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Protein haze formation in wines revisited. The stabilising effect of organic acids

The effect on the wine protein haze potential of five organic acids commonly encountered in wines (L(+)- tartaric, L( )-malic, citric, succinic and gluconic acids) was assessed. All five acids, tested at 20 mM, reduced dramatically the haze potential of proteins, either in wine or dissolved in water, throughout the range of pH values typical of wines (i.e., from 2.8 through 3.8). Subtle differences among the ac...

Infecções Respiratórias por Influenza: Reflexões para a ausência de um diagnóstico

RESUMO Introdução: O vírus influenza afecta anualmente 10 a 40% das crianças e destas 0,5 a 1% vão necessitar de internamento. Ao averiguar a prevalência desta infecção no internamento do Hospital Dona Estefânia, entre Janeiro de 2004 e Junho de 2006, constatámos a existência de apenas nove casos diagnosticados. Objectivos: Determinar as causas da escassez do número de diagnósticos de infecções pelo vírus influ...

Ascomycetous yeast species recovered from grapes damaged by honeydew and sour rot

Aims: To identify ascomycetous yeasts recovered from sound and damaged grapes by the presence of honeydew or sour rot. Methods and Results: In sound grapes, the mean yeast counts ranged from 3Æ20 ± 1Æ04 log CFU g)1 to 5Æ87 ± 0Æ64 log CFU g)1. In honeydew grapes, the mean counts ranged from 3Æ88 ± 0Æ80 log CFU g)1 to 6Æ64 ± 0Æ77 log CFU g)1. In sour rot grapes counts varied between 6Æ34 ± 1Æ03 and 7Æ68 ± 0Æ38 lo...

In Vitro Methods for Specific IgE Detection on Cow’s Milk Allergy

Background: A new method for determining serum specific IgE (IMMULITE“ 2000 3gAllergy) has recently become available. Objective: To evaluate the clinical performance of IMMULITE 2000 in the diagnosis of cow’s milk allergy compared with that of UniCAP“. Additionally, we verified the behavior of both methods at two diagnostic decision points proposed by other authors. Methods: The study population consisted of 31...

Prevalência e Factores de Risco para Síndrome Látex-Frutos em Doentes com Alerg...

A associação de alergia ao látex e alergia alimentar a frutos e outros vegetais com reactividade cruzada com látex é denominada síndrome látex-frutos (SLF). Não existem estudos que avaliem factores de risco para SLF em doentes alérgicos ao látex, nomeadamente incluindo diferentes grupos populacionais de risco. Objectivo: Investigar a prevalência e factores de risco para SLF. Material e Métodos: Foram estudados ...

Avaliação do Desempenho do Teste de Rastreio de Alergia Alimentar FP5® (DPC-Ame...

Introdução: A utilização dos testes de rastreio para detecção de IgE específica sérica para diversos alergénios tem sido discutida, sendo invariavelmente aceite a sua utilidade no que diz respeito aos aeroalergénios, não tendo sido ainda suficientemente estabelecida a eficiência dos testes correspondentes destinados à detecção de alergénios alimentares, como acontece com o FP5® da Diagnostic Products Corporatio...

Cold Urticaria and Infectious Mononucleosis in Children

Physical urticaria includes a heterogeneous group of disorders characterized by the development of urticarial lesions and/or angioedema after exposure to certain physical stimuli. The authors present the case of a child with severe acquired cold urticaria secondary to infectious mononucleosis. Avoidance of exposure to cold was recommended; prophylactic treatment with ketotifen and cetirizine was begun and a sel...

Wine instability. I. The importance of the wine proteins

The present work consisted in the removal of protein from six Portuguese varietal wines (Fernão Pires, Assario, Tamarez, verdelho, Arinto and Moscatel)by bentonite fining and subsequent haze induction using the back-addition technique of the total protein from Fernão Pires wine.

Wine instability. II. The influence of several non-proteic components

In the present work the effects on wine protein instability of wine polysaccharides, proteins of non-wine origin and alcohol were investigated.