With a complex chemical composition rich in phenolic compounds, propolis (resinous substance collected by Apis mellifera from various tree buds) exhibits a broad spectrum of biological activities. Recently, in vitro and in vivo data suggest that propolis has anticancer properties, but is the cytoxicity of propolis specific for tumor cells? To answer this question, the cytotoxicity of phenolic extracts from Port...
The antioxidant activity of the aminodi(hetero)arylamines, prepared by C-N coupling of the methyl 3-aminothieno[3,2-b]pyridine-2-carboxylate with bromonitrobenzenes and further reduction of the obtained nitro compounds, was evaluated by chemical, biochemical and electrochemical assays. The aminodi(hetero) arylamine with the amino group ortho to the NH and a methoxy group in para, was the most efficient in radic...
Health benefits including antioxidant potential of black tea (Camellia sinensis), lemon (Citrus limon) and honey bees (Apis mellifera) have been extensively reported. Nevertheless, nothing is reported about the effects of their concomitant use. Herein, those effects were evaluated in infusions of lemon-flavoured black tea with three different kinds of honey (light amber, amber and dark amber) from Lavandula sto...
The reducing properties of diarylamines make them very important as antioxidants, especially as radical scavengers as it has been demonstrated by our and other research groups [1 -3]. Three di(hetero)arylamines were prepared by C- N coupling of the methyl3-amino-6-bromothieno(3,2- b]pyridine-2-carboxylate with bromonitrobenzenes and further reduced to the amino compounds 1a-c (Scheme) (4].
A apicultura é uma atividade importante, considerada estratégia para o desenvolvimento sustentável do território pela notável ação que desempenha no mundo rural e no meio ambiente. É uma atividade conservadora, de fácil manutenção, de baixo custo inicial em relação às demais atividades agropecuárias, e uma das poucas no ramo da agropecuária que preenche os requisitos base da sustentabilidade: (a) o económico, p...
The Portuguese beekeeping sector is one of the most resilient and persistent farming activities in the last decade. In the last five years, the figures reveal a counter cycle behavior with an increment in the number of colonies, apiaries and beekeepers, as shown in the National Beekeeping Program: there are 16.403 beekeepers with a total of 550.757 colonies. Following the same positive trend, the conversion fro...
Em Portugal, segundo dados oficiais de 2010 da Direção Geral de Alimentação e Veterinária, a apicultura em Portugal é realizada por 17.291 apicultores com um total de 562.557 colonias. Estes números incluem um número reduzido de 119 operadores registados no modo de produção biológico, com um total de 15.927 colonias. A atividade apícola em modo de produção biológico em Portugal esta assim muito abaixo de outros...
A apicultura é uma atividade importante, considerada estratégia para o desenvolvimento sustentável do território pela notável ação que desempenha no mundo rural e no meio ambiente. É uma atividade conservadora, de fácil manutenção, de baixo custo inicial em relação às demais atividades agropecuárias, e uma das poucas no ramo da agropecuária que preenche os requisitos base da sustentabilidade: (a) o económico, p...
In Portugal, according to the official data provided by the Portuguese Veterinary Authority), available in the Report of the National Beekeeping Program 2010, beekeeping is carried out by 17.291 beekeepers, which own a total of 562.557 colonies. According to the Research Institute of Organic Agriculture (FiBL) this represents only 3,6% of the economic value of the Portuguese organic production, given that only ...
Honey plays an important role in human health by combating damage caused by oxidizing agents, namely reducing the risk of heart disease, cancer, immune-system decline, cataracts, and inflammatory processes, among others. The antioxidant activity of honey has been extensively reported and attributed to the anti oxidants present that include both enzymatic and non-enzymatic substances (Ferreira et al., 2009). The...
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