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Polímeros auto regenerativos: um estudo envolvendo a química supramolecular e a ciência dos polímeros
(Universidade Federal de São Carlos, 2025-01-28)
Pinola, Livia Guarizo
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Marques Netto, Caterina Gruenwaldt Cunha
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https://lattes.cnpq.br/8042236152815373
;
https://orcid.org/0000-0002-3285-4129
Self-healing polymers are materials capable of autonomously repairing damage or responding to external stimuli, such as light, heat, or pressure changes, without the need for direct human intervention. These smart polymers utilize principles from polymer science and supramolecular chemistry to facilitate regeneration by leveraging reversible chemical interactions, including hydrogen bonding, van der Waals forces, and metal-ligand complexation. Self-healing can be classified as intrinsic when it arises from the material’s inherent properties or extrinsic when it relies on healing agents encapsulated in micro- or nanocapsules. The regeneration mechanisms involve physical processes (chain diffusion, shape memory), chemical interactions (supramolecular interactions, reactive chain ends), or hybrid approaches. These materials have broad applications in industries requiring enhanced durability, such as civil engineering, electronics, and biomedical fields, while also promoting sustainability by reducing waste and replacement costs. The development of smart self-healing polymers offers significant advantages, including increased longevity, reduced maintenance costs, and a positive environmental impact, making them promising for various applications in engineering, electronics, and medicine. This review concludes that integrating supramolecular chemistry with polymer science represents a significant advancement in the development of intelligent and sustainable materials capable of meeting growing industrial and environmental demands.
Certificação internacional de sustentabilidade e carbono: desafios e impactos na promoção da sustentabilidade
(Universidade Federal de São Carlos, 2025-01-28)
Oliveira, Juliana Meneghel de
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Tiezzi, Rafael de Oliveira
;
https://lattes.cnpq.br/7979063304544915
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https://orcid.org/0000-0001-8682-7807
This study analyzed the context, challenges, and impacts of implementing the International Sustainability and Carbon Certification (ISCC) in Brazil. Focusing on companies that use waste as raw material for biofuel production, the research adopted a qualitative and exploratory approach to assess the criteria and standards of the certification, as well as its practical applications in the Brazilian context. The growing interest of the European market in Brazilian biofuels was highlighted, as Brazil is one of the world's leading producers of this type of fuel, underscoring the importance of the ISCC in ensuring compliance with international requirements and access to demanding markets such as Europe. The study emphasized the relevance of certification as a tool to promote traceability, environmental compliance, and waste reutilization. However, difficulties in implementation were identified, attributed to the European origin of the standard and the developmental differences between continents. Despite these challenges, the certification has the potential to transform management practices, reduce greenhouse gas emissions, and encourage waste reutilization.
Projeto de uma estação de tratamento de água usando Filtração em Múltiplas Etapas (FiME) para o Assentamento Rural Bela Vista Paranapanema-SP adaptado às demandas dos assentados
(Universidade Federal de São Carlos, 2025-01-28)
Lisboa, Pedro Roberto Araújo
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Gonzalez, Beatriz Cruz
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Pantoja Filho, Jorge Luis Rodrigues
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https://lattes.cnpq.br/7139425471960071
This work is the result of a partnership between the Federal University of São Carlos (UFSCar), mediated by the Center for Extension and Research in Water and Effluents (CEPAE), and the management of the Bela Vista Paranapanema-SP Rural Settlement. The settlement has no access to drinking water and the water treatment model suggested in the project is based on the characterization of the raw water from the Jurumirim Dam and is adapted to the demands raised by the community through assemblies. The Water Treatment Plant (WTP) model suggested is Multi-stage Filtration using water tanks as a tank and includes the stages of dynamic pre-filtration in pebbles, vertical upward flow pre-filtration in pebbles and sand and slow filtration with fine sand, activated carbon and two synthetic blankets. In order to adapt to the demands, the raw and treated water pumping stations were sized and the tanks were resized for masonry construction.
