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Colour profile analysis of Port Wines by different instrumental and visual methods

Soares-da-Silva, Francisco A. G.; Campos, Francisco M.; Ferreira, Manuel L.; Ribeiro, Natália; Amaral, Bento; Simões, Tomás; Silva, Cristina L. M.

BACKGROUND: Wine colour is an important quality parameter, being the first sensorial attribute evaluated during wine tasting. The perception of wine colour can be different depending on many factors, including the depth of the sample under observation. The main objectives of the present study were to measure the colour of Port wines, using CIE L*a*b* parameters at different depths with different instrumental te...


Meningoencephalocele causing recurrent meningitis

Ruas, Rogerio; Ribeiro, Natália

Patients with recurrent meningitis must be carefully studied to exclude risk factors including anatomic defects.




Staff and Contributors

Freitas, Átila; Dornelas, Isabela de Oliveira; Reis, Marcus; Carvalho, Marina Helena Meira; Ribeiro, Natália; Resende, Pedro; Prates, Thiago

Date: 2017   |   Origin: Oasisbr

Colour assessment of Port wines using colourimetric and spectrophotometric methods

Silva, Francisco A. G. Soares; Campos, Francisco M.; Ferreira, Manuel L.; Ribeiro, Natália; Amaral, Bento; Simões, Tomás; Silva, Cristina L. M.

Colour is an important quality parameter in wines and is the result of a complex mixture of pigments (including anthocyanins and their derivatives, quinones, xanthyllium compounds, etc.). Red wine colour changes over time, as pigments react between themselves and with other wine macromolecules (particularly polyphenols) [1]. During wine tasting, colour is normally assessed on the outer rim of the wine profile i...


Desenvolvimento e validação de um método para a análise de conservantes em vinh...

Vieira, Tatiana F.; Simões, T.; Ribeiro, Natália; Oliveira, Ana; Bettencourt, Ana Paula


Sistema de vigilância de morbilidade pediátrica no Hospital Geral do Bengo

Oliveira, Ana; Gasparinho, Carolina; Mayer, António Carlos; Ribeiro, Natália; Brito, Miguel

Angola tem registado avanços significativos na redução da mortalidade infantil. Não obstante, verifica-se ainda a necessidade de implementar novas medidas no sentido de reduzir a morbimortalidade infantil. Para atingir este objectivo foi implementado um Sistema de Vigilância de Morbilidade (SVM) no serviço de Pediatria do Hospital Geral do Bengo (HGB). O objectivo deste trabalho é a identificação das doenças ma...


Analysis of six fungicides and one acaricide in still and fortified wines using...

Martins, Joana; Esteves, Cristina; Limpo-Faria, Ana; Barros, Paulo; Ribeiro, Natália; Simões, Tomás; Correia, Manuela; Delerue-Matos, Cristina

A multiresidue gas chromatographic method for the determination of six fungicides (captan, chlorthalonil, folpet, iprodione, procymidone and vinclozolin) and one acaricide (dicofol) in still and fortified wines was developed. Solid-phase microextraction (SPME) was chosen for the extraction of the compounds from the studied matrices and tandem mass spectrometry (MS/MS) detection was used. The extraction consists...


Multiresidue method for the determination of organophosphorus pesticides in sti...

Martins, Joana; Esteves, Cristina; Limpo-Faria, Ana; Barros, Paulo; Ribeiro, Natália; Simões, Tomás; Correia, Manuela; Delerue-Matos, Cristina

A SPME-GC-MS/MS method for the determination of eight organophosphorus pesticides (azinphos-methyl, chlorpyriphos, chlorpyriphos-methyl, diazinon, fenitrothion, fenthion, malathion, and methidathion) in still and fortified wine was developed. The extraction procedure is simple, solvent free, and without any sample pretreatment. Limits of detection (LOD) and quantitation (LOQ) values in the range 0.1–14.3 lg/L a...


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