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Efeitos do bisfenol-a na capacidade fotossintética e no crescimento de Egeria densa
(Universidade Federal de São Carlos, 2026-10-22)
Praes, Lavínia Carolini Rios
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Cunha-Santino , Marcela Bianchessi da
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http://lattes.cnpq.br/2356641063223397
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https://orcid.org/0000-0001-6048-0745
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http://lattes.cnpq.br/3903264919955823
Bisphenol A (BPA) is an emerging contaminant widely used in the plastics industry; its persistent presence in inland water bodies poses a potential threat to aquatic biota. This study investigated the effects of three BPA concentrations (5 mg L⁻¹ [T1], 15 mg L⁻¹ [T2], and 25 mg L⁻¹ [T3], alongside a control [TC]) on the net photosynthetic rates and growth kinetic parameters of the submerged aquatic macrophyte Egeria densa under controlled laboratory conditions (27 °C and a 12-h photoperiod). Median net photosynthetic rates were 1.75 (TC), 1.00 (T1), 1.25 (T2), and 1.35 mg O₂ g⁻¹ DW h⁻¹ (T3). Although photosynthetic activity decreased, treatment differences were not statistically significant (p > 0.05). In contrast, growth kinetic parameters were highly sensitive to the pollutant, with significant differences (p < 0.05) between the control and the higher-concentration treatments (T2 and T3). The growth coefficient (µ) decreased progressively with increasing contaminant levels: 0.14 day⁻¹ in the TC (doubling time, td = 5 days), 0.07 day⁻¹ in T1, 0.04 day⁻¹ in T2, and 0.02 day⁻¹ in T3; this demonstrates that the control value was seven times higher than that of the treatment with 25 mg BPA L⁻¹. Each 1 mg L⁻¹ increase in BPA reduced the plant growth coefficient by approximately 9%. The half-life of the compound in the experimental media ranged from 6.6 to 8.5 weeks. The results suggest that the growth coefficient of E. densa is a more adequate biometric indicator of BPA contamination than net photosynthetic rate, highlighting the importance of integrated approaches for assessing the toxicity of micropollutants in macrophytes.
Rastreio de situações de trauma entre os profissionais da Atenção Primária à Saúde, por meio do aplicativo APP Mental
(Universidade Federal de São Carlos, 2026-10-26)
Ferreira, Vitória Caroline dos Santos
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Martini, Larissa Campagna
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http://lattes.cnpq.br/8969823407559809
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https://orcid.org/0000-0002-4766-0634
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http://lattes.cnpq.br/4392869893747920
Health professionals work in unpredictable contexts and are exposed to stressful events with traumatic potential, which causes mental health damage, including post-traumatic stress disorder (PTSD). This study evaluates the feasibility of the APP Mental application for the prevention and screening of PTSD symptoms among health professionals, using the Posttraumatic Stress Disorder Checklist (PCL-5). The research adopts a quantitative, cross-sectional design, with approval from the institutional research ethics committee. The sample comprises individuals over 18 years of age, formally employed by the municipal health department and assigned to Primary Health Care services, who interact with the application for 12 weeks. The application administers a sociodemographic questionnaire and asks about experiences of trauma throughout life, and it sends the PCL-5 to users who report trauma, with a cutoff score of 31 or higher. The analysis uses descriptive statistics in RStudio software. The theoretical framework relies on the DSM-5 diagnostic criteria and on studies that associate occupational exposure to traumatic events with psychological distress among health workers. In the partial results, the sample comprises 28 people, mostly women (96.4%), with a mean age of 42 years. Among the 12 PCL-5 respondents, half (50%) score 31 or higher, which indicates greater symptom severity. The study concludes that the preliminary data reinforce the importance of mental health promotion, prevention, and care actions for health workers and indicate the need to develop educational materials on trauma and coping with stress.
