victor de Freitas
Isolation and structural characterization of new anthocyanin-derived yellow pigments in aged red wines.
Journal of agricultural and food chemistry 2006;54(25):9598-603.
2006: Jingren He; Celestino Santos-Buelga; Nuno Mateus; Victor de Freitas
Isolation and quantification of oligomeric pyranoanthocyanin-flavanol pigments from red wines by combination of column chromatographic techniques.
Journal of chromatography. A 2006;1134(1-2):215-25.
2006: Elisabete Carvalho; Nuno Mateus; Benoit Plet; Isabelle Pianet; Erick J Dufourc; Victor de Freitas
Influence of wine pectic polysaccharides on the interactions between condensed tannins and salivary proteins.
Journal of agricultural and food chemistry 2006;54(23):8936-44.
2006: Joana Oliveira; Virgínia Fernandes; Candida Miranda; Celestino Santos-Buelga; Artur Silva; Victor de Freitas; Nuno Mateus
Color properties of four cyanidin-pyruvic acid adducts.
Journal of agricultural and food chemistry 2006;54(18):6894-903.
2006: Isabelle Tarascou; Karine Barathieu; Cécile Simon; Marie-Agnès Ducasse; Yann André; Eric Fouquet; Erick J Dufourc; Victor de Freitas; Michel Laguerre; Isabelle Pianet
A 3D structural and conformational study of procyanidin dimers in water and hydro-alcoholic media as viewed by NMR and molecular modeling.
Magnetic resonance in chemistry : MRC 2006;44(9):868-80.
2006: Ana Faria; Conceição Calhau; Victor de Freitas; Nuno Mateus
Procyanidins as antioxidants and tumor cell growth modulators.
Journal of agricultural and food chemistry 2006;54(6):2392-7.
2006: Ana Faria; Nuno Mateus; Victor de Freitas; Conceição Calhau
Modulation of MPP+ uptake by procyanidins in Caco-2 cells: involvement of oxidation/reduction reactions.
FEBS letters 2006;580(1):155-60.
2005: Ana Faria; Joana Oliveira; Patrícia Neves; Paula Gameiro; Celestino Santos-Buelga; Victor de Freitas; Nuno Mateus
Antioxidant properties of prepared blueberry (Vaccinium myrtillus) extracts.
Journal of agricultural and food chemistry 2005;53(17):6896-902.
2004: João Pissarra; Sandra Lourenço; Ana M González-Paramás; Nuno Mateus; Celestino Santos-Buelga; Artur M S Silva; Victor de Freitas
Structural characterization of new malvidin 3-glucoside-catechin aryl/alkyl-linked pigments.
Journal of agricultural and food chemistry 2004;52(17):5519-26.
2004: Victor de Freitas; Patrícia da Silva Porto; Marco Assunção; António Cadete-Leite; José Paulo Andrade; Manuel M Paula-Barbosa
Flavonoids from grape seeds prevent increased alcohol-induced neuronal lipofuscin formation.
Alcohol and alcoholism (Oxford, Oxfordshire) 2004;39(4):303-11.
2003: Patrícia Andréia Leite da Silva Porto; João Laranjinha; Victor de Freitas
Antioxidant protection of low density lipoprotein by procyanidins: structure/activity relationships.
Biochemical pharmacology 2003;66(6):947-54.
2003: Nuno Mateus; Artur M S Silva; julian rivas; Celestino Santos-Buelga; Victor de Freitas
A new class of blue anthocyanin-derived pigments isolated from red wines.
Journal of agricultural and food chemistry 2003;51(7):1919-23.
2003: Nuno Mateus; Elisabete Carvalho; Alexandre Carvalho; André Melo; Ana M González-Paramás; Celestino Santos-Buelga; Artur M S Silva; Victor de Freitas
Isolation and structural characterization of new acylated anthocyanin-vinyl-flavanol pigments occurring in aging red wines.
Journal of agricultural and food chemistry 2003;51(1):277-82.
2002: Nuno Mateus; Artur M S Silva; Celestino Santos-Buelga; julian rivas; Victor de Freitas
Identification of anthocyanin-flavanol pigments in red wines by NMR and mass spectrometry.
Journal of agricultural and food chemistry 2002;50(7):2110-6.
2001: Nuno Mateus; Victor de Freitas
Evolution and stability of anthocyanin-derived pigments during Port wine aging.
Journal of agricultural and food chemistry 2001;49(11):5217-22.
2001: Nuno Mateus; Artur M S Silva; Joseph Vercauteren; Victor de Freitas
Occurrence of anthocyanin-derived pigments in red wines.
Journal of agricultural and food chemistry 2001;49(10):4836-40.
2001: Victor de Freitas; Nuno Mateus
Structural features of procyanidin interactions with salivary proteins.
Journal of agricultural and food chemistry 2001;49(2):940-5.
2001: F S Rogerson; H Castro; N Fortunato; Z Azevedo; A Macedo; Victor de Freitas
Chemicals with sweet aroma descriptors found in Portuguese wines from the Douro region: 2,6,6-trimethylcyclohex-2-ene-1,4-dione and diacetyl.
Journal of agricultural and food chemistry 2001;49(1):263-9.
1999: Victor de Freitas; P S Ramalho; Z Azevedo; A Macedo
Identification of some volatile descriptors of the rock-rose-like aroma of fortified red wines from douro demarcated region.
Journal of agricultural and food chemistry 1999;47(10):4327-31.
1999: M Teresa S D Vasconcelos; Manuel Azenha; Victor de Freitas
Role of polyphenols in copper complexation in red wines.
Journal of agricultural and food chemistry 1999;47(7):2791-6.