Qualidade ovocitária de tambaqui (Colossoma macropomum) ao longo da estação reprodutiva

The study aimed to analyze the Colossoma macropomum reproductive behavior and quality of the female gametes throughout the reproductive season. The experiment was carried out in Pimenta Bueno - Rondônia State (Northern Brazil) during the reproductive season (2010-2011) using 36 females. Each sampling was performed on a 15 ± 5 days interval. Female gametes were collected by stripping and the following analyses were performed: weight of oocytes released (g); productivity index, fertilization and hatching rate. During the sampling period was verified effect (p < 0.05) of collecting time into the season for oocytes weight, productivity index and fertilization rate. Although the period 3 (December) did not differ significantly from other periods, it showed better parameters for the quality of C. macropomum oocytes.O estudo foi conduzido com o objetivo de analisar o comportamento reprodutivo da espécie Colossoma macropomum, quanto à qualidade de seus gametas femininos ao longo da estação reprodutiva. O experimento foi executado em Pimenta Bueno-Rondônia durante a estação reprodutiva do C. macropomum. Utilizaram 36 fêmeas durante a estação de 2010-2011. Cada coleta apresentou um intervalo de 15±5 dias. Através da extrusão foram coletados os gametas femininos e realizadas as seguintes análises ao longo da estação: peso de oócitos liberados (g); índice de produtividade; taxa de fertilização e eclosão. Durante a estação 2010-2011 foi verificado efeito (p < 0,05) de período (coleta) dentro da estação para peso de oócitos, índice de produtividade e taxa de fertilização. Apesar do período 3 (coleta – mês de dezembro) não ter diferenciado significativamente de alguns períodos, foi o que apresentou os melhores parâmetros estabelecidos para a qualidade dos oócitos de C. macropomum

Atividade antinociceptiva e estudo toxicológico de extrato aquoso de Egletes viscosa Lessa (Asteraceae)

Egletes viscosa Less (Asteraceae), popularmente conhecida como "macela" ou "macela-da-terra", é uma planta largamente usada na medicina popular devido as suas propriedades: anti-inflamatória, bactericida, antidiarréica, mio-relaxante, anti-espasmódica, antinociceptiva, digestiva e anti-viral. Análise fitoquímica do extrato aquoso da Egletes viscosa (AEEV) mostrou elevada presença de flavonóides. Este estudo examinou o potencial antinociceptivo do AEEV em roedores usando diferentes concentrações (100, 200 and 400 mg/kg, p.o.). Os resultados mostraram significante efeito antinociceptivo quando testadas as doses (200 mg/kg-pEgletes viscosa Less (Asteraceae), popularly known as "macela" or "macela-da-terra", is a plant widely used in popular medicine due to its anti-inflammatory, bactericidal, antidiarrhoea, mio-relaxant, antispasmodic, antinociceptive, digestive, and anti-viral properties. Phytochemical screening of aqueous extract of Egletes viscosa (AEEV) revealed the high presence of flavonoids. This study examined the oral antinociceptive potential of AEEV in rodents using different concentrations (100, 200, and 400 mg/kg, p.o.). The results showed significant antinociceptive action when tested in writhing (200 and 400 mg/kg-

Tumores de células granulares na língua: relato de 2 casos

ResumoO tumor de células granulares é uma neoplasia benigna incomum com forte predileção pela cavidade oral, com um maior número de casos afetando a região da língua. Apresenta-se geralmente como um nódulo solitário, assintomático, de base séssil, com crescimento lento (meses ou anos) e coloração variável. Apesar da sua etiologia incerta, há estudos que apontam para uma origem neural para a lesão. O presente artigo tem como objetivo apresentar 2 casos clínicos cuja queixa principal era um nódulo submucoso no dorso da língua, com evolução lenta e superfície epitelial hígida. Em ambos os casos, o diagnóstico definitivo foi realizado após a análise histológica e imuno-histoquímica e o tratamento realizado através de excisão cirúrgica conservadora. Também são discutidos os aspetos clínicos, histológicos e imuno-histoquímicos do tumor de células granulares.AbstractThe granular cell tumor is an uncommon benign neoplasm with a strong predilection for the oral cavity, with a greater number of cases affecting the tongue. It typically presents as a solitary nodule, asymptomatic, sessile base, with slow growth (months or years) and variable color. Despite its uncertain etiology, studies suggest a neural origin for the lesion. The aim of this article is to present two clinical cases whose main complaint was a submucosal nodules in the dorsum of the tongue, with slow evolution and healthy surface. In both cases, definitive diagnosis was made after histological and immunohistochemical analysis and the treatment was made with conservative surgical excision. It is also discussed clinical, histological and immunohistochemical features of granular cell tumor