Mercado de carbono e projetos REDD+ como ferramentas de combate às mudanças climáticas
(Universidade Federal de São Carlos, 2025-01-28)
Galindo, Igor Torres
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Tiezzi, Rafael de Oliveira
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https://lattes.cnpq.br/7979063304544915
;
https://orcid.org/0000-0001-8682-7807
The increase of emissions of greenhouse gases caused by anthropogenic actions intensified the global warming phenomenon, causing so-called climate changes and extreme weather events. The effects can already be noticed on the Earth’s surface and the urgency for solutions brings with it the search for strategies and tools that aim to mitigate the effects of climate change through reduction of emissions. In this context, the carbon market and its mechanisms, as REDD+, emerges. The strategy of reducing emissions from deforestation and degradation appears as an feasible alternative in respect of forest conservation. A case study of a real project was analyzed with the aim of understanding its true impacts in practice and verifying its relevance as a preservation agent, demonstrating the objectives to be achieved that benefit the environment and society. The results show the practical efficiency with regards to reducing greenhouse gas emissions and fighting climate change and also reinforce the importance of searching for alternatives that increasingly aim to reduce emissions and the mitigation of anthropogenic impacts caused on the environment, seeking to converge towards a future in which there is a sustainable relationship between man and nature.
Ensino de educação física na perspectiva do desenho universal para a aprendizagem: contribuições para a inclusão escolar
(Universidade Federal de São Carlos, 2025-01-28)
Braz, Aline Basso
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Munster, Mey de Abreu Van
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https://lattes.cnpq.br/7861049737421476
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https://orcid.org/0000-0003-2943-5967
;
https://lattes.cnpq.br/2356593038737074
Although the literature indicates an increase in the number of studies related to the theme of Physical Education (PE) and inclusion, difficulties in enabling the implementation of school inclusion persist. In this sense, it is important to provide Physical Education teachers with support and knowledge regarding strategies that enable the participation and learning of all students. Given the above, the objective of the study is to analyze whether a school Physical Education teaching program based on the principles of universal design for learning (UDL) meets the needs of a group of students who learn together in diversity. The specific objectives are: to verify the multiple means of engagement, the multiple means of representation, and the multiple means of action and expression used during the PE teaching program; and to verify whether the PE teaching program based on the principles of UDL allows the participation and involvement of students with disabilities in classes. A qualitative research was conducted, characterized as field research, of the program evaluation type, developed in a school of the regular education network in a medium-sized city in the interior of São Paulo. Students enrolled in two second-year elementary school classes that have two students with intellectual disabilities participated. The data collection technique used in this research was systematic observation (field diary and the Assessment Protocol of the Principles of UDL applied to Physical Education - PADUA-EF). The Physical Education program based on the principles of UDL (PEF-DUA) lasted one academic semester and had three weekly classes of 50 minutes each. The field diaries were filled out by the researcher during the application of the PEF-DUA and the observations were made through the analysis of the filming of the program classes. The treatment of the data from the field diaries was based on thematic analysis and the observations on descriptive analysis. The application of the Physical Education teaching program (PEF-DUA), structured based on the principles of Universal Design for Learning (UDL), proved to be effective in promoting a more accessible school curriculum, including in classes composed of students with intellectual disabilities. The program consistently incorporated the three principles of UDL, favoring the engagement and active participation of all students in the proposed activities. Although challenges such as limited class time, lack of material resources and poor infrastructure were faced, careful pedagogical planning was essential for the successful implementation. The findings reveal that the principles of UDL can be successfully adapted to the context of school Physical Education, contributing to the creation of more inclusive environments. The study also highlights the importance of expanding future research, applying the PEF-DUA in contexts involving different types of disabilities, in order to evaluate its effectiveness in more diverse situations.
Análises morfométricas e fisiográficas de sub-bacias hidrográficas na Bacia Alto Paranapanema
(Universidade Federal de São Carlos, 2025-01-28)
Godoy, Ana Carolina de
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Rodrigues Pantoja Filho, Jorge Luis
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https://lattes.cnpq.br/7139425471960071
Water is an essential resource for life, playing a vital role in ecosystems and anthropogenic activities. Due to the improper use of water resources, population growth, and inefficient planning, water has become a scarce resource. The study of the morphometric characteristics of these basins is crucial for the sustainable management of water resources, identification of vulnerable areas, and prevention of water-related disasters such as droughts and floods. Thus, this study aims to analyze 12 sub-basins of four different landscape matrix types in the UGRHI 14 - Alto Paranapanema: forest, pasture, agriculture, and urban area. The analysis considered physiographic, morphometric, and land use aspects, using parameters such as: form factor (Kf); compactness coefficient (Kc); circularity index (Ic); drainage network frequency (Dr); sinuosity of the main river (Sin); drainage density (Dd); texture ratio (T); average basin slope (H); relief ratio (Rr); elongation ratio (Re), average surface runoff extension (l), and finally, the roughness index (Ir).
