Hábitat

“Hábitat” narra la historia de Ana, una trabajadora doméstica y la relación con Yanina, su empleadora. Refleja no solo una configuración del entramado social, donde la empleada naturaliza la vulnerabilidad de sus derechos y la violencia que recibe, sino que también da cuenta de un vínculo ambivalente que persiste a lo largo de todo el cortometraje.Tesis colectiva en co-autoría con Lucía Avalos y Rafael Rodrigo Bravo (ver "Documentos relacionados").Facultad de Arte

Diffusion study in tailored gratings recorded in photopolymer glass with high refractive index species

We report results on the temporal evolution of the diffraction efficiency of volume holographic gratings recorded in a photopolymer glass incorporating Zr-based high refractive index species (HRIS) at molecular level. We record high spatial frequency gratings in this material with diffraction efficiencies near 100%. A two-component diffusion model is introduced for the evolution of refractive index modulation in darkness. Diffusion parameters for the Zr-based HRIS and monomer components have been determined. Codirectional diffusion of both components is demonstrated. The results show the feasibility for tailoring in this photomaterial holographic gratings with high diffraction efficiency over a wide range of spatial frequencies. (C) 2007 American Institute of Physics

A volume holographic sol-gel material with large enhancement of dynamic range by incorporation of high refractive index species

© 2006 WILEY-VCH Verlag GmbH & Co. KGaA. This work was supported by MEC under the projects MAT2003-02718 and TIC2002-1846, and by CM under the project S0505/PPQ-0316. We gratefully acknowledge Carmen Munuera and Prof. Carmen Ocal for technical assistance and discussions concerning STM.Improved performance of volume holographic sol-gel materials-refractive index modulations in the 10^2 range, diffraction efficiencies near 100 %, and low levels of noise scattering-are reported that arise from the incorporation of Zr-based high refractive index species capable of diffusing from dark to bright fringes of the interference pattern (see figure).Depto. de ÓpticaFac. de Ciencias FísicasTRUEMinisterio de Educación y Ciencia (MEC), EspañaComunidad de Madrid (CAM)pu

Carbon–GO Composites with Preferential Water versus Ethanol Uptake

The elimination of small amounts of water from alcohols is by no means a trivial issue in many practical applications like, for instance, the dehumidification of biocombustibles. The use of carbonaceous materials as sorbents has been far less explored than that of other materials because their hydrophobic character has typically limited their water uptake. Herein, we designed a synthetic process based on the use of eutectic mixtures that allowed the homogeneous dispersion of graphene oxide (GO) in the liquid containing the carbon precursor, e.g., furfuryl alcohol. Thus, after polymerization and a subsequent carbonization process, we were able to obtain porous carbon–GO composites where the combination of pore diameter and surface hydrophilicity provided a remarkable capacity for water uptake but extremely low methanol and ethanol uptake along the entire range of relative pressures evaluated in this work. Both the neat water uptake and the uptake difference between water and either methanol or ethanol of our carbon–GO composites were similar or eventually better than the uptake previously reported for other materials, also exhibiting preferential water-to-alcohol adsorption, e.g., porous coordination polymers, metal–organic frameworks, polyoxometalates, and covalent two-dimensional nanosheets embedded in a polymer matrix. Moreover, water versus alcohol uptake was particularly remarkable at low partial pressures in our carbon–GO composites.This work was supported by MINECO/FEDER (Project Numbers MAT2015-68639-R, MAT2016-80285-P, and RTI2018-097728-B-I00). L.Z.G. acknowledges the Chinese Scholarship Council for a PhD research fellowship (CSC No. 201608330266). C.C.-C. acknowledges UA for a research contract

Water adsorption in porous TiO_2–SiO_2 sol–gel films analyzed by spectroscopic ellipsometry

