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Efeito do nanomaterial de óxido de grafeno (GO) de interesse da indústria petrolífera: in vitro e in vivo
(Universidade Federal de São Carlos, 2026-01-30)
Albuquerque, Yulli Roxenne
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Anibal, Fernanda de Freitas
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https://lattes.cnpq.br/4918261968772806
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https://lattes.cnpq.br/7896826463889321
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https://orcid.org/0000-0001-8501-4695
Graphene oxide (GO) is a two-dimensional nanomaterial derived from graphite, functionalized with oxygen-containing groups that confer hydrophilic properties and surface reactivity, enabling a wide range of industrial applications. However, expanding its use requires a better understanding of its biological effects and potential health risks. This study aimed to evaluate the nanotoxicity of GO developed for enhanced oil recovery, considering its physicochemical properties and biological responses in experimental models. GO was characterized by Fourier-transform infrared spectroscopy, thermogravimetric analysis, dynamic light scattering, zeta potential, and scanning electron microscopy. The results confirmed the presence of characteristic oxygen-containing functional groups and demonstrated dispersion medium-dependent behavior, with greater colloidal stability in ultrapure water than in saline solution (0.9%) or DMEM, and mean equivalent circular diameters of 11.37 μm in water and 11.78 μm in DMEM. In vitro, HepG2 cells exposed to GO (100-500 μg/mL) showed a transient increase in mitochondrial metabolic activity, suggesting adaptive cellular responses. In vivo, BALB/c mice were exposed via intraperitoneal administration at doses ranging from 5 to 50 mg/kg. Transient reductions in food and water intake and body weight were observed, accompanied by changes in the leukocyte profile. These changes included increased neutrophils and decreased total leukocytes, mononuclear cells, and eosinophils in peritoneal cavity lavage, as well as elevated neutrophil counts in bronchoalveolar lavage. Among the cytokines evaluated (IL-6, IFN-γ, and TNF), only IL-6 showed a significant reduction in peritoneal cavity lavage. An increase in relative liver weight associated with GO accumulation, elevated serum aspartate aminotransferase levels, and histopathological alterations in the liver, spleen, and lungs characterized by inflammatory infiltrates were also observed. These findings suggest that GO may induce mild local inflammatory responses and dose-dependent hepatic accumulation, highlighting the importance of further studies with prolonged exposure to assess potential adverse effects over time and to investigate the reversibility of the observed biological responses.
O corpo da professora pedagoga na relação com as crianças pequenas: do chão da creche aos documentos oficiais
(Universidade Federal de São Carlos, 2026-01-30)
Machado, Monize Laís Fernandes
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Lombardi, Lucia Maria Salgado dos Santos
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https://lattes.cnpq.br/5697508831302188
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https://orcid.org/0000-0001-6978-864X
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https://lattes.cnpq.br/2941790773941991
This research aims to understand the body of the pedagogical teacher in relation to young children in the nursery, with the research question being "How do teacher's body affect young children and the educational processes with them?". To seek answers, the study reflected on aspects of the teacher's body integrated into the educational environment and the play of and with children, and carried out an analysis of the presence or absence of the body in official documents, namely: LDB Law No. 9,394 of 12/20/1996, General National Curriculum Guidelines for Basic Education of 2013, National Curriculum Guidelines for Early Childhood Education of 2010, National Curriculum Guidelines for the Undergraduate Course in Pedagogy of 2006 and the National Common Curriculum Base of 2017. The research adopts a qualitative approach, bibliographical nature, constituting a State of Knowledge review, documentary, focusing on the analysis of normative/legal documents, and with an (auto)biographical perspective. It dialogues with interdisciplinary studies of the body, especially with the Corpomedia theory, seeking to produce situated and implicated understandings about the complexity of teacher's body in the daycare center and its relationships with young children. The results pointed out to the importance of teacher's body in pedagogical practices and to the need to value the bodies of teachers and young children, understanding that the conception of body reverberates in pedagogical proposals and in the planning of educational time and space. The literature studied reveals a gap in body awareness training, still lacking greater space in teacher training curricula. Among the legal documents analyzed, the document governing the degree in Pedagogy indirectly provided guidance on work described as practical. In the documents governing work in daycare centers, it was possible to observe how work with child's body is guided, however, there is little mention and few direct guidelines for who will propose the guidelines: the teacher.
