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Educação ambiental no ensino de Física Térmica: uma análise dos livros do PNLD 2026 à luz da BNCC
(Universidade Federal de São Carlos, 2026-07-17)
Messias, Mariana Paula Martins
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Souza, James Alves de
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http://lattes.cnpq.br/2212240621620011
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https://orcid.org/0000-0003-0112-8332
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http://lattes.cnpq.br/6114357180488505
Environmental Education is a cross-cutting theme established by Brazilian educational legislation and by the National Common Curricular Base (BNCC), requiring different fields of knowledge to contribute to students’ scientific, civic, and socioenvironmental education. In this context, Thermal Physics has considerable potential for discussing phenomena related to energy transformations, climate change, the use of fossil fuels, and energy efficiency. Accordingly, this study aimed to analyze how Thermal Physics contents presented in Physics textbooks approved by the 2026 National Textbook and Teaching Materials Program (PNLD) incorporate the principles of Environmental Education and promote contextualized and critical learning about contemporary environmental issues. The research is qualitative in nature and based on documentary analysis, adopting Bardin’s Content Analysis as its methodological framework. The corpus consisted of the textbook collections Física por Toda Parte and 360° Física, analyzed in light of the conceptual foundations of Thermal Physics, the principles of Critical Environmental Education, and the guidelines established by the BNCC and the Pedagogical Framework of the PNLD 2026. The material exploration was organized into three analytical dimensions: conceptual, didactic-pedagogical, and formative. These dimensions enabled the identification, coding, and interpretation of recording units related to content organization, conceptual accuracy, teaching strategies, the integration of Environmental Education, and the alignment with the competencies and skills established by the BNCC. The results indicate that both textbook collections have the potential to promote the integration of Thermal Physics and Environmental Education, although through different pedagogical approaches. The Física por Toda Parte collection incorporates environmental discussions more consistently throughout the development of scientific concepts, whereas 360◦ Física concentrates these discussions mainly in text boxes, supplementary texts, and contextualization activities. The analysis also identified terminological inconsistencies, particularly concerning the concept of heat, in both collections, although these occurred more frequently in Física por Toda Parte, highlighting the need for greater conceptual rigor in the development and revision of these teaching materials. It is concluded that the educational potential of textbooks depends not only on the inclusion of environmental themes but also on how these themes are integrated into conceptual development and on the critical mediation provided by teachers. In addition to answering the research question, this study demonstrates the contributions of Bardin’s Content Analysis as a methodological approach for investigating educational materials, reinforcing its relevance for initial teacher education and for the critical evaluation of resources used in Physics teaching.
Compensação de deriva térmica de encoder magnético analógico via software aplicada a compressor hermético para análise de diagrama P-V
(Universidade Federal de São Carlos, 2026-07-17)
Valvassore, Felipe Andriotti
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Araujo, Luis Antonio Oliveira
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http://lattes.cnpq.br/3639906702064630
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https://orcid.org/0000-0002-1117-0094
The construction of experimental PV diagrams is fundamental for the reliability analysis of hermetic compressors, since it enables the quantification of the work required by the process the identification of heat transfer losses, and the diagnosis of inefficiencies in the suction and discharge valves. Proper instrumentation of this system requires accurate measurements of the cylinder pressure and the shaft angular position. In this context, magnetic encoders are widely used due to their high resolution and contactless operation. Although magnetic encoders are subject to different sources of error, such as misalignment, electrical noise, and nonlinearities, as well as limitations in repeatability and reproducibility, this work focuses exclusively on thermal drift, as it is an error that can become predominant in applications subjected to large temperature variations, compromising the thermodynamic fidelity of the experimental P V diagrams. These errors arise from temperature-dependent variations in the sensor response, including changes in the signal amplitude and offset, which distort the calculated angle. This work presents a semi-empirical compensation strategy to mitigate the effects of thermal drift in analog magnetic encoders via software. The approach is based on the generation of reference curves under controlled temperature conditions, using a bivariate polynomial regression model of the shaft angle and temperature. The results demonstrate how this thermal phenomenon significantly affects the encoder measurements, particularly at elevated temperatures, leading to severe distortions in the PV diagrams. The application of the proposed method proved to be essential for measurement reliability, since thermal drift can shift the power calculation by approximately 4.25%. This level of error is critical, as it compromises the accuracy of loss segregation and energy efficiency analyses.
