Carbamazepine is one of the hydrophilic compounds identified in aquatic environments. Due to toxicity and bio-stability of this psychotropic pharmaceutical in the environment and humans, its removal efficiency and mineralization are important. In this study, synthesized Fe@Fe2O3 nanowires were applied to improve Fenton oxidation process using FeCl3.6H2</sub...

(1) ∂X ∂t − ν∆X + (f · ∇)X + (X · ∇)g = ∇p in (0,∞)×O, ∇ ·X = 0 in (0,∞)×O, X(0, ξ) = x(t), ξ ∈ O, X = 0 on (0,∞)× ∂O. Here, O is an open and bounded subset of R, d = 2, 3, with smooth boundary ∂O and f, g ∈ C2(O;Rd) are given functions. In the special case g ≡ 0, system (1) describes the dynamic of a fluid Stokes flow with partial inclusion of convection acceleration (f ·∇)X (X is the velocity...

For the ring of differential operators D(O(X)) on a smooth affine algebraic variety X over a perfect field of characteristic p > 0, a set of algebra generators and a set of defining relations are found explicitly. A finite set of generators and a finite set of defining relations are given explicitly for the module DerK(O(X)) of derivations on the algebra O(X) of regular functions on the variety...

Let s(x) denote the maximum number of non-overlapping unit squares which can be packed into a large square of side length x. Let W (x) = x − s(x) denote the “wasted” area, i.e., the area not covered by the unit squares. In this note we prove that W (x) = O ( x √ 2)/7 log x ) . This improves earlier results of Erdős-Graham and Montgomery in which the upper bounds of W (x) = O(x) and W (x) = O(x(...

   TiO2 based nanocomposites (NCs) were synthesized using the co-precipitation/hydrolysis (CPH) method. The composition of the first set (TZF) and the second set (TY) of NCs were: TiO2.[ZnFe2O4]x (with x = 0.1 to 0.5), and TiO2.[Y2O3]x (with x = 0.1 to 0.5), respectively. NCs with average crys...

Fe3O4 nanoparticles were synthesizedviaa simple chemical reaction between FeCl2.4H2O and Fe(NO3)3.9H2O under nitrogen atmosphere at room temperature, and then nanoparticles were added to cellulose acetate (CA) polymer. The influence of nanoparticles on the thermal properties of CA polymeric matrix was studied using the...

The new complex of [H2en][Cu(pydc)2].2H2O (1) (where H2en and pydc are ethylenediammonium and 2,6-pyridinedicarboxylate, respectively) was synthesized by the reaction of a mixture of ethylenediamine (en) and 2,6-pyridinedicarboxylic acid (H2pydc) in a mixture of CH3OH/H2O as solvent. This complex was fully characterized by elemental analysis, IR, UV–Vis spectroscopy as well as single-crystal X-...

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