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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.
O ensino do atletismo na educação infantil: as contribuições dos jogos e das brincadeiras para o desenvolvimento infantil
(Universidade Federal de São Carlos, 2026-02-05)
Cruz, Osvaldo de Jesus
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Godoi Jacomassi, Daniela
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https://lattes.cnpq.br/7699007812483790
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https://lattes.cnpq.br/2864291711221950
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https://orcid.org/0009-0003-5050-6149
Athletics is a sport that can greatly support children’s development due to its ability to stimulate different motor skills and to convey learning that goes beyond the motor domain, encompassing social, behavioral, and other aspects. In school Physical Education, sports are typically taught only in the years of elementary education, and athletics is generally not a popular sport among students. In Early Childhood Education, children should have opportunities to experience different situations outlined in the Fields of Experience established by the BNCC, with Physical Education addressing themes related to the culture of movement in a playful way, aiming to support child development through games and play activities. Play is fundamental for children, as it is through play that they interact with peers and their environment; it is by playing that they can express feelings and sensations, overcome challenges, and communicate more effectively. Given the difficulty of relating Physical Education curricular content—especially from the perspective of sports teaching—to the Fields of Experience proposed for Early Childhood Education, this study aimed to analyze the process of designing and implementing a didactic unit addressing elements of athletics through games and play in Early Childhood Physical Education classes. This is a qualitative study conducted with five-year-old children from a Municipal Early Childhood School (EMEI) in the city of Ribeirão Preto, in the state of São Paulo, Brazil. Data collection was carried out through video recordings, a teaching journal, and drawings produced by children. The results showed that the process of designing the didactic unit was dynamic, involving adjustments and reorganization throughout its implementation, which led to an increase in the number of sessions, resulting in a final structure of eight sessions. Regarding its implementation, the didactic unit proved appropriate to the children’s developmental level, allowing them to understand and experience the activities in a playful and safe manner. We conclude that games and play represent a powerful pedagogical strategy for teaching athletics in Early Childhood Education. Teaching athletics to this age group proved relevant, as it enabled the integration of different Fields of Experience and contributed to children’s motor, cognitive, and socio-emotional development, in alignment with the BNCC. As an educational resource, a mini didactic guide on athletics for Early Childhood Education, especially for five-year-old children—was developed based on the experiences of the participating children, with the aim of supporting teaching practice and promoting holistic development.
Efeito do pH, tempo e adição de nanocelulose sobre sistemas aquosos binários e ternários de sais de bile
(Universidade Federal de São Carlos, 2026-02-05)
Tartare, Vinícius Augusto Peixoto
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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/1118587537223836
This work evaluated how self-aggregated systems of the bile salts sodium deoxycholate (NaDC), sodium taurodeoxycholate (NaTDC), and sodium cholate (NaC), in aqueous medium, are affected by time, pH variations, the ratio between the bile salts, and the addition of nanocellulose. The rheological properties of aqueous binary NaDC:NaTDC systems showed changes as a function of time and the addition of nanocellulose. Control systems containing bile salts formed hydrogels only twelve weeks after preparation, while systems containing cellulose nanofibrils (CNFs) formed stronger hydrogels one week after preparation (G'⁄G" = 1.709 for the control system and 10.178 for the system containing CNFs). Binary and ternary aqueous systems of NaDC, NaTDC, and NaC showed changes in their colloidal stability and rheological properties as a function of pH variation. Systems containing NaDC and NaC formed precipitates in acidic medium. At pH 5, the systems showed greater viscoelasticity compared to the systems at pH 10, as evidenced by the formation of stronger and more intertwined hydrogels for the 100:50 mM NaDC:NaC aqueous system containing CNFs in acidic medium (G'⁄G" = 11.592 with G0 = 3679) compared to the systems prepared in basic medium (G'⁄G" = 0.62605 with G0 = 0.12119). SAXS analyses suggested the formation of mixed structures of cylindrical aggregates and spheres for the NaDC:NaTDC systems, in addition to indicating the formation of anisotropic structures in acidic medium and isotropic structures in basic medium. The data obtained in this work contributed to a better understanding of the phenomena and structures obtained from the modulation of bile salt self-aggregates, enabling advances in the formulation of tunable colloids for applications such as modified drug delivery platforms.
