Promoción y prevención de la salud en la comunidad de San José del Boquerón, Santiago del Estero y puestos aledaños

En base a los datos obtenidos y experiencias vividas en los proyectos previos y vislumbrando las necesidades del grupo meta, considerando a la Salud como un Derecho Humano y fundamentándose en los objetivos de Desarrollo Sostenible del Programa de las Naciones Unidas para el Desarrollo Sostenible, se propone la realización de una intervención de Salud en las comunidades de San José del Boquerón y Piruaj Bajo, en el noroeste de Santiago del Estero. La presencia de múltiples patologías, de diverso orden y características en dichas comunidades, azotadas no sólo por la extrema pobreza e incomunicación, sino por patologías físicas, ambientales, sociales y de cualquier índole, llevan a la realización de este proyecto y motivan al mismo. Dentro de los Análisis de Situación de Salud realizados por estudiantes de medicina en 2018, en la población meta, se observó una prevalencia de enfermedades y situaciones a considerar: HACRE, emponzoñamiento, embarazo adolescente y abuso sexual, drogadicciones, Chagas, malnutrición, sobrepeso, obesidad, enfermedades crónicas no transmisibles (HTA, DBT).Fil: Tobaldi, Florencia. Universidad Católica de Córdoda. Facultad de Ciencias de la Salud; Argentin

“Que el sobrepeso no pese en tu salud”: promoción y prevención del sobrepeso y la obesidad

Como estudiantes del área de la salud, conocemos que la obesidad, el sobrepeso y sobre todo los malos hábitos alimentarios son factores predisponentes en el desarrollo de enfermedades cardiovasculares, diabetes, trastornos del aparato osteomio-articular y la predisposición a ciertos canceres. Según la Organización Mundial de la Salud, el sobrepeso y la obesidad se definen como una acumulación anormal o excesiva de grasa en el organismo que puede ser perjudicial para la salud. Se detecta a través del índice de masa corporal, relacionando el peso y la talla de la persona. En la actual sociedad en que vivimos, donde no se generan buenos hábitos de alimentación, se promueve el sedentarismo y el consumo de alimentos ricos en grasas, nos vemos responsables como futuros profesionales de transmitir a la comunidad la información necesaria sobre este problema de salud.Fil: Tobaldi, Florencia. Universidad Católica de Córdoda. Facultad de Ciencias de la Salud; Argentin

Synthesis of Co–TiO2 nanostructured photocatalytic coatings for MDF substrates

This paper describes for the first time the development of novel photocatalytic coatings specifically for medium density fibreboard (MDF) substrates. Anatase nanostructures were manufactured using a sol–gel synthesis route and subsequently heat-treated to form micro-sized agglomerates. In this study titanium dioxide particles were doped with cobalt in order to reduce the band gap and promote photocatalysis in the visible wavelength range. These agglomerates were then bound to MDF using a polyurethane-based binder. The subsequent coatings were tested under white, green and ultraviolet light using ink intelligent photoactive dyes in a gaseous environment and methylene blue indicator in an aqueous environment. Manufactured particles were also compared to the commercially available products P25 and Kronoclean 7000. The physical and chemical properties of the manufactured particles and substrates were evaluated using electron microscopy, X-ray diffraction and Raman spectroscopy. This work demonstrates the performance of photocatalytic coatings applied to MDF

Sin sal, el verdadero sabor de la vida

Fil: Viglianco, Valentín. Universidad Católica de Córdoba. Facultad de Ciencias de la Salud; ArgentinaFil: Tobaldi, Florencia. Universidad Católica de Córdoba. Facultad de Ciencias de la Salud; Argentin

Solid-gas phase photo-catalytic behaviour of rutile and TiOn (1<n<2) sub-oxide phases for self-cleaning applications

The solid-gas phase photo-catalytic activities of rutile TiO₂ and TiO n (1 &lt; n &lt; 2) sub-oxide phases have been evaluated. Varying concentrations of Ti 3+ defects were introduced into the rutile polymorph of titanium dioxide through carbo-thermal reduction at temperatures ranging from 350 °C to 1300 °C. The resulting sub-oxides formed were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, impedance spectroscopy and UV-visible diffuse reflectance spectroscopy. The presence of Ti 3+ in rutile exposed to high reduction temperatures was confirmed by X-ray diffraction. In addition, a Ti 3+-Ti 4+ system was demonstrated to enhance the photo-catalytic properties of rutile for the degradation of the air pollutants NO₂ and CO₂ under UV irradiation of wavelengths (λ) 376⁻387 nm and 381⁻392 nm. The optimum reduction temperature for photo-catalytic activity was within the range 350⁻400 °C and attributed to improved charge-separation. The materials that were subject to carbo-thermal reduction at temperatures of 350 °C and 400 °C exhibited electrical conductivities over one hundred times higher compared to the non-reduced rutile. The results highlight that sub-oxide phases form an important alternative approach to doping with other elements to improve the photo-catalytic performance of TiO₂. Such materials are important for applications such as self-cleaning where particles can be incorporated into surface coatings. </p