PROPOSTA DE INDICADORES DE DESEMPENHO PARA AVALIAR AS CONTRIBUIÇÕES DO PIBIC NA FORMAÇÃO ACADÊMICA E CIENTÍFICA DOS ESTUDANTES EGRESSOS NO ÂMBITO DA FACULDADE DE TECNOLOGIA DA UNIVERSIDADE FEDERAL DO AMAZONAS – UFAM

Faced with a reality of constant change and competitiveness, new skills and competencies are required every day to operate in a diffuse and complex society. Scientific Initiation Programs are an excellent way to promote and teach scientific skills that will allow you to achieve these new skills. However, it is important to monitor whether these Programs are achieving the expected objectives with the available resources. Thus, this research aimed to propose performance indicators to evaluate the contributions of the Scientific Initiation Program to the academic and scientific training of students graduating from the UFAM PIBIC and, in particular, within the scope of the Faculty of Technology of this Institution. To this end, it was necessary to map data from UFAM's PIBIC in the period from 2008 to 2018, characterizing the profile of graduates from the Program of courses at UFAM and the Faculty of Technology and the Faculty of Social Studies, making a comparison between the students' performance graduates of PIBIC/PAIC from the Faculty of Technology and the Faculty of Social Studies with those presented in the PIBIC General Report (CNPq) in the period 2016-2018 and presenting the proposal for management indicators for evaluating Scientific Initiation at UFAM. The methodology adopted was research through an exploratory and descriptive study, based on data collection using an electronic form sent to FES and FT Scientific Initiation graduates. The result was an outline of the development of PIBIC/PAIC, in the period in question, with an indication of the main characteristics of the undergraduate researchers. This facilitated the construction and validation of performance indicators to monitor Scientific Initiation actions. However, future studies could be directed towards a more comprehensive verification of other UFAM Units, also considering the perception of professors-supervisors regarding scientific research for undergraduate students.Ante una realidad de constante cambio y competitividad, cada día se requieren nuevas habilidades y competencias para desenvolverse en una sociedad difusa y compleja. Los Programas de Iniciación Científica son una excelente manera de promover y enseñar habilidades científicas que te permitirán alcanzar estas nuevas habilidades. Sin embargo, es importante monitorear si estos Programas están logrando los objetivos esperados con los recursos disponibles. Así, esta investigación tuvo como objetivo proponer indicadores de desempeño para evaluar los aportes del Programa de Iniciación Científica a la formación académica y científica de los estudiantes egresados ​​del PIBIC de la UFAM y, en particular, en el ámbito de la Facultad de Tecnología de esta Institución. Para ello, fue necesario mapear datos del PIBIC de la UFAM en el período de 2008 a 2018, caracterizando el perfil de los egresados ​​del Programa de Carreras de la UFAM y de la Facultad de Tecnología y de la Facultad de Estudios Sociales, haciendo una comparación entre los desempeño de los estudiantes egresados ​​del PIBIC/PAIC de la Facultad de Tecnología y de la Facultad de Estudios Sociales con los presentados en el Informe General del PIBIC (CNPq) en el período 2016-2018 y presentando la propuesta de indicadores de gestión para la evaluación de la Iniciación Científica en la UFAM. La metodología adoptada fue la investigación a través de un estudio exploratorio y descriptivo, basado en la recolección de datos mediante un formulario electrónico enviado a los egresados ​​de Iniciación Científica de la FES y FT. El resultado fue un esbozo del desarrollo del PIBIC/PAIC, en el período en cuestión, con indicación de las principales características de los investigadores de pregrado. Esto facilitó la construcción y validación de indicadores de desempeño para monitorear las acciones de Iniciación Científica. Sin embargo, futuros estudios podrían orientarse hacia una verificación más integral de otras Unidades de la UFAM, considerando también la percepción de los profesores-tutores sobre la investigación científica de los estudiantes de pregrado.Diante de uma realidade de constante mudanças e competitividade, são requeridas a cada dia novas habilidades e competências para operar numa sociedade difusa e complexa. Os Programas de Iniciação Científica são um meio excelente para a promoção e ensino de habilidades científicas que permitirão conquistar essas novas competências. Entretanto, convém acompanhar se esses Programas estão alcançando os objetivos esperados com os recursos disponíveis. Assim, esta pesquisa teve como objetivo propor indicadores de desempenho para avaliação das contribuições do Programa de Iniciação Científica na formação acadêmica e científica dos estudantes egressos do PIBIC da UFAM e, em especial, no âmbito da Faculdade de Tecnologia dessa Instituição. Para tanto, foi necessário mapear os dados do PIBIC da UFAM no período de 2008 a 2018, caracterizando o perfil dos egressos do Programa dos cursos da UFAM e da Faculdade de Tecnologia e da Faculdade de Estudos Sociais, realizando um comparativo entre o desempenho dos discentes egressos do PIBIC/PAIC da Faculdade de Tecnologia e da Faculdade de Estudos Sociais com os apresentados no Relatório de Geral do PIBIC (CNPq) no período de 2016-2018 e apresentando a proposta de indicadores gerenciais de avaliação da Iniciação Científica da UFAM. A metodologia adotada foi a pesquisa por meio de estudo exploratório e descritivo, baseada na coleta de dados mediante aplicação de formulário eletrônico encaminhado aos egressos da Iniciação Científica da FES e FT. O resultado foi um delineamento do desenvolvimento do PIBIC/PAIC, no período em questão, com a indicação das principais características dos pesquisadores graduandos. Isso facilitou na construção e validação de indicadores de desempenho para acompanhamento das ações de Iniciação Científica. Entretanto, estudos futuros poderão ser direcionados para a uma verificação mais abrangente de outras Unidades da UFAM, considerando ainda a percepção dos professores-orientadores quanto à pesquisa científica para os alunos da graduação