Prospecção e caracterização de microrganismos intestinais do coleóptero Sphenophorus levis e suas enzimas com potencial para biodegradação de poliestireno
(Universidade Federal de São Carlos, 2026-07-17)
Souza, Eduardo Pereira de
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Silva, Flávio Henrique da
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http://lattes.cnpq.br/1757309852446263
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https://orcid.org/0000-0003-3329-4597
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http://lattes.cnpq.br/0850771035889805
Polystyrene (PS) is a polymer with versatile physical and chemical properties and a low production cost, used for various purposes. Its growing demand, combined with poor waste management, leads to accumulation in the environment, triggering social and ecosystem problems. This issue is exacerbated because PS is a recalcitrant polymer due to its carbon–carbon (C–C) main chain, which makes its biodegradation in nature difficult. Studies have investigated strategies for the biodegradation of this polymer. It has been found that larvae of certain insects are capable of using PS as a carbon source, a phenomenon correlated with their gut microbiota. For this reason, the larva of Sphenophorus levis, previously observed ingesting expanded polystyrene (EPS), was used to prospect microorganisms and key genes involved in the material’s biodegradation process. The larvae were fed a diet restricted to EPS, and their intestinal microbial diversity was compared with that of larvae fed an artificial diet. It was observed that diversity decreased and the presence of its obligatory endosymbiont became more pronounced. The intestinal contents of the larvae were subjected to enrichment in a mineral medium, whose only carbon source was PS films. Five bacterial strains were isolated from the following genera: Bacillus, Lysinibacillus, Paenibacillus, Cytobacillus, and Raoultella. These were cultivated for 60 days on solid medium in contact with PS films. SEM analysis revealed cavities, cracks, and fissures in the films, and surface atom mapping indicated oxygen accumulation. FT-IR analyses indicated that only Paenibacillus sp. led to the formation of characteristic oxidation functional groups. Gel permeation chromatography indicated that the same strain was able to alter the polymer’s molar mass. To elucidate which mechanisms might be involved in this process, the entire genomes of two strains (Bacillus cereus and Paenibacillus lautus) were sequenced on the Illumina NextSeq 2000. Annotation identified proteins such as multicopper oxidases, ring-cleaving dioxygenases, cytochromes P450 (CYP), and glutathione peroxidases (GPx). CYP102 from P. lautus and the GPxs from both species were cloned and expressed in Escherichia coli. Both GPxs have thioredoxin peroxidase activity. The results demonstrate the potential of the intestinal microbiota of S. levis as a source of microorganisms and enzymes for PS biodegradation.
Estudo de viabilidade da classificação visual de danos aparentes em postes de concreto utilizando visão computacional
(Universidade Federal de São Carlos, 2026-07-17)
Seo, Leonardo Yuji
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França, Celso Aparecido de
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http://lattes.cnpq.br/4547836128892982
Traditionally, the structural condition of electrical distribution assets is assessed through field inspections and visual analyses conducted by technical teams, a process that is time-consuming and presents limitations for the overall evaluation of the electrical network. In this context, this work proposes the use of image recognition techniques associated with a trained computational model, specifically MobileNetV2, to classify images of concrete utility poles as being in good or poor condition, thereby supporting maintenance assessment. The project was implemented using the Python programming language, open-source libraries for image processing, and a computational model previously trained on the ImageNet dataset. Transfer learning was applied while keeping the layers responsible for feature extraction frozen. A dataset assembled by the author containing 150 images, equally distributed between the two classes, was used. The images were resized, normalized, and subjected to data augmentation techniques. During the evaluation of the test set, the model trained with cropped images achieved accuracies of 95% and 85% for the first and second image distributions, respectively. However, errors still occurred in the identification of poles in poor condition. Based on the results, it was concluded that the proposed approach has potential as an auxiliary inspection tool; however, it is not yet sufficiently reliable for autonomous classification. Therefore, expanding the image dataset and improving data preprocessing procedures are still necessary.
Aesthetics punk em discurso: efeitos de sentido no Instagram sob a perspectiva da Análise do Discurso Digital
(Universidade Federal de São Carlos, 2026-07-17)
Tonhatti Ciniello, Giulia
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Fernandes Araújo , Dandara Rochelly
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http://lattes.cnpq.br/3509447023315693
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https://orcid.org/0009-0006-1235-2988
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Nogueira, Luciana
Currently, "aesthetics" are considered a phenomenon in digital culture that fosters a sense of identification between individuals and visual elements. Thus, this research aims to analyze the meaning effects produced by the circulation of the "punk aesthetic" on Instagram, drawing on Digital Discourse Analysis — specifically the formulations of Marie-Anne Paveau (2021) and Cristiane Dias (2016) — while considering its modes of constitution, formulation, and circulation (Orlandi, 2001), as well as the modes of subject constitution within these spaces. To this end, concepts from Materialist Discourse Analysis and Digital Discourse Analysis are employed, including conditions of production, discursive memory, metallic memory, techno-discursive memory, and the archive, as defined by Orlandi (2015), Leandro-Ferreira (2020), and Paveau (2021). Specifically, we analyze excerpts from Instagram posts related to the punk aesthetic, seeking to understand the meaning effects produced when this aesthetic circulates as a techno-discourse. The corpus was compiled from Instagram posts and materials from the Aesthetics Wiki, a collaborative platform dedicated to cataloging and describing aesthetics. Methodologically, the research is grounded in the notion of the "excerpt" proposed by Orlandi (1984), viewing the corpus as a set of interconnected discursive materialities interpreted and analyzed through the theoretical framework of Discourse Analysis. Through this work, we hope to contribute to discussions regarding the production of meaning associated with aesthetics in digital spaces and to reflections on subject constitution within contemporary digital materialities.