Entre telas e lacunas: competências digitais entre os alunos da Educação de Jovens e Adultos
(Universidade Federal de São Carlos, 2026-01-30)
Silva, Natália da Rocha da
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Kerbauy, Maria Teresa Miceli
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https://lattes.cnpq.br/4762029784021248
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https://orcid.org/0000-0002-0622-1512
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https://lattes.cnpq.br/7702854893608191
This study investigates the development of digital competencies among students enrolled in Youth and Adult Education (Educação de Jovens e Adultos – EJA), focusing on individuals who did not complete elementary education during their regular school trajectory. The research is grounded in the understanding that the intensification of digitalization in contemporary society has increased the demand for competencies related to the use of Information and Communication Digital Technologies (ICDTs), thereby deepening inequalities historically associated with low levels of schooling and socioeconomic vulnerability. This is an applied field study with a descriptive design and a quantitative approach, conducted through a data survey. A total of 110 printed questionnaires with closed ended questions were administered to students from two public municipal schools located in the cities of Araraquara and São Carlos, São Paulo, Brazil. The analysis is informed by the Science, Technology and Society (STS) field, articulating the concepts of digital competence, digital exclusion, and Youth and Adult Education. The findings indicate that although internet access is widespread among participants, the development of digital competencies remains limited and uneven. The results highlight the centrality of smartphones as the main device used to access the internet, as well as the predominance of practices related to social media use and video consumption. In contrast, there is limited use of digital tools associated with information production, organization, work-related activities, and citizenship. Significant difficulties in the digital learning process were also identified, linked to both structural and educational factors, such as low educational attainment, limited income, lack of formative mediation, insecurity in dealing with technological changes, and fear of making mistakes or falling victim to digital fraud. Despite these barriers, most participants expressed a strong interest in learning more about digital technologies, indicating that digital exclusion in this context is not the result of a lack of motivation, but rather of insufficient access to continuous and contextualized learning opportunities. It is concluded that digital exclusion goes beyond the issue of access, encompassing limitations in the autonomous, critical, and meaningful use of digital technologies. The findings reinforce the need for integrated public policies that take into account the specificities of Youth and Adult Education, combining access, training, pedagogical mediation, and material conditions in order to promote socially situated digital inclusion.
Função autonômica cardíaca e capacidade funcional em covid-19: contribuições para a confiabilidade da variabilidade de frequência cardíaca em hospitalizados e para a compreensão dos fatores que influenciam o desempenho funcional em casos leves
(Universidade Federal de São Carlos, 2026-01-31)
Araújo, Aldair Darlan Santos de
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Dibai, Daniela Bassi
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https://lattes.cnpq.br/0861598490954598
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Silva, Audrey Borghi
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https://lattes.cnpq.br/4855616925791895
Heart rate variability (HRV) and functional capacity are important markers of physiological status and cardiovascular system performance, with broad clinical and scientific applicability. The overall aim of this thesis was to test the intra- and inter-examiner reliability of HRV analysis in patients hospitalized with COVID-19, investigate cardiac autonomic modulation in individuals with mild COVID-19, and assess functional capacity in post-COVID-19 individuals with mild disease. In the first study, 103 patients hospitalized with COVID-19 were evaluated for the intra- and inter-examiner reliability of short-term HRV using linear and nonlinear indices. The analysis showed excellent reliability, with intraclass correlation coefficients (ICC) ranging from 0.956 to 0.999 and coefficients of variation below 10%, demonstrating that resting HRV measured by a portable device is highly precise, regardless of the examiner or timing of measurement. The second study investigated 130 individuals with mild COVID-19, stratified by time since infection (≤6 weeks, 2–6 months, and 7–12 months) and compared to a healthy control group. Groups with shorter time since diagnosis showed reduced parasympathetic modulation, while individuals assessed 7–12 months post-infection showed partial recovery compared to the control group. Multiple linear regressions indicated that age and time since infection were significant predictors of RMSSD and SD1, suggesting a transient effect of mild COVID-19 on the autonomic nervous system. In the third study, 115 post-COVID-19 individuals with mild disease were evaluated for functional capacity using the six-minute walk test (6MWT), cognitive function, cardiovascular responses, and determinants of functional performance. Participants assessed during the acute phase of infection (≤1 month) walked a significantly shorter distance than those assessed after three months, and depressive symptoms were also associated with reduced distance walked. No differences in cognitive function were observed among the groups, and factors such as age, BMI, sex, and anxiety did not significantly influence functional performance. Together, the results of this thesis provide robust evidence regarding HRV reliability in hospitalized patients, describe the gradual recovery of autonomic modulation following mild COVID-19, and identify factors associated with functional capacity, with important clinical implications for monitoring and rehabilitation of individuals affected by the virus.
Processos estruturais e meios alternativos de resolução de conflitos como soluções aos processos ambientais tradicionais
(Universidade Federal de São Carlos, 2026-02-01)
Ribeiro, Elen Pessoa de Queiroz
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Oliveira, Celso Maran de
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Amarante Junior, Ozelito Possidonio de
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https://lattes.cnpq.br/1314612121213589
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https://lattes.cnpq.br/9911833172043700
Apresentar e discutir alternativas viáveis que podem superar os obstáculos inerentes aos processos judiciais tradicionais e, em específico, às lides ambientais. Metodologia - Pesquisa bibliográfica, que consistiu na consulta da literatura e textos jurídicos doutrinários. Originalidade/relevância - Na seara ambiental, as formas tradicionais do processo civil não seriam adequadas: as características do dano ambiental exigem outra forma de pensar. Resultados - Foi possível entender que os processos estruturais se mostram mais apropriados para a resolução de litígios ambientais complexos, além de possibilitarem a flexibilização dos procedimentos adotados para o tratamento do problema. Já os meios alternativos de solução de conflitos na seara ambiental, previstos no artigo 8.º do Acordo de Escazú, consistem em mecanismos, como a mediação e a conciliação e a arbitragem, para resolver as controvérsias. Contribuições teóricas/metodológicas - A complexidade das lides ambientais demanda a superação dos entraves relacionadas às normas processuais tradicionais. Ademais, o uso destas alternativas aos processos judiciais tradicionais somente se mostrará efetivo se estiver condicionado à ampla participação, principalmente da sociedade e, em especial, dos grupos diretamente afetados pelo problema/objeto ambiental em questão. Contribuições sociais e ambientais - Os processos estruturais ambientais possuem o condão de trazer reformas/mudanças no status quo, porém esse potencial é pouco explorado por parte do poder judiciário. Ainda, o uso dos meios alternativos de conflitos, conciliação, mediação e arbitragem, poderia ser um meio viável para superar obstáculos como a demora no processo tradicional e as disparidades, econômicas e sociais, entre as partes envolvidas.