Sertão em festa: do narrador em travessia
(Universidade Federal de São Carlos, 2026-02-05)
Nunes, Marília Marques
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Souza, Geraldo Tadeu
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https://lattes.cnpq.br/3516168011612531
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https://orcid.org/0000-0002-1352-0027
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Silva, Vanda Aparecida da
This dissertation reflects on the human condition starting from the sertão of João Guimarães Rosa, revisiting memories submerged in veredas and entering the cerrado through the work Corpo de Baile. This study analyzes the relationship between festivity in the literature of the writer João Guimarães Rosa, in the novella Uma estória de amor (Festa de Manuelzão), and festivity in O Caminho do Sertão, a socio-eco-literary immersion. This event takes place in the valleys of the Urucuia and Carinhanha rivers, the creative universe of the Minas Gerais writer, beginning in 2014 and encompassing the geographical territory located in part of northwestern Minas Gerais, along the border with the states of Bahia and Goiás. The specific objectives are: 1) To understand the relationships between the literature of Guimarães Rosa and the event O Caminho do Sertão in a cartography of the territory; 2) To analyze the theme of festivity in the novella Uma estória de amor (Festa de Manuelzão); and 3) To analyze the theme of festivity in O Caminho do Sertão. Based on the concepts of “experience” and “narrator” (Benjamin, 1994), we look at the territory of the Rosian sertão in order to understand what underpins the experiences of traditional peoples (Kopenawa, 2015; Krenak, 2020; Santos, 2023), observing the importance of festivities, movement, and the body in the territory (Martins, 2023; Miranda, 2023). We therefore brought into this reflection the festivities, the narratives of the people who live in the territory, as well as the experience of the researcher as a walker and observer of this crossing of O Caminho do Sertão. We seek to understand the characters and the people of the sertão from within, who live in the in-between, a geography of crossroads that lies between reality and literature, between Bahia, Minas Gerais, and Goiás, between agribusiness and the cerrado, between lived and celebrated life and the crushing superstructure of capitalism. The research revealed the learning process through the experience of the researcher-walker, at the same time that it brought an understanding of the processes of struggle of the people of the Rosian sertão against the exploitation of agribusiness. The struggle and resistance of the people who live in this territory necessarily pass through festivity.
Atravessamentos étnico-raciais na atuação de terapeutas ocupacionais em centros de atenção psicossocial da cidade de Salvador
(Universidade Federal de São Carlos, 2026-02-05)
Cruz, Tiago Dias
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Ricci, Éllen Cristina
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https://lattes.cnpq.br/2306373037361143
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https://lattes.cnpq.br/5541078052133738
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https://orcid.org/0000-0002-3429-6749
This study examines ethnic-racial relations at the intersection of Occupational Therapy and mental health, understanding racism as a historical social structure that produces psychological suffering among Black people in Brazil and affects access to, continuity of, and quality of care in public services. Despite struggles and resistance, its effects persist in people’s everyday lives, as well as across territories and institutions. As a field committed to ways of living, Occupational Therapy calls for a critical, anti-racist stance, particularly in mental health care. The study analyzes how ethnic-racial issues and their unfolding shape the practice of occupational therapists working in Psychosocial Care Centers (CAPS) in Salvador, Bahia. This is a qualitative, descriptive, exploratory study guided by a critical and decolonial perspective, involving 14 occupational therapists from different CAPS modalities, each with at least one year of experience in the service. Data were produced through semi-structured interviews, mostly conducted remotely, audio-recorded with authorization, fully transcribed, and complemented by field notes. The analysis followed Content Analysis, resulting in four analytical categories: (1) Racism, territory, and intersectionalities as the structure of care; (2) Between silence, recognition, and action: movements of racial awareness in professional practice; (3) Professional education and institutional structures: between gaps, tensions, and (im)possibilities; and (4) Quilombamento and Afro-referenced practices as strategies of care and resistance. The findings show that racism, territory, and intersectionalities permeate the organization of care and shape possibilities for mobility, protection, and life projects. They also indicate that the racial dimension fluctuates between silencing, partial recognition, and isolated actions. In addition, gaps in professional training and institutional barriers impose limits on mainstreaming racial issues in everyday service practices. Finally, Afro-referenced practices and quilombamento movements emerge as ways of producing belonging, protection, and care in Black territories. The study concludes that sustaining racial issues as a cross-cutting dimension within the Brazilian Unified Health System (SUS) and the Psychosocial Care Network (RAPS) requires ethical-political shifts in Occupational Therapy, including confronting institutional racism, strengthening the language and documentation of care, and consolidating anti-racist practices as an ongoing service policy. The study contributes to improving public policies and Occupational Therapy education, supporting ethical, anti-racist, and equity-oriented care in the field of mental health.