Sob o sol não somos companheiros? articulações transespecíficas e de gênero a partir de concepções Tukano do sangue menstrual e da gestação
(Universidade Federal de São Carlos, 2026-07-17)
Moreira, Larissa Lombardi
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Andrello, Geraldo Luciano
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http://lattes.cnpq.br/5447074379881029
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http://lattes.cnpq.br/5593857249082706
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Oliveira, Melissa Santana de
This dissertation was developed with the aim of reflecting on the position occupied by indigenous women at the intersection of domestic and political-ritual spheres. Drawing on themes related to women’s daily activities, I sought to understand how gendered roles and knowledge are articulated to ensure the reproduction and continuity of Tukano-speaking clans in the Uaupés River region, and thereby to investigate whether the extra-human otherness activated in ritual contexts is also present in the exercise of everyday life. This investigation was conducted through a cross-referenced literature review of two sets of works: the ethnographies by Christine Hugh-Jones (1979), Dany Mahecha (2004), and Melissa de Oliveira (2016); and the articles by Geraldo Andrello and João Vianna (2022), Pedro Lolli and Geraldo Andrello (2024), and Geraldo Andrello and Luiz Nascimento (2024), whose formulations were examined in light of the discussions developed by the first three authors and in conjunction with the large-scale comparative work of Luisa Elvira Belaunde (2005). The broader arguments put forward by these authors—briefly introduced in the opening chapter—are explored in depth in chapters two, three, four, and five, which, in that order, consist of reviews of the ethnographies by Christine Hugh-Jones (1979), Dany Mahecha (2004), and Melissa de Oliveira (2016), as well as analyses of issues and hypotheses related to the topic. This approach prompted me to consider the role of the placenta and breastfeeding within the described interweaving and, thus, to examine the issue of women’s participation in the collective reproductive process from other perspectives.
Construção e evidências iniciais de validade de conteúdo de instrumento de avaliação da experiência do paciente cirúrgico
(Universidade Federal de São Carlos, 2026-07-17)
Laurenti, Thaís Cristina
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Mascarenhas, Silvia Helena Zem
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http://lattes.cnpq.br/0185144417072417
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https://orcid.org/0000-0001-7753-6725
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http://lattes.cnpq.br/9862214160954461
Objective: To develop an instrument for assessing surgical patient experience and obtain initial evidence of content validity. Method: A methodological study with a quantitative approach, conducted in the following stages: establishment of the conceptual framework, instrument development, content evaluation by expert judges, and pretesting. The conceptual framework was based on a scoping review conducted according to the recommendations of the Joanna Briggs Institute and on the analysis of international instruments. The review identified 2,920 records; after removing 1,398 duplicates, 1,522 records underwent screening, 136 were assessed in full text, and 104 studies comprised the final sample. The synthesis of evidence supported the definition of six dimensions and the development of an initial set of 30 items. Content evaluation was performed by eight expert judges using the Item-Level Content Validity Index (I-CVI) and the mean CVI of the dimensions. Pretesting was conducted with 21 patients who underwent elective surgical procedures. Results: Following expert evaluation, the instrument was refined to 33 items distributed across the following dimensions: Communication, Patient-Centered Care, Perioperative Journey, Perceived Safety of Care, Quality of Care, and Overall Experience. Mean CVI values across the dimensions ranged from 0.82 to 1.00 for clarity, 0.95 to 1.00 for relevance, and 0.95 to 1.00 for pertinence. During pretesting, 90.5% of participants rated the instrument as excellent, 9.5% as good, and 100% stated that they would recommend its use. Conclusion: The instrument, comprising 33 items distributed across six dimensions, demonstrated favorable initial evidence of content validity and adequate comprehension by the target population. Further studies are needed to evaluate additional measurement properties.
