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3 results for “dimethylhydrazine”
Degradation of gaseous unsymmetrical dimethylhydrazine by vacuum ultraviolet coupled with MnO2
<p>In this study, α-, β-, and δ-MnO<sub>2</sub> were prepared by a uniform hydrothermal method and then coupled with vacuum ultraviolet (VUV) for the degradation of gaseous unsymmetrical dimethylhydrazine (UDMH). The performance in the remove of UDMH, by-products distribution and mechanistic insights were systematically investigated. The catalysts were characterized by X-ray diffraction (XRD), N<sub>2</sub> adsorption/desorption, Field Emission Scanning Electron Microscopy (FE-SEM), Raman, thermal gravimetric (TG), X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared (FTIR) to investigate the factors affecting the catalytic activity. The results showed that O<sub>2</sub> and H<sub>2</sub>O were essential for the remove of UDMH . The integrated process considerably improved the remove and mineralization of UDMH by ozone catalytic oxidation . There were more reactive oxygen species generated in the integrated process. The catalytic activity of the prepared catalysts following the order: δ-MnO<sub>2</sub> >α-MnO<sub>2</sub> >β-MnO<sub>2</sub>. δ-MnO<sub>2</sub> displayed the highest remove rate of 100% and CO<sub>2 </sub>concentration of 42 ppmv. The good performance of δ-MnO<sub>2</sub> was attributed to high specific surface area and surface oxygen vacancies.</p>
Degradation of gaseous unsymmetrical dimethylhydrazine by vacuum ultraviolet coupled with MnO2
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A diet enriched with biologically active substances as a protecting factor against carcinogenesis process induced by 1,2-dimethylhydrazine in rat liver
GEO Series GSE55378. Rattus norvegicus. 12 samples. Type: Expression profiling by array.
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