Resistência e a luta pela água e acesso ao saneamento básico: o caso do assentamento rural Bela Vista Paranapanema/SP
(Universidade Federal de São Carlos, 2025-01-29)
Santos, Débora Cristina Souza dos
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Silva, André Pereira da
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Rodrigues Pantoja Filho, Jorge Luis
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https://lattes.cnpq.br/7139425471960071
This study delves deeper into the analysis of disparities in access to potable water and basic sanitation in marginalized communities, taking the Rural Settlement of Bela Vista as a case study. Founded 11 years ago, the settlement has faced the absence of an adequate potable water supply system since its creation, generating numerous difficulties for the community. Through a qualitative and quantitative approach, and under the perspective of Black epistemology, this research investigates the mobilization and resistance strategies adopted by the community, aiming to unveil sociospatial inequalities and human rights violations. The research reveals the fundamental role of Black leadership in this historical struggle and, for the first time, accompanies the community in the final preparations for the inauguration of the potable water supply system, a milestone in guaranteeing access to this basic right. By analyzing the relationship between the lack of access to basic services and environmental justice from a decolonial perspective, the research revealed the profound influence of historical processes on the current water crisis. The decolonization of practices and discourses on water proved to be fundamental to understanding and transforming this reality, paving the way for the construction of a more equitable and sustainable future.
The robust pickup and delivery problem with time windows
(Universidade Federal de São Carlos, 2025-01-29)
Abreu, Alex Paranahyba de
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Costa, Luciano Carlos Azevedo da
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https://lattes.cnpq.br/3954372189546017
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https://orcid.org/0000-0002-6324-6556
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Munari, Pedro
This study addresses the robust pickup and delivery problem with time windows (RPDPTW), in which uncertainty in demands and travel times is modelled using robust optimisation. The RPDPTW involves determining the least-cost routes to serve transportation requests from origins to destinations, while respecting vehicle capacity and time window constraints under all anticipated realisations of uncertain data. Two robust counterpart formulations are proposed. The first employs the linearisation of recursive equations to produce a compact formulation, suitable for implementation with general-purpose mixed-integer programming solvers. The second relies on a cutting-plane approach, incorporated into a tailored branch-and-cut (B&C) algorithm. Extensive computational experiments were conducted to evaluate the proposed methods across diverse instance configurations. While the compact formulation performed effectively in some cases, the B&C algorithm solved a larger number of instances to optimality and consistently provided high-quality solutions under uncertainty. Robust solutions significantly reduced the risk of infeasibility compared to deterministic solutions, with modest increases in routing costs. In addition, we provide managerial insights by analysing the results of Monte Carlo simulations across different instance characteristics.
Comparação entre avaliação objetiva e subjetiva do comportamento sedentário de pessoas idosas brasileiras da comunidade: um estudo transversal
(Universidade Federal de São Carlos, 2025-01-29)
Berto, Nathalia Leite
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Gabriela, Cassemiliano
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Takahashi, Anielle Cristhine de Medeiros
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https://lattes.cnpq.br/8336705133403404
Introduction: Sedentary behavior (SB) is defined as a set of activities performed while awake in a sitting or lying position with an energy expenditure ≤ 1.5 METs. It is an indicator of mortality and is associated with various health risks, such as chronic diseases and functional decline in the older adults. Given its significant impact, accurately assessing sedentary behavior is crucial. Objective: To compare the objective and subjective assessment of SB in Brazilian older adults in the community and to analyze which activities are most performed in SB by this population. Methods: This is a cross-sectional study. Participants were older adults ≥ 60 years, members of the "Revitalização Geriátrica" extension project. Objective analysis was performed using accelerometry, considered the gold standard for SB assessment, and subjective analysis was performed using the LASA-SBQ questionnaire. The questionnaire was administered on the same day that the accelerometer was attached to the participant, which was removed after 7 days. Data collection occurred during August and September 2021. Data analysis: Data normality was tested using the Shapiro-Wilk test. To compare the objectively and subjectively assessed SB, the Wilcoxon test was used, according to normality assumptions. Spearman's test was used to verify the correlation between SB variables. A significance level of 5% was adopted and the analysis was performed using SPSS 2.0 software. Results: No statistical difference was found between the objective and subjective assessment variables of SB, however, a significant, positive, and weak correlation was observed (r = 0.319), indicating that the variables cannot present the same behavior consistently and therefore, one assessment method cannot replace the other. The analysis of the most performed activities in SB showed that watching television was the most frequent, followed by talking on the phone, listening to music, and engaging in hobbies. Conclusion: The results did not identify statistical differences between the objective and subjective assessments of SB, but the weak correlation indicates that the methods are not consistent with each other. Therefore, one method cannot replace the other. This reinforces the importance of raising awareness among the older adults population about their SB habits to promote more effective interventions.