Attractors for a class of autonomous wave equations of the Klein-Gordon-Zakharov type
(Universidade Federal de São Carlos, 2026-07-17)
Accarini, Luíza Gomes
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Bonotto, Everaldo de Mello
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Rosado, José Antonio Langa
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http://lattes.cnpq.br/2183693074268993
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https://orcid.org/0000-0002-8765-0764
This work investigates the long-time dynamics of an autonomous coupled Klein-Gordon-Zakharov type wave system defined on a bounded smooth domain in Rn, for n ≥ 3. We establish global well-posedness of solutions in a suitable phase space by employing semigroup theory and we proceed to derive the dissipative properties required in order to construct the associated dynamical system. The asymptotic behavior is then analyzed in detail. We prove the existence of a global attractor, we study some properties for it, such as regularity and upper semicontinuity, and we show that it possesses finite fractal dimension. We also construct exponential attractors for the semigroup generated by the wave system through two different approaches.
Arquitetura genética do holobionte Nelore (Bos indicus): implicações em fenótipos de desempenho e de temperamento
(Universidade Federal de São Carlos, 2026-07-17)
Rojas, Liz Jiannine Fuentes
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Lourenço, Daniela Andressa Lino
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http://lattes.cnpq.br/6181548260327124
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https://orcid.org/0000-0003-3140-1002
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Regitano, Luciana Correia de Almeida
Beef cattle production is one of the main pillars of Brazilian agribusiness, with emphasis on the Nelore breed (Bos indicus), which is widely adapted to tropical conditions. Despite advances in genetic improvement, productive and temperament traits exhibit low to moderate heritability, indicating that the phenotypic variation of these traits is not fully explained by host genetics. In this context, the gastrointestinal microbiota has been recognized as an important modulator of metabolism, feed efficiency, productive performance, and behavior-related traits in ruminants. The interaction between host genetics and the microbiome constitutes a relevant component in the expression of complex phenotypes, with microbiability being used as a complementary measure to genetic heritability. However, its application in beef cattle, particularly in Nelore populations, remains limited. Thus, this thesis aimed to investigate host-microbiome interactions in Nelore cattle, evaluating the influence of host genetics on the fecal microbiota and its associations with performance and temperament traits in young bulls. For this purpose, 16S rRNA gene sequencing was performed for taxonomic characterization of the fecal microbiota, integrated with host genomic information. Associations between microbial features and performance traits were evaluated using linear mixed models, whereas host-microbiome interactions were investigated using genomic linear mixed models and hierarchical Bayesian models to estimate the heritability of microbial features, identify host genetic variants through genome-wide association studies (GWAS), estimate heritability and microbiability of performance and temperament traits, and evaluate genetic and microbial correlations. Significant associations were identified between elements of microbial composition and phenotypes, including ribeye area, metabolic weight, and EPMURAS, highlighting the role of the microbiota in animal performance. Additionally, a portion of microbial abundance features exhibited measurable heritability, with the identification of genetic variants associated with the microbiota and candidate genes potentially involved in host-microbiome interactions. Heritability estimates were moderate to high, indicating a strong influence of host genetics on the evaluated phenotypes. In contrast, microbiability showed low magnitudes, although with a relatively higher contribution to some traits related to feed intake, morphology, fat deposition, and temperament. Furthermore, the microbiota influenced associations among temperament phenotypes, showing correlation patterns distinct from those observed for host genetic effects. Overall, the results obtained enhance the understanding of interactions between host genetics and the microbiome in beef cattle, indicating that the microbiota may act as a complementary component of phenotypic variation and be incorporated into genomic evaluation models, contributing to more efficient and sustainable genetic improvement strategies.
Desenvolvimento profissional de professoras que ensinam matemática nos anos iniciais: trajetórias, crenças e desafios da prática docente
(Universidade Federal de São Carlos, 2026-07-17)
Lopes, Antônio Martins
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Passos, Carmen Lucia Brancaglion
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http://lattes.cnpq.br/2297203444364327
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https://orcid.org/0000-0002-5501-3584
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http://lattes.cnpq.br/1620285745257222
This qualitative research study draws on a collaborative and interpretive perspective, articulating teacher education processes, knowledge production, and teacher professional development to understand the factors that influence the professional growth of female teachers who teach Mathematics in the early years of Elementary Education. In this context, the research was guided by the following question: how does the professional development of female teachers who teach Mathematics in the early years of Elementary Education take shape within a shared teacher education group, considering their formative trajectories and the reflective and collaborative processes produced within it? Data were produced through narrative interviews conducted with the participants and eleven Shared Professional Development Meetings, held between November 2023 and July 2024, at a public school located in a city in the interior of Minas Gerais. The formative meetings were organized based on demands presented by the teachers themselves and addressed topics related to the teaching of Mathematics in the early years of Elementary Education, such as