TiO2/clay as a heterogeneous catalyst in photocatalytic/photochemical oxidation of anionic reactive blue 19

AbstractA TiO2-coated Tunisian clay (TiO2–clay) was synthesized by a typical impregnation method. The physicochemical characterization points to a successful impregnation of titania on the clay surface. The activity of this structured catalyst was studied in the photocatalytic/photochemical oxidation of anionic reactive blue 19 (RB 19). The effect of UVA and solar irradiation (UV-solar) was studied at room temperature. TiO2–clay demonstrated an effective degradation of RB 19 under both types of irradiation. Moreover, in this study, the effects of various oxidants such as hydrogen peroxide (H2O2), potassium peroxodisulfate (K2S2O8) and sodium carbonate (Na2CO3) were thoroughly investigated. H2O2 was a promising oxidant for promoting RB 19 degradation under UVA. The kinetics of discoloration of RB 19 followed a pseudo-first-order rate law. We can remark that 20min of UV irradiation was enough to achieve 100% discoloration of the aqueous solution. However, under UV–Vis, HPLC and chemical oxygen demand measurements indicated, that a longer reaction time (of around 45min) was required for achieving the complete dye mineralization. The findings clearly demonstrated the applicability of this TiO2/clay catalyst for the photocatalytic oxidation of RB 19

Análise da influência cultural na interação dos usuários com o Facebook sob a ótica de tecnologias persuasivas/ Análisis de la influencia cultural en la interacción del usuario con Facebook desde la perspectiva de las tecnologías persuasivas

O Facebook é uma rede social usada por mais de um bilhão de usuários, e está presente em vários países tentando influenciar as pessoas a adotarem determinados comportamentos alvos. Este trabalho foi realizado visando analisar a influência cultural na interação dos usuários no contexto das tecnologias persuasivas. Para isso foi realizado um estudo de caso sobre a utilização da rede social Facebook, comparando o Brasil com outros países, sendo os dados da utilização obtidos via questionários e analisados por métodos estatísticos. Concluiu-se que os usuários das culturas analisadas possuem comportamento semelhante na rede

Effect of Biodiesel impurities (K, Na, P) on non-catalytic and catalytic activities of Diesel soot in model DPF regeneration conditions

Abstract(#br)The impact of Biodiesel impurities (Na, K and P) on the non-catalytic and catalytic reactivity of Diesel soot was evaluated under model DPF (Diesel Particulate Filter) regeneration conditions. Temperature-programmed oxidation (TPO) measurements confirmed that Na and K depositing into soot or on the surface of the catalyst enhanced the oxidative reactivity of soot under both O 2 and NO x + O 2 and Na-doped samples showed better results. However, the presence of P inhibited the non-catalytic and catalytic reactivity. These findings can be mainly attributed to the changes in nanostructure and surface chemical properties of the doped samples, characterized by Raman, high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), H 2 temperature-programmed reduction (H 2 -TPR) and NO temperature-programmed oxidation (NO-TPO). The result of this characterization evidenced that the presence of Na and K increased structural defects of soot and reduction ability of the catalyst. Moreover, Na-/K-doped catalysts presented higher oxidizing ability of NO into NO 2 , whereas the opposite trend was observed for the P-containing catalysts. In addition, higher structural disorder of Na-doped soot and higher alkali metal content on the surface of Na-doped catalyst might lead to enhanced reactivity in comparison to K-doped soot and catalyst

Development of a T cell-based immunodiagnostic system to effectively distinguish SARS-CoV-2 infection and COVID-19 vaccination status

