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Phenolic composition and antioxidant potential of Vitis vinífera leaves of six ...
Ramalhosa, Elsa; Valentão, P.; Andrade, P.B.; Andrade, João Verdial; Bento, Albino; Pereira, J.A.In the present work it was intended to study the phenolic composition and antioxidant potential of Vitis vinifera leaves of six varieties: white – Carrega Branco, Chardonnay and Viosinho, and red – Bastardo, Tinta Gorda and Touriga Francesa. All varieties were harvested in the NE of Portugal (Trás-os-Montes region). The phenolic composition of aqueous extracts was determined by HPLC-DAD and the antioxidant pote...
Exploring argentine homey and propolis
Rios, F.; Andrade, P. B.; Valentão, P.; Duarte,Torres; Samman, N.; Silva, L. R.[Abstract] ; [Resumo]
Metabolite profiling of wild edible mushrooms species
Valentão, P.; Ribeiro, Bárbara; Pinho, P. Guedes de; Baptista, Paula; Andrade, P.B.Mushrooms are of increasing importance in modern nutrition and medicine. Trás-os-Montes region (north-eastern Portugal) is known for the variety of its soils and diversity of climate conditions. This variability assumes an important role in mushroom production, explaining why this region is recognized as one of the richest ones in wild edible species. A metabolomics approach was applied to twelve wild edible mu...
Phenolics: from chemistry to biology
Pereira, D.M.; Valentão, P.; Pereira, J.A.; Andrade, P.B.In recent years, few classes of natural products have received as much attention as phenolics and polyphenols. This special issue of Molecules, “Phenolics and Polyphenolics”, is a remarkable confirmation of this trend. Several aspects related to phenolics chemistry, comprising the several classes, will be discussed. In addition, the increasing interest in phenolics’ biological activities is covered, and several...
Fatty acid composition of wild edible mushrooms species: a comparative study
Ribeiro, Bárbara; Pinho, P. Guedes de; Andrade, P.B.; Baptista, Paula; Valentão, P.A comparative study was developed on the total fatty acids composition of twelve wild edible mushroom species (Suillus bellini, Suillus luteus, Suillus granulatus, Hygrophorus agathosmus, Amanita rubescens, Russula cyanoxantha, Boletus edulis, Tricholoma equestre, Fistulina hepatica, Cantharellus cibarius, Amanita caesarea and Hydnum rufescens). In order to define qualitative and quantitative profiles, combined...
Volatile constituents throughout Brassica oleracea L. var. acephala germination.
Fernandes, F.; Gomes, D.; Pinho, P. Guedes de; Valentão, P.; Pereira, J.A.; Andrade, P.B.Brassicaceae family are commonly grown and consumed worldwide. Belonging to this group, kale (Brassica oleraceIJe var. acephala) is important in traditional farming systems in the Iberian Peninsula. While its seeds have been used for human consumption as oil, or mixed with some food products, sprouts, the germination form, are favoured for their nutritional value [1].
Pieris brassicae excrements: cytological effects
Fernandes, F.; Teixeira, J.P.; Taveira, M.; Sousa, C.; Costa, S.; Coelho, P.; Valentão, P.; Remião, F.; Pereira, J.A.; Andrade, P.B.Attention has been focused on identifying naturally occurring compounds with anticarcinogenic activity. Epidemiological data evidence the protective role of Brassica species, especially due to their phenolics and glucosinolates. Pieris brassicae, an insect whose larvae constitutes a frequent pest of Brassica species, has the capacity to uptake, metabolize and excrete these phytochemicals by the faeces. Phenolic...
A lagarta da couve, Pieris brassicae (L.) (Lepidoptera: Pieridae), como fonte d...
Fernandes, F.; Malheiro, R.; Andrade, P.B.; Valentão, P.; Bento, Albino; Pereira, J.A.A lagarta da couve, Pieris brassicae (L.), é uma praga que ataca com frequência diferentes espécies de Brassica. Nos estádios de desenvolvimento mais avançados, esta lagarta apresenta uma forte voracidade, consumindo grande quantidade de alimento e produzindo quantidade apreciável de excrementos. Nos últimos anos a procura de novas moléculas com interesse farmacêutico tem tido grande impulso, constituindo os pr...
Systemic release of volatiles by Brassica oleracea var. acephala induced by Pie...
Fernandes, F.; Pereira, D.M.; Pinho, P. Guedes de; Valentão, P.; Oliveira, Ivo; Pereira, J.A.; Andrade, P.B.Pieris brassicae is a specialist on crucifers and its interactions with some of its host plants have been increasingly studied given their importance in pest management, chemical ecology and entomology. Plants are known to respond to insect attack by releasing volatiles that can either warn neighbour plants to the presence of a predator or attract insect parasitoids, thus reducing the attack efficiency. The inf...
In vivo Skin Irritation Potential of a Castanea sativa (Chestnut) Leaf Extract,...
Almeida, IF; Valentão, P; Andrade, PB; Seabra, RM; Pereira, TM; Amaral, MH; Costa, PC; Bahia, MFTopical application of natural antioxidants has proven to be effective in protecting the skin against ultraviolet-mediated oxidative damage and provides a straightforward way to strengthen the endogenous protection system. However, natural products can provoke skin adverse effects, such as allergic and irritant contact dermatitis. Skin irritation potential of Castanea sativa leaf ethanol:water (7:3) extract was...
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