the Decimal Number System, Problem Solving, Geometry, the use of Digital Information and Communication Technologies (DICTs), and pedagogical planning. The research sought to understand the factors that influence the professional development of the female teachers and to analyze the reflective processes produced in the context of shared teacher education. The study is grounded, among other authors, in Marcelo García (2009; 2011), Nóvoa (1992a, 1992c), Tardif (2011), Zeichner (1993), Gatti and Barreto (2009), Passos and Nacarato (2018), Cyrino and Grando (2022), and Pereira and Anunciato (2023), in addition to engaging in dialogue with normative documents related to teacher education in the Brazilian context. Data analysis made it possible to identify three axes that influence the professional development of the participants: (1) the constitution of professional development in the teachers’ narratives; (2) the process of reflection and collaboration in the shared professional development meetings; and (3) the voice of school management regarding teacher professional development: tensions and possibilities. In addition, it showed that the shared professional development meetings constituted spaces for dialogue, reflection, and exchange of experiences regarding the teaching of Mathematics, favoring the explicit articulation of beliefs, conceptions, and challenges related to teaching practice. The results demonstrate that teacher professional development constitutes a complex process, marked by the articulation between personal experiences, formative trajectories, family support, working conditions, and opportunities for reflection on practice. The shared teacher education meetings favored the problematization of experiences, the circulation of professional knowledge, and reflection on the teaching of Mathematics, although they were also intersected by institutional challenges and the concrete conditions of teaching work. Therefore, the thesis is that the professional development of female teachers who teach Mathematics in the early years of Elementary Education is constituted progressively through the articulation between personal and professional trajectories, formative trajectories, working conditions, institutional support, and opportunities for reflection and collaboration, with shared teacher education playing an important role in the problematization of practice and the production of professional knowledge. It is concluded that contextualized formative processes, constructed based on teachers' demands and supported by consistent theoretical frameworks, may foster the professional development of female teachers who teach Mathematics in the early years of Elementary Education.
Influência da vigilância ativa dos contatos na cascata de cuidado da tuberculose latente
(Universidade Federal de São Carlos, 2026-07-17)
Nunes, Tatiana Santos Malheiros
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Souto, Bernardino Geraldo Alves
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http://lattes.cnpq.br/7264826508407685
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https://orcid.org/0000-0003-4083-3050
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http://lattes.cnpq.br/3937279423127168
Eliminating tuberculosis as a public health problem is necessary and possible, but it has faced operational and other challenges in healthcare services and public policies. One of the strategies to eliminate the disease, which currently has low coverage in the city of Teresina-PI, is the treatment of Latent M. tuberculosis Infection (LTBI). To help with this, an alternative model for monitoring and tracking the Latent Tuberculosis Care Cascade (LTCC) was proposed and tested, aiming to increase healthcare coverage for LTBI. Through a longitudinal intervention study, a controlled, paired, and randomized operational trial was conducted. Fifty-two contacts of laboratory-confirmed bacilliferous tuberculosis cases from 11 Primary Health Care Units (PHUs) in Teresina - Piauí were followed using this alternative model, which consisted of standardized guidance recorded in the Citizen’s Electronic Health Record (PEC) in real time for each of the steps of CCTL. In 11 other UBS in the same health region, the conventional surveillance model was maintained over 27 contacts. In the 22 UBS, demographic data of these contacts and a set of care coverage indicators at each step of CCTL were collected. The indicators collected in the group of UBS where the new surveillance strategy was applied were statistically compared to the same indicators in the group of UBS where the conventional model was maintained. Of the total people studied, most were female and of black race/color. The average age was 33.5 years. The proportion of contacts who had a chest X-ray, who took the 1st tuberculin test and the 2nd tuberculin test when indicated, who were fully examined and who started preventive tuberculosis treatment was higher in the UBS where the alternative active CCTL surveillance model was applied. A statistically significant difference (p < 0.05) was reached in the indicators: proportion of contacts who underwent chest X-ray, who undergo the 2nd tuberculin test when indicated, and the proportion of contacts fully examined. This result showed that the tested model is effective in helping fight tuberculosis because it significantly increases healthcare coverage for latent TB infection.
Utilização de transfer learning em redes neurais convolucionais: Identificação de Alzheimer em imagens de ressonância magnética
(Universidade Federal de São Carlos, 2026-07-21)
Kummer, Luís Henrique Nagamatsu
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França, Celso Aparecido de
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http://lattes.cnpq.br/4547836128892982
The Alzheimer’s Disease is the main cause of dementia in the world and due to it not having a cure, the treatment must be started as soon as possible to minimize the symptoms The objective of this paper is to apply transfer learning techniques to a convolutional neural network (CNN), aiming to identify dementia patterns in Magnetic Resonance Imaging and assist in Alzheimer’s Disease diagnotics. Applying the network can help the clinical decision making, by reducing false negatives of anomalies that might not be noticed at first. The model was developed using VGG19 as base and Python libraries such as Tensorflow and Augmentor. The model reached an accuracy of 98.44% on the validation.
