Pesquisa | SciELO

RESUMO: O presente estudo teve como objetivo avaliar se os índices obtidos com Canopeo e GreenSeeker (NDVI) em Megathyrsus maximum são capazes de estimar altura de plantas, massa de matéria seca, componentes morfológicos e teor de proteína bruta e fibra em detergente neutro em diferentes dias de crescimento. Cinco parcelas de 5 × 25 m de capim M.maximum foram definidas: sub parcelas de 1 × 1 m foram avaliadas a cada três dias, nas quais a pastagem apresenta 3, 6, 9, 12, 15, 18, 21, 24, 27 e 30 dias de rebrota. A sub parcela foi avaliada quanto à altura do dossel e acúmulo de massa. O índice do Canopeo (IC) obtido em maior altura foi menor do que o obtido em menor altura. A maior altura de medição aumentou o NDVI em relação a 0,10 m. Os maiores índices foram observados desde 18 dias de rebrota. Exceto para o IC avaliado a 0,10 m de altura, os índices não foram correlacionados com a composição química da forragem. IC e NDVI correlacionaram-se positivamente com a altura da planta, massa de MS e índice foliar, e negativamente com o índice de colmos. Assim, menores alturas de avaliação para IC e NDVI podem ser um bom preditor da altura da forragem. Valores de 0,83 e 85,8 para NDVI e IC, respectivamente, indicam um momento adequado para o início do pastejo de Megathyrsus maximum.

ABSTRACT: This study determined whether Canopeo and GreenSeeker measurements in Megathyrsus maximus can estimate plant height, dry matter mass, morphological components, and content of crude protein and neutral detergent fiber at different days of growth. Five plots of 5 × 25m M. maximus grass were defined: subplots of 1×1m were evaluated every three days, in which the pasture shows 3, 6, 9, 12, 15, 18, 21, 24, 27, and 30 days of regrowth. The subplot was evaluated for canopy height and mass accumulation. The canopeo index (CI) obtained at a higher height was lower than those obtained at a smaller height. Higher measurement height increased the normalized difference vegetation index (NDVI) relative to 0.10 m. The highest indexes were observed since 18 d of regrowth. Except for the CI evaluated at 0.10 m of height, the indexes were not correlated to the chemical composition of the forage. The CI and NDVI were positively correlated to plant height, dry matter mass, and leaf index, whereas both were negatively correlated with stalk index. Thus, lower evaluation heights for CI and NDVI can be a good predictor of forage height. Values of 0.83 and 85.8 for NDVI and CI, respectively, indicated an appropriate time to start the grazing of M. maximus.

https://doi.org/10.1590/0103-8478cr20220167

Soil properties changing and carbon losses by anthropic drainage in savanna palm swamp (vereda), central Brazil
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Santos, Gilsonley Lopes dos

; Silva Neto, Eduardo Carvalho

; Silva, Tiago Paula da

; Costa, Elias Mendes

; Beutler, Sidinei Julio

; Silva, Claudio Gomes da

; Delgado, Rafael Coll

; Horák-Terra, Ingrid

; Pereira, Marcos Gervasio

Revista Brasileira de Ciência do Solo

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2023, Volume 47 elocation e0220144

Resumo: En | Texto: En | PDF: En

ABSTRACT In the Cerrado, the palm swamps ( veredas ) are characterized by being humid and stable environments that lead to the formation of Histosols ( Organossolos ). and soils with surface horizons of organic constitution, which are fragile and sensitive to anthropic action. This study aimed to evaluate the impact of anthropization (recurrent forest fires and livestock farming) on the chemical, physical and morphological properties of soils in two palm swamps in the Environmental Preservation Area (EPA) of Pandeiros River, Minas Gerais, namely: Água Doce, in preserved condition, and Taboa, in anthropized condition. Four soil profiles were morphologically described, two profiles in each palm swamp, with subsequent chemical and physical analyses, calculations of organic carbon stock and identification of the origin of organic matter. The results were analyzed using descriptive statistics and Pearson’s correlation coefficient. Soil morphological properties were influenced by vegetation cover, drainage and anthropization conditions. As for the physical and chemical properties, adequate values were observed in the preserved palm swamp, including lower bulk density values and higher cation contents. Anthropic actions in the anthropized palm swamp caused degradation of soils, revealed by subsidence, reduction in organic carbon content, increase in bulk density and decrease in fertility. Changes promoted in the soils of the palm swamps compromise ecosystem services, indicating that actions at either local or governmental level should be stimulated for the preservation and conservation of these environments.

https://doi.org/10.36783/18069657rbcs20220144

ATR-FTIR AND UV-VIS AS TECHNIQUES FOR METHANOL ANALYSIS IN BIODIESEL-WASHING WASTEWATER
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Santos, Tiago Gomes dos

; Silva, Rúben Santana Ramos da

; Costa, Fabioney Garcia da

; Sousa, Demétrio de Abreu

Química Nova

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2023, Volume 46 Nº 7 Páginas 698 - 705

