Repositório Institucional da UEG

Preservando, disseminando e democratizando o conhecimento científico e acadêmico da Universidade Estadual de Goiás.

Pesquisar Acervo Navegar por Comunidades

Communities in DSpace

Select a community to browse its collections.

Now showing 1 - 5 of 9

Recent Submissions

Formação continuada de professores de ciências da natureza: contribuições de um guia pedagógico para o ensino de eletivas a partir da realidade de Luziânia-GO
(Universidade Estadual de Goiás, 2026-06-10)
Sousas, Denise Ferreira de
;
Fialho, Wanessa Cristiane Gonçalves
;
http://lattes.cnpq.br/4454903998917211
;
https://lattes.cnpq.br/1898132601826735
;
Fialho, Wanessa Cristiane Gonçalves
The main concern of this work is to investigate the challenges of in-service teacher training, carried out by the Center for Studies, Research and Training of Education Professionals (CEPFOR), following the reform of secondary education with the implementation of formative itineraries. CEPFOR is responsible for managing and coordinating actions aimed at disseminating distance education, being responsible for developing, implementing, supporting, coordinating, approving, and supervising training programs and projects in the distance learning modality. Teachers should move towards a vision in which practical action generates knowledge. From this point of view, I question whether continuing education has been effective in meeting the needs of teachers and whether their needs have been heard. My objective is to evaluate the reach and effectiveness of continuing education programs offered to teachers in the public school system of the state of Goiás, focusing on professionals working in the municipality of Luziânia and its surroundings, and to present possible changes in the implementation strategies of this continuing education based on an educational product focused on peer training. The starting point is a data collection based on bibliographic research. In the second phase, I observed the facts or phenomena through problem-based learning, and in the third phase, I contacted teachers who could provide data or suggest possible interventions, culminating in the production of an educational product: a continuing education course for teachers in the area of Natural Sciences and their Technologies, geared towards the professional needs of the teachers and the application of the product. The final evaluation indicated significant results, as the continuing education met the teachers' needs and enabled its application in the classroom.
Fotobiomodulação na consolidação de fraturas ósseas
(Universidade Estadual de Goiás, 2024-12-13)
Chaves, Bárbara Glenda Castro
;
Melo, Aurélio Barbosa de
;
https://orcid.org/0000-0002-8712-3868
;
http://lattes.cnpq.br/2988830912909220
;
Sampaio, Lucas Henrique
Resulting from a master’s thesis, the present study investigates the interactions between light and biological tissues aimed at the treatment of bone fractures. It discusses bone physiology, the importance of more efficient techniques for treating fractures, and the potential of photobiomodulation (PBM) for bone regeneration. The results of this research were based on a systematic literature review following the Cochrane protocol, with its research plan previously registered in the International Prospective Register of Systematic Reviews (PROSPERO) (CRD42024554046), to verify the efficacy of PBM in human bone regeneration compared to placebo and conventional treatments. Five clinical trial articles were included in this review; their results showed no significant differences in accelerating bone callus formation or reducing the fracture line. However, they demonstrated benefits such as pain and edema reduction, as well as a lower intake of medication during the treatment period. Furthermore, the studies included in this review lacked standardization in assessment methods, dosage, and treatment duration, preventing precise conclusions. Nevertheless, studies already exist demonstrating the cost-benefit of photobiomodulation in regenerative treatments, which justifies the continuation of research in this field. To this end, further studies with standardized approaches, longer durations, larger samples, and regular radiographic monitoring are necessary to establish precise guidelines for applying photobiomodulation for bone fracture regeneration.
Estudo teórico da interação entre Apigenina e Nanotubo de Nitreto de Boro como material promissor com Nanocarreadores
(Universidade Estadual de Goiás, 2026-02-25)
Costa, Mário Alves da
;
Santos, José Divino dos
;
https://lattes.cnpq.br/2279900314020119
;
http://lattes.cnpq.br/9298990694958014
;
Santos, José Divino dos
