Pesquisa | SciELO

RESUMO Objetivo: Analisar a associação entre a participação em exercícios físicos relacionados ao fitness (EFRF) e a insatisfação com a imagem corporal (IIC) em adolescentes e avaliar a interação entre os exercícios físicos e o estado nutricional nesta associação. Métodos: Estudo transversal realizado em 2015 com 799 adolescentes (10 a 16 anos) de 14 escolas públicas de Curitiba (PR), Brasil. A IIC foi avaliada por meio do Body Shape Questionnaire e da Escala de Silhuetas. A participação em EFRF foi avaliada pelo Questionário de Atividade Física para Adolescentes e classificada em “não pratica”, “pratica ≤300 minutos/semana” e “pratica >300 minutos/semana”. As regressões de Poisson e logística multinomial, ajustadas por sexo, maturação sexual e estado nutricional, analisaram a associação entre EFRF e IIC. Resultados: A prevalência de IIC foi de 28,3%; 52,4% dos adolescentes queriam reduzir a silhueta e 48,7% não praticavam a EFRF. Adolescentes que praticavam EFRF >300 minutos/semana tiveram prevalência 28% maior para algum nível de IIC (razão de prevalência — RP 1,28; intervalo de confiança de 95% — IC95% 1,08–1,52) e chance 46% menor de querer reduzir silhuetas (OR 0,54; 95IC% 0,35–0,82), comparados aos não praticantes. Não houve interação entre os EFRF e o estado nutricional na associação com IIC. Conclusões: Os adolescentes que praticam EFRF >300 minutos/semana estão mais propensos a apresentar algum nível de IIC e têm menores chances de reportar o desejo de aumentar silhuetas, independentemente do estado nutricional. Objetivo (EFRF (IIC Métodos 201 79 10 (1 1 anos PR, PR , (PR) Brasil Silhuetas pratica, pratica pratica” 300 ≤30 minutossemana minutos semana >30 minutos/semana. . multinomial sexo Resultados 28,3% 283 28 3 524 52 4 52,4 487 48 7 48,7 razão 1,28 128 95 IC95 IC 1,08–1,52 108152 08 46 OR 0,54 054 0 54 95IC 0,35–0,82, 035082 0,35–0,82 35 82 0,35–0,82) praticantes Conclusões 20 ( (PR 30 ≤3 >3 28,3 2 5 52, 48, 1,2 12 9 IC9 1,08–1,5 10815 0,5 05 03508 0,35–0,8 8 ≤ > 28, 1, 1,08–1, 1081 0, 0350 0,35–0, 1,08–1 108 035 0,35–0 1,08– 03 0,35– 1,08 0,35 1,0 0,3

ABSTRACT Objective: The aim of this study was to analyze the association between participation in fitness-related exercises (FRE) and body image dissatisfaction (BID) in adolescents and evaluate the interaction between physical exercise and nutritional status in this association. Methods: A cross-sectional study was conducted in 2015 involving 799 adolescents (10–16 years old) from 14 public schools in Curitiba (PR), Brazil. BID was assessed using the Body Shape Questionnaire and the Silhouette Scale. The FRE was classified as “does not practice,” “practices ≤300 min/week,” and “practices >300 min/week” by the Physical Activity Questionnaire for Adolescents. Poisson and multinomial logistic regressions, adjusted for sex, sexual maturation, and nutritional status analyzed the association of FRE and BID. Results: The BID prevalence was 28.3%; 52.4% of the adolescents wanted to reduce their silhouettes; and 48.7% did not practice FRE. Adolescents who practiced FRE >300 min/week had a 28% higher prevalence for some level of BID (PR 1.28; 95%CI 1.08–1.52) and a 46% lower chance of wanting to reduce silhouettes (OR 0.54; 95%CI 0.35–0.82), compared to nonpractitioners. There was no interaction between FRE and nutritional status in association with BID. Conclusions: The adolescents who practice FRE >300 min/week are likely to have some level of BID and are less likely to report the desire to increase their silhouettes, regardless of their nutritional status. Objective fitnessrelated fitness related (FRE (BID Methods crosssectional cross sectional 201 79 10–16 1016 10 16 (10–1 old 1 PR, PR , (PR) Brazil Scale does practice, practices 300 ≤30 min/week, minweek min week >30 regressions sex maturation Results 28.3% 283 28 3 524 52 4 52.4 487 48 7 48.7 1.28 128 95CI CI 95 1.08–1.52 108152 08 46 OR 0.54 054 0 54 0.35–0.82, 035082 0.35–0.82 35 82 0.35–0.82) nonpractitioners Conclusions 20 10–1 101 (10– 30 ≤3 >3 28.3 2 5 52. 48. 1.2 12 9 1.08–1.5 10815 0.5 05 03508 0.35–0.8 8 10– (10 ≤ > 28. 1. 1.08–1. 1081 0. 0350 0.35–0. (1 1.08–1 108 035 0.35–0 ( 1.08– 03 0.35– 1.08 0.35 1.0 0.3

https://doi.org/10.1590/1984-0462/2025/43/2023221

In vitro and in silico Antifungal Activity of Metabolites from Bredemeyera brevifolia (Benth.) Klotzsch ex A.W. Benn. Benth. Benth (Benth. AW A W A.W Benn (Benth
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Barreto, Rubens S.

; Costa, Diego M. da

; Sousa, Jailan S.

; Jesus, Vilisaimon S. de

; Silva, Agnaldo P. da

; Buonafina-Paz, Maria Daniela S.

; Santos, Franz A. G. dos

; Neves, Rejane P.

; Pastore, José F. B.

; Andrade, Bruno S.

; Soares, Wagner R. A.

; Brandão, Hugo N.

; Aguiar, Rosane M.

; Alves, Clayton Q.

Journal of the Brazilian Chemical Society

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2025, Volume 36 Nº 3 elocation e-20240158