Mapping the needs, challenges, and strengths of a hemodialysis sector based on the Strength- based Nursing and HealthCare – Leadership philosophy
(Universidade Federal de São Carlos, 2026-02-02)
Luvizutto, Julia
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Fumincelli, Laís
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https://lattes.cnpq.br/9372589851606243
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https://orcid.org/0000-0001-9895-8214
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https://lattes.cnpq.br/2566413229968009
A doença renal crônica (DRC) representa um desafio significativo e crescente na saúde global. O papel da enfermagem na continuidade do cuidado a pacientes com DRC é fundamental e multifacetado, abrangendo desde o manejo de sintomas até o suporte emocional e educacional. Dado o contexto complexo enfrentado por pacientes com essa condição, uma ampla gama de intervenções possíveis se evidencia. Ao cuidar desses pacientes, os enfermeiros podem fundamentar sua prática clínica em modelos teóricos, principalmente na filosofia Strengths-Based Nursing and Healthcare Leadership (SBNH-L). Portanto, é imprescindível realizar um mapeamento completo dessas intervenções de enfermagem para priorizar e implementar ações direcionadas a essa população específica. Objetivo: Mapear as necessidades, os desafios e as forças, com base na filosofia SBNH-L, junto à equipe de enfermagem de uma unidade de hemodiálise de um hospital no interior do estado de São Paulo, Brasil. Materiais e Métodos: Este estudo utilizou a metodologia de Mapeamento de intervenções (MI), compreendendo a primeira etapa, o Modelo Lógico do problema, apresentado por meio de uma revisão de escopo (Artigo 1) e um estudo descritivo com abordagem qualitativa (Artigo 2). Na revisão de escopo, seguindo a metodologia JBI proposta pelo Joanna Briggs Institute (JBI), foram realizadas buscas nas bases de dados Embase e MEDLINE via OVID, CINAHL Complete, Biosis, Web of Science Core Collection, SciELO Citation Index, Scopus e na base de dados Nursing & Allied Health Premium. Esta revisão avaliou o alinhamento dessas bases de dados com os valores da filosofia de Enfermagem e Liderança em Saúde Baseadas em Forças (ELSB). Seguindo os preceitos éticos, este estudo descritivo incluiu profissionais de enfermagem atuantes no serviço de hemodiálise do hospital, tanto em assistência direta ao paciente quanto na gestão do departamento, que estivessem disponíveis e interessados em responder aos instrumentos de coleta de dados. Profissionais em férias, licença ou afastamento do trabalho foram excluídos. A coleta de dados foi realizada presencialmente na instituição ao longo de três meses. Espera-se que esta pesquisa contribua para o fortalecimento das evidências científicas e inovações na prática de enfermagem em um departamento de hemodiálise. Resultados: De 4938 artigos, 174 foram incluídos para leitura completa e 74 para extração e interpretação de dados. Os estudos foram conduzidos em diversos países e as intervenções de enfermagem identificadas são relatadas. Em relação à abordagem qualitativa do estudo, participaram treze profissionais de enfermagem, com idades entre 30 e 39 anos (38,5%), sendo que 53,8% estavam com 4 a 6 anos de experiência profissional e atuavam em um ambiente de hemodiálise. As atividades e os desafios enfrentados pelos profissionais de enfermagem na unidade de hemodiálise incluíram dificuldades com pacientes e seus familiares (69,2%), sobrecarga de trabalho (46,2%) e barreiras de comunicação dentro da equipe (46,2%). Cinco temas foram identificados: 1. Desafios no cuidado ao paciente; 2. Desafios institucionais; 3. Estratégias de enfrentamento da equipe; 4. Tecnologias e recursos necessários; 5. Pontos fortes e qualidades da equipe de enfermagem. A partir da integração de dados com a SBNH-L, destacam-se os valores de Adequação, Parcerias Colaborativas e Múltiplas Perspectivas. Conclusão: A revisão de escopo evidenciou que as intervenções de enfermagem se concentram predominantemente no autocuidado, no manejo de sintomas, no apoio emocional e na adesão ao tratamento, reforçando o papel essencial e holístico dos enfermeiros no apoio a pacientes com doença renal crônica. Complementarmente, o estudo qualitativo revelou os desafios, necessidades e pontos fortes vivenciados pela equipe de enfermagem no mundo real, enfatizando questões como carga de trabalho, barreiras de comunicação e dificuldades relacionadas ao paciente, bem como as estratégias adaptativas e as competências intrínsecas da equipe. Em conjunto, esses achados demonstram que o cuidado de enfermagem eficaz em hemodiálise deve ser fundamentado em uma abordagem multidimensional que integre intervenções baseadas em evidências com as experiências vividas e as capacidades dos profissionais de enfermagem. O alinhamento com a filosofia Strengths-Based Nursing and Healthcare Leadership (SBNH-L) ressalta a importância dos valores que orientam a prática. Em última análise, a incorporação desses princípios pode fortalecer o atendimento centrado no paciente, aumentar a resiliência e a liderança da equipe e apoiar o desenvolvimento de práticas sustentáveis e inovadoras em unidades de hemodiálise.