Regulação do crescimento de pimenta biquinho vermelha (Capsicum chinense) visando seu uso em ornamentação
(Universidade Federal de São Carlos, 2025-01-29)
Morales, Beatriz Romanini
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França, Christiane de Fátima Martins
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https://lattes.cnpq.br/0406702644219281
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https://orcid.org/0000-0003-1558-7476
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https://lattes.cnpq.br/4249341558657717
One of the sectors of the Brazilian flowers and ornamental plants market that is booming is the decoration of internal spaces with potted plants. However, some species that have attractive ornamental characteristics are medium to tall, not adapting to cultivation in small pots, as the case of the Biquinho Vermelha pepper. One of the alternatives to reduce plant size is through the use of the growth regulator, paclobutrazol (PBZ). This work aimed to determine the effect of PBZ concentrations and application protocols on the ornamental quality and overall preference of plants. PBZ was applied in five concentrations by three different protocols. At commercial maturity, the plants were evaluated by various plant growth parameters regarding their size and characteristics of their crown, fruits and leaves, in addition to sensory analysis using the global preference test. PBZ produced plants with darker green leaves and its direct application, regardless of the time of application, was more effective in modulating plant growth parameters compared to application via immersion. Despite this, the sensory analysis showed a greater preference among evaluators for plants in which PBZ was applied in low concentrations (2.5 and 5 mg L-1) applied directly 30 days after transplanting or through immersion of the root/substrate system in the solutions. The application of PBZ directly to the cultivation substrate, during transplantation, cannot be recommended because, in addition to the lower overall preference, the plants contained a reduced number of fruits and these were smaller in length, which harmed the ornamental value of the plants. Thus, the application of paclobutrazol via or via direct application 30 days after transplanting at concentrations of 2.5 and 5 mg L-1 produced Biquinho Vermelha pepper plants with attractive ornamental characteristics, which could be a market alternative for producers of potted ornamental plants in addition to traditional growth control methods.
Ku phamela (servir) alimentos nas cerimônias é hierarquizar e violentar: uma perspectiva sobre direitos humanos e Estado em Maputo, Moçambique
(Universidade Federal de São Carlos, 2025-01-30)
Bila, Josué Julião
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Leirner, Piero de Camargo
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https://lattes.cnpq.br/3883880276055777
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https://orcid.org/0000-0002-6485-027X
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https://lattes.cnpq.br/8114794394854674
This thesis examines how and why people serve themselves and are served food at marriage ceremonies in Maputo. I observed the way of ku phamela (serving) in the complex world of those celebrations and even in families, where to serve and be served is to fall into a category, sometimes of “person”, sometimes of “individual”. Observing the categorizations of people and individuals led me to understand the problems related to Mozambique's social structure, where hierarchies, privileges and violence are a symbolic weapon for the (de)qualification of social classes and positions. Perhaps this is the reason why in our state a dhla axurha (eats greedily) whoever is hierarchically superior and whoever has networks of intermediaries, in bureaucratic and political environments. Furthermore, when the Mozambican party-state imposed itself in 1975, even though it embodied the Marxist-Leninist ideology, it was, in practice, swallowed up by the mouth of social history, leaving it to reproduce, homologate and reinforce hierarchies, privileges and violence through its governmental and security apparatuses.