Resumo: En | Texto: En | PDF: En

Bredemeyera Willd. is a genus of the Polygalaceae family, occurring in Brazil. This research aims to evaluate the phytochemical and antifungal potential, in vitro and in silico, of Bredemeyera brevifolia extracts. The identification of fatty acids by gas chromatography-mass spectrometry and their quantification by gas chromatography-flame ionization detector showed that palmitic (36.55 mg g−1), margaric (3.66 mg g−1), linolelaidic (108.82 mg g−1), oleic (7.86 mg g−1), stearic (41.11 mg g−1), dihomo-γ-linolenic (85.48 mg g−1), and arachidic (209.00 mg g−1) acids are present in the hexane extract. From the chloroform extract, 1-hydroxy-3,7-dimethoxyxanthone was isolated and identified. The minimum inhibitory concentration assay with methanolic extract demonstrated antifungal activity against species of the genus Candida, Sporothrix, and Trichophyton for up to 96 h, with values ranging from 64-1024 μg mL−1. The in silico study with the chemical compounds of this species showed fungal inhibition potential of sterol-14-α-demethylase, highlighting 1-hydroxy-3,7-dimethoxyxanthone, which presented an affinity energy of -8.8 kcal mol−1, greater than that observed for fluconazole (−8.3 kcal mol−1). The fatty acids interacted with the active site of the enzyme but presented energies ≥ −7.4 kcal mol−1. Compounds isolated from this species have pharmacokinetic potential for the development of pharmaceutical formulations. Willd family Brazil extracts chromatographymass chromatography mass chromatographyflame flame 36.55 3655 36 55 (36.5 g−1, g1 g g−1 , 1 3.66 366 3 66 (3.6 108.82 10882 108 82 (108.8 7.86 786 7 86 (7.8 41.11 4111 41 11 (41.1 dihomoγlinolenic dihomo γ linolenic 85.48 8548 85 48 (85.4 209.00 20900 209 00 (209.0 1hydroxy3,7dimethoxyxanthone 1hydroxy37dimethoxyxanthone hydroxydimethoxyxanthone hydroxy 3,7 dimethoxyxanthone identified Candida Sporothrix 9 h 641024 64 1024 64-102 mL1 mL mL−1 sterol14αdemethylase, sterol14αdemethylase sterolαdemethylase sterol 14 α demethylase, demethylase sterol-14-α-demethylase 1hydroxy3,7dimethoxyxanthone, dimethoxyxanthone, 8.8 88 8 -8. mol1 mol mol−1 −8.3 83 (−8. . mol−1) 74 4 −7. formulations 36.5 365 5 (36. g− 3.6 6 (3. 108.8 1088 10 (108. 7.8 78 (7. 41.1 411 (41. 85.4 854 (85. 209.0 2090 20 0 (209. 1hydroxy3 7dimethoxyxanthone 37 3, 64102 102 64-10 mL− αdemethylase 8. -8 mol− −8. (−8 −7 36. (36 3. (3 108. (108 7. (7 41. (41 85. (85 209. 2 (209 1hydroxy 6410 64-1 - −8 (− − ( (10 (4 (8 (20 641 64- (1 (2

https://doi.org/10.21577/0103-5053.20240158

EFEITO DAS DOSES DE DEJETO LÍQUIDO DE SUÍNOS NOS ATRIBUTOS FÍSICOS, QUÍMICOS E ELETROQUÍMICOS EM UM LATOSSOLO DO CERRADO FÍSICOS
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Silva, Raysa Trindade da

; Jesus, Wagner Arruda de

; Soares, Mário Rodrigo dos Santos

; Barros, Ariane Isis

; Weber, Oscarlina Lúcia dos Santos

Química Nova

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2025, Volume 48 Nº 1 elocation e-20250004

Resumo: Pt | Texto: Pt | PDF: Pt

EFFECT OF LIQUID SWINE WASTEWATER DOSES ON PHYSICAL, CHEMICAL AND ELECTROCHEMICAL ATTRIBUTES IN A CERRADO OXISOL. The addition of organic residues enhances soil and plant organic matter and nutrient content. To gauge the impact of varying liquid swine waste (LSW) levels on soil, we studied changes in a clayey Oxisol’s physical, chemical, and electrochemical traits from the Cerrado. LSW doses (0, 50, 150, 450, 600 m3 ha−1) were applied to the 0-0.20 m layer in a randomized design with three replicates. Post a 30-day incubation at 60% field capacity, the soil underwent mineralogical, physical (clay dispersed in water - CDW), chemical (sodium adsorption ratio - SAR, cation exchange capacity - CEC, base saturation - V%), and electrochemical (pH in H2O and KCl, ApH, point of zero charge - PZC, point of zero salt effect - PZSE, surface electric potential - iµo, and electrical conductivity - EC) analyses. The levels of exchangeable Ca, K, Mg, Na, and available P increased with increasing LSW doses. Increasing LSW doses in the soil led to an increase in EC, but soil salinization was not observed at the highest dose. With the application of LSW doses, there was a decrease in pH, ApH, PZSE, and an increase in CEC, PZC and ψo. Despite the increase in ψo, low clay dispersibility was observed. PHYSICAL OXISOL content (LSW Oxisols Oxisol s Cerrado 0, 0 (0 50 150 450 60 ha−1 ha1 ha 1 00.20 0020 0.20 20 0-0.2 replicates 30day day 30 mineralogical CDW, CDW , CDW) sodium SAR CEC V%, V V% V%) pH HO H O KCl ApH PZSE iµo EC analyses Ca K Mg Na dose ψo ( 5 15 45 6 ha− 00 00.2 002 020 0.2 2 0-0. 3 4 00. 02 0. 0-0 0-

https://doi.org/10.21577/0100-4042.20250004

Características clínicas y demográficas del pie diabético complicada con infección en un Hospital Regional de Paraguay
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Gill-Peralta, Virgilio Javier

; Lescano-Rivas, Lourdes Giselle

; Leiva-Florentín, Álvaro Daniel

; González-Do Santos, Lourdes Marlene

; Escobar-Salinas, Jorge Sebastián

Revista del Instituto de Medicina Tropical

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Jun 2024, Volume 19 Nº 1 Páginas 1 - 9

Resumo: En Es | Texto: En Es | PDF: En | PDF: Es

ABSTRACT Objective: To describe the clinical and demographic characteristics of patients hospitalized with diabetic foot complicated with infection in the medical clinic service of the Regional Hospital of Coronel Oviedo, Paraguay during the year 2021. Materials and methods: A cross-sectional descriptive observational study was carried out, with non-probabilistic sampling of consecutive cases of patients over 18 years of age diagnosed with diabetic foot admitted to the medical clinic service of the Regional Hospital of Paraguay during the year 2021, where the Variables were age, Wagner grade, first and second targeted antibiotic, and type of surgical procedure. Results: 76 patients were included, 57% were male. According to the Wagner classification, 36 patients (47%) had a Wagner grade IV and 20 patients (26%) had a Wagner grade III. Treatment was conservative in 53% (n=41). 30% (n=23) required phalangeal amputation and 6% (n=5) required infracondylar amputation. Conclusion: Most of them were male, in turn most of them were Wagner grades III and IV. Among patients who required surgery, phalangeal amputations were the most common procedure. Regarding therapeutic treatment, the use of beta-lactams and anaerobic medications predominated.