Both SARS-CoV-2 infections and COVID-19 vaccines elicit memory T cell responses. Here, we report the development of 2 pools of experimentally defined SARS-CoV-2 T cell epitopes that, in combination with spike, were used to discriminate 4 groups of subjects with different SARS-CoV-2 infection and COVID-19 vaccine status. The overall T cell-based classification accuracy was 89.2% and 88.5% in the experimental and validation cohorts. This scheme was applicable to different mRNA vaccines and different lengths of time post infection/post vaccination and yielded increased accuracy when compared to serological readouts. T cell responses from breakthrough infections were also studied and effectively segregated from vaccine responses, with a combined performance of 86.6% across all 239 subjects from the 5 groups. We anticipate that a T cell-based immunodiagnostic scheme to classify subjects based on their vaccination and natural infection history will be an important tool for longitudinal monitoring of vaccinations and for establishing SARS-CoV-2 correlates of protection

An embedded cohesive crack model for finite element analysis of quasi-brittle materials

This paper presents a numerical implementation of the cohesive crack model for the anal-ysis of quasibrittle materials based on the strong discontinuity approach in the framework of the finite element method. A simple central force model is used for the stress versus crack opening curve. The additional degrees of freedom defining the crack opening are determined at the crack level, thus avoiding the need for performing a static condensation at the element level. The need for a tracking algorithm is avoided by using a consistent pro-cedure for the selection of the separated nodes. Such a model is then implemented into a commercial program by means of a user subroutine, consequently being contrasted with the experimental results. The model takes into account the anisotropy of the material. Numerical simulations of well-known experiments are presented to show the ability of the proposed model to simulate the fracture of quasibrittle materials such as mortar, concrete and masonry

Illness perceptions of COVID-19 in Europe: Predictors, impacts and temporal evolution

Objective: Illness perceptions (IP) are important predictors of emotional and behavioral responses in many diseases. The current study aims to investigate the COVID-19-related IP throughout Europe. The specific goals are to understand the temporal development, identify predictors (within demographics and contact with COVID-19) and examine the impacts of IP on perceived stress and preventive behaviors. Methods: This was a time-series-cross-section study of 7, 032 participants from 16 European countries using multilevel modeling from April to June 2020. IP were measured with the Brief Illness Perception Questionnaire. Temporal patterns were observed considering the date of participation and the date recoded to account the epidemiological evolution of each country. The outcomes considered were perceived stress and COVID-19 preventive behaviors. Results: There were significant trends, over time, for several IP, suggesting a small decrease in negativity in the perception of COVID-19 in the community. Age, gender, and education level related to some, but not all, IP. Considering the self-regulation model, perceptions consistently predicted general stress and were less consistently related to preventive behaviors. Country showed no effect in the predictive model, suggesting that national differences may have little relevance for IP, in this context. Conclusion: The present study provides a comprehensive picture of COVID-19 IP in Europe in an early stage of the pandemic. The results shed light on the process of IP formation with implications for health-related outcomes and their evolution. © Copyright © 2021 Dias Neto, Nunes da Silva, Roberto, Lubenko, Constantinou, Nicolaou, Lamnisos, Papacostas, Höfer, Presti, Squatrito, Vasiliou, McHugh, Monestès, Baban, Alvarez-Galvez, Paez-Blarrina, Montesinos, Valdivia-Salas, Ori, Lappalainen, Kleszcz, Gloster, Karekla and Kassianos