High refractive index TiO_2–SiO_2 thin films were prepared by the sol–gel method and the optical properties were characterized by spectroscopic ellipsometry. The results of the optical analysis were related with the TiO_2–SiO_2 molar ratio of the porous films. It was obtained that the higher is the TiO_2 molar ratio, the higher is the refractive index and the lower is the thickness under the same deposition conditions. In fact, when the TiO_2–SiO_2 molar ratio varies from 70–30% to 100–0%, the refractive index and the thickness vary from ~1.85 to ~1.95 λ=500 nm and from ~65 nm to ~40 nm, respectively. The water adsorption in the pores of the material produces a change in the refractive index of the film. The variation of the optical properties with the environmental relative humidity was also studied. In addition, information about the size and the shape of the pores was extracted from the water adsorption isotherms measured by ellipsometry

Enzyme-induced graft polymerization for preparation of hydrogels: synergetic effect of laccase-immobilized-cryogels for pollutants adsorption

The use of polyethylene oxide-polypropylene oxide-polyethylene oxide block-copolymers as a mediator in the laccase-induced graft polymerization of diacrylic derivate of polyethylene glycols resulted in the formation of PEG-g-F68 hydrogels. The proper oxygen content in the reaction medium to obtain reasonable polymerization conversions (i.e., on one hand, laccase needs oxygen as substrate whereas, on the other, oxygen is a strong inhibitor of radical polymerizations) was achieved by the use of an enzymatic scavenging system consisting of glucose oxidase and glucose. Eventually, laccase was immobilized within the resulting PEG-g-F68 hydrogel with full preservation of enzyme activity. Laccases have been used for bioremediation purposes because of their ability to degrade phenolic compounds. Thus, laccase-immobilized PEG-g-F68 hydrogels were submitted to the ISISA (ice segregation induced self-assembly) process for preparation of laccase-immobilized PEG-g-F68 cryogels which exhibited a macroporous structure where immobilized laccase preserved almost total activity (ca. 90%) for a period exceeding three months after preparation. Synergy between macroporous structure (deriving from the ISISA process), amphiphilic domains (deriving from graft copolymer) and activity of the immobilized enzyme provided outstanding adsorption capabilities to the cryogels (up to 235 mg g(-1))This work was supported by MICINN (MAT2009-10214, MAT2009-09671 and PET2008-0168-01) and CSIC (200660F011). M. N. and S. N. thank CSIC for a research contract and a PhD fellowship, respectively. C. A. thanks MICINN for a Ramon y Cajal contract. We thank F. Pinto for assistance with SEM.Peer reviewe

Saúde, otimismo e enfrentamento em trabalhadores profissionais e não profissionais que trabalham em contextos muito estressantes