Inserção de dispositivo intrauterino de cobre no pós-parto vaginal imediato guiada por ultrassonografia: experiência de Iniciação Científica
(Universidade Federal de São Carlos, 2026-10-26)
Carvalho, Kemelly Aparecida
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Okido, Marcos Masaru
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http://lattes.cnpq.br/5915321013293271
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https://orcid.org/0000-0002-6861-9761
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Martini, Larissa Campagna
The immediate postpartum period represents an important opportunity to offer contraceptive methods, especially in situations in which subsequent access to health services may be limited. The copper intrauterine device (IUD) is an effective and long-acting contraceptive option, although its insertion immediately after vaginal delivery is associated with higher expulsion rates. In this context, this study presents the undergraduate research experience developed at the Federal University of São Carlos, whose objective was to evaluate whether ultrasound-guided insertion of the copper IUD immediately after vaginal delivery would be associated with lower expulsion rates compared with the conventional technique. A randomized, controlled, double-blind clinical trial was conducted, with ultrasound follow-up between 40 and 60 days after delivery. The final sample consisted of 30 participants, 15 in the intervention group and 15 in the control group. Total, partial, and combined expulsion rates were 6.7%, 13.3%, and 20.0%, respectively, in the ultrasound-guided group, compared with 13.3%, 40.0%, and 53.3% in the control group. Although lower rates were observed in the intervention group, no statistically significant differences were identified. The experience contributed to the development of knowledge related to scientific methodology, data analysis, and critical thinking, in addition to representing an important academic opportunity through the Institutional Scientific Initiation Scholarship Program (PIBIC).
Produção de mudas cítricas e perspectivas para citricultura brasileira
(Universidade Federal de São Carlos, 2026-12-01)
Oliveira, Mateus Borges de
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Conceição, Patrícia Marluci da
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https://lattes.cnpq.br/6623193710607120
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https://orcid.org/0000-0002-9966-3191
The citrus industry is one of the main activities of Brazilian agribusiness, playing an essential role in generating income, employment, and foreign exchange for the country. This study aimed to analyze the technical and legal aspects involved in the production of citrus nursery plants, as well as to discuss the perspectives and challenges of the Brazilian citrus sector, in order to inform production practices that ensure phytosanitary quality and sector sustainability. Through an integrative literature review, information was gathered from scientific publications, legislation, and technical reports issued by institutions such as MAPA, Embrapa, and Fundecitrus. It was observed that the mandatory use of screened nurseries for citrus seedling production initially established in the state of São Paulo and later extended Nationwide represented a milestone in the modernization of the sector, reducing the spread of diseases such as Citrus Variegated Chlorosis (CVC) and huanglongbing (HLB). The importance of using certified mother plants, implementing sanitary indexing, and applying improved grafting techniques and protected-environment management was also verified. The adoption of rootstocks such as citrandarins and Swingle citrumelo has contributed to greater disease resistance and better adaptation to different edaphoclimatic conditions. Furthermore, the expansion of citrus cultivation into new regions such as Goiás, Mato Grosso do Sul, Bahia, and Paraná reflects not only the search for areas with lower HLB incidence but also economic and structural factors that influence the productive reorganization of the sector. It is concluded that the integration of technology, legislation, and sustainable management is fundamental to ensuring seedling health, competitiveness, and the long-term sustainability of the Brazilian citrus industry.
Análise genética de vacas em relação à sua idade no último parto através de modelos de sobrevivência
(Universidade Federal de São Carlos, 2026-12-03)
Afonso, Eduarda Godoy
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Caetano, Sabrina Luzia
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https://lattes.cnpq.br/2340330162391128
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Zuanetti, Daiane Aparecida
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https://lattes.cnpq.br/8352484284929824
In Brazil, the study of bovine longevity is extremely important due to the country’s position in the export and production of this sector and, for this reason, there is a strong interest in achieving maximum profitability in this activity. The economic longevity of cows is totally related to reproductive performance, with the trait known as the age of the cow at last calving (ACLC) being a very important variable in this context. Since this variable cannot always be perfectly measured in some scenarios, a censoring criterion is generally applied to this characteristic, which is based on the difference between the date of the cow’s last observed calving and the date of the last calving on the farm. If this difference is greater than or equal to 36 months, the cow failed, as she has gone too long without calving and will be discarded. Otherwise, the cow is still considered reproductive and her age at last calving is censored, since there is still a possibility of her having another pregnancy. Therefore, one of the objectives of this study is to genetically analyze the IVUP variable using frailty models applied to survival analysis. The use of this type of model is justified by the inclusion of random effects, allowing the prediction of genetic factors associated with each animal and also considering associations between them. Another objective of the study is to identify genetic variables that influence bovine longevity, and this will be done through a Genome-Wide Association Study (GWAS). The analysis is done using a sample of 862 cows, daughters of 47 different bulls. For confidentiality reasons, the origin of the data is kept secret.