Computational chemistry methods were employed to evaluate the interaction between apigenin (APG), a flavonoid with known therapeutic properties, and boron nitride nanotubes (BNNTs), as well as to investigate the potential of BNNTs as nanocarriers. BNNT models were generated by rolling a hexagonal h-BN sheet using shell bash algorithms. The geometries were initially optimized using the PM7 method, with hydrogenated termini to minimize edge effects, and subsequently subjected to Density Functional Theory (DFT) calculations employing the B3LYP functional and the 6-31G(d) basis set with GD3 dispersion correction. Simulations were performed both in vacuum and in an aqueous environment, using the Polarizable Continuum Model (PCM) to account for the dielectric effect of water. The encapsulation of APG within the BNNT preserved the stability of the system in both media, with negative binding energies indicating favorable interactions. Solvation enthalpies (–10.93 kcal/mol for APG, –27.45 kcal/mol for BNNT, and –30.65 kcal/mol for the complex) indicate an approximately threefold increase in the solubility of APG. The band gap was used to assess reactivity and stability, yielding values of 6.11 eV for BNNT, 4.18 eV for APG, and 4.09 eV for the complex, indicating preservation of the electronic properties of the drug. Molecular descriptors revealed an increase in electrophilic character, suggesting enhanced affinity toward nucleophilic sites of biomolecules, such as those present on tumor cell surfaces, which typically exhibit higher superficial electron density. Molecular dynamics simulations demonstrated the stability of the encapsulated drug over 50 ns, supported by analyses of center-of-mass distance, root mean square fluctuation (RMSF), and radius of gyration, which confirmed the structural integrity of the system. Binding free energy calculations using the MM/PBSA method revealed that van der Waals interactions play a central role in stabilizing the APG–BNNT complex. Overall, these results indicate that BNNTs are promising nanocarriers capable of enhancing the solubility and stability of APG without altering its electronic structure, reinforcing the potential of the APG–BNNT system for the development of nanopharmaceuticals and controlled drug delivery systems.
Sorghum bicolor como fonte de compostos alelopáticos para o manejo sustentável de Bidens pilosa
(Universidade Estadual de Goiás, 2026-08-27)
Silva, Natália Oliveira
;
Souza, Flívia Fernandes de Jesus
;
http://lattes.cnpq.br/7424287411637161
;
Matos, Fábio Santos
;
https://orcid.org/0000-0002-7666-006X
Blackjack (Bidens pilosa) is among the main invasive weeds in tropical agricultural systems, exhibiting high competitive ability and an increasing occurrence of herbicide-resistant biotypes. In this context, the use of allelopathic compounds of plant origin emerges as a sustainable alternative for weed management. The present study aimed to evaluate the allelopathic potential of sorghum (Sorghum bicolor) extract on the germination and early development of Bidens pilosa seedlings. The experiment was conducted in a completely randomized design, with six concentrations of sorghum extract (0, 10, 20, 40, 80, and 100%) and five replications. Germination (G), germination speed index (GSI), mean germination time (MGT), hypocotyl length (HL), radicle length (RL), fresh mass (FM), and dry mass (DM) of the seedlings were evaluated. The extract concentrations significantly affected germination, seedling vigor, and early growth. The sorghum extract promoted concentration-dependent responses. Lower concentrations stimulated some characteristics related to germination and early growth, whereas higher concentrations reduced germination, vigor, and biomass accumulation. Radicle length showed high sensitivity to the extract, with a progressive reduction as extract concentration increased. The 50% inhibitory concentration (IC₅₀) for radicle growth was estimated at 34.67% extract. The results demonstrate that sorghum extract has allelopathic and bioherbicidal potential against Bidens pilosa, and may constitute a complementary tool for sustainable weed management.
Composto pé de boi: alternativa na produção de mudas de aroeira
(Universidade Estadual de Goiás, 2026-08-04)
Vieira, Jéssica Karina Mesquita
;
Lima, Roldão Carlos Andrade
;
https://orcid.org/0000-0002-7239-2555
;
http://lattes.cnpq.br/3335875582568538
;
https://orcid.org/0000-0002-5054-1927
The production of seedlings of native forest species is a fundamental step in ecological restoration programs and is directly influenced by the physiological quality of the seeds and the growing conditions. In this context, the objective of this study was to evaluate seed germination and the initial development of seedlings of aroeira (Astronium urundeuva (M. Allemão) Engl.), a native species of high ecological and economic importance. In the first chapter, the effects of different temperatures and substrates on seed germination were evaluated using variables such as germination percentage, germination rate index, seedling length, and dry weight. The results showed that the species’ germination response varies depending on the conditions under which the germination test was conducted. In the second chapter, the potential of the organic compost “pé de boi” as a substrate component for seedling production was evaluated at different proportions mixed with soil and commercial substrate. The emergence rate index, height, collar diameter, number of leaves, dry mass, and Dickson quality index were analyzed. The results demonstrated that substrate composition significantly influences seedling development; moderate proportions of “pé de boi” compost yielded satisfactory performance, while high concentrations limited initial growth. Overall, the results obtained contribute to the improvement of aroeira propagation techniques, providing relevant information for germination tests, seedling production, and ecological restoration programs.