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Número de cloroplastos como indicador estável para inferência de ploidia em portulaca spp.

2025-12-23T06:11:59Z

Título: Número de cloroplastos como indicador estável para inferência de ploidia em portulaca spp. Autor(es): Belo, Viviane de Oliveira Orientador: Rêgo, Mailson Monteiro do Abstract: The success of breeding programs for ornamental plants such as purslanes (Portulaca spp.) is closely linked to the correct identification of ploidy levels. Polyploidization is a technique that generates new genetic combinations and phenotypic variations, making it useful in the improvement of Portulaca spp. due to their ornamental, medicinal, and nutritional value. This study aimed to determine the ploidy level of Portulaca spp. accessions by counting the number of chloroplasts per guard cell, providing support for breeding programs of the species. Leaf samples from 15 genotypes cultivated in a greenhouse were collected and analyzed under an optical microscope (40×). Three stomata from each of five random fields of the leaf were analyzed, and the data were subjected to ANOVA, the Scott–Knott mean test, and Tocher clustering. The observed means varied widely, from 4.93 to 24.65 chloroplasts per guard cell, indicating the presence of different ploidy levels, ranging from diploids to hexaploids. Analysis of variance confirmed significant differences among genotypes (p < 0.001). Tocher clustering classified the accessions into four distinct groups and revealed high genetic divergence between the most contrasting accessions (PU0010 with 24.65 chloroplasts and PU001 with 4.93). Broad- sense heritability was high (98.56%), indicating strong genetic control of the trait. The results confirm that chloroplast counting is an efficient primary tool with high selective accuracy (99.3%), useful for selecting genotypes and guiding crosses for the subsequent development of promising hybrids with desirable characteristics such as vigor, resistance, and ornamental value. Editor: Universidade Federal da Paraíba Tipo: TCC

Anemia hemolitica imunomediada em cão

2025-12-23T06:11:52Z

Título: Anemia hemolitica imunomediada em cão Autor(es): Santos, Janderson Pergentino dos Orientador: Fernandes, Artur Cesar de Carvalho Abstract: Immune-mediated hemolytic anemia (IMHA) is an autoimmune disorder characterized by the premature destruction of erythrocytes. This destruction may occur directly in the circulation, due to the action of immunoglobulins and the complement system, resulting in intravascular hemolysis, or extravascularly, when sensitized cells are recognized and removed by macrophages of the mononuclear phagocyte system. The process results in severe, rapidly progressing anemia, often accompanied by lethargy, pale or icteric mucous membranes, splenomegaly, and exercise intolerance. Thromboembolism is the leading cause of death in affected dogs. This report aims to describe a case of primary IMHA in a two-year-old male Pitbull dog weighing 25 kg, treated at the Veterinary Hospital of the Federal University of Paraíba in July 2024. The patient presented clinical signs consistent with immune-mediated hemolytic anemia, which was confirmed by complementary tests and the therapeutic response. The animal was monitored for 21 days, with weekly follow-ups, showing a satisfactory clinical response, progressive improvement, and full recovery by the end of the period. This case highlights the importance of early diagnosis and appropriate management of this condition. Editor: Universidade Federal da Paraíba Tipo: TCC

Aprendizagem autônoma: as estratégias de estudo utilizadas pelos estudantes do ensino médio na disciplina de biologia

2025-12-23T06:11:56Z

Título: Aprendizagem autônoma: as estratégias de estudo utilizadas pelos estudantes do ensino médio na disciplina de biologia Autor(es): Almeida, Marcio do Nascimento Orientador: Ribeiro, Abraão Barbosa Abstract: This research aimed to identify the autonomous study and learning strategies used by high school students in the discipline of Biology. Developed through an exploratory- descriptive approach with a qualitative-quantitative nature, the study was conducted with 89 students from the three grades of high school in a public school in Paraíba, using questionnaires as the main data collection instrument. The results revealed a significant evolution in the use of study strategies throughout the school trajectory. In the first grade, only 34% of students reported using specific methods and techniques, while in the third grade this percentage reached 59%. Among the most mentioned strategies were video lessons, summaries, mind maps, systematic note-taking (fichamentos), exercise solving, and the Pomodoro technique for time management. An increase in the sophistication and diversification of these tools was observed as the grades advanced, with third-grade students demonstrating greater familiarity with strategies such as mind maps and time management methods. A preference for digital resources was identified, especially the internet, whose use progressively increased (32% in the 1st grade to 54% in the 3rd grade). The research also detected some student learning difficulties regarding the Biology discipline, such as content comprehension, memorization, and maintaining attention. As a pedagogical intervention, an educational video demonstrating specific study methods and techniques that can be used by students in their study routines was produced and made available to the research participants. It is concluded that there is an urgent need to implement, from the initial grades of high school, systematic programs that teach effective learning strategies, aiming to develop student autonomy and improve academic performance. It is recommended that future research establish causal relationships between the use of specific study methods and techniques and the improvement of academic performance in Biology, in addition to investigating the effectiveness of different strategies for specific contents of this discipline. Editor: Universidade Federal da Paraíba Tipo: TCC

Persistência de quarto arco aórtico direito em cão: relato de caso

2025-12-16T06:09:32Z

Título: Persistência de quarto arco aórtico direito em cão: relato de caso Autor(es): Silva, Felipe da Costa Santos Orientador: Fonseca, Erika Toledo da Abstract: The advancements in diagnostic techniques have rendered cardiovascular pathologies more prevalent in veterinary practice. Fetal development involves the formation of aortic arches for circulation, which must involute after birth to establish the great vessels. However, a failure in this process results in vascular ring anomalies, with Persistent Right Aortic Arch (PRAA) being the most common in dogs and cats (accounting for approximately 95% of cases). PRAA causes esophageal compression, leading to regurgitation in puppies following weaning and the introduction of solid foods, resulting in subnutrition and an increased risk of aspiration pneumonia. The recommended treatment is surgical intervention, which, if performed promptly after diagnosis, carries a favorable prognosis, often resulting in significant improvement or cure, with the esophagus typically regaining normal function. Although invasive, the procedure is necessary, as there is no clinical cure for PRAA. This study reports the case of a 4-month- old Pitbull female dog that underwent corrective PRAA surgery. The patient showed a decrease in regurgitation; however, a complete regression of the esophageal dilation did not occur due to the time interval between the onset of clinical signs and surgical resolution. This highlighted the importance of anatomical knowledge, rapid diagnosis and immediate surgical intervention to improve the quality of life of patients affected by this disease. Editor: Universidade Federal da Paraíba Tipo: TCC