RESUMEN Objetivo: Describir las características clínicas y demográficas de los pacientes internados con pie diabético complicada con infección en el servicio de clínica médica del Hospital Regional de Coronel Oviedo, Paraguay durante el año 2021. Materiales y métodos: Se realizó un estudio observacional descriptivo de corte transversal, con muestreo no probabilístico de casos consecutivos de pacientes mayores de 18 años diagnosticados con pie diabético internados en el servicio de clínica médica del Hospital Regional de Paraguay durante el año 2021, donde las variables fueron la edad, grado de Wagner, primer y segundo antibiótico dirigido y tipo de procedimiento quirúrgico. Resultados: Fueron incluidos 76 pacientes, el 57% fue del sexo masculino. De acuerdo con la clasificación de Wagner 36 pacientes (47%) tenían un grado de Wagner IV y 20 pacientes (26%) un grado de Wagner III. El tratamiento fue conservador en el 53% (n=41). El 30% (n=23) requirió amputación de las falanges y el 6% (n=5) requirió amputación infracondílea. Conclusión: En su mayoría fueron del sexo masculino, a su vez en su mayoría fueron los grados III y IV de Wagner. Entre los pacientes que necesitaron cirugía, las amputaciones de falanges fueron el procedimiento más común. En cuanto al tratamiento terapéutico predominó el uso de betalactámicos y medicamentos anaeróbicos.

https://doi.org/10.18004/imt/2024.19.1.1

Storability of landrace fava bean seeds in different packaging materials
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Santos, Wagner Fabian Gonçalves

; Silva Junior, Delacyr Brandão da

; Gama, Aldenir Teixeira da

; Costa, Cândido Alves da

; Alves, Érika Endo

Ciência Rural

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2024, Volume 54 Nº 5 elocation e20210774

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO: O presente trabalho teve por objetivo avaliar por meio de testes físicos e fisiológicos a qualidade das sementes de uma variedade crioula de feijão-fava em diferentes embalagens. (1 -Embalagem cartonada mista composta por camadas de plástico, papel cartão e folha de alumínio impermeável- CN; 2- garrafa plástica semipermeável - PET;3- Pote plástico rígido impermeável - PEAD; 4- pote de vidro transparente quebrável impermeável - VIDRO; 5- saco plástico flexível impermeável PEBD aluminizado; 6- saco de papel permeável) e períodos de armazenamento de (90, 180, 270 e 360 dias), visando garantir a conservação da qualidade delas em casas e bancos de sementes. A metodologia utilizada foi a preconizada pelas Regras de Análise de Sementes (RAS - Brasil, 2009) e por descritores mínimos para Phaseolus lunatus L. Os dados foram submetidos a análise de variância pelo teste F ao nível de 5 %, afim de verificar a presença de interação significativa e dos efeitos simples de cada tratamento. Foi realizado o teste de comparação múltipla das médias pelos testes Tukey ao nível de 5 % de significância entre os tratamentos comuns. Para comparar as médias da testemunha com os tratamentos comuns recorreu-se ao teste Dunnett ao nível de 5 % de significância. Para estudar o efeito do armazenamento sobre as variáveis avaliadas foi feita a análise de regressão. Todas as análises foram feitas com o auxílio do R por meio de programação. Pelos resultados, pode-se concluir que o armazenamento de sementes de feijão-fava: é viável em pequenas propriedades rurais em embalagem impermeável; saco de polietileno aluminizada. A germinação e o vigor das sementes analisadas diminuíram ao longo do período de armazenamento, independentemente do tipo de embalagem utilizada. Não é recomendado armazenar sementes de feijão-fava em embalagens permeáveis de papel por apresentaram os menores índices de qualidade (germinação e vigor) ao final do período de armazenamento. RESUMO feijãofava feijão fava 1 ( Embalagem CN 2 PET3 PET 3 PET;3 PEAD 4 VIDRO aluminizado 6 permeável 90, 90 (90 180 27 36 dias, dias , dias) RAS Brasil 2009 L tratamento recorreuse recorreu se regressão programação resultados podese pode aluminizada PET; 9 (9 18 200 20

ABSTRACT: The present study evaluated, through physical and physiological tests, the seed quality of a landrace fava bean variety in different packaging materials and storage periods, aiming to guarantee the conservation of their quality in seed banks and facilities. The methodology used was the one recommended by the Rules for Seed Analysis (RAS - Brasil, 2009) and minimum descriptors for Phaseolus lunatus L. The data were subjected to analysis of variance by the F-test at 5% signififance to verify the presence of significant interactions and the individual effects of each treatment. The test of multiple comparison of means was performed by the Tukey test at 5% significance between common treatments. The Dunnett test was used at 5% significance to compare the control means with the means of the treatments. Regression analysis was performed to study the effect of storage on the variables evaluated. All analyses were performed using the R software. From the results, it can be concluded that the storage of fava bean seeds is viable in small rural properties in impermeable packaging materials and aluminized polyethylene bags. The germination and vigor of the seeds analyzed in this study decreased throughout the storage period regardless of the type of packaging used. It is not recommended to store fava bean seeds in permeable paper packaging as they have the lowest quality indices (germination and vigor) at the end of the storage period. ABSTRACT evaluated tests periods facilities RAS Brasil 2009 L Ftest F 5 treatment treatments software results bags 200 20 2

https://doi.org/10.1590/0103-8478cr20210774

Solidariedade como política: Saúde Global e democracia
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Furtado, Juarez Pereira

; Almeida, Ernesto Monteiro de

; Santos, Gabriel Pinto dos

; Ramalho, Simone Aparecida

; Oda, Wagner Yoshizaki

Ciência & Saúde Coletiva

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2024, Volume 29 Nº 7 elocation e03802024

Resumo: En Pt | Texto: En Pt | PDF: En | PDF: Pt

Abstract Ensuring democracy in establishing Global Health (GH) requires including health perspectives and actions of what is conventionally called “local”. Edging closer to the references of the Meeting of Knowledges to those of Coloniality, we address the implementation of Solidary Greengrocers by the initiative of small-scale fishermen in the South of Bahia, Brazil, in facing socioeconomic and health issues related to the COVID-19 pandemic. The triangulation of methods characterized the fieldwork based on ethnography, action research, and partnership with local stakeholders in analyzing the material. The search for simultaneous health, socioeconomic, environmental, and educational effects allowed for overcoming the risks in GH actions such as humanitarianism, controlism, neoliberalism, and colonialism. The initiative was managed by the political organization of the residents of the reserve, who raised and managed State and civil society resources with autonomy and solidarity, combining traditional knowledge with institutional and technological knowledge of the territory. So-called local experiences contain a complete vision of the world that should not be submitted to a totalizing category. Global Health can benefit from considering the several worlds underlying its object.

