9 documents found, page 1 of 1

Cork oak and climate change: disentangling drought effects on cork chemical com...

Climate change induces in the Mediterranean region more frequent and extreme events, namely, heat waves and droughts, disturbing forest species and affecting their productivity and product quality. The cork oak (Quercus suber) is present along the western Mediterranean basin and its outer bark (cork) is sustainably collected and used for several products, mainly wine bottle stoppers. Since most cork properties ...

O montado e a cortiça. Livro de Resumos

Transferência de oxigénio para o vinho em garrafas com rolha de cortiça natural

Classification modeling based on surface porosity for the grading of natural co...

tThe natural cork stoppers are commercially graded into quality classes according with the homogeneity of theexternal surface. The underlying criteria for this classification are subjective without quantified criteria and standardsdefined by cork industry or consumers. Image analysis was applied to premium, good and standard quality classes tocharacterize the surface of the cork stoppers and stepwise discrimina...

Livro Verde dos Montados

O Livro Verde dos Montados apresenta diversos objectivos que se interligam: Em primeiro lugar, o Livro Verde pretende reunir e sistematizar, de uma forma simples e acessível ao público, o conhecimento produzido em Portugal pelos investigadores e técnicos de várias instituições de investigação ou de gestão que estudam o Montado. Assume-se como uma oportunidade de caracterizar o sistema tendo em conta as suas vár...

Conhecer as rolhas de cortiça: exterior, interior e permeabilidade ao oxigénio ...

Incork: Avaliação da influência da estrutura interna na transmissão de oxigénio...

A avaliação da qualidade das rolhas de cortiça natural é feita actualmente por uma análise visual da sua superfície exterior utilizando sistemas automáticos de análise de imagem ou operadores. As rolhas de boa qualidade apresentam poucos poros de pequena dimensão, contrariamente às de menor qualidade com muitos poros ou poros de grande dimensão. Verificase, no entanto, que existe uma grande heterogeneidade das ...

The porosity of natural cork stoppers

Natural cork stoppers are the premium product of the cork industry with worldwide recognition of quality and performance as wine sealant. The occurrence of negative evolution of bottled wines has often been attributed to cork stoppers as a result of their intrinsic variability. One of the main characteristics of cork stoppers is their surface porosity which is the determining factor for their commercial quality...

Kinetics of Oxygen Ingress into Wine Bottles Closed with Natural Cork Stoppers ...

The kinetics of oxygen ingress into bottles closed with natural cork stoppers was investigated by a nondestructive colorimetric measurement method using the oxidation of an indigo carmine solution. In order to encompass the natural variability of cork regarding its oxygen ingress into the bottle, 600 natural cork stoppers from different quality classes and produced from cork planks of different calipers were an...