NEW INSIGHT INTO THE MIDDLE EOCENE CALCAREOUS NANNOPLANKTON BIOSTRATIGRAPHY AND PALEOENVIRONMENT FROM FAYOUM AND BENI SUEF AREAS, EGYPT

The present study deals with calcareous nannoplankton paleoenvironmental and biostratigraphic implications as well as the genesis and the stratigraphic significance of an event bed recognized from the middle Eocene Beni Suef Formation in the sections of Gebel Na’alun (Fayoum area) and Gebel Homret Shaibun (Beni Suef area), Egypt. Calcareous nannoplankton biostratigraphy indicates that the Beni Suef Formation in the two areas is synchronous, covering an interval that may be correlated with the calcareous nannoplankton Zone NP17. Paleoenvironmental implications from calcareous nannoplankton suggests deposition of sediments in the Beni Suef Formation under relatively stable, temperate and mesotrophic conditions, with a short interval of eutrophication in the basal part of the Homret Shaibun section

Structural, antioxidant, antiproliferative and in‒silico study of pyridine-based hydrazonyl‒selenazoles and their sulphur isosteres

To evaluate the impact of chalcogen atom type, we performed a comparative study of antioxidant capacity and antiproliferative activity of a focused library of three pyridine-based hydrazonyl-1,3-selenazoles and their sulfur isosteres in five antioxidant assays and in six human solid tumor cell lines, respectively. In-silico calculations were further used to check pharmacokinetic profiles of investigated compounds such as drug-likeness parameters and interaction with water. Generally, selenium compounds appear to be more potent in comparison to sulfur isosteres in the performed essays