Resumo: En | Texto: En | PDF: En

Methanol present in wastewater from the biodiesel industry can become an atmospheric pollutant and an environmental liability of effluents. This article proposes the development and performance evaluation of two spectroscopic methods, ATR-FTIR and UV-Vis, to identify and quantify methanol in aqueous media. The results of both ways exhibited remarkable linear detection, with a coefficient of determination (r2) > 0.99, wide working range, and relative standard deviation (RSD) < 12%. In the ATR-FTIR method, the detection and quantification limits were 0.064 and 0.128% m V-1, respectively. The UV-Vis method presented lower limits (0.005 and 0.008% m V-1, respectively). Finally, the methods were successfully applied to quickly and sensitively quantify the methanol present in wastewater from biodiesel-washing in a wide concentration range of 0.008-0.641% m V-1. Therefore, we evidenced the feasibility of spectroscopic methods in quality control for identifying and quantifying methanol in aqueous solution, with potential for application in biodiesel production industries and research laboratories. Mainly by ATR-FTIR, in the region of 1300-900 cm-1, as it proved to be more environmentally friendly, faster, and cheaper than the GC-FID method.

https://doi.org/10.21577/0100-4042.20230041

Soil attributes and spatial variability of soil organic carbon stock under the Atlantic Forest, Brazil
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Delarmelina, William Macedo

; Caldeira, Marcos Vinicius Winckler

; Gomes Junior, Diêgo

; Godinho, Tiago de Oliveira

; Caliman, Jônio Pizzol

; Gonçalves, Elzimar de Oliveira

; Kunz, Sustanis Horn

; Pereira, Marcos Gervasio

; Silva, Camila Santos da

Ciência Florestal

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Set 2022, Volume 32 Nº 3 Páginas 1528 - 1551

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

Resumo Para explorar os atributos físicos e químicos do solo e espacializar o estoque de carbono orgânico do solo em um trecho de Floresta Atlântica (Estacional Semidecidual Submontanal, Espírito Santo, Brasil), este estudo avaliou quatro camadas de solo (0-5, 5-10, 10-20 e 20-40 cm), as inter-relações dos atributos físicos e químicos e a espacialização do estoque de carbono orgânico do solo aplicando a interpolação por “cokrigagem”. Foram coletadas 12 amostras em cada camada de solo, sendo determinados os teores de nutrientes, a densidade do solo, a textura e o teor de carbono orgânico, sendo também determinado o estoque de carbono. Os atributos do solo mais significativos na variação dos dados foram verificados pela ordenação por Análise de Componentes Principais (ACP) agrupando as parcelas semelhantes quanto às características físicas e químicas. Com base na autocorrelação espacial dos atributos do solo, os dados do modelo de elevação digital (altitude e declividade) para o local estudado foram combinados para explorar a relação de coordenadas entre os parâmetros do terreno e o estoque de carbono orgânico do solo. Foi verificado o aumento da fertilidade do solo paralelo ao aumento do teor de matéria orgânica, auxiliando no entendimento das diferenças e similaridades dos sítios identificados no campo. Observa-se diferença espacial no estoque de carbono orgânico do solo, sendo o maior verificado nas áreas de menor declividade e altitude.

Abstract This study aimed to explore the physical and chemical attributes of the soil and to spatialize the soil organic carbon stock in a stretch of Atlantic Forest by evaluating four soil layers and the interrelationships of physical and chemical attributes as well as the spatialization of soil organic carbon stock by applying cokriging interpolation. Thus, 12 soil samples were collected in a soil layer, and the nutrient content, soil density, texture, soil organic carbon content and the soil carbon stock were determined. A Principal Component Analysis (PCA) grouped the most similar plots in terms of physical and chemical characteristics. Based on the spatial autocorrelation of the soil attributes, the digital elevation model data (altitude and slope) for the studied site were combined to explore the coordinate relationship between the terrain parameters and the soil organic carbon stock. We verified an increase in the soil fertility parallel to the increase in the organic matter content in the soil, helping to understand the differences and similarities of the identified sites in the field. There is a spatial difference in the soil organic carbon stock, with the largest being observed in areas of lower slope and altitude. The physical and chemical attributes of the soil in the Atlantic Forest varied according to the sampled points, being strongly related to the relief. The spatial variability altered soil organic carbon stocks in the forest under study.

https://doi.org/10.5902/1980509867028

Atividades corporais de aventura na escola: a corrida de orientação como proposta no desenvolvimento das competências socioemocionais
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Ramos Dantas, Tiago

; Vieira-Souza, Lucio Marques

; Triani, Felipe

; Getirana-Mota, Márcio

; Lopes dos Santos, Jymmys

; Aidar, Felipe J.