GROWTH, YIELD AND POST-HARVEST EVALUATION OF LETTUCE PLANTS SUBJECTED TO DIFFERENT LEAF SILICON CONCENTRATIONS

Lettuce is considered the most produced and consumed leafy vegetable; however, it has short post-harvest life, which generates significant losses for both producers and consumers. Studies have proven the beneficial effect of silicon on fruits and vegetables. Therefore, the aim of the current study is to evaluate the influence of leaf calcium silicate application on the growth, biomass production and postharvest conservation of curly lettuce. The experiment was carried out in greenhouse at Federal Rural University of Amazonia, Parauapebas Campus / PA. It followed a completely randomized design (CRD) with five Si concentrations (0.0, 2.0, 4.0, 6.0 and 8.0 mg L-1) and eight repetitions, which totaled 40 plants. Plants were grown in plastic pots (capacity = 3 dm3) filled with soil classified as Red-Yellow Argisol. Different Si concentrations were applied to plant leaves, at the 20th and 27th days after transplantation (DAT). Silicon has favored the growth and development of lettuce plants, as well as reduced their post-harvest weight loss. It was possible concluding that the herein tested Si concentrations, which were applied to leaves - in the form of calcium silicate - had beneficial effect on lettuce plants

Diagnosis, management, and follow-up of extensive dermoid cyst of the submental region

Dermoid cyst (DC) is a cystic lesion of developmental origin and uncertain etiology that rarely affects the floor of the mouth. We report a case of a large lesion found in the submental and submandibular region in a 25-year-old male patient. Computed tomography revealed extensive hypodense lesion in the submental and submandibular space without peripheral enhancement. The microscopical analysis showed a cystic cavity lined by orthokeratinized stratified squamous epithelium. The cystic capsule was composed of dense fibrous connective tissue containing cutaneous attachments, such as sebaceous and sweat glands. The diagnosis of DC was made. The differential diagnosis of expansive sublingual lesions can be clinically challenging due to the similarity with several lesions frequently observed in this region. Herein, we describe a case of extensive DC arising in the floor of the mouth, presenting clinical, imaging, and microscopical features