Lean Healthcare: barreiras e caminhos estratégicos para superá-las
(Universidade Federal de São Carlos, 2026-02-02)
Codognotto, Emanuela Leal
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Lizarelli, Fabiane Letícia
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https://lattes.cnpq.br/4525431419326559
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https://lattes.cnpq.br/4491763719499638
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Godinho Filho, Moacir
The pursuit of efficiency and quality in healthcare has led hospitals to adopt continuous improvement practices inspired by the industrial sector, such as Lean Healthcare (LH). However, organizations still face several challenges that hinder its successful implementation. This research aimed to understand the relationship between the main barriers to LH implementation and the strategic pathways to overcome them. The study adopted a mixed-methods approach, combining a Systematic Literature Review (SLR) and Content Analysis, which identified 14 strategic means related to ten main barriers, with Interpretive Structural Modeling (ISM) and MICMAC analysis, employed to map the relationships of dependence and interdependence among the factors. The results enabled the development of a comprehensive four-level framework, representing the logical progression from foundational conditions to sustainable LH outcomes. The study contributes to theory by integrating qualitative and quantitative approaches through the lens of Organizational Learning Theory, offering a hierarchical view of barriers and strategies to overcome them. From a practical perspective, it provides a structured roadmap for hospital managers to prioritize actions and strengthen organizational learning within their Lean initiatives. The originality of the research lies in the integration of ISM–MICMAC methodologies with learning theory, resulting in an innovative model to promote the sustainability of Lean Healthcare.
Elaboração e evidências de validade de um instrumento para avaliação do uso de estratégias metacognitivas por graduandos e pós-graduandos
(Universidade Federal de São Carlos, 2026-02-02)
Duarte, Laura Andrelynne Durans
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Schelini, Patrícia Waltz
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https://lattes.cnpq.br/6185333517392859
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https://orcid.org/0000-0002-7326-7086
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https://lattes.cnpq.br/3309186115738010
Metacognition refers to an individual's thoughts and knowledge about their own cognitive processes, and the subsequent ability to consciously adjust them to enhance their learning and problem-solving processes. Metacognitive strategies are components of metacognition, defined as practices adopted to monitor progress in performing a task. To assess these strategies, Psychology lacks adequate psychometric instruments with good psychometric properties. This dissertation is organized into two studies that sought to develop a new psychometric instrument to assess the use of metacognitive strategies in the university population and verify its psychometric properties. Study 1 focused on the initial development of the items and obtaining evidence of content validity through expert analysis and semantic analysis. After evaluation by judges and the target audience (undergraduate and graduate students), the Metacognitive Strategies Scale (MSS) was finalized with 48 statements. The results indicated that the MSS reached good content validity indicators, with Aiken V indices between 0.75 and 1.00, and an average semantic validity of 8.99, which attests to the clarity of the writing for the target audience. Study 2 continued the objectives, investigating the validity by internal structure, by relationship with external variables, and the reliability of the MSS in 149 undergraduate and graduate students. Exploratory Factor Analysis (EFA) and Exploratory Graphical Analysis (EGA) indicated a theoretically coherent two-dimensional solution of 17 items, composed of the factors Planning (P) and Monitoring and Regulation (MR). The evidence of convergent validity was supported by positive, moderate, and statistically significant correlations between the total MSS scores and the Metacognitive Awareness Inventory (MAI) (ρ = 0.48) and Learning and Studying Strategies Inventory (LASSI) (ρ = 0.56) instruments. Additionally, the MSS demonstrated optimal precision, with internal consistency coefficients (McDonald's ω and Cronbach's α) ranging from 0.78 to 0.85. In summary, the evidence collected suggests that the Metacognitive Strategies Scale constitutes a good quality psychometric instrument, suitable for measuring these strategies in the university target audience.
Termocronologia por traços de fissão em monazita aplicada no Domínio Ceará Central, Brasil
(Universidade Federal de São Carlos, 2026-02-03)
Pereira, Vinicius de Queirós
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Dias, Airton Natanael Coelho
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https://lattes.cnpq.br/7070166380084691
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https://lattes.cnpq.br/8855947965166625
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Oliveira, Sandro Guedes
Fission Track Thermochronology (FT) constitutes one of the principal geochronological tools for reconstructing the low-temperature thermal history of rocks, being crucial for understanding geotectonic evolution and the surface dynamics of relief. Based on the counting of microscopic tracks produced by the spontaneous fission of ²³⁸U, this technique records geological events associated with low thermal regimes with high sensitivity. In this context, monazite emerges as a particularly promising thermochronometer for ultralow-temperature ranges (25–45 °C), with the capacity to record subtle processes such as shallow exhumation and recent erosion. Despite its widespread occurrence and high uranium content, the application of FT in monazite remained limited for decades by methodological constraints, mainly due to the dependence on equations requiring the use of nuclear reactors. In this work, Monazite Fission Track Thermochronology (MFT) was implemented in an exploratory manner within the TRACKs Group based on an internal laboratory calibration equation combined with a chemical etching protocol described in the specialized literature. Analyses performed on international reference samples from Japan and Australia yielded ages consistent with previously published data, demonstrating the robustness and analytical feasibility of the adopted protocol. In addition, a chemical etching curve was constructed relating surface track density and confined track length to etching time. The revelation of tracks during chemical etching proved congruent with previously reported results, while small observed variations may be associated with the degree of accumulated radiogenic damage. These results highlight the superiority of the step-etch approach compared to the use of fixed chemical etching times. The application of MFT to Brazilian samples from the Central Ceará Domain resulted in ages ranging from 2.10 ± 0.25 to 12.15 ± 1.40 Ma, associated with ultralow-temperature conditions. This interval points to a cooling episode subsequent to the youngest magmatic events in the region, active since the Miocene. Thermal modeling corroborates these results, indicating progressive cooling until the Pleistocene, followed by a period of thermal stability. Taken together, the data reinforce the potential of MFT as an innovative and robust tool for investigations into the recent thermal evolution of the continental crust.