; Gomes Ribeiro da Costa, Lúcio Flávio

Educación Física y Ciencia

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Abr 2022, Volume 24 Nº 2 Páginas 216 - 216

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

Abstract Adventure sports when thematized in Physical Education classes have the potential to arouse strong emotions, mainly through risk and adventure experiences, in the school context, the National Common Curricular Base-BNCC, there is a need to work on emotional education. The objective of this study was to analyze the socio-emotional behavior of students in the face of an orienteering race intervention. 39 high school students participated in the study. The Big Five Inventory (BFI) questionnaire was applied after an orienteering race intervention to assess the socio-emotional profile. It was found that the highest averages among the profiles were: Openness (34.59), kindness (30.44), conscientiousness (28.23) (Table 1). The orienteering race proves to be effective in the emotional performance of the students because the profiles of the highest the highest averages were for the profiles of: Openness, kindness and conscientiousness. This intervention also meets the requirements present in the BNCC on emotional development as well as on the need for adventure practices for Physical Education.

Resumo Os esportes de aventura quando tematizados nas aulas de Educação Física têm o potencial de despertar fortes emoções, principalmente pelas experiências de risco e aventura, no contexto escolar, a Base Nacional Comum Curricular-BNCC, existe há necessidade de se trabalhar a educação emocional. O objetivo deste estudo foi analisar o comportamento socioemocional dos alunos diante de uma intervenção de corrida de orientação. 39 escolares do ensino médio participaram do estudo. Foi aplicado o questionário Big Five Inventory (BFI) após uma intervenção de corrida de orientação para a avaliação do perfil socioemocional. Foi constado que as maiores médias entre os perfis foram: Abertura (34,59), amabilidade (30,44), conscienciosidade (28,23) (tabela 1). A corrida de orientação, se mostra eficaz no desempenho emocional dos escolares pois os perfis de maior as maiores medias foram para os perfis de: Abertura, amabilidade e conscienciosidade. Está intervenção também atende aos requisitos presentes no BNCC sobre o desenvolvimento emocional como também sobre a necessidade de práticas de aventura para a Educação Física.

https://doi.org/10.24215/23142561e216

Performance of lambs fed total feed silage based on cactus pear
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Silva, Juscelino Kubitschek Bevenuto da

; Araújo, Gherman Garcia Leal de

; Santos, Edson Mauro

; Oliveira, Juliana Silva de

; Campos, Fleming Sena

; Gois, Glayciane Costa

; Silva, Tiago Santos

; Matias, Alex Gomes da Silva

; Ribeiro, Ossival Lolato

; Perazzo, Alexandre Fernandes

; Zanine, Anderson de Moura

Revista mexicana de ciencias pecuarias

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Mar 2022, Volume 13 Nº 1 Páginas 19 - 31

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

Resumen: Este estudio tuvo como objetivo evaluar la ingesta, digestibilidad aparente, balance hídrico, balance de nitrógeno y rendimiento productivo en corderos alimentados con ensilaje de nopal asociado con forrajes tropicales. En el experimento se utilizaron 40 corderos machos cruzados intactos, con un peso corporal inicial de 18.85 ± 1.2 kg. El diseño experimental fue completamente al azar, con 5 tratamientos y 8 repeticiones. Los tratamientos consistieron en dietas con diferentes proporciones de pasto buffel y salvado de trigo como fuentes de fibra detergente neutro (FDN), en ensilaje de alimento total (EAT) a base de nopal: EAT1 - 279 g/kg de pasto buffel; EAT2 - 240 g/kg de pasto buffel y 17 g/kg de salvado de trigo; EAT3 - 198 g/kg de pasto buffel y 34 g/kg de salvado de trigo; EAT4 - 108 g/kg de pasto buffel y 74 g/kg de salvado de trigo; EAT5 - 118 g/kg de salvado de trigo. La ingesta más baja de FDN se encontró en corderos que consumieron EAT5 (402 g/día). La digestibilidad aparente de los carbohidratos no fibrosos fue mayor para EAT5, mientras que la digestibilidad aparente de FDN de EAT5 y EAT4 fue mayor que la de EAT1. Las dietas promovieron una ganancia diaria de peso promedio de 180.8 g/día. En condiciones experimentales, el uso de nopal forrajero y concentrado en forma de raciones mixtas totales de ensilaje conduce a una mayor ingesta de proteína cruda, carbohidratos no fibrosos, extracto etéreo y mayor digestibilidad de carbohidratos no fibrosos y fibra detergente neutro, sin embargo, todas las dietas fueron viables en la alimentación de ovinos confinados, proporcionando ganancias de hasta 198 g/d según la formulación de la dieta.

Abstract This study aimed was to evaluate the intake, apparent digestibility, water balance, nitrogen balance, and productive performance in lamb fed cactus pear silage associated with tropical forages. Forty male intact crossbred lambs, with an initial body weight of 18.85 ± 1.2 kg, were used in the experiment. The experimental design was completely randomized, with 5 treatments and 8 replications. The treatments consisted of diets with different proportions of buffelgrass and wheat bran as sources of neutral detergent fiber (NDF), in total feed silage (TFS) based on cactus pear: TFS1 - 279 g/kg of buffelgrass; TFS2 - 240 g/kg of buffelgrass and 17 g/kg of wheat bran; TFS3 - 198 g/kg of buffelgrass and 34 g/kg of wheat bran; TFS4 - 108 g/kg of buffelgrass and 74 g/kg of wheat bran; TFS5 - 118 g/kg of wheat bran. The lowest NDF intake was found in lambs that consumed TFS5 (402 g/d). The non-fibrous carbohydrates apparent digestibility was higher for TFS5, while the NDF apparent digestibility of TFS5 and TFS4 was higher than TFS1. Diets promoted an average daily weight gain of 180.8 g/d. Under experimental conditions, the use of forage cactus pear and concentrate in the form of total mixed rations silage leads to greater intake of crude protein, non-fibrous carbohydrates, ether extract and greater digestibility of non-fibrous carbohydrates and neutral detergent fiber, however, all diets were viable in the feed of confined sheep, providing gains of up to 198 g/d according with the formulation of the diet.