Resumo Garantir a democracia na constituição do campo da Saúde Global (SG) requer a inclusão de perspectivas e ações sanitárias do que se convencionou chamar de “local”. Aproximando os referenciais do Encontro de Saberes ao de Colonialidade, abordamos a implementação de Quitandas Solidárias por iniciativa de pescadores artesanais, no sul da Bahia, no enfrentamento de questões socioeconômicas e de saúde ligadas à pandemia de COVID-19. A triangulação de métodos caracterizou os trabalhos de campo, baseados na etnografia, pesquisa-ação e parceria com agentes locais na análise do material. A busca de efeitos simultaneamente sanitários, socioeconômicos, ambientais e educativos possibilitou relativa superação dos riscos presentes nas ações de SG como os de humanitarismo, controlismo, neoliberalismo e colonialismo. A iniciativa foi gerida pela organização política dos moradores da reserva, que captaram e manejaram recursos do Estado e da sociedade civil com autonomia e solidariedade, aliando os saberes tradicionais aos conhecimentos institucionais e tecnológicos do território. As experiências ditas locais contêm uma visão completa de mundo que não devem ser submetidas a uma categoria totalizante. A Saúde Global pode se beneficiar da consideração dos diversos mundos que constituem o seu objeto.

https://doi.org/10.1590/1413-81232024297.03802024

Analyzing the Fatigue Behavior of the β-Type Ti-15Mo Biomedical Alloy After Surface Modification with Laser βType β Type Ti15Mo TiMo Ti 15Mo Mo
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Campanelli, Leonardo Contri

; Oliveira, Vinicius Santos de

; Bezerra, Ana Flávia

; Simon, Rafael Wagner

; Ambrozini, Beatriz

; Guastaldi, Antonio Carlos

; Reis, Danieli Aparecida Pereira

Materials Research

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2024, Volume 27 elocation e20240244

Resumo: En | Texto: En | PDF: En

Modifying the surface of titanium alloys with a laser considerably increases the specific area, which has beneficial implications for the osseointegration process. In this study, Yb:YAG laser was used to modify the surface of the commercial β-type Ti-15Mo alloy. The process parameters used were based on a suitable osseointegration condition for this treatment. The effect of such modification on the fatigue performance of the alloy was analyzed. To assess the impact of surface modification on the alloy’s fatigue performance, axial fatigue tests were conducted on specimens with both polished and laser-modified surfaces (R = 0.1). Fatigue strength was evaluated using a staircase method, where specimens were subjected to varying maximum stress levels to determine the fatigue limit after 5x106 cycles. The results showed that the laser-modified surface presented cavities and roughness values such that the effect on fatigue was highly detrimental. A reduction of around 75% in the fatigue limit (maximum stress) was obtained, indicating that modifying the Ti-15Mo alloy with laser for medical purposes may require integrated biological-mechanical development. area study YbYAG Yb YAG βtype β type Ti15Mo TiMo Ti 15Mo Mo treatment analyzed s lasermodified modified R 0.1. 01 0.1 . 0 1 0.1) method x 5x10 cycles detrimental 75 obtained biologicalmechanical biological mechanical development 0. 5x1 7 5x

https://doi.org/10.1590/1980-5373-mr-2024-0244

Safety of CoronaVac and ChAdOx1 vaccines against SARS-CoV-2 in patients with rheumatoid arthritis: data from the Brazilian multicentric study safer ChAdOx SARSCoV2 SARSCoV SARS CoV 2 SARS-CoV- arthritis SARS-CoV
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Cruz, Vitor Alves

; Guimarães, Camila

; Rêgo, Jozelia

; Machado, Ketty Lysie Libardi Lira

; Miyamoto, Samira Tatiyama

; Burian, Ana Paula Neves

; Dias, Laiza Hombre

; Pretti, Flavia Zon

; Batista, Danielle Cristina Filgueira Alves

; Mill, José Geraldo

; Oliveira, Yasmin Gurtler Pinheiro de

; Gadelha, Carolina Strauss Estevez

; Gouveia, Maria da Penha Gomes

; Moulin, Anna Carolina Simões

; Souza, Bárbara Oliveira

; Aguiar, Laura Gonçalves Rodrigues

; Vieira, Gabriel Smith Sobral

; Grillo, Luiza Lorenzoni

; Lima, Marina Deorce de

; Pasti, Laís Pizzol

; Surlo, Heitor Filipe

; Faé, Filipe

; Moulaz, Isac Ribeiro

; Macabú, Mariana de Oliveira

; Ribeiro, Priscila Dias Cardoso

; Magalhães, Vanessa de Oliveira

; Aguiar, Mariana Freitas de

; Biegelmeyer, Erika

; Peixoto;, Flávia Maria Matos Melo Campos

; Kayser, Cristiane

; Souza, Alexandre Wagner Silva de

; Castro, Charlles Heldan de Moura

; Ribeiro, Sandra Lúcia Euzébio

; Telles, Camila Maria Paiva França

; Bühring, Juliana

; Lima, Raquel Lima de

; Santos, Sérgio Henrique Oliveira Dos

; Dias, Samuel Elias Basualto

; Melo, Natália Seixas de

; Sanches, Rosely Holanda da Silva

; Boechat, Antonio Luiz

; Sartori, Natália Sarzi

; Hax, Vanessa

; Dória, Lucas Denardi

; Rezende, Rodrigo Poubel Vieira de

; Baptista, Katia Lino

; Fortes, Natália Rodrigues Querido

; Melo, Ana Karla Guedes de

; Melo, Tâmara Santos

; Vieira, Rejane Maria Rodrigues de Abreu

; Vieira, Adah Sophia Rodrigues

; Kakehasi, Adriana Maria

; Tavares, Anna Carolina Faria Moreira Gomes

; Landa, Aline Teixeira de

; Costa, Pollyana Vitoria Thomaz da

; Azevedo, Valderilio Feijó

; Martins-Filho, Olindo Assis

; Peruhype-Magalhães, Vanessa

; Pinheiro, Marcelo de Medeiros

; Monticielo, Odirlei André

; Reis-neto, Edgard Torres Dos

; Ferreira, Gilda Aparecida

; Souza, Viviane Angelina de

; Teixeira-Carvalho, Andréa

; Xavier, Ricardo Machado

; Sato, Emilia Inoue

; Valim, Valeria

; Pileggi, Gecilmara Salviato

; Silva, Nilzio Antonio da

Advances in Rheumatology

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2024, Volume 64 elocation 58

