http://repositorio.ufc.br/handle/riufc/41 2026-04-18T13:35:22Z 2026-04-18T13:35:22Z http://repositorio.ufc.br/handle/riufc/85921 2026-04-17T19:40:06Z 2026-01-01T00:00:00Z

Título: Encontro de Economia rural: Desenvolvimento rural no contexto das mudanças climáticas. Tipo: Livro

2026-01-01T00:00:00Z Brasil Sobrinho, Carlos Alberto http://repositorio.ufc.br/handle/riufc/85905 2026-04-16T19:18:06Z 2026-04-01T00:00:00Z

Título: Efeitos do fenômeno El Niño sobre o desempenho do agronegócio brasileiro: uma análise a partir do índice IboAgro Autor(es): Brasil Sobrinho, Carlos Alberto Abstract: This study analyzes the effects of El Niño characteristics on the economic and financial performance of Brazilian agribusiness from 1968 to 2024, through the construction and application of a specific sectoral index called IboAgro. The central objective is to evaluate, in an integrated way, how global climate shocks associated with El Niño and regional variations in specialization are related to the financial dynamics of the main agribusiness companies specific to the Brazilian stock exchange. To this end, the work proposes the calculation of IboAgro based on the IBOVESPA methodology, adapted to exclusively reflect the behavior of companies in the agricultural, livestock, and agro-industrial segments, with consistent inclusion and permanence criteria, ensuring greater stability and sectoral representativeness over time. The empirical approach adopts a quantitative econometric strategy, using models with errors consistent with heteroscedasticity and autocorrelation, as well as dynamic analytical arrangements that incorporate the Oceanic Niño Index (ONI) as a measure of the intensity of the El Niño phenomenon and variations in average annual variations by Brazilian macro-region as channels of climate transmission. Furthermore, climatic asymmetries between El Niño and La Niña episodes are explored, as well as procedures for reducing multicollinearity through Principal Component Analysis. The results indicate that positive shocks associated with El Niño exert contemporaneous and persistent negative impacts on the performance of the IboAgro index, highlighting the sector's high climate sensitivity. Furthermore, a relevant asymmetry in climatic effects is observed, with more intense impacts during El Niño episodes compared to shocks of the opposite sign. Regional rainfall, especially in the Northeast and Southeast regions, reveals itself as a central channel for the transmission of these shocks, being associated with statistically significant reductions in the aggregate performance of Brazilian agribusiness. This evidence is consistent with national and international literature, which highlights the vulnerability of the agricultural sector to extreme climatic events and the intensification of hydrological variability. It is concluded that the IboAgro constitutes a consistent and adequate analytical instrument for monitoring the response of Brazilian agribusiness to climate shocks, offering relevant support for risk management, the formulation of public policies, and the strategic planning of companies in the face of the challenges posed by climate change. Tipo: Dissertação

2026-04-01T00:00:00Z Martins, Karla Bianca de Souza http://repositorio.ufc.br/handle/riufc/85889 2026-04-15T20:36:09Z 2025-01-01T00:00:00Z

Título: Busca ativa/monitoramento da frequência diária do estudante: avaliação da política educacional pós crise de pandemia - Covid-19 Autor(es): Martins, Karla Bianca de Souza Tipo: Dissertação

2025-01-01T00:00:00Z Sousa, Poliana Brito de http://repositorio.ufc.br/handle/riufc/85872 2026-04-15T16:59:13Z 2026-01-01T00:00:00Z

Título: Potencial de uso da semente de Flamboyant-Mirim (Caesalpinia pulcherrima (L) Sw) como ingrediente funcional em pães Autor(es): Sousa, Poliana Brito de Abstract: Flamboyant-mirim seeds are a source of protein, lipids, and other nutrients, such as minerals and vitamins, and can be used as an ingredient to enrich the nutritional value of baked goods. Therefore, the objective of this research was to characterize flamboyant-mirim seed flour (FSF) and evaluate the effect of adding its flour and gel (GSF) in the production of loaf bread. Initially, the FSF was fractionated by granulometric sieving (0.710 mm, 0.500 mm, 0.355 mm, and 0.250 mm) and subjected to chemical, technological, functional, microstructural, and toxicity analyses. A 0.250 mm fraction showed high levels of ash, lipids, protein, fiber, minerals (Ca, Mg, P, K, Fe, Mn, and Zn), and better functional performance, including greater water solubility, oil absorption capacity, and emulsifying properties. Analyses indicated heterogeneous morphology, similar crystalline patterns among the samples, and absence of toxicity. Compounds such as amino acids, sugars, and unsaturated fatty acids were also identified. In the second stage, loaf-type breads were made with different concentrations of FSF (3.96–11.04%) and GSF (0.17–5.82%), using a central composite rotatable design. Dependent variations included technological, physicochemical, nutritional, and functional parameters. The inclusion of FSF and GSF in the loaf-type breads increased the levels of protein, lipids, ash, fiber, minerals, phenolic compounds, and antioxidant activity. Improvements were also observed in technological constraints, such as specific volume, alveolar structure, and color characteristics. Conversely, there was a reduction in moisture, acidity, density, and luminosity of the crumb. It is concluded that formulations containing 11.035% FSF and 3% GSF, 10% FSF and 5% GSF, and 10% FSF and 1% GSF provide benefits with greater nutritional value, improved technological properties, and high functional potential, representing promising alternatives for the development of baked goods with clean label appeal and natural enrichment. Tipo: Tese

2026-01-01T00:00:00Z