The effect of chemical composition on the microstructure and mechanical properties of Ti-Nb-Mo thin films deposited by DCMS on AISI 316L substrate for biomedical applications
(Universidade Federal de São Carlos, 2025-01-30)
Martinez Orozco, Katherine Judith
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Nascente, Pedro Augusto de Paula
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https://lattes.cnpq.br/1387043320265189
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https://orcid.org/0000-0002-9155-031X
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https://lattes.cnpq.br/6301808903391335
The aim of this work is to study the effect of chemical composition on the microstructure and mechanical properties of five titanium β-alloys thin films: Ti74Nb21Mo5, Ti74Nb19M7, Ti72Nb19Mo9, Ti67Nb22Mo11, and Ti71Nb29 (as reference) deposited on AISI 316 L substrates. Films having thicknesses of 671 nm, 573 nm, 841 nm, and 963 nm were deposited by means of direct current magnetron sputtering (DCMS). Microstructural characterization was carried out by scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), and grazing incidence X-ray diffraction (GIXRD). The mechanical properties were tested by means of nanoindentation test, residual stress, and potentiodynamic polarization test. In general, homogeneous thin films were obtained with nanometric grain sizes. The films exhibit clusters and pores. Compressive and tensile residual stress were measured, and expressive results correlating with the morphology of the films were found. As more homogeneous the thin film, the higher the compressive stress value. Inverse Hall-Petch relation was observed, explained by the decreasing in the hardness values simultaneously with decreasing in grain size.
Structural relaxation of glass and its influence on other dynamic processes
(Universidade Federal de São Carlos, 2025-01-30)
Lancelotti, Ricardo Felipe
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Edgar, Dutra Zanotto
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https://lattes.cnpq.br/3671237918412066
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https://lattes.cnpq.br/1055167132036400
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https://orcid.org/0000-0002-6111-6520
Projeto de um tribômetro para ensaio de atrito e desgaste rotativo ou linear recíproco
(Universidade Federal de São Carlos, 2025-01-30)
Rosa, Bruno Barioni Ribeiro
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Watanabe, Flávio Yukio
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https://lattes.cnpq.br/6492641614740181
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https://lattes.cnpq.br/9386719052146610
In the competitive industrial scenario, the search for innovative solutions that provide quality, efficiency, and durability to machines and equipment has demanded investment in research and testing of new materials, components, or lubricants before prototype construction. In this context, tribometers, equipment for testing friction, wear, lubricants, and lubrication regimes, are essential for preliminarily and comparatively analyzing different tribological alternatives under various loading conditions, types of motion, rotation/speed, lubrication, and temperature. The main objective of this work is the development of a low-cost pin-disc type tribometer design aimed at academic applications, with the unique feature of being capable of performing the tests established in ASTM G99-17 and ASTM G133-22 standards. The designed tribometer has two interchangeable modules that allow for performing either rotary or reciprocating linear tests between the tested elements, varying load, rotation, and lubrication condition. The designs and specifications of all components that make up the designed tribometer are presented at the end of the work and the expectation is that the construction and application of the tribometer will enable the development of teaching and research activities in Higher Education Institutions, contributing to the improvement of the training of undergraduate and graduate students in the field of engineering, as well as the development of technological solutions that can bring economic benefits to the industry and society in general.
ToMAS: Sumarização abstrativa multinível baseada em tópicos usando LLMs
(Universidade Federal de São Carlos, 2025-01-30)
Capellaro, Leonardo
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Caseli, Helena de Medeiros
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https://lattes.cnpq.br/6608582057810385
;
https://orcid.org/0000-0003-3996-8599
;
Branco
Recently, political discussions in Brazil have gained prominence, becoming one of the most debated topics on social media. Factors such as the diversity of themes, the occurrence of events that attract public attention, and the constant increase in the volume of messages have made it challenging to identify in a clear, concise, and objective manner the main topics of the posts. In this context, this study proposes a new automated method that explores the use of automatic topic generation and multi-level summarization techniques using large-scale language models. The proposed method was evaluated to generate summaries from tweets about Brazilian politics collected during the 2022 presidential elections. In addition to the multi-level summarization method, a new summary evaluation method was also proposed, based on the divide and conquer strategy for applying the BERTScore automatic evaluation measure to lengthy texts, which also incorporates the generated sentence size as a weight in the evaluation score. Qualitative and quantitative analyses indicate that the combination of these techniques was able to successfully extract and summarize the main topics, demonstrating great potential to be a useful informative tool in the assessment of different opinions, issues, and topics publicly discussed.