Limites e possibilidades das ações formativas a partir da educação CTSA no caso do cursinho pré-vestibular popular da UFSCar
(Universidade Federal de São Carlos, 2026-02-03)
Nascimento, Edson Ricardo Nunes
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Lopes, Nataly Carvalho
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https://lattes.cnpq.br/0285391776145231
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https://orcid.org/0000-0002-5113-8398
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https://lattes.cnpq.br/7163639835151778
This research aims to investigate how the articulation between Science, Technology, Society, and Environment (STSE) education and Socio-scientific Issues (SSI) can be participatorily constructed with teachers at a popular university prep course, analyzing the potentialities and limits of this integration in the context of UFSCar's Popular University Prep Course (UFSCurso). Drawing on formative processes developed with scholarship teachers enrolled in undergraduate and teacher education programs at UFSCar, and grounded in the principles of participatory action research, we sought to promote pedagogical practices that articulated university entrance exam preparation with students' critical formation. The investigation involved seven formative sessions, focal interviews, and analysis of lesson plans produced by the scholarship teachers. The results reveal significant advances in the teachers' conceptual appropriation of STSE/SSI frameworks, particularly in recognizing the non-neutrality of science and in contextualizing content through local socio-scientific themes. However, structural limitations persist, related to the pressure of the university entrance exam, administrative task overload, and the difficulty of fully materializing the more advanced stages of STSE education — particularly the preparation for sociopolitical action. The research demonstrated that popular prep courses constitute privileged contexts for critical science education, revealing a significant gap in the field of STS studies within non-formal spaces of popular education.
Políticas de transferência de renda para pessoas idosas : Uma análise atual do Benefício de Prestação Continuada no Brasil
(Universidade Federal de São Carlos, 2026-02-03)
Paz, Victor Matheus Queiroz de
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Itria, Alexander
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https://lattes.cnpq.br/7278290457268315
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https://orcid.org/0000-0001-7500-0230
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https://lattes.cnpq.br/1611745238418612
This study examines the extent to which Brazil’s Benefício de Prestação Continuada (BPC) has promoted economic security and social equity for vulnerable older adults, in the context of structural inequalities and fiscal constraints. A qualitative, exploratory approach was adopted, grounded in an integrative literature review and the analysis of secondary data from official sources, normative documents, and international reports. The findings indicate that the BPC consistently performs a non-contributory protective role by guaranteeing a minimum income and reducing immediate exposure to material deprivation, particularly among older adults whose work histories are marked by informality and low contributory density. However, the programme’s contribution to social equity is not automatic: the effective realization of this right depends on implementation dynamics, within which barriers to access and benefit continuity persist and tend to intensify with advancing age and vulnerability. Judicialisation emerges as a structural component of the benefit’s operation, functioning as a recurring channel for contesting administrative denials and disputing eligibility criteria and evidentiary standards, thereby contributing to unequal realization of the right. In addition, fiscal and administrative constraints—such as backlogs, fluctuations in operational capacity, and control routines—produce delays and uncertainty, potentially increasing indirect costs and litigation. It is concluded that the BPC strengthens economic security, but its capacity to promote equity depends on governance arrangements, state capacity, and the reduction of institutional frictions.
Experiências (de um) docente no ensino de língua inglesa como língua adicional: uma cartografia do aprender surdo
(Universidade Federal de São Carlos, 2026-02-03)
Palaoro Junior, Olavo
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Martins, Vanessa Regina de Oliveira
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https://lattes.cnpq.br/4768682330164550
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https://orcid.org/0000-0003-3170-293X
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https://lattes.cnpq.br/2845746767989064
This study investigates the teaching of English as an additional language to deaf students in a municipal public school with a bilingual approach, focusing on these students' perceptions of the educational encounters that constitute their learning. The research starts from the understanding that language teaching for deaf students requires the recognition of a unique experiential matrix, constituted by Libras (Brazilian Sign Language) as the structuring language of deaf subjectivity. From this perspective, English is not understood as a third language but as an additional language, learned in contrast to Libras and traversed by linguistic, cultural, cognitive, and affective dimensions specific to deaf learning. The general objective of this research is to analyze the perceptions of deaf students regarding the educational process and the encounters that constitute their learning of English as an additional language, understood as an experience of invention and production of meaning in contrast to Libras (Brazilian Sign Language). Specific objectives include discussing the philosophical concepts of matrix language and additional language in English language teaching for the deaf students, in light of the Philosophies of Difference, problematizing ways of thinking about language as experience and not as representation; analyzing, based on existing research and productions, the dilemmas, advances, and conceptions that permeate English language teaching for deaf students, highlighting the tensions, challenges, and possibilities present in bilingual educational contexts, towards a multilingual and multimodal perspective; and promoting a cartography of the processes of subjectivation that are outlined in the perceptions of deaf students regarding the encounters experienced in learning English as an additional language, considering the conceptions of bilingualism and multilingualism as a theoretical basis for understanding such experiences.. The research is grounded in the philosophy of difference, especially the thoughts of Michel Foucault, Gilles Deleuze, and Félix Guattari, mobilizing the concepts of matrix of experience, matrix language, additional language, bilingualism, and multilingualism. The methodology adopted is cartography, understood as a method of data production that follows processes in motion and is constructed in the interstices of encounters. The empirical material consists of interviews with deaf students and the educational interpreter, as well as scenes from daily school life, analyzed through the mapping of molar, molecular, and escape lines. The analysis shows that learning English, when traversed by the centrality of Libras (Brazilian Sign Language) and by pedagogical practices sensitive to visual-gestural experience, displaces hegemonic models of language teaching and reveals the power of a multilingual, multimodal, and translinguistic perspective. By giving visibility to the perceptions of deaf students, the research contributes to rethinking the teaching of English as an additional language in bilingual contexts, affirming Libras (Brazilian Sign Language) as the primary language and learning as an ethical, political, and inventive process.
