The potential bioactivity of dietary and medicinal endemic Helichrysum plants from Madeira Archipelago was explored, for the first time, in order to supply new information for the general consumer. In vitro antioxidant properties were investigated using DPPH, ABTS(•+), FRAP and β-Carotene assays, and the total phenolic content (TPC) and total flavonoid content (TFC) were also determined. Althou...

An extracellular alpha-type carbonic anhydrase (dCAII) from the salt-tolerant alga Dunaliella salina differs from its mesophilic counterparts in remaining active from zero to multimolar salt concentrations. To gain insight into the outstanding salt tolerance of dCAII, the enzyme was functionally overexpressed in Escherichia coli, purified by affinity chromatography and crystallized by the hangi...

Red betel (Piper crocatum) is a plant that often used as medicine. belongs to the Piperaceae family, grows vines with heart-shaped leaves and stems, which grow alternately from stem appearance of are silvery red shiny when exposed sunlight. contains flavonoid compounds, alkaloids, tannins, phenolic compounds essential oils. The results showed ethanol extract leaf active such flavonoids phenolic...

Four new indolediketopiperazine derivatives (1-4), along with nine known congeners (5-13), were isolated and identified from the culture extract of Eurotium cristatum EN-220, an endophytic fungus obtained from the marine alga Sargassum thunbergii. The structures of thesecompounds were elucidated on the basis of extensive spectroscopic analysis and the absolute configurations of compounds 1-4 we...

Carotenoid content of microalga, Dunaliella salina was increased using different stress parameters, such as cell division inhibition (vinblastine), nitrogen starvation, high salinity and high irradiation with high temperature. Vinblastine had very little favourable effect. Salinity above 3 M significantly decreased the cell growth rate due to cell death but increased the per cell carotenoid con...