https://doi.org/10.22319/rmcp.v13i1.5849 30 downloads

Physicochemical and sensorial characterization of yacon mixed juice with bioactive properties
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Suárez, Daniel Felipe Toro

; Lima, Luciana Leite de Andrade

; Stamford, Thayza Christina Montenegro

; Silva, Dayanne Consuelo da

; Santos, Tiago Gomes

; Lima, Gerlane Souza de

; Padilha, Vivianne Montarroyos

; Stamford, Tânia Lúcia Montenegro

Ciência Rural

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2022, Volume 52 Nº 6 elocation e20210140

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

RESUMO: Este estudo objetivou desenvolver suco misto funcional, palatável e aceitável de abacaxi (Ananas comosus var. Comosus), maracujá (Passiflora edulis flavicarpa degenerer) e yacon (Smallanthus sonchifolius), enriquecido com compostos bioativos e prebióticos. A proporção ideal entre as frutas e o yacon foi resultado de planejamento de mistura com seis formulações e avaliação de perfil de compostos bioativos e ácidos orgânicos. A melhor formulação foi avaliada sensorialmente pelo teste Just About Right (JAR) e por aceitação global. O suco misto escolhido (M6 - 30% de abacaxi, 45% de maracujá e 30% de yacon) apresentou altos valores para atividade antioxidante (82,5% de inibição de DPPH *), carotenoides (0,97 mg/100g) polifenóis totais (70,28 mg/100g). Também foram detectados flavonóis totais (23,95 mg/100g), antocianinas totais (1,37 mg/100g), ácido gálico (3,13 μg/mL), quercetina (2,25 μg/mL), ácido siríngico (1,01 μg/mL), ácido cítrico (949,30 mg/100g), ácido málico (140,35 mg/100g) e 0,58% de fibra alimentar. Sensorialmente, os consumidores perceberam alta acidez, sabor forte e textura fibrosa, o que pode ter afetado a aceitação global (6,0). Os resultados indicam a possibilidade de obtenção de um suco misto funcional e palatável com yacon.

ABSTRACT: This study developed a palatable, acceptable, and functional mixed juice of pineapple (Ananas comosus var. Comosus), passion fruit (Passiflora edulis flavicarpa degener), and yacon (Smallanthus sonchifolius), with enhanced bioactive and prebiotic compounds. The ideal proportion of fruit and yacon was derived after planning a mixture with six formulations and by evaluating their bioactive compounds and organic acid profile. The best formulation sensory evaluation was performed by the Just-About-Right test (JAR) and global acceptance. The chosen mixed juice (M6 - 30% pineapple, 45% passion fruit, and 30% yacon) presented results that showed elevated levels of antioxidant activity (82.5% DPPH* inhibition), carotenoids (0.97 mg.100g-1), and total polyphenols (70.28 mg.100g-1). Total flavonols (23.95 mg.100g-1), total anthocyanins (1.37 mg.100g-1), gallic acid (3.13 μg.mL-1), quercetin (2.25 μg.mL-1), syringic acid (1.01 μg.mL-1), citric acid (949.30 mg.100g-1), malic acid (140.35 mg.100g-1), and 0.58% of dietary fiber were also reported. Sensorially, consumers perceived high acidity, strong flavor, and a fibrous texture, which might have affected the global acceptance of the juice (6.0). Results indicated the feasibility of obtaining a functional and palatable mixed juice using yacon.

https://doi.org/10.1590/0103-8478cr20210140

Feeding activity of soil fauna in production systems under cover crop straws
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Fialho, Arlini Rodrigues

; Santos, Darliane de Castro

; Niva, Cintia Carla

; Ferreira, Jaqueline Balbina Gomes

; Paim, Tiago do Prado

Pesquisa Agropecuária Tropical

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2022, Volume 52 elocation e70416