Impact of the absolute rutile fraction on TiO2 visible-light absorption and visible-light-promoted photocatalytic activity

Titanium dioxide is by far the most used semiconductor material for photocatalytic applications. Still, it is transparent to visible-light. Recently, it has been proved that a type-II band alignment for the rutile − anatase mixture would improve visible-light absorption. In this research paper we thoroughly characterised the real crystalline and amorphous phases of synthesised titanias – thermally treated at different temperatures to get distinct ratios of anatase-rutile-amorphous fraction – as well as that of three commercially available photocatalytic nano-TiO2. Optical spectroscopy showed that even a small fraction of rutile (2 wt%) is able to shift to lower energies the apparent optical band gap of an anatase-rutile mixed phase. But is this enough to attain a real photocatalytic activity promoted by merely visible-light? We tried to give an answer to that question. Photocatalytic activity was assessed in the liquid- and gas-solid phase (employing rhodamine B and 4-chlorophenol, and isopropanol, respectively, as the organic substances to degrade) using a light source irradiating exclusively in the visible-range. Photocatalytic activity results in the liquid-solid phase showed that a high surface hydroxylation led to specimen with superior visible light-promoted catalytic activity – i.e. dye and ligand-to-metal charge transfer complexes sensitisation effects, not photocatalysis sensu-strictu. On the other hand, the gas-solid phase results showed that a higher amount of the absolute rutile fraction (around 10 wt%), together with less recombination of the charge carriers, were more effective for both visible-light absorption and a “real” visible-light promoted photocatalytic oxidation of isopropanol.publishe

Synthesis of Co–TiO2 nanostructured photocatalytic coatings for MDF substrates

This paper describes for the first time the development of novel photocatalytic coatings specifically for medium-density fibreboard (MDF) substrates. Anatase nanostructures were manufactured using a sol–gel synthesis route and subsequently heat-treated to form micro-sized agglomerates. In this study titanium dioxide particles were doped with cobalt in order to reduce the band gap and promote photocatalysis in the visible wavelength range. These agglomerates were then bound to MDF using a polyurethane-based binder. The subsequent coatings were tested under white, green and ultraviolet light using ink intelligent photoactive dyes in a gaseous environment and methylene blue indicator in an aqueous environment. Manufactured particles were also compared to the commercially available products P25 and Kronoclean 7000. The physical and chemical properties of the manufactured particles and substrates were evaluated using electron microscopy, X-ray diffraction and Raman spectroscopy. This work demonstrates the performance of photocatalytic coatings applied to MDF. </jats:p

Carbon-modified titanium oxide materials for photocatalytic water and air decontamination

Titanium oxide-based materials with different physical and chemical features were synthetized aiming at removing organic pollutants from both water and air media. The materials were produced employing two different heating methodologies (thermal, T and hydrothermal, H) at distinct temperatures resulting in porous materials. These materials were also modified with either graphene oxide (GO) or carbon nanotubes (CNT), using an in-situ approach. All materials were tested as photocatalysts using ultra-violet (UV), visible (Vis) and solar radiation. Rhodamine B (RhB) and benzene were used as representative pollutants in water and air, respectively. The addition of carbon to the catalysts improved the removal of both pollutants. In the case of the photocatalytic degradation of rhodamine B, under both UV and Vis light, it was found that, the materials containing carbon nanostructures allowed the highest degradation degree, while the photosensitisation phenomenon became negligible. The best catalyst is the one containing CNT (2.98 wt% of C) and thermally treated at 300 °C (T300_CNT). This material showed higher degradation ability than the commercial TiO2 nanopowder Degussa P25 (P25) under Vis light. Regarding benzene removal, the samples thermally treated at 300 °C and modified with CNT and GO (T300_CNT and T300_GO, respectively) outperformed Degussa P25. The former material was successfully reused in the photocatalytic degradation of benzene over 6 consecutive cycles.publishe