A mediação de leitura do livro-imagem e o brincar literário
(Universidade Federal de São Carlos, 2026-02-05)
Maciel, Monisa
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Lombardi, Lucia Maria Salgado dos Santos
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https://lattes.cnpq.br/5697508831302188
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https://lattes.cnpq.br/8111246537173225
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Feltre, Camila
This research aims to investigate how the mediation of picture book reading, carried out by the pedagogue, can generate the proposition of playful activities with children, understood as pedagogical developments of the mediation experience. The specific objectives are: to gather theoretical references on picture books and reading mediation; to analyze the experiences of picture book reading mediation carried out by the researcher herself in the school context; to investigate how the mediations carried out enable the emergence of playful activities as pedagogical developments of picture book reading; and to reflect on the role of the educator as a mediator of picture book reading and proposer of play activities, considering the aesthetic, symbolic, bodily, and affective dimensions of the children's experience. The research question is "How can the mediation of picture books by educators generate the proposition of playful/engaging activities with children as a pedagogical unfolding of the mediation?". To answer this, the methodology consisted of a bibliographic review of the State of Knowledge and an (auto)biographical approach. The results show that image reading requires specific attention in the training of readers and that the mediation of picture books, carried out in a contextualized and critical way, constitutes a fundamental dimension of visual literacy. The research points to the importance of guaranteeing children's access to picture books as a way to expand and qualify their visual repertoire, as well as the need for the educator's reading training to consistently include the mediation of image reading. It is also evident that reading mediation is not limited to the moment of direct interaction with children, but begins in the planning phase, especially in the processes of curation and selection of works. This planning demands respect for the child, sensitivity, attention to aesthetic quality, narrative, and diversity of genres, authors, illustrations, materials, and formats of books, reaffirming the role of the educator as a qualified mediator. It was found that literary play is an essential practice for learning, since it allows for the manifestation of the imagination, as well as the exercise of the sensitivity characteristic of childhood, marked by a poetic perception of the world. By promoting play practices based on the child's interpretations of the picture book, the establishment of links with visual reading is favored, permeated by lightness, joy, and learning.
