Pico Island is one of the islands of the Azores archipelago located in the North Atlantic Ocean, where there are very specific conditions for vine cultivation. In this context, there is scarce knowledge related to grape ripening under these conditions. Thus, the aim of this study was to evaluate several physicochemical parameters, the phenolic composition, antioxidant capacity, and varietal aromatic potential, ...
‘Kadarka’ (Vitis vinifera L.) is a red grape variety considered native for the countries on the lower reaches of the Danube River (east of Europe). However, there is very limited knowledge about the evolution of the wines produced from this variety during aging in contact with oak wood. Thus, the aim of this work was to investigate under laboratory conditions the changes in phenolic, volatile, and sensory profi...
In the last few years, the production and consumption of craft beers has increased notably. However, there is restricted knowledge about the potential impact of chips from different wood species on beer quality. Thus, this work aimed to evaluate the effect of the addition of wood chips from cherry and oak species—after the fermentation was completed and during a brief maceration time—on the volatile composition...
The use of untoasted woods was not previously considered for white wine aging. Thus, this work focuses on the comparative analysis of phenolic composition, wood volatile compounds and sensory characteristics of a white wine stored for 20 days in contact with untoasted woods from oak (Quercus petraea and Quercus pyrenaica) acacia (Robinia pseudoacacia), and chestnut (Castanea sativa). The outcomes obtained demon...
Background: Eggplant is an important crop, being cultivated and consumed in many countries. However, like other vegetables, is highly perishable and has a short shelf life. Objective: The objective of this study was to evaluate the effect of hot air drying on some physical, chemical and sensorial properties of eggplant. Methods: Eggplant samples were dried in convective chambers at constant temperatures of 50, ...
In the last years, there has been an increase in consumption of wine vinegars in Portugal. Thus, the aim of this work was to evaluate the phenolic composition and total antioxidant capacity from several commercial red wine vinegars commercialized in Portuguese market. Several parameters were evaluated: general phenolic composition, chromatic characteristics, individual anthocyanins and phenolic acids by HPLC, a...
The present study aimed at studying the effect of convective air drying on some physical, chemical and sensory properties of kiwi (Actinidia deliciosa L.) samples. The kiwi samples were dried in thin layer convective chambers set to constant temperatures at 50ºC, 60ºC, 70ºC and 80ºC. The fresh samples and the dried samples were analysed for moisture, water activity, vitamin C, total phenolic compounds, antioxid...
Drying is the oldest method for food preservation, which people learned from nature, and has been using since ancient times. In Turkey, for example, eggplants are dried in the sun hung up with a string. Although it is a very economic method, it has many disadvantages and has been replaced by other drying methods, like hot air drying. This work intended to analyse the differences originated by drying in eggplant...