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Application rate and nozzles associated with droplet electrification affect the spraying quality in common bean
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Mello, Carlos E. L.

; Carmo, Eduardo L. do

; Braz, Guilherme B. P.

; Procópio, Sérgio de O.

; Simon, Gustavo A.

; Souza, Matheus de F.

; Araújo, Gabriel E. S. de

; Lins, Hamurábi A.

Revista Brasileira de Engenharia Agrícola e Ambiental

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Fev 2024, Volume 28 Nº 2 elocation e273814

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

ABSTRACT The objective of this work was to evaluate the application efficiency of different nozzle tips associated with increasing application rates. A field experiment was conducted in a factorial 3 × 4 randomized block design with four replicates. The first factor consisted of three types of nozzle tips (simple flat fan, hollow cone, and hollow cone with the electrification of the drops), and the second factor constituted the four application rates (50, 100, 200, and 250 L ha-1). Electrostatic technology and a hollow cone tip increased the deposited volume on leaves on the upper and medium strata of the common bean plant, regardless of the application rate used. The increase in the application rate increased the volume of spray solution captured in the upper, medium, and lower strata, the drop density, the volumetric median diameter (VMD), and the percentage of foliar coverage, regardless of the spray tip evaluated. The percentage of leaf coverage on the adaxial and abaxial leaf was not influenced by the simple fan or hollow cone spray tips, with or without the association of electrostatic technology.

RESUMO O objetivo deste trabalho foi avaliar a eficiência de aplicação de diferentes pontas de bicos associada a taxas crescentes de aplicação. Foi conduzido um experimento de campo no delineamento em blocos ao acaso, em esquema fatorial 3 x 4, com quatro repetições. O primeiro fator consistiu em três tipos de bicos: leque plano simples, cone oco e cone oco com eletrificação das gotas; e o segundo fator por quatro taxas de aplicação (50, 100, 200 e 250 L ha-1). A tecnologia eletrostática e o cone oco aumentaram o volume depositado nas folhas dos estratos superior e médio do feijoeiro, independentemente da dose de aplicação utilizada. O aumento da taxa de aplicação aumentou o volume de calda captado nos estratos superior, médio e inferior do feijoeiro, a densidade de gotas, o diâmetro médio volumétrico (DMV) e a porcentagem de cobertura foliar, independente da ponta de pulverização avaliada. A porcentagem de cobertura foliar na face adaxial e abaxial não foi influenciada pelas pontas de pulverização em leque simples e cone oco com ou sem a associação da tecnologia eletrostática.

https://doi.org/10.1590/1807-1929/agriambi.v28n2e273814

Reusing Surlyn® Ionomer Scraps in LDPE Blends: Mechanical and Thermal Properties
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Barbosa, Matheus F.

; Souza, Adriana M. Catelli de

Materials Research

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2023, Volume 26 Supl. 1 elocation e20230019

Resumo: En | Texto: En | PDF: En

This study aimed to evaluate the possibility of reusing industrial scraps of Surlyn® ionomer by obtaining blends with Low-Density Polyethylene (LDPE). Blends of LDPE and Surlyn® scraps were obtained by extrusion with compositions ranging from 25 to 75 wt% of the ionomer. Their melt flow index (MFI), morphology (SEM), mechanical (tensile, flexural, impact tests) and thermal properties (DSC, TGA, HDT tests) were analyzed. The morphology of the blends presented two phases, indicating the immiscibility of phases. Surlyn® incorporation promoted a decrease in the degree of crystallinity of LDPE and a slight increase in the thermal decomposition temperature. In addition, Surlyn® decreased the decomposition rate of LDPE. However, the decrease in the degree of crystallinity did not affect the mechanical properties of the blends. Incorporating ionomer in LDPE promoted an increase in tensile and flexural strength, tensile and flexural modulus and strain at break. Impact strength decreased with increasing ionomer concentration.

https://doi.org/10.1590/1980-5373-mr-2023-0019

Photocatalytic Degradation of the Rhodamine B Dye Under Visible Light Using NixCu(1-x)Fe2O4 Synthesized by EDTA-Citrate Complexation Method
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Azevedo, Ila G. D. D. de

; Rodrigues, Matheus V.

; Gomes, Yara F.

; Araújo, Camila P. B. de

; Souza, Carlson P. de

; Moriyama, André L. L.

