Competition and fouling defence are important traits that may facilitate invasions by non-indigenous species. The 'novel weapons hypothesis' (NWH) predicts that the invasive success of exotic species is closely linked to the possession of chemical defence compounds that the recipient community in the new range is not adapted to. In order to assess whether chemical defence traits contribute to i...

BACKGROUND AND OBJECTIVES Antitumor drug resistance and side effects of antitumor compounds are the most common problems in medicine. Therefore, finding new antitumor agents with low side effects could be interesting. This study was designed to assay antitumor activity of the extract from brown alga Sargassum oligocystum, gathered from Persian Gulf seashore, against K562 and Daudi human cancer ...

Gracilariopsis persica is one of the most abundant red algae distributed in Persian Gulf, despite increasing use in medicine as a major source for natural biomaterials and bioactive compounds in recent years, the researches on growth parameters of this alga remains limited. The main aim of this research was to study the favorable conditions for G. persica growth. Also it was to find the suitabl...

We report on the MOCVD growth of smooth (010) (AlxGa1–x)2O3 and (100) (AlyGa1–y)2O3 epitaxial films β-Ga2O3 substrates with orientations, respectively, using N2O for oxidation. High resolution x-ray diffraction was used to evaluate phase purity strain characteristics (AlGa)2O3 layers estimate Al composition. The incorporation efficiency into depends process conditions, including chamber pressur...

Studies of the biogenesis of the photosynthetic protein complexes in the unicellular green alga

High-resolution images of chloroplast structure in the alga Chlamydomonas offer new insights into photosynthesis.

Na+/H+ exchange activity in whole cells of the halotolerant alga DunaIfeila saUna can be elicited by intracellular acidification due to addition of weak acids at appropriate external pH. The changes in both intracellular pH and Nat were followed. Following a mild intracellular acidification, intracellular Nat content increased dramatically and then decreased. We interpret the phase of Nat influ...

Sustained H 2 photoproduction by green alga Chlamydomonas reinhardtii is achieved under pulse-illumination superimposed on continuous low background light. Pulse-illuminated algae act as biocatalysts producing via direct water biophotolysis.

Purification of a soluble cytochrome c6 from the unicellular green alga Scenedesmus obliquus by a simple and rapid method is described. The purification procedure includes ammonium sulfate precipitation and non-denaturating PAGE. The N-terminal sequence of the first 20 amino acids was determined and shows 85% similarity and 75% identity to the sequence of cytochrome c6 from the green alga Monor...