Perspectiva semiótica na autobiografia: o que é isso, companheiro?
(Universidade Federal de São Carlos, 2026-02-03)
Mathias, Rafaela Reino
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Barros, Mariana Luz Pesso de
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http://lattes.cnpq.br/4830505244404566
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https://orcid.org/0000-0002-1662-2125
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http://lattes.cnpq.br/6207765511418425
This study examines the relationship between Brazilian literature and the military regime, considering literature as a key source for understanding the censored history of the dictatorship. It analyzes O que é isso, companheiro? (1996), by Fernando Gabeira, through the lens of discursive semiotics, focusing on syntactic and semantic-discursive levels to identify meaning effects. The research also draws on tensive grammar, as proposed by Jacques Fontanille and Claude Zilberberg (2001), to explore the notions of field of presence and event in autobiographical discourse.Based on Mariana Luz Pessoa de Barros (2016), particularly the concepts of the memory of the past event and the event memory, the study finds that Gabeira’s narrative primarily reconstructs lived experiences from a distanced perspective, characteristic of the memory of the past event. However, it also incorporates elements of the event memory, creating a degree of sensorial engagement that brings the reader closer to the narrated experience. The results indicate that the work articulates both documentary and experiential dimensions, functioning not only as a historical record but also as a narrative that produces effects of presence and meaning in the social sphere.
Autoagregados de lecitina e sais de bile na presença de carboximetilquitosana
(Universidade Federal de São Carlos, 2026-02-04)
Bega, Brenda da Silva
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Paula, Kelly Roberta Francisco Muruci de
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https://lattes.cnpq.br/0422652925722673
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https://orcid.org/0000-0001-6673-3280
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https://lattes.cnpq.br/7821276415930391
The modulation of self-associated systems by polymers plays a fundamental role in the development of colloidal formulations, enabling control over their rheological and structural properties. This work investigated the influence of carboxymethyl chitosan (CMQ) on systems formed by lecithin and the bile salts, sodium cholate (NaC), sodium deoxycholate (NaDC) or sodium taurodeoxycholate (NaTDC), in aqueous medium. CMQ was synthesized by three methodologies and characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The CMQ-M1 sample was selected for presenting the highest yield (52.75%), more intense bands associated with carboxymethyl groups, and higher crystallinity (55.60%). Binary bile salt/lecithin systems were prepared at 1:1 and 1:2 ratios, followed by the addition of CMQ-M1 at concentrations of 0.5, 1.0, and 2.0% (w/w). The influence of the polymer was evaluated by dynamic light scattering (DLS), zeta potential, and rheological assays. The results showed that CMQ interacts in a manner dependent on the chemical nature of the bile salt and the ratio between the components. The results demonstrated that the behavior of these systems is strongly dependent on the structural differences among the bile salts. In systems containing NaC, CMQ increased the magnitude of the zeta potential and altered aggregate size, indicating greater colloidal stability. In systems containing NaDC, it reduced the zeta potential, favoring aggregation and disruption of the viscoelastic network. In systems containing NaTDC, it resulted in high zeta potential values, structural reorganizations, and increased viscosity, especially at the 1:1 ratio, where 2% CMQ led to phase separation. Overall, the results demonstrate that CMQ is an efficient polymer for modulating the structural, rheological, and stability properties of lecithin- and bile salt-based colloidal systems. These findings indicate the potential of these systems for pharmaceutical applications, such as formulations and controlled drug delivery systems.