O PROCESSO DE APRENDIZAGEM DAS CRIANÇAS AUTISTAS E A INCLUSÃO SOCIAL

This article aims to describe the challenges for the inclusion of children with Autism Spectrum Disorder (ASD), emphasizing difficulties, characteristics, behaviors, social relationships and inclusion. Autism is described as a developmental syndrome that usually manifests itself in children, ranging from mild to more severe. Law 12.764/2012 guarantees the right of the person with ASD to obtain adequate care in regular education, so it is essential to ensure its inclusion. The study is a bibliographic research, qualitative and dialectical in nature. The results indicate that children with autism have technical skills, but need different methodologies so that they can acquire social skills, it is stressed that the focus of special education cannot be centered on activities, but in pedagogical aspects, different activities for autistic children can lead to exclusion.  Este artículo tiene como objetivo describir los desafíos para la inclusión de los niños con Trastorno del Espectro Autista (TEA), enfatizando las dificultades, características, comportamientos, relaciones sociales e inclusión. El autismo se describe como un síndrome del desarrollo que generalmente se manifiesta en los niños, que va de leve a más grave. La Ley 12.764/2012 garantiza el derecho de la persona con TEA a obtener una atención adecuada en la educación regular, por lo que es fundamental asegurar su inclusión. El estudio es una investigación bibliográfica, cualitativa y dialéctica. Los resultados indican que los niños con autismo tienen habilidades técnicas, pero necesitan diferentes metodologías para que puedan adquirir habilidades sociales, se destaca que el enfoque de la educación especial no puede centrarse en las actividades, sino que en aspectos pedagógicos, las diferentes actividades para niños autistas pueden llevar a la exclusión.Este artigo tem como objetivo descrever os desafios para a inclusão de crianças com Transtorno do Espectro Autista (TEA), enfatizando dificuldades, características, comportamentos, relações sociais e inclusão. O autismo é descrito como uma síndrome do desenvolvimento que se manifesta normalmente em crianças, podendo variar do leve ao mais severo.  A Lei 12.764/2012 garante o direito da pessoa com TEA em obter atendimento adequado no ensino regular, por isso é imprescindível assegurar sua inclusão. O estudo se constitui em uma pesquisa bibliográfica, de cunho qualitativo e dialético. Os resultados indicam que as crianças com autismo possuem habilidades técnicas, porém necessitam de metodologias diferentes para que possam adquirir as habilidades sociais, sublinha-se que o foco da educação especial não pode estar centrado nas atividades, mas nos aspectos pedagógicos, atividades diferentes para as crianças autistas podem conduzir a exclusão.Este artigo tem como objetivo descrever os desafios para a inclusão de crianças com Transtorno do Espectro Autista (TEA), enfatizando dificuldades, características, comportamentos, relações sociais e inclusão. O autismo é descrito como uma síndrome do desenvolvimento que se manifesta normalmente em crianças, antes dos três anos. Atualmente, vem sendo bem mais divulgado pela mídia, descrito como um espectro, pois as características podem variar do leve ao mais severo.  A Lei 12.764/2012 garante o direito da pessoa com TEA em obter atendimento adequado no ensino regular, por isso é imprescindível assegurar sua inclusão. O estudo se constitui em uma pesquisa bibliográfica, de cunho qualitativo e dialético. Os resultados indicam que as crianças com autismo possuem habilidades técnicas, porém necessitam de metodologias diferentes para que possam adquirir as habilidades sociais, sublinha-se que o foco da educação especial não pode estar centrado nas atividades, mas nos aspectos pedagógicos, atividades diferentes para as crianças autistas podem conduzir a exclusão