Resumo: En | Texto: En | PDF: En

Abstract Background Patients with immune-mediated rheumatic diseases (IMRDs) have been prioritized for COVID-19 vaccination to mitigate the infection severity risks. Patients with rheumatoid arthritis (RA) are at a high risk of severe COVID-19 outcomes, especially those under immunosuppression or with associated comorbidities. However, few studies have assessed the safety of the COVID-19 vaccine in patients with RA. Objective To evaluate the safety of vaccines against SARS-CoV-2 in patients with RA. Methods This data are from the study “Safety and Efficacy on COVID-19 Vaccine in Rheumatic Diseases,” a Brazilian multicentric prospective phase IV study to evaluate COVID-19 vaccine in IMRDs in Brazil. Adverse events (AEs) in patients with RA of all centers were assessed after two doses of ChAdOx1 (Oxford/AstraZeneca) or CoronaVac (Sinovac/Butantan). Stratification of postvaccination AEs was performed using a diary, filled out daily and returned at the end of 28 days for each dose. Results A total of 188 patients with RA were include, 90% female. CoronaVac was used in 109 patients and ChAdOx1 in 79. Only mild AEs were observed, mainly after the first dose. The most common AEs after the first dose were pain at the injection (46,7%), headache (39,4%), arthralgia (39,4%), myalgia (30,5%) and fatigue (26,6%), and ChAdOx1 had a higher frequency of pain at the injection (66% vs 32 %, p < 0.001) arthralgia (62% vs 22%, p < 0.001) and myalgia (45% vs 20%, p < 0.001) compared to CoronaVac. The more common AEs after the second dose were pain at the injection (37%), arthralgia (31%), myalgia (23%), headache (21%) and fatigue (18%). Arthralgia (41,4% vs 25%, p = 0.02) and pain at injection (51,4% vs 27%, p = 0.001) were more common with ChAdOx1. No serious AEs were related. With Regard to RA activity level, no significant difference was observed between the three time periods for both COVID-19 vaccines. Conclusion In the comparison between the two immunizers in patients with RA, local reactions and musculoskeletal symptoms were more frequent with ChAdOx1 than with CoronaVac, especially after the first dose. In summary, the AE occurred mainly after the first dose, and were mild, like previous data from others immunizing agents in patients with rheumatoid arthritis. Vaccination did not worsen the degree of disease activity. immunemediated immune mediated (IMRDs COVID19 COVID 19 COVID-1 risks (RA outcomes comorbidities However SARSCoV2 SARSCoV SARS CoV 2 SARS-CoV- Safety Diseases, Diseases Brazil (AEs ChAdOx Oxford/AstraZeneca OxfordAstraZeneca Oxford AstraZeneca (Oxford/AstraZeneca Sinovac/Butantan. SinovacButantan Sinovac/Butantan . Sinovac Butantan (Sinovac/Butantan) diary 18 include 90 female 10 79 46,7%, 467 46,7% , 46 7 (46,7%) 39,4%, 394 39,4% 39 4 (39,4%) 30,5% 305 30 5 (30,5% 26,6%, 266 26,6% 26 6 (26,6%) 66% 66 (66 3 % 0.001 0001 0 001 62% 62 (62 22 22% 45% 45 (45 20 20% 37%, 37 37% (37%) 31%, 31 31% (31%) 23%, 23 23% (23%) 21% 21 (21% 18%. 18% (18%) 41,4% 414 41 (41,4 25 25% 0.02 002 02 51,4% 514 51 (51,4 27 27% related level summary COVID1 1 COVID- SARS-CoV (Sinovac/Butantan 9 46,7 (46,7% 39,4 (39,4% 30,5 (30,5 26,6 (26,6% (6 0.00 000 00 (4 (37% (31% (23% (21 (18% 41,4 (41, 0.0 51,4 (51, 46, (46,7 39, (39,4 30, (30, 26, (26,6 ( (37 (31 (23 (2 (18 41, (41 0. 51, (51 (46, (39, (30 (26, (3 (1 (5 (46 (39 (26

https://doi.org/10.1186/s42358-024-00397-5

Reproducibility and reliability of pressure algometry: are digital and analogue devices comparable? algometry comparable
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Oliveira, Natália Cristina de

; Silva, Klara Reis

; Santos, Adna Costa

; Alfieri, Fábio Marcon

BrJP

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2024, Volume 7 elocation e20240055

Resumo: En Pt | Texto: En Pt | PDF: En | PDF: Pt

ABSTRACT BACKGROUND AND OBJECTIVES: Digital and analogue algometry have been widely employed in clinical studies, but a recent investigation observed a systematic error between devices, which may hinder comparison of data from different studies. The objective of this study was to evaluate the reproducibility and reliability of analogue and digital algometers. METHODS: This was an observational transversal study involving 40 healthy adults. They had preserved cognitive capacity and no chronic or acute pain. Participants were submitted to pressure pain threshold (PPT) assessment by two different algometers, 15 minutes apart: a digital device (Wagner Pain Test FPX) and an analogue one (Wagner Force Dial). Data collection involved 2 evaluators and occurred once a week. The muscles evaluated were teres major, upper trapezius, elevator scapulae, supraspinatus, infraspinatus, pectoralis, middle gluteus, paraspinal and deltoid. RESULTS: Reliability between the measurements taken by the same evaluator (intra-rater reliability) or with the same device (inter-rater reliability) on different days was analyzed using the Intraclass Correlation Coefficient (ICC). When comparing the intra-rater reliability (evaluator 1, weeks 1 and 3), good or excellent reproducibility was observed in most of the sites, with both analogue and digital algometers, with statistical significance. The inter-device reliability (digital and analogue algometers) showed a significant and excellent correlation (r > 0.75) in all evaluated sites for both evaluators. The analysis of inter-rater reliability (2 different evaluators) for the digital algometer revealed good or excellent significant correlation in almost all sites, except for the left pectoralis major. For the analogue algometer, all evaluated sites exhibited good or excellent correlation with statistical significance. CONCLUSION: The data highlight that digital and analogue algometry have good intra-rater reliability (reproducibility), inter-device reliability and inter-rater reliability in a sample of healthy young individuals. OBJECTIVES studies devices algometers METHODS 4 adults PPT (PPT apart Wagner FPX Dial. Dial . Dial) week major trapezius scapulae supraspinatus infraspinatus gluteus deltoid RESULTS intrarater intra rater interrater inter ICC. ICC (ICC) 3, 3 , 3) significance interdevice r 0.75 075 0 75 ( CONCLUSION reproducibility, (reproducibility) individuals (ICC 0.7 07 7 (reproducibility 0.