Correções de Bartlett baseadas em bootstrap no modelo de regressão Dirichlet com parametrização baseada no vetor de médias
(Universidade Federal de São Carlos, 2025-01-30)
Vianna, Vinícius Morgado Rosa
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Pereira, Gustavo Henrique de Araujo
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https://lattes.cnpq.br/4536501674241631
In parametric regression models, it is common to be interested in testing hypotheses about the values of their parameters. In this regard, the most commonly used test when testing more than one parameter is the Likelihood Ratio Test (LRT). This test can be used, for example, to infer the parameters of the Dirichlet multivariate regression model, which is widely applied in modeling compositional data, i.e., multivariate positive observations summing to one. A problem with this test is that the distribution of its statistic under H0 may not be well approximated by the chi-square distribution in small samples, making the test too liberal. Thus, we consider a model with a specific parameterization of the Dirichlet distribution, where the parameters are a function of the mean vector, and apply a Bartlett correction factor based on bootstrap to the LRT statistic. In this way, the corrected test is expected to have a test statistic whose distribution under H0 is closer to the chi-square distribution, regardless of the sample size. The main objective of this study is to compare the performance of the tests resulting from the bootstrap corrections to the usual LRT. Monte Carlo simulation studies showed that the tests with the applied corrections achieved null rejection rates close to nominal levels in small and moderate sample sizes, while also demonstrating good power. An application on sleep stages illustrates the usefulness of these corrected tests.
Structural relaxation of glass and its influence on other dynamic processes
(Universidade Federal de São Carlos, 2025-01-30)
Lancelotti, Ricardo Felipe
;
Zanotto, Edgar Dutra
;
https://lattes.cnpq.br/1055167132036400
;
https://orcid.org/0000-0003-4931-4505
;
https://lattes.cnpq.br/3671237918412066
The physics of the glassy state is governed by two fundamental phenomena. The first is the liquid-to-glass transition, characterized by a kinetic constraint that restricts molecular rearrangement at a low enough temperature (or high enough viscosity), leading to the formation of a glass (unstable). The second is the spontaneous structural relaxation of glass back towards the metastable supercooled liquid state, wherein this constraint is overcome. This thesis investigates the mechanisms and effects of the spontaneous structural relaxation on the atomic configurations and macroscopic properties of single- and mixed-modifier oxide glasses. The research is organized into chapters that focus on: (i) the interplay between cooling rates and structural relaxation, studied using the flash-DSC technique; (ii) the kinetics of structural relaxation induced by physical aging, analyzed through changes in refractive index and ionic conductivity at various temperatures; (iii) the response of enthalpy recovery and refractive index of glasses to up- and down-jumps in fictive temperature, evaluated through the Kohlrausch–Williams–Watts function and the Tool–Narayanaswamy–Moynihan model; (iv) the network connectivity speciation and atomic rearrangements during structural relaxation in silicate glasses, analyzed using Raman and Nuclear Magnetic Resonance spectroscopy; and (v) the impact of slow structural changes due to the phenomenon of structural relaxation on ionic diffusion, which significantly influences the faster process of ionic conductivity in different glasses. The findings highlight the importance of understanding and controlling structural relaxation to design new glasses with optimized properties and ensure the long-term stability of these properties.
Aplicação de óleo essencial na preservação de produtos cárneos
(Universidade Federal de São Carlos, 2025-01-30)
Valdivino, Larissa Gabrielle Neri
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Matos, Andreia Pereira
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https://lattes.cnpq.br/6155202940087696
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https://orcid.org/0000-0001-9502-116X
Essential oils (EOs), extracted from plant sources such as oregano, rosemary and thyme, have antimicrobial and antioxidant properties that make them promising alternatives for preserving meat products. This paper reviews the application of these oils in the inhibition of pathogenic microorganisms, such as Listeria monocytogenes, Salmonella spp. and Escherichia coli; in the control of spoilage microorganisms, and in the reduction of lipid oxidation, with an emphasis on their integration into emerging technologies, such as edible films and active packaging. In addition, the sensory, nutritional and physicochemical impact of the use of EOs in fresh and processed meats was addressed. The review highlights benefits such as increased shelf life and the replacement of synthetic preservatives, in line with the demands for more natural and sustainable products. However, challenges such as the volatility of compounds and possible sensory alterations are addressed, indicating nanotechnology and encapsulation as potential solutions. It is concluded that EOs, in addition to meeting the demands of the food industry, have broad potential in synergy with other conservation strategies.