Incorporação fotocatalítica de CO2 em moléculas orgânicas
(Universidade Federal de São Carlos, 2026-02-06)
Vega, Kimberly Benedetti
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Paixão, Márcio Weber
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https://lattes.cnpq.br/3773908504964104
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https://orcid.org/0000-0002-0421-2831
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https://lattes.cnpq.br/8451979701278048
Photocatalytic incorporation of CO2 into organic molecules. The fixation of carbon dioxide (CO2) into organic molecules represents a powerful approach to valorize this abundant, renewable, and non-toxic C1 carbon source, while simultaneously enabling access to highly functionalized compounds of synthetic and industrial relevance. In recent years, visible-light photocatalysis has emerged as a sustainable tool to achieve CO2 fixation under mild conditions, thereby expanding the chemical space accessible from simple building blocks. A particularly versatile approach relies on the Reductive Radical–Polar Crossover (RRPCO) mechanism, in which a radical intermediate generated under photocatalytic conditions is converted into a nucleophilic species during the photocatalyst turnover step, which can be intercepted by electrophiles such as CO2. This mechanistic pathway enables the selective formation of C–C bonds with high functional-group tolerance in a single operational step. This work describes three distinct strategies based on the RRPCO mechanism for the incorporation of CO2 into organic molecules, providing access to carboxylic acid derivatives. Chapter I: Visible-Light-Induced multicomponent difunctionalization of styrenes using CO2 and radical precursors. This chapter covers two complementary methodologies for the simultaneous installation of two distinct functionalities on styrene derivatives. In the first approach, sodium sulfinates and CO2 are used as coupling partners to access β-sulfonylated carboxylic acids in good yields and with broad functional group tolerance. Catalyst choice proved crucial: Ru(bpy)3 was optimal for electron-poor styrenes, whereas 4CzIPN performed better with less electron-deficient substrates. Exploiting the sulfone group as a leaving group, a one-pot carboxy-sulfonylation-elimination sequence enabled the α-carboxylation of styrenes to yield α-aryl-acrylates. The second approach is a redox-neutral β-amidation–α-carboxylation protocol using styrenes, CO2, and 1,4-carbamoyl-dihydropyridines under photocatalysis with 4CzIPN. This mild, operationally simple method tolerates diverse functional groups, allows late-stage functionalization of complex molecules, and incorporates both sterically hindered and amino acid–derived carbamoyl radicals, granting access to succinamic acids. Chapter II: Synthesis of α-amino acids by ConPET-mediated CO2 fixation into amides. This strategy enables the selective functionalization of α-C(sp3)–H bonds adjacent to the nitrogen atom in amides through the synergistic combination of Hydrogen Atom Transfer (HAT), consecutive Photoinduced Electron Transfer (ConPET), and RRPCO. CO2 and deuterium were incorporated at the α-position to the amide nitrogen, affording α-amino acids and α-deuterated amides in moderate to high yields. Mechanistic studies revealed that both 3DPAFIPN and its in situ photodegradation products generate highly reactive α-amino carbânions under exceptionally mild conditions, providing insights for future catalyst design and expanding photocatalyst activation concepts. Isotope labeling: In addition, the three developed protocols proved to be versatile tools for the synthesis of isotopically labeled products by enabling the incorporation of 13CO2 into styrenes and amides, resulting in the formation of α-aryl acrylates, succinamic acids, and α-amino acids. These results highlight the potential of RRPCO-based strategies for mechanistic studies as well as for applications in tracer studies, metabolic investigations, and pharmaceutical development.
Governança de tecnologia da informação: usos e incentivos aos softwares livres, proprietários e serviços em nuvem em autarquias federais
(Universidade Federal de São Carlos, 2026-02-06)
Nascimento, Edvaldo Ferreira do
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Martínez, Marta Pagán
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https://lattes.cnpq.br/7522593438014023
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https://orcid.org/0000-0001-7363-2939
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https://lattes.cnpq.br/8476313670502350
Information technology (IT), whether in a public or private company or educational institution, plays a fundamental role in ensuring that the institutional development plan is fulfilled according to the established goals. In this context, IT governance is essential to guarantee the security, efficiency, and strategic alignment of technology use in public institutions, such as Federal Institutes, Federal Centers for Technological Education (CEFETs), and Colégio Pedro II. When choosing technology, it is necessary to consider issues such as functionality, cost, interoperability, and compatibility with information security policies. Furthermore, the choice between free software, proprietary software, or cloud services should be based on technical and financial criteria, as well as ethical and social aspects related to science, technology, and society (STS), such as privacy, transparency, digital inclusion, and technological autonomy. In