Engenharia de nanoestruturas de óxido de cobre via plasma não térmico para redução eletroquímica de CO2
(Universidade Federal de São Carlos, 2026-07-24)
Mestriner, Eloá Rodrigues
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Mascaro, Lucia Helena
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http://lattes.cnpq.br/9130022476352844
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https://lattes.cnpq.br/8219299536584388
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Souza, Fernanda de Lourdes
ENGINEERING OF COPPER OXIDE NANOSTRUCTURES VIA NON-THERMAL PLASMA FOR THE ELECTROCHEMICAL REDUCTION OF CO2 investigated the development and optimization of nanostructured electrocatalysts based on copper and CuOx/ZnO, employing defect engineering and structural modification via radio-frequency non-thermal plasma, while evaluating the impact of different gaseous atmospheres. The results demonstrate that post-synthesis modifications on CuOx over metallic mesh optimized the catalytic interface and favored the formation of C2+ products, achieving Faradaic efficiencies (FE) greater than 70%. However, these modulations were limited to the catalyst surface, proving ineffective for suppressing the hydrogen evolution reaction and for the robust propagation of carbon chains. The application of non-thermal plasma treatment prior to the anodization step induced profound structural modifications that extended to the material's bulk, creating preferential nucleation sites. This resulted in a decrease in hydrogen formation rates (FE≤ 25%) and directed C-C coupling routes depending on the gaseous atmosphere. Thus, N2 plasma favored selectivity for n-propanol (FE= 14%), while CO2 plasma stabilized ketones (FE= 7%) and conferred notable integrity to the film. The methodological expansion to CuO/ZnO heterostructures proved that CO2 plasma acts beyond oxidation, serving as an efficient promoter of atomic diffusion and structural consolidation. The controlled incorporation of zinc induced electronic modulation, increasing the electrochemically active surface area, significantly suppressing hydrogen reduction (FE = 11%), favoring the alcohol formation route, primarily ethanol (FE ≥ 25%). Adjusting the plasma exposure time allowed for switching the predominant selectivity between C3 and C2 products. In summary, this work establishes that the synergy between the choice of support, controlled bimetallic integration, and defect induction via non-thermal plasma represents a robust and innovative approach for the rational design of selective catalysts.
Avaliação preliminar da produção de etanol a partir de farinha de milho por levedura termotolerante
(Universidade Federal de São Carlos, 2026-07-24)
Anjos de Mendonça, Júlio Augusto
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Andrade Lemos, Diego
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http://lattes.cnpq.br/1174905383146257
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Colli Badino Junior, Alberto
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http://lattes.cnpq.br/6244428434217018
The Brazilian industry of sugar-based energy has, over the last several years, experienced a surge in the diversity of its biomass sources with the rise of corn-based ethanol, most noticeably in the central-west region of the country. However, production of ethanol in Brazil is not without its challenges, as maintaining fermentation vats within an optimal temperature range proves to be particularly difficult when they carry out an exothermic reaction in a tropical climate prone to heat waves and strong summer seasons. The present study has been carried out with the purpose of assessing the viability of utilizing the thermotolerant yeast strain Saccharomyces cerevisiae LBGA-01 in the production of corn-based ethanol and potentially enabling an industrial-scale process which operates at a more doable temperature range. The experiment has been conducted at bench-scale, using corn flour with a starch content of 66% m.m-1 and started off with sequential hydrolysis and fermentation (SHF) processes at 36 and 38 °C and initial glucose concentrations of 100 and 200 g.L⁻¹. The conditions of assay SHF-200-38 were chosen for the following fermentations for its high efficiency value of 94.5%, and thus the reaction’s kinetics were mathematically modeled based on the Andrews-Levenspiel kinetic model. The saccharification step at 38 °C was modeled after the Michaelis-Menten model with product-driven inhibition, obtaining a residual standard deviation value of 4.13%. Based on the approximated parameters, a simulation of the simultaneous saccharification and fermentation (SSF) assay was performed, and the reaction was carried out at 38 °C with concentrations of glucose and starch equivalent to 183 g.L⁻¹ glucose. The SSF assay reached a final concentration of 92.29 g.L⁻¹ ethanol and efficiency of 94.62%, with a glucose depletion time of 34 h, shorter than the 36 h it took for depletion in the SHF assay and in literature-reported experiments. The mathematical modeling of the SSF assay revealed that the model that best represented the process was that of Levenspiel (no inhibition by substrate), pointing to there not being any significant amount of inhibition by glucose in the concentration range of the conducted SSF. The LBGA-01 strain proved to be capable of withstanding and thriving at such a high temperature as 38 °C, promising for an industrial process with simpler and cheaper heat-exchanging needs.