Digital competencies of teachers in elementary education: challenges and possibilities in the use of digital technologies
(Universidade Federal de São Carlos, 2026-02-04)
Souza Paula , Rita de Cássia de
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Furnival, Ariadne Chloe Mary
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https://lattes.cnpq.br/1291482506649810
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https://lattes.cnpq.br/0577381905919329
Objective: This article aims to identify and promote reflections on the challenges faced by elementary school teachers in the use of Digital Information and Communication Technologies (DICT) in their teaching practices. Theoretical Framework: The research is based on the investigation of teachers' digital skills, based on the European DigCompEdu framework, in line with Brazilian public policy: the Connected Education Innovation Program. Method: To this end, an exploratory-descriptive study was conducted using a mixed approach with qualitative and quantitative aspects. Snowball sampling was used to locate the research subjects, resulting in 47 teachers from the states of Minas Gerais and São Paulo who work in schools covered by the Program. Results and Discussion: The data revealed that, although there have been advances in technological integration policies, challenges and difficulties still persist, such as inadequate infrastructure, unstable connections, lack of technical support, and teacher resistance to the use of TDICs. Gaps were also identified in relation to continuing education and insecurity regarding the handling of digital resources. Research Implications: Therefore, in addition to investing in infrastructure, it is essential to expand continuing education policies planned in a way that respects the reality of teachers, encouraging innovative and critical pedagogical practices aligned with contemporary demands. Originality/Value: The more effective integration of TDICs into basic education therefore requires integrated strategies that consider the structural, technical, human, and training aspects of teaching practice.
Relação estrutura–atividade em compósitos à base de cobre: correlação entre composição e atividade bactericida
(Universidade Federal de São Carlos, 2026-02-04)
Savazi, Letícia Vieira
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Mendonça, Vagner Romito de
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https://lattes.cnpq.br/4270375873948823
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https://orcid.org/0000-0003-2300-9959
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https://lattes.cnpq.br/8518531749246881
The phenomenon of antimicrobial resistance drives research into new materials, with copper-based composites showing promise due to their low cost and multiple bactericidal mechanisms of action. This study investigated the correlation between solvothermal synthesis parameters, structural composition, and antimicrobial activity of copper-based materials. A 23 factorial design was used to evaluate the influence of monoethanolamine (MEA) concentration (0.05 and 0.075 M), temperature (120 and 150°C), and reaction time (5 and 20 h). Structural characterization was performed by X-ray diffraction with phase quantification via Rietveld refinement and by HRTEM, while morphology was analyzed by SEM-FEG and optical properties by DRS. Considering the proportional nature of the phases, the data were treated by Compositional Data Analysis, complemented by ANOVA and linear regression. The relative proportions of CuO, Cu2O, and Cu0 varied widely among the experimental conditions, with Cu2O predominating in all tests (>58.8%), while CuO and Cu0 reached maximum values of 34.6% and 33.3%, respectively. ANOVA indicated that the MEA concentration was the main factor associated with phase variation, significantly influencing the formation of CuO and Cu0; for CuO, an interaction effect between MEA and temperature was also observed, while Cu2O showed greater sensitivity to synthesis time. In the case of Cu0, both the MEA concentration and reaction time were found to have an influence. Morphological characterization revealed hierarchical microspheres consisting of nanometric aggregates. HRTEM analysis indicated lattice fringes compatible with the crystallographic planes of Cu2O and CuO, as well as domains attributed to Cu0, confirming the coexistence of the phases identified by XRD. In the biological evaluation, the bactericidal halos ranged from 0 to 2.88 mm and the bacteriostatic halos from 0 to 7.77 mm, the latter being more frequent and extensive. A moderate positive correlation was observed between CuO and bactericidal effect (ρ = 0.48) and a negative correlation with Cu0 (ρ = −0.49). The synthesis routes showed repeatability between independent series, maintaining the majority phase in all tests, and the results indicate an association between compositional variation and biological response in the investigated system.
Viabilização da Confecção de Moldes de Areia com Reaproveitamento da black dross de Alumínio
(Universidade Federal de São Carlos, 2026-02-04)
Silva, Raphael Oliveira da
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Mambrini, Giovanni Pimenta
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https://lattes.cnpq.br/7723027354150918
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https://orcid.org/0000-0001-8943-5876
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https://lattes.cnpq.br/1795568000118715
For Known for over 200 years, aluminum has dominated the industrial, metalworking, food, and aerospace markets, thanks to its remarkable structural capacity and versatility. In the automotive sector, for example, it is highly demanded for its low density and high mechanical strength, which allows for the construction of lighter chassis for electric vehicles, offsetting the weight of the batteries. However, the processes for obtaining metallic aluminum generate a significant amount of waste. While the production of primary aluminum results in a slag called white dross, the production of secondary aluminum is responsible for generating black dross. This work aimed to enable the reuse of black dross (BD) in the manufacture of molds for metal casting. Samples of BD were collected at Alux do Brasil, in partnership with Companhia Brasileira de Alumínio (CBA). These were characterized by scanning electron microscopy with energy-dispersive spectroscopy (SEM/EDS) and X-ray diffractometry (XRD). They underwent hydrometallurgical leaching processes in distilled water (ABD) or anhydrous glycerol (GBD) to dissolve NaCl and KCl salts. Percentages of ABD were incorporated into silica sand in samples named T10, T20, T25, T40, T50, and T50* in the presence of alkaline resin and pyridine catalyst. Uniaxial tensile tests were performed on the ABD samples. For field testing, a product was modeled using the 3D design software "Inventor". Next, a prototype made of acrylonitrile butadiene styrene (ABS) polymer was printed using CURA software and a 3D printer. A sand mold was made with the best condition sample, T25, into which an aluminum alloy was melted and poured. The product obtained by the silica sand mold casting process with incorporated black dross proved promising; the mold remained stable and showed good thermal and mechanical resistance to metallostatic pressure, allowing the possibility of applying this method in manufacturing processes for casting aluminum alloys.
