Search results for " TiO"
showing 10 items of 161 documents
Physiological engineering of Pseudomonas aurantiaca antimicrobial activity: effects of sodium chloride treatment
2012
The influence of sodium chloride (NaCl) treatment on the antifungal activity of the bacterium Pseudomonas aurantiaca, a producer of biopesticide for vegetable plants, was investigated. It was shown that an increase in the NaCl concentration in incubation solutions from 1 M to 3 M led to a significant increase in the antifungal activity of this bacterium. Antifungal activity continued to increase with prolonged treatment of bacteria in fresh nutrient medium from 72 h to 96 h. These findings could be very important for the further development of biotechnological processes directed not only to the production of new active biopesticides but also of other valuable resources.
Impacto económico de las rentas mínimas: la Renta Valenciana de Inclusión
2019
Las Comunidades Autónomas son las principales responsables de la política de asistencia social en España. Recientemente, la Comunidad Valenciana ha reformado su sistema de rentas mínimas, instaurando la denominada Renta Valenciana de Inclusión. En el presente trabajo se calcula el impacto económico de este programa partiendo de una estimación ex-ante del gasto público a realizar. La estimación cuantifica el número de beneficiarios y el coste presupuestario de la medida; y compara estos resultados con las restantes Comunidades Autónomas. La Comunidad Valenciana se situaría entre las regiones españolas con mayor tasa de cobertura y con mayor gasto por habitante en este tipo de políticas. En b…
The role of water in the photocatalytic degradation of acetonitrile and toluene in gas-solid and liquid-solid regimes
2006
Photocatalytic degradation of acetonitrile and toluene was carried out both in gas-solid and in liquid-solid regimes by using commercialTiO2samples (Merck and Degussa P25). The investigation was mainly aimed to study the influence of water present in the reaction environment on the mechanism and degradation rate of two probe molecules. In gas-solid regime, the reacting mixture consisted of toluene or acetonitrile, oxygen, nitrogen, and water vapour. The main degradation product of toluene wasCO2with small amounts of benzaldehyde. In the presence of water vapour, the activity ofTiO2Merck remained stable but greatly decreased if water was absent.TiO2Degussa P25 continuously deactivated, even …
TiO2-H2O Interactions by Fast Field Cycling (FFC) NMR Relaxometry
2010
Photocatalytic Properties of Nanostructured TiO2 Powders Obtained by Thermohydrolysis of TiOSO4
2012
TiO2 in Organic Photosynthesis: Sunlight Induced Functionalization of Heterocyclic Bases in the Presence of TiO2
2010
Ossidazione fotocatalitica del glucosio in presenza di TiO2
2014
Ossidazione selettiva di alcoli aromatici ad aldeidi in sospensioni acquose di TiO2 anatasio e rutilo
2008
Mechanistic aspects of oxalic acid oxidation by photocatalysis and ozonation
2008
Oxalic acid has been oxidised in acidic aqueous solutions (pH 3) using photocatalysis and ozonation alone or coupled. The simultaneous presence of ozone, titanium dioxide and near UV irradiation increases the oxidation rate of oxalic acid to values greater than those deriving from the single contributions of photocatalysis and ozonation. In particular in the present paper ozonation alone, heterogeneous photocatalysis and also combined ozonation with heterogeneous photocatalysis have been used for the oxidation of oxalic acid at acidic pH in the presence of TiO2 Degussa P25. A likely mechanism, able to explain both the homogeneous and heterogeneous processes, is discussed.
Stoichiometry-related Auger lineshapes in titanium oxides: Influence of valence-band profile and of Coster-Kronig processes
2004
International audience; The ability to determine the nature and the occurrence of defects is a central need of ceramic surface chemistry. In titanium oxides, the Ti-LMV Auger decays line shape is very sensitive to the titanium degree of oxidation, and has long been empirically used as a qualitative probe of the stoichiometry. In the present work, resonant Auger and resonant valence-band measurements at the Ti-L2,3 edges in TiO2, TiO2–x and metallic titanium provide a clear evidence that the evolutions of the Ti-LMV Auger line shape are due to drastic changes in the valence-band profile and in the probability of L2L3V Coster-Kronig decay processes when a fraction of titanium ions is reduced.…