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

RESUMO Conservar o nível desejável de qualidade do solo, especialmente prezando sua saúde e sustentabilidade, não é tarefa simples, devido aos inúmeros fatores que o influenciam. Objetivou-se mensurar a atividade alimentar da fauna do solo em sistemas de produção sob palhadas de plantas de cobertura amostradas à profundidade de 0-8,0 cm. Foi adotado delineamento em blocos casualizados, com quatro repetições e oito tratamentos, que corresponderam ao cultivo de soja sob palhadas de plantas de cobertura: monocultivo de milho; milho consorciado com Urochloa ruziziensis; monocultivo de U. ruziziensis; sorgo consorciado com U. ruziziensis; monocultivo de sorgo; girassol consorciado com U. ruziziensis; mix (milheto + Crotalaria spectabilis + U. ruziziensis) e pousio. À profundidade de 1,0 cm, houve variação de 63,59-37,06 % no consumo entre os tratamentos, com maior consumo para o mix, em comparação ao pousio. À profundidade de 2,0-7,0 cm, o consumo não variou entre os tratamentos. Para a profundidade de 8,0 cm, o pousio apresentou o maior consumo (45,76 %; p < 0,05), em comparação ao girassol consorciado com U. ruziziensis (20,51 %), sorgo (20,58 %) e sorgo consorciado com U. ruziziensis (18,96 %).

ABSTRACT To preserve a desirable level of soil quality, especially taking into consideration its health and sustainability, is not an easy task, due to the numerous factors that influence it. This study aimed to measure the feeding activity of soil fauna in production systems under cover crop straws sampled at the depth of 0-8.0 cm. A randomized blocks design, with four replicates and eight treatments, was used, corresponding to soybean cultivation under the following cover crop straws: maize monoculture; maize intercropped with Urochloa ruziziensis; U. ruziziensis monoculture; sorghum intercropped with U. ruziziensis; sorghum monoculture; sunflower intercropped with U. ruziziensis; mix (millet + Crotalaria spectabilis + U. ruziziensis); and a fallow treatment. At the depth of 1.0 cm, there was a variation of 63.59-37.06 % for consumption among the treatments, with the highest consumption for the mix, if compared to the fallow treatment. At the depth of 2.0-7.0 cm, the consumption did not vary among the treatments. For the depth of 8.0 cm, the fallow treatment presented the highest consumption (45.76 %; p < 0.05), when compared to sunflower intercropped with U. ruziziensis (20.51 %), sorghum (20.58 %) and sorghum intercropped with U. ruziziensis (18.96 %).

https://doi.org/10.1590/1983-40632022v5270416

Caracterização do bagaço de cana-de-açúcar e suas potencialidades para geração de energia e polpa celulósica
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Vivian, Magnos Alan

; Santos, Juliana Rodrigues Siviero dos

; Segura, Tiago Edson Simkunas

; Silva Júnior, Francides Gomes da

; Brito, José Otávio

Madera y bosques

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2022, Volume 28 Nº 1 elocation e2812376

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

Abstract Brazil is the world's largest producer of sugarcane, from which sugar and ethanol are obtained. However, after the production process, waste remains, among which stands out the bagasse, which generates millions of tons annually. The bagasse can be used for many purposes; however, it is important to know its properties in order to make the best use of it. Thus, the present study aimed to evaluate the bagasse's physical, chemical, and anatomical properties, as well as its potential for energy generation and pulp production. The evaluations of the characteristics and potential of bagasse followed the recommendations and standards of the Brazilian Association of Technical Standards [ABNT], the Technical Association of the Pulp & Paper Industry Inc. [TAPPI], and the International Association of Wood Anatomists [IAWA]. Based on the results, a low density (0.048 g/cm3) was observed; high ash (5.8%) and extractives (5.7%) content, and low lignin content (24.5%); and fibers with moderately long length (1.60 mm), the other dimensions being compatible with eucalyptus wood; and regular anatomical quality indicators for paper production. The bagasse has a good energetic potential in nature, and the heat treatment provides a significant gain in this regard. In addition, the bagasse also has good potential for pulp production, with yields similar to those reported for eucalyptus wood, but with a higher reject content, and less viscosity and hexenuronic acids content. In general, sugarcane bagasse has interesting properties and can be better used, either for energy generation or pulp production.

Resumo O Brasil é o maior produtor mundial de cana, a partir da qual se obtém o açúcar e o etanol. Porém após o processo produtivo sobram resíduos, entre os quais se destaca o bagaço, que gera milhões de toneladas anualmente. O bagaço pode ser utilizado para várias finalidades, no entanto é importante conhecer suas propriedades e aptidões para realizar o melhor aproveitamento possível. Desta forma, o presente estudo teve como objetivo avaliar as propriedades físicas, químicas e anatômicas do bagaço, bem como seu potencial para geração de energia e produção de polpa celulósica. As avaliações das características e potencialidades do bagaço seguiram as recomendações e normas da Associação Brasileira de Normas Técnicas [ABNT], Technical Association of Pulp and Paper Industry [TAPPI] e International Association of Wood Anatomists [IAWA]. Com base nos resultados observou-se baixa densidade aparente (0,048 g/cm3); alto teor de cinzas (5,8%) e extrativos (5,7%), e baixo teor de lignina (24,5%); fibras com comprimento moderadamente longo (1,60 mm), sendo as demais dimensões compatíveis com a madeira de eucalipto; e indicadores anatômicos de qualidade regulares para produção de papel. O bagaço apresenta bom potencial energético in natura, e o tratamento térmico proporciona um ganho significativo neste quesito. Além disso, o bagaço também apresenta bom potencial para produção de polpa celulósica, com rendimentos similares aos relatados para a madeira de eucalipto, porém com maior teor de rejeitos, e menor viscosidade e teor de ácidos hexenurônicos. De forma geral, o bagaço de cana-de-açúcar tem propriedades interessantes e pode ser melhor aproveitado, seja para geração de energia ou produção de polpa celulósica.

https://doi.org/10.21829/myb.2022.2812376 8 downloads

10.