Imune à fake news em saúde: o ensino, a formação em Enfermagem e o enfrentamento da desinformação sobre vacinas contra a COVID-19
(Universidade Federal de São Carlos, 2026-02-04)
Carvalho Junior, Juranildo Alves de
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Zuin, Antônio Álvaro Soares
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https://lattes.cnpq.br/5543562307373287
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https://orcid.org/0000-0002-6850-2897
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https://lattes.cnpq.br/3074186130931943
The COVID-19 pandemic intensified the circulation of misinformation and fake news about vaccines, posing significant challenges to public health and professional education. This study aimed to analyze how fake news related to COVID-19 vaccines are addressed in nursing education and to understand students’ perceptions of their preparedness to confront health misinformation in professional practice. This is a mixed-methods study, conducted with nursing students from a Brazilian public university. Data were collected through a structured questionnaire using Likert-scale items and semi-structured interviews. Quantitative data were analyzed using descriptive statistics, and qualitative data were examined through thematic analysis. The results indicate that students recognize the significant impact of fake news on vaccine hesitancy and express concern about the increase in preventable diseases. However, the findings also reveal that the topic is addressed in a fragmented and unsystematic manner during undergraduate education, with noticeable educational gaps and diverse teaching approaches. The study concludes that addressing vaccine-related misinformation in nursing education requires continuous pedagogical strategies that integrate theoretical foundations, health education, and risk communication, to strengthen professional autonomy and critical practice in the face of contemporary public health challenges.
Potencial das leveduras em produtos biológicos para agricultura: de promotores de crescimento vegetal a agentes de controle biológico
(Universidade Federal de São Carlos, 2026-02-05)
Alves, Isaias
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Rosa-Magri, Marcia
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https://lattes.cnpq.br/4166319985147604
In agriculture, yeasts have been increasingly studied due to their natural presence in soils and their ability to establish ecological relationships with plants. Research indicates that these microorganisms can provide several benefits to their associated plants, including the production of phytohormones, the ability of some species to solubilize minerals, the production of siderophores, and their application in the biological control of phytopathogens, among others. Despite this, the potential use of yeasts in agriculture remains less explored compared with other microbial groups. This review aimed to survey the scientific literature on yeasts, their association with plants, and the potential mechanisms involved in plant growth promotion and biological control, in order to better understand the potential of yeasts as plant growth-promoting agents and their use as bioinputs in agriculture. A systematic literature review was conducted using the PubMed, Scopus, and Web of Science databases, including studies published in English over the last 25 years. After the removal of duplicates, articles were selected through the screening of titles, abstracts, and full texts. Studies investigating yeasts isolated from soil and the rhizosphere or obtained from microbial culture collections were included, evaluating their use in plant growth promotion and/or biological control of phytopathogens. The genera Candida, Cryptococcus, Pichia, and Meyerozyma were the most frequently studied regarding plant growth-promoting potential. The studies demonstrated a direct relationship between higher indole-3-acetic acid (IAA) production by yeasts and increased development of inoculated plants, as well as a strong capacity for mineral solubilization. In addition, the studies highlighted the role of yeasts as effective biological control agents.
Síntese e caracterização de hidrogéis de celulose bacteriana da kombucha
(Universidade Federal de São Carlos, 2026-02-05)
Serpa, Evelin Thayná Barbosa
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Menezes, Aparecido Junior de
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https://lattes.cnpq.br/0484426340349483
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https://orcid.org/0000-0001-5638-489X
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Rezende, Maíra de Lourdes
The growing environmental concern has driven the use of biopolymers as sustainable alternatives to conventional materials, with bacterial cellulose (BC) standing out due to its high purity, biodegradability, biocompatibility, and absence of cytotoxicity. Unlike plantderived cellulose, its production does not require harsh processing steps, such as the removal of lignin and hemicellulose using strong acids and alkalis. Furthermore, its structure, composed of a highly hydrated nanofibrillar network, allows it to be classified as a type of hydrogel, although there are divergences in the literature regarding this definition.In this context, this study aimed to utilize waste from Kombucha production to obtain bacterial cellulose (KBC) and apply it in the production of biodegradable hydrogels. KBC production was carried out using a 2³ factorial design, evaluating sugar concentration, sugar type, and cultivation time, with membrane thickness as the response variable. The results indicated that cultivation time (21 days) was the most significant factor (89.68%), while sugar-related variables did not show a significant effect at this stage.KBC was used to produce environmentally friendly hydrogels, which were crosslinked with carboxymethylcellulose and calcium chloride (CMC/CaCl₂) and with citric acid (CA), using two approaches: defibrillated and intact structures. The KBC and hydrogel samples were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The hydrogels were also subjected to swelling tests, and their crosslinking densities were determined.FTIR and TG analyses confirmed the occurrence of crosslinking and the formation of chemical bonds, while XRD indicated the preservation of the cellulose crystalline structure. SEM images revealed that sugar concentration influences the density of the polymeric network, directly affecting swelling properties. Swelling tests and crosslinking density analysis demonstrated that water absorption behavior is directly related to the type of sugar used. The best results were obtained with demerara sugar, especially at a concentration of 10%, with swelling values of 3,900% for the citric acid-crosslinked hydrogel (HCA) and 30,000% for the CMC/CaCl₂-crosslinked hydrogel (HCMC), indicating the formation of less densely crosslinked networks with higher absorption capacity.The results demonstrate the potential of KBC and the developed hydrogels for environmental applications, particularly in wastewater treatment, heavy metal removal, and sustainable superabsorbent systems.