Introduction: as a consequence of the social isolation associated with COVID-19, depression and anxiety are two of the most frequent affective disorders in the elderly. Objective: To determine the relationship between depression and anxiety with social isolation in older adults in a first level care clinic. Material and methods: An observational descriptive cross-sectional study was carried out in patients 65 years and older, of both sexes, in social isolation due to confinement. A validated questionnaire was applied for the diagnosis of anxiety and depression, as well as another with questions about social isolation and sociodemographic variables. The Mann-Whitney and Kruskall Wallis U statistical tests were used, with a significance level of 0.05. SPSS program. Version 26. Results: 286 older adults were included, with an average age of 70.6 years, 54.2 % belonged to the female sex. Reg...

ZnO nanorods (NRs) films, nitrogen-doped (ZnO:N), and ZnO doped with nitrogen and decorated with silver nanostructures (ZnO:N-Ag) NRs films were vertically supported on undoped and N doped ZnO seed layers by a wet chemical method. The obtained films were characterized structurally by X-ray diffraction. Morphological and elemental analysis was performed by scanning electron microscopy, including an energy dispersive X-ray spectroscopy facility and their optical properties by Ultraviolet-Visible Spectroscopy. Analysis performed in the NRs films showed that the nitrogen content in the seed layer strongly affected their structure and morphology. The mean diameter of ZnO NRs ranged from 70 to 190 nm. As the nitrogen content in the seed layer increased, the mean diameter of ZnO:N NRs increased from 132 to 250 nm and the diameter dispersion decreased. This diameter increase occurs simultaneousl...

A novel methodology was employed to prepare new nanocomposites with photocatalytic properties based on Ce-doped TiO2 nanoparticles arranged over a layered silicate. The catalysts were porous materials formed by exfoliated silicate layers surrounded by anatase nanoparticles. In this way, the anatase was doped by different amounts of Ce, yielding to catalysts with light absorption properties on the visible region. The photocatalytic behavior was tested for different reactions: adsorption and photocatalysis, showing outstanding and promising results for the removal of bacteria by using solar light as an energy source. The influence of the physicochemical properties of the catalyst and the reaction parameters will be studied in detail to manage new catalysts for the disinfection of drinking water.