Posicionamento Brasileiro sobre o Uso da Multimodalidade de Imagens na Cardio-Oncologia – 2021
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Melo, Marcelo Dantas Tavares de

; Paiva, Marcelo Goulart

; Santos, Maria Verônica Câmara

; Rochitte, Carlos Eduardo

; Moreira, Valéria de Melo

; Saleh, Mohamed Hassan

; Brandão, Simone Cristina Soares

; Gallafrio, Claudia Cosentino

; Goldwasser, Daniel

; Gripp, Eliza de Almeida

; Piveta, Rafael Bonafim

; Silva, Tonnison Oliveira

; Santo, Thais Harada Campos Espirito

; Ferreira, Waldinai Pereira

; Salemi, Vera Maria Cury

; Cauduro, Sanderson A.

; Barberato, Silvio Henrique

; Lopes, Heloísa M. Christovam

; Pena, José Luiz Barros

; Rached, Heron Rhydan Saad

; Miglioranza, Marcelo Haertel

; Pinheiro, Aurélio Carvalho

; Vrandecic, Bárbara Athayde Linhares Martins

; Cruz, Cecilia Beatriz Bittencourt Viana

; Nomura, César Higa

; Cerbino, Fernanda Mello Erthal

; Costa, Isabela Bispo Santos da Silva

; Coelho Filho, Otavio Rizzi

; Carneiro, Adriano Camargo de Castro

; Burgos, Ursula Maria Moreira Costa

; Fernandes, Juliano Lara

; Uellendahl, Marly

; Calado, Eveline Barros

; Senra, Tiago

; Assunção, Bruna Leal

; Freire, Claudia Maria Vilas

; Martins, Cristiane Nunes

; Sawamura, Karen Saori Shiraishi

; Brito, Márcio Miranda

; Jardim, Maria Fernanda Silva

; Bernardes, Renata Junqueira Moll

; Diógenes, Tereza Cristina

; Vieira, Lucas de Oliveira

; Mesquita, Claudio Tinoco

; Lopes, Rafael Willain

; Segundo Neto, Elry Medeiros Vieira

; Rigo, Letícia

; Marin, Valeska Leite Siqueira

; Santos, Marcelo José

; Grossman, Gabriel Blacher

; Quagliato, Priscila Cestari

; Alcantara, Monica Luiza de

; Teodoro, José Aldo Ribeiro

; Albricker, Ana Cristina Lopes

; Barros, Fanilda Souto

; Amaral, Salomon Israel do

; Porto, Carmen Lúcia Lascasas

; Barros, Marcio Vinícius Lins

; Santos, Simone Nascimento dos

; Cantisano, Armando Luís

; Petisco, Ana Cláudia Gomes Pereira

; Barbosa, José Eduardo Martins

; Veloso, Orlando Carlos Glória

; Spina, Salvador

; Pignatelli, Ricardo

; Hajjar, Ludhmilla Abrahão

; Kalil Filho, Roberto

; Lopes, Marcelo Antônio Cartaxo Queiroga

; Vieira, Marcelo Luiz Campos

; Almeida, André Luiz Cerqueira

Arquivos Brasileiros de Cardiologia

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Out 2021, Volume 117 Nº 4 Páginas 845 - 909

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

https://doi.org/10.36660/abc.20200266 103 downloads

11.

Genetic parameters estimation in common bean under weed plant competition
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Coelho, Clever Geraldo

; Dalvi, Leandro Pin

; Marçal, Tiago de Souza

; Oliveira, Lidiane dos Santos Gomes

; Oliveira, Fabio Luiz

; Fialho, Gustavo Sessa

Revista Ceres

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Ago 2021, Volume 68 Nº 4 Páginas 333 - 342

Resumo: En | Texto: En | PDF: En

ABSTRACT The present study aimed to estimate genetic parameters of 20 common bean genotypes, commercial and regional bean on weed interference. The agronomic characters analyzed were: average stem diameter (ASD); average plant length (APL); number of pods per pot (NPP); number of locules per pod (NLP); number of grains per pod (NGP); percentage of empty locules (% EL); total grains per pot (TGP); total grain weight per pot (TGW) and average grain weight (AGW). High heritability values were found for most of the characters studied, except for NGP and EL; in addition to great genetic variability among genotypes. Therefore, for most of the characteristics of agronomic interest studied, simple selection methods can be applied with great potential to identify superior genotypes and consequent genetic progress in common bean breeding.

https://doi.org/10.1590/0034-737x202168040011 5 downloads

12.