O PROCESSO DE APRENDIZAGEM DAS CRIANÇAS AUTISTAS E A INCLUSÃO SOCIAL

This article aims to describe the challenges for the inclusion of children with Autism Spectrum Disorder (ASD), emphasizing difficulties, characteristics, behaviors, social relationships and inclusion. Autism is described as a developmental syndrome that usually manifests itself in children, ranging from mild to more severe. Law 12.764/2012 guarantees the right of the person with ASD to obtain adequate care in regular education, so it is essential to ensure its inclusion. The study is a bibliographic research, qualitative and dialectical in nature. The results indicate that children with autism have technical skills, but need different methodologies so that they can acquire social skills, it is stressed that the focus of special education cannot be centered on activities, but in pedagogical aspects, different activities for autistic children can lead to exclusion.  Este artículo tiene como objetivo describir los desafíos para la inclusión de los niños con Trastorno del Espectro Autista (TEA), enfatizando las dificultades, características, comportamientos, relaciones sociales e inclusión. El autismo se describe como un síndrome del desarrollo que generalmente se manifiesta en los niños, que va de leve a más grave. La Ley 12.764/2012 garantiza el derecho de la persona con TEA a obtener una atención adecuada en la educación regular, por lo que es fundamental asegurar su inclusión. El estudio es una investigación bibliográfica, cualitativa y dialéctica. Los resultados indican que los niños con autismo tienen habilidades técnicas, pero necesitan diferentes metodologías para que puedan adquirir habilidades sociales, se destaca que el enfoque de la educación especial no puede centrarse en las actividades, sino que en aspectos pedagógicos, las diferentes actividades para niños autistas pueden llevar a la exclusión.Este artigo tem como objetivo descrever os desafios para a inclusão de crianças com Transtorno do Espectro Autista (TEA), enfatizando dificuldades, características, comportamentos, relações sociais e inclusão. O autismo é descrito como uma síndrome do desenvolvimento que se manifesta normalmente em crianças, podendo variar do leve ao mais severo.  A Lei 12.764/2012 garante o direito da pessoa com TEA em obter atendimento adequado no ensino regular, por isso é imprescindível assegurar sua inclusão. O estudo se constitui em uma pesquisa bibliográfica, de cunho qualitativo e dialético. Os resultados indicam que as crianças com autismo possuem habilidades técnicas, porém necessitam de metodologias diferentes para que possam adquirir as habilidades sociais, sublinha-se que o foco da educação especial não pode estar centrado nas atividades, mas nos aspectos pedagógicos, atividades diferentes para as crianças autistas podem conduzir a exclusão.Este artigo tem como objetivo descrever os desafios para a inclusão de crianças com Transtorno do Espectro Autista (TEA), enfatizando dificuldades, características, comportamentos, relações sociais e inclusão. O autismo é descrito como uma síndrome do desenvolvimento que se manifesta normalmente em crianças, antes dos três anos. Atualmente, vem sendo bem mais divulgado pela mídia, descrito como um espectro, pois as características podem variar do leve ao mais severo.  A Lei 12.764/2012 garante o direito da pessoa com TEA em obter atendimento adequado no ensino regular, por isso é imprescindível assegurar sua inclusão. O estudo se constitui em uma pesquisa bibliográfica, de cunho qualitativo e dialético. Os resultados indicam que as crianças com autismo possuem habilidades técnicas, porém necessitam de metodologias diferentes para que possam adquirir as habilidades sociais, sublinha-se que o foco da educação especial não pode estar centrado nas atividades, mas nos aspectos pedagógicos, atividades diferentes para as crianças autistas podem conduzir a exclusão

Illness Perceptions of COVID-19 in Europe: Predictors, Impacts and Temporal Evolution

Objective: Illness perceptions (IP) are important predictors of emotional and behavioral responses in many diseases. The current study aims to investigate the COVID-19-related IP throughout Europe. The specific goals are to understand the temporal development, identify predictors (within demographics and contact with COVID-19) and examine the impacts of IP on perceived stress and preventive behaviors. Methods: This was a time-series-cross-section study of 7,032 participants from 16 European countries using multilevel modeling from April to June 2020. IP were measured with the Brief Illness Perception Questionnaire. Temporal patterns were observed considering the date of participation and the date recoded to account the epidemiological evolution of each country. The outcomes considered were perceived stress and COVID-19 preventive behaviors. Results: There were significant trends, over time, for several IP, suggesting a small decrease in negativity in the perception of COVID-19 in the community. Age, gender, and education level related to some, but not all, IP. Considering the self-regulation model, perceptions consistently predicted general stress and were less consistently related to preventive behaviors. Country showed no effect in the predictive model, suggesting that national differences may have little relevance for IP, in this context. Conclusion: The present study provides a comprehensive picture of COVID-19 IP in Europe in an early stage of the pandemic. The results shed light on the process of IP formation with implications for health-related outcomes and their evolution