A Kallipolis de Platão: entre a episteme do bem e as imagens poéticas
(Universidade Federal de São Carlos, 2026-07-24)
Santos, Mateus Lima dos
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Bolzani Filho, Roberto
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http://lattes.cnpq.br/2799608595434302
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Souza, Eliane Christina de
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http://lattes.cnpq.br/5658382257368048
Cette thèse fait face à un problème concernant la réflexion politique de Platon dans La République. Bien que la Kallipolis soit décrite comme une cité imaginée en paroles, c’est-à-dire une image, le dialogue propose que, une fois inaugurée, elle devrait expulser les producteurs d’images. L’argument contre la production imagière est construit autour d’une double accusation, à savoir : les produits de la mimèsis seraient inutiles et dangereux. Inutiles parce que les imitateurs ne suivraient pas les prescriptions d’un utilisateur qui détient l’épistémè ; dangereux parce qu’ils pourraient renforcer la partie irascible de l’âme. Cette thèse vise à dévoiler l’aspect politique de cette accusation qui est soutenue par une hiérarchie entre les savoirs dont le sommet est l’épistémè du bien et, ensuite, à défendre le caractère polysémique de l’image. Si, d’un côté, elle peut être dangereuse entre les mains de ceux dont la plus grande préoccupation est le plaisir du public, de l’autre, elle peut être utilisée comme un instrument pour diagnostiquer le mauvais état d’un corps politique. Dans ce cas, les images sont les moyens par lesquels on espère atteindre la guérison d’une cité malade.
Raw bioaccumulation and hematological biomarker data from the estuarine fish Centropomus parallelus following SePM exposure - FAPESP Proc 2019/08491-0
(Universidade Federal de São Carlos, 2026-07-24)
Maraschi, Anieli Cristina
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Monteiro, Diana Amaral
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http://lattes.cnpq.br/5896110724916724
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http://lattes.cnpq.br/0358411551730768
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https://orcid.org/0000-0001-8653-9709
Dados sobre revistas indexadas no Portal de Periódicos da UFSCar
(Universidade Federal de São Carlos, 2026-07-27)
Klein, Luiza
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Zafalon, Zaira Regina
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Fernandes, Ana Quintina de Oliveira
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http://lattes.cnpq.br/6178789718503394
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http://lattes.cnpq.br/1584935790390793
Processamento ultrarrápido do eletrólito sólido Na₃Zr₂Si₂PO₁₂ pela técnica de reactive flash sintering
(Universidade Federal de São Carlos, 2026-07-28)
Campos, Leonardo Jesus de
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Jesus , Lilian Menezes de
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http://lattes.cnpq.br/1731168664454710
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https://orcid.org/0000-0002-6265-5542
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Rodrigues, Ana Candida Martins
Solid-state sodium batteries have attracted increasing interest due to the abundance and low production cost of sodium, as well as the potential for improved safety compared to batteries employing flammable liquid electrolytes. Among the most promising solid electrolytes is Na3Zr2Si2PO12 (NZSP), a member of the NaSICON family, which exhibits high ionic conductivity. However, its conventional processing requires calcination and sintering steps at high temperatures and long dwell times, promoting sodium and phosphorus volatilization and increasing energy consumption. In this work, Reactive Flash Sintering (RFS) was investigated as an alternative route to promote both NaSICON phase formation and densification of NZSP in a single processing step. The effects of the maximum applied power, dwell time, and power ramp rate on phase formation, microstructure, and electrical properties were systematically evaluated. The results demonstrated that the processing condition of 150 mW mm-3, combined with a power ramp rate of 30 mW mm-3 min-1 and a dwell time of 15 min, enabled the production of samples with a relative density of approximately 96%, a total ionic conductivity of 1.14 ± 0.11 mS cm-1, and an activation energy of 0.30 ± 0.01 eV. In comparison, conventionally processed samples exhibited lower conductivity (0.75 ± 0.02 mS cm-1) and higher activation energy (0.35 ± 0.01 eV). The use of sacrificial powder during conventional sintering, aiming to reduce the loss of volatiles, such as sodium or phosphorus, at high temperatures, increased the conductivity to values comparable to those obtained by RFS, indicating that the main advantage of the electric field-assisted process is associated with the reduction of volatile species losses during processing. The results demonstrate, for the first time, the feasibility of producing NZSP electrolytes by Reactive Flash Sintering directly from unreacted precursor powders, highlighting the potential of this technique as a rapid and energy-efficient route for the fabrication of solid electrolytes.
