Flavonoid constituents and cytotoxic activity of Erucaria hispanica (L.) Druce growing wild in Egypt

Thirteen flavonoid compounds were isolated for the first time from the aerial parts of Erucaria hispanica (L.) Druce growing in Egypt. Their structures were established on the basis of detailed chromatographic and spectroscopic techniques (UV, 1D and 2D NMR and ESIMS). The cytotoxic activity of the methanol extract as well as some isolated compounds against four human carcinoma cell lines; breast (MCF7), liver (HEPG2), cervix (HELA) and colon (HCT116) were evaluated

Coronal structure and flattening during total solar eclipse 2006

On the basis of well resolved observations of the solar corona taken at Salloum N-W of Egypt during the total solar eclipse of 2006 “the descending phase of solar cycle 23”, some aspects of the physics of the corona have been studied up to several solar radii. The magnetic structures of the white light corona were studied. The flattening coefficient e characterizes the shape of the isophotes of the whit-light corona and computed as a function of the distance from the disk center. The flattening index e during solar total eclipse 2006 was found to be 0.158. This result is in a good agreement with previous published results