Gênero e Ciência: a trajetória das mulheres no Congresso de Ecologia do Brasil
(Universidade Federal de São Carlos, 2025-01-31)
Rosa, Julia Ghion de
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Rother, Débora Cristina
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https://lattes.cnpq.br/2288957756143935
Since the 17th century, women have been marginalized in science, with their research and discoveries often appropriated, silenced, or ignored. Despite social and legal changes in recent decades, gender inequality persists, imposing distinct professional obstacles on men and women in their scientific careers. This study analyzes gender variation in publications from the Brazilian Ecology Congress available on the website of the Brazilian Society of Ecology, covering the years 2000, 2009, and 2019. Data were collected on the type of work, the number of authors, the gender of the main author and the total authors, as well as the percentage of women in each publication, with gender identification based on the first name, according to the common sense of the Portuguese language. Out of 130 works analyzed, 97 could not have the authors' gender identified due to the absence of the first name, and among the identified authors, 60% are women. This study highlights the importance of advancing the pursuit of gender equity in academia, promoting greater visibility and equal opportunities for women in science.
3D-printed aerogels and solution-blow spun fibers modified with metal-organic framework/molybdenum disulfide for adsorption and photodegradation of environmental contaminants
(Universidade Federal de São Carlos, 2025-01-31)
Alves, Ana Laura Martins Mulkson
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Corrêa, Daniel Souza
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https://lattes.cnpq.br/0461451015026948
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https://lattes.cnpq.br/1324806626095208
3D-PRINTED AEROGELS AND SOLUTION-BLOW SPUN FIBERS MODIFIED WITH METAL-ORGANIC FRAMEWORK/MOLYBDENUM DISULFIDE FOR ADSORPTION AND PHOTODEGRADATION OF ENVIRONMENTAL CONTAMINANTS. The removal of organic contaminants from aqueous systems, such as synthetic dyes, poses a significant challenge due to the limited efficiency of conventional methods typically employed. The presence of dyes in the environment can lead to various negative impacts, as these compounds often exhibit toxicity and persistence. In this context, the development of novel and efficient methods and materials capable of not only removing but also degrading such contaminants is imperative. In this work, a material based on MOF (metal-organic framework) MIL-88A and MoS₂ was synthesized to develop an efficient photocatalyst for environmental contaminant removal. Photodegradation tests using methylene blue (MB) as a model dye, with the material in powder form, demonstrated an efficiency exceeding 90 % within 120 min. To facilitate reuse and minimize photocatalyst aggregation in solution, the MOF/MoS₂ was immobilized onto two distinct platforms: I) aerogels fabricated via 3D printing and ii) polyvinylpyrrolidone (PVP)/SiO₂ fibers produced by solution blow spinning (SBS). The 3D-printed aerogels were fabricated using gelatin, carboxymethylcellulose, and alginate, incorporating 5 % and 7.5 % by weight of MOF/MoS₂, and were designated as HD (without MOF/MoS₂), HD/MOF/MoS₂ 5 %, and HD/MOF/MoS₂ 7.5 %. Adsorption tests showed efficiencies of 16.77 %, 28.66 %, and 95.86 %, respectively. In photodegradation experiments, all aerogels achieved efficiencies exceeding 80 %. The PVP/SiO₂ fibers produced by SBS underwent thermal treatment to for partial removal of the polymeric portion before incorporating MOF/MoS₂. In MB removal tests using PVP/SiO₂/MOF/MoS₂ fibers, efficiencies greater than 90 % were observed within 48 h. Additionally, the PVP/SiO₂ fibers contributed to both adsorption and photodegradation processes, suggesting a synergistic effect. Finally, the PVP/SiO₂/MOF/MoS₂ platform demonstrated versatility in removal other dyes and the antibiotic tetracycline. Thus, the results obtained for both platforms indicate their potential for mitigating environmental contaminants.