Mudanças no uso e cobertura do solo e seus impactos na erosão hídrica e no potencial natural de erosão na sub-bacia do córrego Santa Maria do Leme
(Universidade Federal de São Carlos, 2026-07-29)
Landgraf, Isabely Sanches
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Araujo, Mélory Maria Fernandes de
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http://lattes.cnpq.br/8882512834751864
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Santos, Franciane Mendonça
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http://lattes.cnpq.br/5344692835119505
This study analyzed water erosion susceptibility and Natural Erosion Potential (NEP) in the Santa Maria do Leme Stream watershed, located in São Carlos, São Paulo, Brazil, considering land use and land cover changes between 2014 and 2024. The research aimed to evaluate soil loss potential through the application of the Revised Universal Soil Loss Equation (RUSLE), combined with geoprocessing techniques, temporal land use analysis, and assessment of Permanent Preservation Areas (PPAs). Environmental and geospatial data were used, including a Digital Elevation Model generated from ALOS/PALSAR satellite data, pedological information from IBGE, climatic data from INMET, and land use and land cover maps from the MapBiomas platform. Based on these data, the RUSLE factors were estimated: rainfall erosivity, soil erodibility, relief, cover and management, and conservation practices. PPAs were also delimited according to the Brazilian Forest Code, considering 30-meter buffers for watercourses and 50-meter buffers for springs. The results showed significant land use changes over the analyzed decade, with the expansion of urbanized areas and mixed-use mosaics to the detriment of pasture areas and sugarcane cultivation. The RUSLE factors indicated that water erosion in the watershed is strongly associated with anthropogenic changes, especially the reduction of vegetation cover and the expansion of more intensive land uses. The generated maps indicated a predominance of soil losses classified as slight to moderate, with punctual occurrences of areas classified as moderate to high susceptibility. In contrast, the NEP results remained relatively stable between 2014 and 2024, with a predominance of the very low class, demonstrating that natural factors alone do not represent high erosive fragility in the watershed. In PPAs, the low NEP and soil loss values reinforced the importance of vegetation in soil protection, reduction of surface runoff, and conservation of water resources. Therefore, the integration of geotechnologies, temporal analysis, and environmental modeling through RUSLE proved to be efficient for identifying areas susceptible to water erosion and supporting environmental planning, territorial management, and PPA conservation actions.
Resposta autonômica cardíaca durante e após exercício máximo é preservada em adultos jovens fisicamente ativos com COVID longa
(Universidade Federal de São Carlos, 2026-07-29)
Lima, Marco Antonio de
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Pereira, Guilherme Borges
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http://lattes.cnpq.br/0159911069166581
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https://orcid.org/0000-0002-5295-6229
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http://lattes.cnpq.br/2444405525040960
Long COVID (LC) is a condition that generally manifests within three months after acute SARS-CoV-2 infection, with symptoms persisting for at least two months and without an alternative diagnostic explanation. Evidence suggests that alterations in the autonomic nervous system (ANS) may contribute to manifestations such as fatigue, palpitations, exercise intolerance, and post-exertional malaise. Heart Rate Variability (HRV) is a widely used non-invasive method for assessing autonomic modulation and its responses to the physical stress imposed by cardiopulmonary exercise testing (CPET). The present study aimed to investigate the autonomic response of individuals with LC during and after CPET using linear and nonlinear HRV analyses, comparing them with a control group (CON) previously infected with SARS-CoV-2 but without persistent symptoms. Thirty-eight physically active young adults aged 18 to 40 years participated in the study: 18 with LC and 20 previously infected controls without persistent symptoms. Analyses were performed at nine time points: rest, peak exercise, immediately after exercise, and at 3, 5, 10, 30, and 60 minutes and 24 hours after the test. This was an observational study with continuous recording of RR intervals using a heart rate monitor, followed by processing in Kubios HRV software. CPET was performed on a treadmill using the Bruce protocol. Analyses were conducted in RStudio (p < 0.05). After filtering the RR intervals (>95% normal beats), linear and nonlinear HRV metrics were extracted at the nine time points. Normality and homogeneity were assessed using the Shapiro-Wilk and Levene tests. Between-group comparisons were performed using Student's t-test or the Mann-Whitney test, according to data distribution. For analyses over time, three-way ANOVA was applied, followed by post hoc comparisons with Tukey adjustment or false discovery rate (FDR) control. Kaplan-Meier curves were used to estimate the time to autonomic recovery, and the log-rank test was used to compare groups. Associations between age and pNN50 were assessed using Pearson's or Spearman's correlation. The discriminative accuracy of the metrics was investigated using ROC curves and AUC comparisons according to the DeLong method. The hypothesis was that the LC group would exhibit greater vagal withdrawal at peak exercise and slower parasympathetic reactivation. No consistent overall differences were observed between the LC and CON groups for most metrics, with only isolated variations across subgroups and sexes. The findings did not support the hypothesis of autonomic impairment associated with LC in this sample, suggesting that potential effects may be subtle, compensated for by physical fitness, or not detectable by the metrics used. These findings provide data for future investigations and rehabilitation strategies.