RESUMO JUSTIFICATIVA E OBJETIVOS: A algometria digital e a analógica têm sido amplamente utilizadas em estudos clínicos, mas uma investigação recente observou um erro sistemático entre os dispositivos, o que pode dificultar a comparação de dados de diferentes estudos. O objetivo deste estudo foi avaliar a reprodutibilidade e a confiabilidade de algômetros analógicos e digitais. MÉTODOS: Este foi um estudo transversal observacional que envolveu 40 estudantes saudáveis. Eles tinham capacidade cognitiva preservada e não apresentavam dor crônica ou aguda. Os participantes foram submetidos à avaliação do limiar de tolerância à dor por pressão (LTDP) por dois algômetros diferentes, com 15 minutos de intervalo: um algômetro digital (Wagner Pain Test FPX) e um analógico (Wagner Force Dial). A coleta de dados envolveu dois avaliadores e ocorreu uma vez por semana. Os músculos avaliados foram o redondo maior, o trapézio superior, o levantador da escápula, o supraespinhal, o infraespinhal, o peitoral, o glúteo médio, o paraespinhal e o deltoide. RESULTADOS: A confiabilidade entre as medidas realizadas pelo mesmo avaliador (confiabilidade intra-avaliador) ou com o mesmo aparelho (confiabilidade interavaliador), em dias diferentes, foi analisada por meio do Coeficiente de Correlação Intraclasse (CCI). Ao comparar a confiabilidade intra-avaliador (avaliador 1, semanas 1 e 3), observou-se reprodutibilidade boa ou excelente na maioria dos sítios, tanto com algômetro analógico quanto digital, com significância estatística. A confiabilidade interdispositivos (algômetro digital e analógico) apresentou correlação significativa e excelente (r > 0,75) em todos os locais avaliados e para ambos os avaliadores. A análise da confiabilidade interavaliadores (2 avaliadores diferentes) para o algômetro digital revelou correlação significativa boa ou excelente em quase todos os locais, exceto no peitoral maior esquerdo. Para o algômetro analógico, todos os locais avaliados apresentaram correlação boa ou excelente com significância estatística. CONCLUSÃO: Os dados destacam que a algometria digital e a analógica apresentam boa confiabilidade intra-avaliador (reprodutibilidade), confiabilidade entre dispositivos e confiabilidade entre avaliadores em uma amostra de jovens saudáveis. OBJETIVOS clínicos digitais MÉTODOS 4 saudáveis aguda LTDP (LTDP intervalo Wagner FPX Dial. Dial . Dial) semana superior escápula supraespinhal infraespinhal médio deltoide RESULTADOS intraavaliador intra interavaliador, interavaliador , interavaliador) CCI. CCI (CCI) 3, 3 3) observouse se sítios estatística r 0,75 075 0 75 2 ( esquerdo CONCLUSÃO reprodutibilidade, (reprodutibilidade) (CCI 0,7 07 7 (reprodutibilidade 0,

https://doi.org/10.5935/2595-0118.20240055-en

10.

Construct Validity and Reliability of the Scale of Attitudes towards External Assessments Applied on a Large Scale
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Soares, Denilson Junio Marques

; Prado, Wallacy Campos

; Soares, Talita Emidio Andrade

; Santos, Wagner dos

Paidéia (Ribeirão Preto)

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2024, Volume 34 elocation e3410

Resumo: Es Pt En | Texto: Es Pt En | PDF: Es | PDF: Pt | PDF: En

Resumen La Escala de Actitudes ante las Evaluaciones Externas aplicadas a Gran Escala se desarrolló para identificar lo que el profesorado de educación básica piensa, siente y hace frente a este tipo de evaluación. Teniendo en cuenta el potencial del instrumento para respaldar las decisiones gerenciales en las políticas de evaluación educativa, este artículo tuvo como objetivo evaluar la validez del constructo, mediante el análisis factorial, y la confiabilidad, mediante la fiabilidad compuesta de la escala, basándose en su aplicación a una muestra de profesores de la Red de Educación de Espírito Santo/Brasil. Se trata de un estudio cuantitativo, no experimental, de naturaleza instrumental, que involucró a 405 docentes; y los resultados indican índices psicométricos adecuados y una estructura factorial satisfactoria y coherente con la propuesta tridimensional del constructo de actitudes. Los coeficientes estadísticos encontrados a partir de los análisis realizados legitiman su uso para el desarrollo de políticas públicas y prácticas efectivas en el campo educativo. piensa educativa confiabilidad escala SantoBrasil Santo Brasil Santo/Brasil cuantitativo experimental instrumental 40 docentes actitudes educativo 4

Resumo A Escala de Atitudes perante as Avaliações Externas aplicadas em Larga Escala foi desenvolvida para capturar o que os professores da educação básica pensam, sentem e se comportam mediante esse tipo de avaliação. Considerando as potencialidades do instrumento para subsidiar decisões gerenciais no âmbito das políticas de avaliação educacional, esta pesquisa objetivou avaliar a validade do construto, mediante a Análise Fatorial, e a confiabilidade da escala, por meio da fidedignidade composta, a partir da aplicação para uma amostra de professores vinculados à Secretaria de Educação do Espírito Santo/Brasil. Trata-se de um estudo quantitativo, não experimental, de cunho instrumental, que envolveu 405 docentes da rede, cujos resultados indicam para adequados índices psicométricos e uma estrutura fatorial satisfatória e condizente com a proposta tridimensional do construto atitudes. Os coeficientes estatísticos encontrados ao nível das análises realizadas legitimam sua utilização para o desenvolvimento de políticas e práticas efetivas no âmbito educacional. pensam educacional Fatorial escala composta SantoBrasil Santo Brasil Santo/Brasil Tratase Trata quantitativo experimental instrumental 40 rede atitudes 4

Abstract The Scale of Attitudes towards External Assessments applied on a Large-Scale was developed to capture what basic education teachers think, feel, and how they behave in response to this type of assessment. Considering the potential of the instrument to support management decisions in the field of educational assessment policies, this article aimed to evaluate construct validity, via factor analysis, as well as scale reliability, via composite reliability of the scale, based on its application to a sample of teachers affiliated with the Education Department of Espírito Santo/Brazil. This is a quantitative, nonexperimental, instrumental study that involved 405 teachers from the public school network, whose results indicate adequate psychometric indices and a satisfactory factor structure consistent with the proposed three-dimensional attitude construct. The statistical coefficients found at the level of the analyses performed legitimize its use for the development of public policies and effective practices in the educational field. LargeScale Large think feel validity analysis SantoBrazil Santo Brazil Santo/Brazil quantitative nonexperimental 40 network threedimensional three dimensional 4

https://doi.org/10.1590/1982-4327e3410

11.