Implementing healthcare professionals’ training during COVID-19: a pre and post-test design for simulation training
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Santos, Thiago Martins

; Pedrosa, Rafaela Batista dos Santos

; Carvalho, Danielle Rachel dos Santos

; Franco, Mário Henrique

; Silva, Juliany Lino Gomes

; Franci, Daniel

; de Jorge, Bruno

; Munhoz, Daniel

; Calderan, Thiago

; Grangeia, Tiago de Araujo Guerra

; Cecilio-Fernandes, Dario

Sao Paulo Medical Journal

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Mai 2021, Volume 139 Nº 5 Páginas 514 - 519

Resumo: En | Texto: En | PDF: En

ABSTRACT BACKGROUND: Coronavirus disease-19 (COVID-19) has imposed a new reality that presents several challenges for healthcare professionals. The main challenge has been the lack of proper training in relation to an unknown disease. OBJECTIVE: To investigate healthcare professionals’ acquisition of knowledge of a new airway management protocol for COVID-19 through their participation in simulation training. DESIGN AND SETTING: Pre and post-test study with purpose sampling, carried out in a tertiary-level hospital in the city of Campinas, state of São Paulo, Brazil. METHODS: This was a cross-sectional pre and post-test intervention among healthcare professionals working in the intensive care unit and emergency department of a large hospital. The training was carried out using an in situ simulation scenario and the participants answered pre and post-tests consisting of a 20-item questionnaire about the new protocol. RESULTS: The paired-sample t test demonstrated that there was a significant increase in test score (t = −19.06; P < 0.001), from before the training (M = 8.62; standard deviation, SD = 3.53) to after the simulation training (M = 17.02; SD = 1.76). CONCLUSIONS: The simulated training had a positive impact on the healthcare professionals’ acquisition of the COVID-19 protocol. We also demonstrated that in situ simulation training was an efficient tool for implementing new protocols, thus bringing benefits to healthcare systems, professionals and patients.

https://doi.org/10.1590/1516-3180.2021.0190.r1.27052021 8 downloads

13.

The Program for Biodiversity Research in Brazil: The role of regional networks for biodiversity knowledge, dissemination, and conservation
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ROSA, CLARISSA

; BACCARO, FABRICIO

; CRONEMBERGER, CECILIA

; HIPÓLITO, JULIANA

; BARROS, CLAUDIA FRANCA

; RODRIGUES, DOMINGOS DE JESUS

; NECKEL-OLIVEIRA, SELVINO

; OVERBECK, GERHARD E.

; DRECHSLER-SANTOS, ELISANDRO RICARDO

; ANJOS, MARCELO RODRIGUES DOS

; FERREGUETTI, ÁTILLA C.

; AKAMA, ALBERTO

; MARTINS, MARLÚCIA BONIFÁCIO

; TOMAS, WALFRIDO MORAES

; SANTOS, SANDRA APARECIDA

; FERREIRA, VANDA LÚCIA

; CUNHA, CATIA NUNES DA

; PENHA, JERRY

; PINHO, JOÃO BATISTA DE

; SALIS, SUZANA MARIA

; DORIA, CAROLINA RODRIGUES DA COSTA

; PILLAR, VALÉRIO D.

; PODGAISKI, LUCIANA R.

; MENIN, MARCELO

; BÍGIO, NARCÍSIO COSTA

; ARAGÓN, SUSAN

; MANZATTO, ANGELO GILBERTO

; VÉLEZ-MARTIN, EDUARDO

; SILVA, ANA CAROLINA BORGES LINS E

; IZZO, THIAGO JUNQUEIRA

; MORTATI, AMANDA FREDERICO

; GIACOMIN, LEANDRO LACERDA

; ALMEIDA, THAÍS ELIAS

; ANDRÉ, THIAGO

; SILVEIRA, MARIA AUREA PINHEIRO DE ALMEIDA

; SILVEIRA, ANTÔNIO LAFFAYETE PIRES DA

; MESSIAS, MARILUCE REZENDE

; MARQUES, MARCIA C.M.

; PADIAL, ANDRE ANDRIAN

; MARQUES, RENATO

; BITAR, YOUSZEF O.C.

; SILVEIRA, MARCOS

; MORATO, ELDER FERREIRA

; PAGOTTO, RUBIANI DE CÁSSIA

; STRUSSMANN, CHRISTINE

; MACHADO, RICARDO BOMFIM

; AGUIAR, LUDMILLA MOURA DE SOUZA

; FERNANDES, GERALDO WILSON

; OKI, YUMI

; NOVAIS, SAMUEL

; FERREIRA, GUILHERME BRAGA

; BARBOSA, FLÁVIA RODRIGUES

; OCHOA, ANA C.

; MANGIONE, ANTONIO M.

; GATICA, AILIN

; CARRIZO, MARÍA CELINA

; RETTA, LUCÍA MARTINEZ

; JOFRÉ, LAURA E.

; CASTILLO, LUCIANA L.

; NEME, ANDREA M.

; RUEDA, CARLA

; TOLEDO, JOSÉ JULIO DE

; GRELLE, CARLOS EDUARDO VIVEIROS

; VALE, MARIANA M.

