Electrochemical degradation of Mordant Blue 13 azo dye using boron-doped diamond and dimensionally stable anodes: influence of experimental parameters and water matrix.

In this work, the electrooxidation as environmentally clean technology has been studied to the degradation of Mordant Blue 13 azo dye (MB13) using boron-doped diamond (p-Si/BDD) and oxide ruthenium titanium (Ti/RuTiO (DSA)) anodes in various water matrices: distilled water (DW), hot tap water (HTW), and simulated wastewaters with (SWS) and without surfactant (SW). The influence of experimental parameters, such as current density, initial dye concentration, electrolysis time/specific charge, and pH on the MB13 degradation rate, current efficiency, and energy consumption, has been determined. The enhanced rate of both color and chemical oxygen demand (COD) removal in sulfate aqueous solutions with BDD was observed, which indicates that sulfate (SO) radicals along with OH ones might be responsible for the degradation process.

[Effect of vaccination against pneumococcal infection and influenza in children with asthma].

Assessment of clinical course of asthma and IgG response in children with asthma immunized with pneumococcal polysaccharide vaccine (Pneumo 23) and influenza vaccine (Vaxigrip). 78 children aged 4 - 17 years old were allocated to two groups. Children from the 1st group were immunized against pneumococcal infection and influenza; children from 2nd group were immunized against pneumococcal infection only.

5-Nitro-2-nitromethyl-2H-1,2,3,4-tetrazole.

The molecule of the title compound, C(2)H(2)N(6)O(4), consists of three planar fragments, namely a tetrazole ring, a nitromethyl group and a nitro group. The nitro group and the tetrazole cycle are arranged in the same plane, but the planar nitromethyl group is located nearly orthogonal to this plane. The molecules are packed in the crystal via van der Waals interactions.

3-Nitro-1-nitromethyl-1H-1,2,4-triazole.

The title compound, C(3)H(3)N(5)O(4), consists of three planar fragments twisted in relation to each other, namely a triazole ring, a nitromethylene group and a nitro group. Molecular conformation analysis shows that the first stage of thermal decomposition is a breakage of the H(2)C-NO(2) bond. There are essential conformational differences in the molecule in comparison with semi-empirical calculations.