this way, IT governance can contribute to a more responsible and conscious management of technologies. The objective was to understand the technology governance adopted in information technology investments in institutions of the Federal Network of Professional, Scientific and Technological Education, verifying the reasons that lead to the choice of free, proprietary solutions or cloud services, comparing them with the practices of the Ministry of Education (MEC). The aim was to achieve better strategic alignment, efficiency, and user satisfaction with IT services, adding value to the institution and improving the services provided to society. To this end, a literature review and exploratory-descriptive field research were conducted, with a qualitative-quantitative approach, using a questionnaire applied to information and communication technology (ICT) managers. The analysis combined quantitative techniques (descriptive statistics), qualitative techniques (thematic content analysis), and triangulation with official documents and literature. A total of 29 institutions responded (28 from the Federal Network of Professional, Scientific and Technological Education (EPCT) and the MEC, representing 69% of the researched universe). Strong strategic alignment was observed, with the use of guiding documents such as the Information and Communication Technology Master Plan (PDTIC) and the Institutional Development Plan (PDI), as well as national guidelines, in addition to the presence of committees and the use of instruments such as preliminary technical studies (ETP), return on investment (ROI), and total cost of ownership (TCO). However, budgetary and personnel limitations, a cultural influence favorable to proprietary software, and the absence of specific policies for the three technological models verified were identified. The analyses show that technological choices are shaped by coercive pressures (laws, decrees, guidelines, and budgetary constraints), normative pressures (non-mandatory standards, professionalization, and adoption of frameworks, especially the ICT governance guide of the Information Technology Resources Management System (SISP)), and mimetic pressures (replication of solutions such as the Unified Public Administration System (SUAP)). It is concluded that IT governance in the EPCT Network is marked by institutional advances, but, due to the public context, it is dependent on external factors and socio-political constraints. The results achieved may contribute to expanding knowledge about the application of IT governance practices and technological choices in these and other related institutions, thus improving the services provided to the population.
Desenvolvimento de nanofibras de Pectina/HPC/PEO e Gelatina/HPC/PEO pela técnica de eletrofiação para liberação controlada de nitrogênio
(Universidade Federal de São Carlos, 2026-02-06)
Godoi, Ian Raffaello Gallo
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Ribeiro, Tatiana Santana
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https://lattes.cnpq.br/7952918513827867
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https://lattes.cnpq.br/6134659494518416
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Campos, Adriana
The excessive use of nitrogen fertilizers, such as urea, presents significant challenges, including contamination of water bodies and volatilization, which reduces its agronomic efficiency. In this context, the development of controlled-release systems emerges as a promising alternative to optimize nitrogen availability and minimize environmental losses. The present study aimed to develop and characterize polymeric nanofibers based on pectin/HPC/PEO and gelatin/HPC/PEO incorporated with urea, targeting their application in controlled nutrient release systems. The selection of pectin and gelatin as polymeric matrices was based on their potential for the development of sustainable systems, aligned with the principles of the circular economy, through the use of biodegradable compounds derived from industrial by-products. The nanofibers were produced by electrospinning, using optimized polymer solutions to ensure process stability and the formation of continuous fibers. Morphological characterization by scanning electron microscopy (SEM) revealed that the addition of urea enabled the formation of a well-defined network of continuous nanofibers with diameters on the nanometric scale, ranging from 225 nm to 1,039 nm for pectin fibers, and between 209 and 440 nm for gelatin fibers. FTIR and EDS analyses confirmed the incorporation of urea and the existence of chemical interactions between the fertilizer and the polymer matrices. Thermal stability was investigated by TGA and DTG, indicating that the addition of urea reduced the Tonset of the matrices by 2.2 °C for pectin and 3.3 °C for gelatin, evidencing a plasticizing effect. However, the incorporation raised the degradation temperature of the urea to levels above 200 °C, compared to 130 °C for free urea. Controlled release assays in aqueous medium, monitored by UV-Vis spectroscopy, demonstrated that the nanostructured systems promoted the gradual release of the nutrient. The pectin matrix showed a more pronounced initial release, reaching 68% in the first hours, while the gelatin fibers exhibited a more sustained profile, releasing 43% in the same period. Thus, the developed materials demonstrated potential for application as controlled-release fertilizer systems, contributing to a more efficient use of nutrients in agriculture.