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Cytotoxicity of portuguese propolis: the proximity of the in vitro doses for tu...

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...

Polymeric biophenols in olive mill wastewaters

Olive mill wastewater (OMW), the effluents generated in the olive oil extraction industry operating in three-phases mode, are phytotoxic mainly due to its high phenolic content [1]. On the other hand, attending to the potential healthbenefits of some of their phenolic compounds, OMW are now regarded as a potent source of biophenols for food and pharmaceutical industries. An important portion of the OMW biopheno...

Insights into olive mill wastewaters phenolic compounds

Olive mill wastewaters (OMW) have high contents of phenolic compounds, which possess a wide range of biological activities. Therefore, OMW are regarded as a potent source of biophenols for food and pharmaceutical industries. Important biophenols occurring in OMW include tyrosol, oleuropein and hydroxytyrosol, with the latter being commercially exploited as a novel ingredient with a broad use in dietary suppleme...

Polymeric biophenols in olive mill wastewaters

Valorização das águas ruças – Identificação de compostos antioxidantes

Neste trabalho pretendeu-se determinar a composição em compostos fenólicos de amostras de efluentes líquidos provenientes de diferentes lagares de azeite do Norte de Portugal (Amarante, Mirandela, Castelo Rodrigo e Frieira). Para tal, as águas ruças foram extraídas com acetato de etilo, o extracto foi fraccionado por HPLC e as fracções foram analisadas por espectrometria de massa (ESI-MS e ESI-MSn). Este proced...

New biophenols in olive mill wastewaters

Olive mill wastewaters (OMW) have been attracting the attention of food and pharmaceutical industries, as it is a potential source of biophenols with a wide range of biological activities. This effluent produced in the olive oil industry contains approximately half of the total phenolic compounds of the olive fruit and it is currently exploited for industrial extraction of hydroxytyrosol [1]. Still, the phenoli...

New biophenols in olive mill wastewaters

Olive mill wastewaters (OMW) have been attracting the attention of food and pharmaceutical industries, as it is a potential source of biophenols with a wide range of biological activities. This effluent produced in the olive oil industry contains approximately half of the total phenolic compounds of the olive fruit and it is currently exploited for industrial extraction of hydroxytyrosol [1]. Still, the phenoli...

Phenolic characterization of Northeast Portuguese propolis: usual and unusual c...

http://apps.isiknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=36&SID=U1e@I68fCCb5AFc@On4&page=1&doc=1&colname=WOS ; In this study, an ethanolic extract from Portuguese propolis was prepared, fractionated by highperformance liquid chromatography, and the identification of the phenolic compounds was done by electrospray mass spectrometry in the negative mode. This technical approach allowe...

Screening of portuguese propolis and its plant sources for inhibitory activity ...

Propolis is a beehive product with a very complex chemical composition, widely used in folk medicine because of its several therapeutic activities. Its biological properties and chemical composition may vary according to the geografic location and to the different plant sources. Recently, we reported the mechanism for extration and propolis sample preparation (Falca˜o et al, Anal. Bioanal. Chem., 2010, 396: 887...

Is Portugal a country of propolis diversity?

Portugal geographical situation and therefore their floral diversity points towards the existence of typical propolis from temperate zones, where bud exudates of poplar trees (Populus species) are the main source of this honeybee product With the exception of Madeira and Azores Islands, where the floral diversity could present significant differ· ences, it would be expected to find a product rich in flavonoid a...