; VIEIRA, MARCUS VINICIUS

; CERQUEIRA, RUI

; HIGASHIKAWA, EMÍLIO MANABU

; MENDONÇA, FERNANDO PEREIRA DE

; GUERREIRO, QUÊZIA LEANDRO DE MOURA

; BANHOS, AUREO

; HERO, JEAN-MARC

; KOBLITZ, RODRIGO

; COLLEVATTI, ROSANE GARCIA

; SILVEIRA, LUÍS FÁBIO

; VASCONCELOS, HERALDO L.

; VIEIRA, CECÍLIA RODRIGUES

; COLLI, GUARINO RINALDI

; CECHIN, SONIA ZANINI

; SANTOS, TIAGO GOMES DOS

; FONTANA, CARLA S.

; JARENKOW, JOÃO A.

; MALABARBA, LUIZ R.

; RUEDA, MARTA P.

; ARAUJO, PUBLIO A.

; PALOMO, LUCAS

; ITURRE, MARTA C.

; BERGALLO, HELENA GODOY

; MAGNUSSON, WILLIAM E.

Anais da Academia Brasileira de Ciências

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2021, Volume 93 Nº 2 elocation e20201604

Resumo: En | Texto: En | PDF: En

Abstract The Program for Biodiversity Research (PPBio) is an innovative program designed to integrate all biodiversity research stakeholders. Operating since 2004, it has installed long-term ecological research sites throughout Brazil and its logic has been applied in some other southern-hemisphere countries. The program supports all aspects of research necessary to understand biodiversity and the processes that affect it. There are presently 161 sampling sites (see some of them at Supplementary Appendix), most of which use a standardized methodology that allows comparisons across biomes and through time. To date, there are about 1200 publications associated with PPBio that cover topics ranging from natural history to genetics and species distributions. Most of the field data and metadata are available through PPBio web sites or DataONE. Metadata is available for researchers that intend to explore the different faces of Brazilian biodiversity spatio-temporal variation, as well as for managers intending to improve conservation strategies. The Program also fostered, directly and indirectly, local technical capacity building, and supported the training of hundreds of undergraduate and graduate students. The main challenge is maintaining the long-term funding necessary to understand biodiversity patterns and processes under pressure from global environmental changes.

https://doi.org/10.1590/0001-3765202120201604 1034 downloads

14.

Grating Lobes Suppression in Frequency Selective Surfaces Using Electromagnetic Band Gap with Square Holes
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Bezerra, Tiago dos Santos

; Campos, Antonio Luiz Pereira de Siqueira

; Lira, Ruann Victor de Andrade

; Gomes Neto, Alfredo

Journal of Microwaves, Optoelectronics and Electromagnetic Applications

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Dez 2020, Volume 19 Nº 4 Páginas 510 - 521

Resumo: En | Texto: En | PDF: En

Abstract In this paper, the authors present a proposal for an application of electromagnetic bandgap (EBG), for suppression of grating lobes, in frequency selective surfaces (FSS), not yet studied in the literature. An alternative type of EBG with square holes was proposed to reduce the computational effort in simulations. The study consists of an application of a rectangular periodic array of cylindrical and square holes in FSS dielectric substrate to create rejection bands and suppress specific resonant frequency modes. We built four prototypes and compared measured results with simulated results obtained with ANSYS HFSS. Simulations and measurements show suppression levels up to 6 dB. A good agreement between the results is observed. The FSS with EBG with square holes allows a simulation time 70 % lower than FSS with EBG with cylindrical holes.

https://doi.org/10.1590/2179-10742020v19i4860 450 downloads

15.

Rheological characteristics PBAT/organoclay compounds
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Santos, Tiago Tibério dos

; Almeida, Tatiara Gomes

; Pereira, Camila Ariana Becker

; Agrawal, Pankaj

; Canedo, Eduardo Luis

; Carvalho, Laura Hecker de

REM - International Engineering Journal

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Jun 2019, Volume 72 Nº 2 Páginas 243 - 250

Resumo: En | Texto: En | PDF: En

Abstract The rheological behavior of poly (butylene adipate-co-terephthalate) (PBAT) and its composites prepared with three different organoclays was investigated. Composites containing up to 7.5%, w/w organoclay, were prepared by two routes: (a) direct melt blending in an internal laboratory mixer with high intensity rotors and (b) concentrates (prepared in the internal mixer) with 50 %, by weight, of the organoclays diluted in a co-rotating twin screw extruder equipped with a high intensity mixing thread operating at a nominal speed of 480 rpm. The samples were characterized by both torque and parallel plate rheometry. Results indicate that nanodispersions in the clay layers were obtained during processing and that, like the pure matrix, at high shear rates, the organoclay compounds follow the power law, although with higher viscosity. It is believed that the interaction of the polymer with the organoclay is responsible for the increase in melt viscosity (observed by increases in torque and relaxation time) of the hybrid systems.

https://doi.org/10.1590/0370-44672018720077 895 downloads

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