The Politics of Agribusiness in Brazil: Business Power and Political Success during the 55th Legislature (2015-2019) Brazil th 20152019 2015 2019 (2015-2019 2015201 201 (2015-201 201520 20 (2015-20 20152 2 (2015-2 (2015- (2015 (201 (20 (2 (
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Mancuso, Wagner Pralon

; Resende, Ciro Antônio da Silva

; Silva, Lucas Henrique Ribeiro da

; Prado, João Felype Vieira

; Santos, Ana Luiza Ormeni Almeida dos

Brazilian Political Science Review

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2024, Volume 18 Nº 2 elocation e0002

Resumo: En | Texto: En | PDF: En

This paper addresses two central issues during the 55th legislature (2015-2019). First, the relationship between the instrumental and structural power of agribusiness and different aspects of parliamentary behavior, namely membership in standing committees and the introduction of legislative bills. Second, the level of success achieved by agribusiness in relation to the legislative production of the National Congress. Concerning the first question, we employed binary logistic regression to demonstrate that deputies who received the most campaign financing from agribusiness (an indicator of instrumental political power), and whose voters were highly dependent on agribusiness as a source of employment (an indicator of structural political power), were more likely to secure seats in the Committee on Agriculture, Livestock, Food Supply, and Rural Development (CAPADR). We also employed negative binomial regression to demonstrate that deputies whose constituents were more dependent on jobs created by the sector (structural political power) introduced a greater number of bills favorable to the sector, while introducing fewer bills contrary to its interests. Regarding the second issue, we utilized statistical techniques such as the chi-squared test and the analysis of adjusted residuals to compare the stance of the Agricultural Parliamentary Front (APF) with the decisions of the National Congress on bills concluded during the 55th Legislature. Our findings suggest that agribusiness attained success in the vast majority of decisions resulting in new laws, although many bills supported by the sector had different outcomes. In summary, the 55th Legislature demonstrated a high degree of receptiveness to the interests of agribusiness. However, while the interests of agribusiness wield considerable influence in the Brazilian Congress, this influence is far from all-encompassing. th 20152019. 20152019 2015 2019 . (2015-2019) First behavior Second question an power, , Agriculture Livestock Supply CAPADR. CAPADR (CAPADR) issue chisquared chi squared APF (APF laws outcomes summary However allencompassing. allencompassing all encompassing. encompassing all-encompassing 2015201 201 (2015-2019 (CAPADR 201520 20 (2015-201 20152 2 (2015-20 (2015-2 (2015- (2015 (201 (20 (2 (

https://doi.org/10.1590/1981-3821202400020002

12.

Artificial neural networks for predicting backwashing in screen filters for irrigation
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Passos, Mádilo Lages Vieira

; Sousa, Alan Bernard Oliveira de

; Teixeira, Adunias dos Santos

; Oliveira, Carlos Wagner

Revista Ciência Agronômica

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2024, Volume 55 elocation e20228335

Resumo: En | Texto: En | PDF: En

ABSTRACT Careful implementation of a filtration system is essential for maintaining the operation of an irrigation system. Failure to maintain a filtration system can have a negative eff ect on irrigation pressure and uniformity. To avoid this problem, it is important to clean the filters, which can be done either manually or automatically. Predicting the correct time to clean the filters helps maintain the pressure and efficiency of the system. The aim of this study was to model backwash pressure as a function of water quality and the filter inlet pressure load using artificial neural networks. The characteristics of the water were determined using sensors to measure the pH (hydrogen potential), turbidity, total dissolved solids (TDS), and temperature. A pressure transducer was used to quantify the drop in pressure and the need to clean the filters. To predict the need for cleaning the irrigation filters, a hydraulic structure was constructed that included a screen filtration system with a mesh size of 120, cleaned by backwashing. The need for cleaning estimated by the multilayer perceptron feedforward artificial neural networks with 2-4-1 architecture performed well in modelling the temporal evolution of the pressure load in the screen filtration system (120 mesh), whereas adjusting the pressure load based on the water quality characteristics (pH, turbidity, total dissolved solids and temperature) performed poorly. uniformity problem automatically hydrogen potential, potential , potential) turbidity TDS, TDS (TDS) temperature 120 backwashing 241 2 4 1 2-4- (12 mesh, mesh) pH, (pH poorly (TDS 12 24 2-4 (1 2- (

https://doi.org/10.5935/1806-6690.20240035

13.

Lycophytes and ferns of an Amazonian-Cerrado ecotone in Maranhão State, Northeastern Brazil: identification key and annotated list of taxa. AmazonianCerrado Amazonian Cerrado State Brazil taxa
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Silva Junior, Wagner Ribeiro da

; Prado, Jefferson

; Ferreira, Alessandro Wagner Coelho

; Fernandes, Rozijane Santos

; Oliveira, Hermeson Cassiano de

Biota Neotropica

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2024, Volume 24 Nº 2 elocation e20231564

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo Apresentamos uma chave para a identificação e uma lista com detalhes das licófitas e samambaias da Região Geográfica Imediata de São Luís, Estado do Maranhão, que possui características ecotonais da Floresta Amazônica, Cerrado e Vegetação Litorânea. Os dados foram coletados mensalmente entre abril de 2020 e setembro de 2022 nos 13 municípios dessa região. Foram identificadas 64 espécies, incluindo 61 espécies de samambaias, em 18 famílias e 38 gêneros, e três espécies de licófitas, em dois gêneros e uma família. As famílias mais representativas foram Pteridaceae (18 espécies) e Polypodiaceae (nove espécies). O substrato de ocorrência mais registrado foi o terrestre com 35 espécies (54,6%), seguido do epifítico com 15 espécies (23,4%), aquático com quatro espécies (6,2%), rupícola com três espécies (4,6%) e hemiepifítico com duas espécies (3,1%). Cinco espécies (7,8%) apresentaram mais de uma forma de vida. Este estudo amplia o conhecimento sobre a distribuição geográfica de espécies de samambaias e licófitas na região central do norte do Maranhão, no Nordeste do Brasil, que até então possuía várias lacunas de amostragem. O Maranhão possui uma diversidade ainda pouco relatada e conhecida em comparação com outros estados das regiões Sul e Sudeste do Brasil. Portanto, levantamentos florísticos são essenciais para aumentar o conhecimento sobre a flora, principalmente em áreas sob pressão antrópica e locais com poucas coletas, como as áreas ecotonais do Maranhão. Luís Amazônica Litorânea 202 1 6 3 família (1 nove espécies. . 54,6%, 546 54,6% , 54 (54,6%) 23,4%, 234 23,4% 23 4 (23,4%) 6,2%, 62 6,2% 2 (6,2%) 4,6% 46 (4,6% 3,1%. 31 3,1% (3,1%) 7,8% 78 7 8 (7,8% vida Brasil amostragem Portanto flora coletas 20 ( 54,6 5 (54,6% 23,4 (23,4% 6,2 (6,2% 4,6 (4,6 3,1 (3,1% 7,8 (7,8 54, (54,6 23, (23,4 6, (6,2 4, (4, 3, (3,1 7, (7, (54, (23, (6, (4 (3, (7 (54 (23 (6 (3 (5 (2