El objetivo de la presente investigación es identificar la relación entre salud, optimismo disposicional y estilos de afrontamiento en trabajadores, profesionales y no profesionales que trabajan en contextos altamente estresantes, en la ciudad de Talca, Chile. Se evaluaron 119 trabajadores de diversas instituciones dedicadas a la atención de personas vulnerables socialmente, con los siguientes instrumentos: el General Health Questionnaire (GHQ-28), el Life Orientation Test-Revised (LOT-R), y la Escala de Evaluación de Técnicas de Afrontamiento (COPE). Los resultados indican que un 18% de la muestra presenta una alteración en su funcionamiento emocional normal, siendo la mayoría trabajadoras no profesionales. No se encontró relación entre estado de salud reportada y optimismo disposicional; sin embargo, sí se observaron correlaciones entre estas variables y algunos estilos de afrontamiento. En el caso de la sintomatología de salud reportada, se observaron correlaciones negativas con algunos estilos que conforman el afrontamiento centrado en el problema, y correlaciones positivas con algunos estilos que conforman el afrontamiento de evitación. Por su parte, el optimismo disposicional presenta una correlación positiva con algunos estilos del factor de afrontamiento centrado en el problema, y una correlación negativa con la desconexión conductual. Estos resultados muestran que existen estilos favorecedores de la salud, como la reinterpretación positiva y el crecimiento personal, que podrían ser considerados en planes de intervención de salud y autocuidado para los trabajadores. Es necesario seguir profundizando la investigación en este contexto, incluyendo elementos organizacionales con el fin de comprender mejor las diferencias entre los trabajadores profesionales y no profesionales.O objetivo da presente pesquisa é identificar a relação entre saúde, otimismo disposicional e estilos de enfrentamento em trabalhadores profissionais e não profissionais que trabalham em contextos altamente estressantes, na cidade de Talca, Chile. Avaliaram-se 119 trabalhadores de diversas instituições dedicadas ao atendimento de pessoas vulneráveis socialmente, com os seguintes instrumentos: o General Health Questionnaire (GHQ-28), o Life Orientation Test-Revised (LOT-R), e a Escala de Avaliação de Técnicas de Enfrentamento (COPE). Os resultados indicam que 18% da mostra apresenta uma alteração no seu funcionamento emocional normal, sendo a maioria trabalhadoras não profissionais. Não foi encontrada relação entre o estado de saúde informado e otimismo disposicional; porém, foram observadas correlações entre essas variáveis e alguns estilos de enfrentamento. No caso da sintomatologia de saúde informada, observaram-se correlações negativas com alguns estilos que formam o enfrentamento centrado no problema, e correlações positivas com alguns estilos que foram o enfrentamento de evitação. Por sua parte, o otimismo disposicional apresenta una correlação positiva com alguns estilos do fator de enfrentamento centrado no problema, e uma correlação negativa com a desconexão conductual. Estes resultados mostram que existem estilos favorecedores da saúde, como a reinterpretação positiva e o crescimento pessoal, que poderiam ser considerados em planos de intervenção de saúde e autocuidado para os trabalhadores. É necessário continuar aprofundando a pesquisa neste contexto, incluindo elementos organizacionais com o objetivo de compreender melhor as diferenças entre os trabalhadores profissionais e não profissionais.The aim of this research is to identify the relationship between health status, dispositional optimism and coping style in professionals and non professionals working in highly stressful environments in the city of Talca-Chile. 119 professionals and non professionals from different institutions dedicated to the care of socially vulnerable people were assessed with the following questionnaires: the General Health Questionnaire (GHQ-28), the Life Orientation Test (LOR-R) and the Stress-Management Evaluation Scale (COPE for its Spanish acronym). Results show that 18% of the participants have an alteration in their emotional well-being, a group where the majority was mainly non professional women workers. No relationship was found between self-reported health status and dispositional optimism. However, correlations were found between these variables and coping styles. In the case of reported health symptoms, there were negative correlations with coping styles that involve problem-focused coping, and positive correlations with some styles that involve avoidance coping. Meanwhile, dispositional optimism shows a positive correlation with problem-focused coping and with some styles that make up this factor, and a negative correlation with behavioral disengagement. Results show that there are health-promoting coping styles, such as positive reinterpretation and personal growth, which could be used for developing health plans and self-care interventions for these workers. It is necessary to further deepen the research in this context, including organizational elements in order to better understand the differences between professional and nonprofessional workers

Quantitative proteomics identify Tenascin-C as a promoter of lung cancer progression and contributor to a signature prognostic of patient survival

The extracellular microenvironment is an integral component of normal and diseased tissues that is poorly understood owing to its complexity. To investigate the contribution of the microenvironment to lung fibrosis and adenocarcinoma progression, two pathologies characterized by excessive stromal expansion, we used mouse models to characterize the extracellular matrix (ECM) composition of normal lung, fibrotic lung, lung tumors, and metastases. Using quantitative proteomics, we identified and assayed the abundance of 113 ECM proteins, which revealed robust ECM protein signatures unique to fibrosis, primary tumors, or metastases. These analyses indicated significantly increased abundance of several S100 proteins, including Fibronectin and Tenascin-C (Tnc), in primary lung tumors and associated lymph node metastases compared with normal tissue. We further showed that Tnc expression is repressed by the transcription factor Nkx2-1, a well-established suppressor of metastatic progression. We found that increasing the levels of Tnc, via CRISPR-mediated transcriptional activation of the endogenous gene, enhanced the metastatic dissemination of lung adenocarcinoma cells. Interrogation of human cancer gene expression data revealed that high TNC expression correlates with worse prognosis for lung adenocarcinoma, and that a three-gene expression signature comprising TNC, S100A10, and S100A11 is a robust predictor of patient survival independent of age, sex, smoking history, and mutational load. Our findings suggest that the poorly understood ECM composition of the fibrotic and tumor microenvironment is an underexplored source of diagnostic markers and potential therapeutic targets for cancer patients