The concentrations of some heavy metals (Cu, Co, and Pb) were investigated in muscle, liver and gills of three fish species (Mullus surmuletus, Seriola dumerili, and Sparus aurata) collected from frozen fish markets in ...

The spinels of AB2O4 type display very interesting catalytic properties and have been shown to possess potential industrial applications . Especially spinels have been shown to be selective and active catalysts .Nano ZnFe2O4 ...

Let G be a connected graph with vertex and edge sets V (G) and E(G), respectively. The first Zagreb index M1(G) was originally defined as the sum of the squares of the degrees of all vertices of G. Recently, we know a new ...