Abstract We present a key to identify and an annotated list of lycophytes and ferns of the Immediate Geographical Region of São Luís, Maranhão State, which has ecotonal characteristics of Amazonian Forest, Cerrado, and Coastal Vegetation. Specimens were collected monthly between April 2020 and September 2022 in the 13 municipalities of this region. A total of 64 species were identified, including 61 species of ferns, in 18 families and 38 genera, and three species of lycophytes, in two genera and one family. The most representative families were Pteridaceae (18 species) and Polypodiaceae (nine species). The most recorded substrate of occurrence was terrestrial with 35 species (54.6%), followed by epiphytic with 15 species (23.4%), aquatic with four species (6.2%), rupicolous with three species (4.6%), and hemiepiphytic with two species (3.1%). Five species (7.8%) had more than one life form. This study expands the knowledge about the geographic distribution of fern and lycophyte species in the central region of Northern Maranhão, in Northeastern Brazil, which until now had several sampling gaps. Maranhão has a diversity that is still poorly reported and known compared to other states in South and Southeast Brazil. Therefore, floristic surveys are essential to increase what is known about the flora, especially in areas under anthropic pressure and places with few collections, such as the ecotonal areas in Maranhão. Luís State Forest Cerrado Vegetation 202 1 6 identified 3 family (1 nine species. . 54.6%, 546 54.6% , 54 (54.6%) 23.4%, 234 23.4% 23 4 (23.4%) 6.2%, 62 6.2% 2 (6.2%) 4.6%, 46 4.6% (4.6%) 3.1%. 31 3.1% (3.1%) 7.8% 78 7 8 (7.8% form Brazil gaps Therefore flora collections 20 ( 54.6 5 (54.6% 23.4 (23.4% 6.2 (6.2% 4.6 (4.6% 3.1 (3.1% 7.8 (7.8 54. (54.6 23. (23.4 6. (6.2 4. (4.6 3. (3.1 7. (7. (54. (23. (6. (4. (3. (7 (54 (23 (6 (4 (3 (5 (2

https://doi.org/10.1590/1676-0611-bn-2023-1564

14.

Influence of exposure temperature variability on concrete degradation as a function of compressive strength and ultrasonic wave propagation velocity
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Santos, Euler Wagner Freitas

; Nunes, Débora de Almeida

; Martins, Carlos Otávio Damas

; Monteiro, Michael Douglas Santos

; Santos, Cochiran Pereira dos

; Sussuchi, Eliana Midori

; Griza, Sandro

Revista IBRACON de Estruturas e Materiais

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2024, Volume 17 Nº 1 elocation e17104

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo Este estudo avaliou a influência da variabilidade da temperatura de aquecimento no nível de degradação de concretos, variando-se temperatura de exposição (200°C, 450°C e 800°C) e resistência de projeto do concreto (C25 e C40). Os concretos foram submetidos a ensaios de ultrassom (antes e depois do aquecimento), e, posteriormente, foram rompidos à compressão axial. Após a ruptura foram retiradas amostras da seção de fratura dos corpos de prova para análises microestruturais, por microscópio eletrônico de varredura (MEV), e análises moleculares, por espectroscopia Raman. Os resultados mostraram que a resistência residual dos concretos pode mudar de maneira significativa (valores divergindo em mais de 100%) com a variabilidade de temperatura no forno. Houve alterações físico-químicas dos constituintes do concreto. As variações nos espectros Raman e as alterações morfológicas (imagens em MEV) permitiram verificar a variação do nível de degradação do concreto após exposição ao fogo, em uma mesma etapa de queima, devido variação de temperatura nos fornos, sendo compatíveis com os resultados de resistência à compressão e com os de ultrassom (velocidade do pulso ultrassônico). Dessa forma, o estudo evidencia a necessidade do mapeamento adequado do calor no forno e do monitoramento da temperatura dos corpos de prova, em estudos sobre concretos sob altas temperaturas. variandose variando se 200°C, 200C C 200 (200°C 450C 450 800°C 800C 800 C25 (C2 C40. C40 . C40) antes aquecimento, , aquecimento) posteriormente axial microestruturais MEV, MEV (MEV) moleculares valores 100% 100 físicoquímicas físico químicas imagens fogo queima fornos velocidade ultrassônico. ultrassônico ultrassônico) forma temperaturas 200°C 20 45 80 C2 (C C4 (MEV 10 2 4 8 1

Abstract This study evaluated the influence of heating temperature variability on the degradation level of concrete by varying the exposure temperatures (200°C, 450°C, and 800°C) and concrete design strength (C25 and C40). The concretes were submitted to ultrasound tests (before and after heating) and then were ruptured by axial compression. After rupture, samples were taken from the fracture section of the specimens for microstructural analysis by scanning electron microscope (SEM), and molecular analysis by Raman spectroscopy. The results showed that the residual strength of the concrete can change significantly (values differing by more than 100%) with temperature variability in the oven. There were physicochemical changes in the concrete constituents. The variations in Raman spectra and morphological changes (SEM images) allowed to analyze the variation in the level of degradation of concrete after exposure to fire, at the same firing step, due to temperature variation in the ovens, being compatible with the results of compressive strength and ultrasonic wave propagation velocity (UPV). Thus, the study highlights the need for adequate mapping of the heat in the oven and monitoring of the temperature of specimens in studies of concrete at high temperatures. 200°C, 200C C 200 (200°C 450C 450 450°C 800°C 800C 800 C25 (C2 C40. C40 . C40) before compression rupture SEM, SEM , (SEM) spectroscopy values 100% 100 constituents images fire step ovens UPV. UPV (UPV) Thus 200°C 20 45 80 C2 (C C4 10 (UPV 2 4 8 1

https://doi.org/10.1590/s1983-41952024000100004

15.

Self-Electrified Water is a Powerful Toolbox for the Production of Chemicals and Energy SelfElectrified Self Electrified
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Galembeck, Fernando

; Santos, Leandra P.

; Burgo, Thiago A. L.

; Galembeck, Andre

Journal of the Brazilian Chemical Society

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2024, Volume 35 Nº 11 elocation e-20240079

Resumo: En | Texto: En | PDF: En

Three groups of unexpected experimental findings were published in the past twenty years in different research areas, opposing current paradigms, and supporting the following statements: (i) water is becoming the ideal medium for chemical synthesis; (ii) water is an electrifying agent of most materials; (iii) macroscopic matter is formed by charge mosaics that are often the outcomes of surface processes at the aqueous interfaces. These statements provoke major changes in chemical thinking that have a common feature: the behavior of chemicals in aqueous electrified interfaces may largely differ from their behavior in bulk and theoretical predictions. This review discusses eight widely accepted statements familiar to chemists, students, professors, and teachers, but challenged by many experimental findings obtained in systems having aqueous interfaces. A broader statement that is being used in this context is that the thermodynamic properties of ionic species change depending on the local electric potential, modifying their reactivity, mass transfer, and other properties. Beyond synthetic applications, atmospheric moisture is becoming a promising source of electricity. These new views create huge opportunities for chemical research and development, based on the most abundant and environmentally compatible chemical. Aqueous interfaces are thus a powerful toolbox for building a sustainable economy. areas paradigms i (i synthesis ii (ii materials iii (iii feature predictions chemists students professors teachers potential reactivity transfer applications electricity development economy

https://doi.org/10.21577/0103-5053.20240079

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