Biosynthesis of silver nanoparticles mediated by entomopathogenic fungi: antimicrobial resistance, nanopesticides, and toxicity

Silver nanoparticles are widely used in the biomedical and agri-food fields due to their versatility. The use of biological methods for the synthesis of silver nanoparticles has increased considerably due to their feasibility and high biocompatibility. In general, microorganisms have been widely explored for the production of silver nanoparticles for several applications. The objective of this work was to evaluate the use of entomopathogenic fungi for the biological synthesis of silver nanoparticles, in comparison to the use of other filamentous fungi, and the possibility of using these nanoparticles as antimicrobial agents and for the control of insect pests. In addition, the in vitro methods commonly used to assess the toxicity of these materials are discussed. Several species of filamentous fungi are known to have the ability to form silver nanoparticles, but few studies have been conducted on the potential of entomopathogenic fungi to produce these materials. The investigation of the toxicity of silver nanoparticles is usually carried out in vitro through cytotoxicity/genotoxicity analyses, using well-established methodologies, such as MTT and comet assays, respectively. The use of silver nanoparticles obtained through entomopathogenic fungi against insects is mainly focused on mosquitoes that transmit diseases to humans, with satisfactory results regarding mortality estimates. Entomopathogenic fungi can be employed in the synthesis of silver nanoparticles for potential use in insect control, but there is a need to expand studies on toxicity so to enable their use also in insect control in agriculture.The work was funded by the Coordination for the Improvement of Higher Education Personnel (Capes); Sergipe Agricultural Development Company (Emdagro), the Industrial Biotechnology Program, University Tiradentes, Sergipe Technological Park (SergipeTec), and the Banco do Nordeste.info:eu-repo/semantics/publishedVersio

Corncob as carbon source in the production of xanthan gum in different strains Xanthomonas sp.

Xanthan gum (XG) is a biopolymer obtained in fermentation and used as a rheology control agent in aqueous systems and in stabilizing emulsions and suspensions. XG, together with other polysaccharides, can form soft, cohesive composite gels. The carbon source in the fermentative process is responsible for one-third of the production costs, and the search for less expensive and sustainable alternatives is ongoing. The use of agricultural residues such as the corncob is highly suggestive due to their abundance. This study aims to evaluate the use of derived hemicellulose fractions from the alkaline extraction of corncob as a carbon source in the production of XG in trials using four strains of Xanthomonas sp. (629, 1078, 254, and S6). The results indicate that strain 629 provides the higher yield (8.37 ± 5.75 g L−1) while using a fermentation medium containing a carbon source of saccharose (1.25%), hemicellulose fractions (3.75%), and salts. In this same medium, the strain 629 produces gum in 3% aqueous solution, showing the higher apparent viscosity (9298 ± 31 mPa s−1) at a shear rate of 10 s−1 at 25 °C. In conclusion, corncob is proven to be a promising sustainable alternative carbon source in the obtention of XG, improving the economic viability of the process within a biorefinery context. Saccharose must, however, also be included in the fermentation medium.0F1A-358B-43B5 | Fernando Jorge Ribeiro da MataN/

Plasma cell cheilitis: the diagnosis of a disorder mimicking lip cancer

Plasma cell cheilitis (PCC) is an inflammatory disorder of unknown etiology that affects the lip. It is characterized histologically by a dense infiltrate of plasma cells with a variety of clinical features. The response to different therapeutic modalities is controversial, especially regarding the effectiveness of corticosteroids. We present a case of a 56-year-old Caucasian man with a painful ulcerated and crusted area in the lower lip, resembling a squamous cell carcinoma or actinic cheilitis. Topical corticosteroid was used for one week, which resulted in partial regression and motivated a biopsy. The histological examination provided the diagnosis of PCC. The patient has been disease-free for six months. We also provide a discussion on the criteria of differential diagnosis and management of this rare condition. See ERRATUM&nbsp