Materials Research

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2023, Volume 26 Supl. 1 elocation e20230061

Resumo: En | Texto: En | PDF: En

The NixCu(1-x)Fe2O4 (x = 0, 0.2, 0.8, 1) mixed nickel and copper ferrites were synthesized using the EDTA-Citrate complexation method and calcined at 700°C. The structure, properties and characterization of the samples were analyzed by DRX, Rietveld refinement, SEM, and DRE UV-Vis, indicating the phase formation of tetragonal (CuFe2O4 and Ni0.2Cu0.8Fe2O4) and cubic (Ni0.8Cu0.2Fe2O4 and NiFe2O4). The materials exhibited morphologies suitable for photocatalytic applications and a UV-Vis absorption range near 2 eV as expected for spinel ferrites. These materials were evaluated as photocatalysts for the degradation of Rhodamine B dye under heterogeneous photocatalysis conditions, simulating solar light irradiation, air injection, and different pH levels (2, 6, and 10). The results showed that the catalytic efficiency was higher for samples with a higher copper content and in a basic medium. Therefore, NixCu(1-x)Fe2O4 mixed ferrites have promising potential as photocatalysts.

https://doi.org/10.1590/1980-5373-mr-2023-0061

Performance of glyphosate-based products applied alone and in combination with herbicides in burndown
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Pereira, Bruno C. S.

; Braz, Guilherme B. P.

; Souza, Matheus de F.

; Reginaldo, Laís T. R. T.

; Ferreira, Camila J. B.

Revista Caatinga

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2023, Volume 36 Nº 4 Páginas 765 - 774

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

ABSTRACT The no-tillage system is a conservation system that helps sustainability and agricultural production. The effectiveness of glyphosate control, applied alone or in combination with other herbicides, can be altered depending on the product’s formulation. The objective of the present study was to evaluate the effectiveness of glyphosate in formulations containing different salts and concentrations, applied alone and in combination with other herbicides, in controlling weeds in advanced stages in the pre-sowing burndown operation. The experiment was carried out in the field in an area with a history of high weed infestation. The experiment was conducted in a randomized block design, evaluating eleven treatments and four replicates. The treatments consisted of the application of three glyphosate-based formulations alone and in combination with clethodim and 2,4-D amine herbicides, in addition to a control without herbicide application. The evaluated variables were percentage of weed control and percentage of desiccation. A comparison of means by contrasts was performed to analyze the percentage of weed control. In general, treatments containing products based on glyphosate potassium salt in the composition have slightly better control performance compared to those consisting of glyphosate isopropylamine salt.

RESUMO O sistema de plantio direto é um sistema conservacionista que auxilia na sustentabilidade e a produção agrícola. A eficácia de controle do glyphosate, aplicado isoladamente ou em associação a outros herbicidas, pode ser alterada em função da formulação do produto. O objetivo do presente trabalho foi avaliar a eficácia de glyphosate em formulações contendo diferentes sais e concentrações, aplicado isolado e em associações a outros herbicidas, no controle de plantas daninhas em estádios avançados na operação de dessecação pré-semeadura. O experimento foi realizado a campo em área com histórico de elevada infestação de plantas daninhas. O experimento foi conduzido no delineamento de blocos casualizados, avaliando-se onze tratamentos e quatro repetições. Os tratamentos foram compostos pela aplicação de três formulações à base de glyphosate isolado e em associações com os herbicidas clethodim e 2,4-D amina, além de uma testemunha sem aplicação. As variáveis avaliadas foram porcentagem de controle das plantas daninhas e porcentagem de dessecação. Foi realizado uma comparação de médias por contrastes para analisar a porcentagem de controle de plantas daninhas. De maneira geral, tratamentos contendo produtos à base de glyphosate sal potássico na composição apresentam performance de controle ligeiramente superior em comparação com àqueles constituídos por glyphosate sal de isopropilamina.

https://doi.org/10.1590/1983-21252023v36n404rc

Correlations between Web Searches and COVID-19 Epidemiological Indicators in Brazil
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Locatelli, Marcelo Sartori

; Cunha, Evandro L. T. P

; Guiginski, Janaína

; Franco, Ramon A. S

; Bernardes, Tereza

; Alzamora, Pedro Loures

; Silva, Daniel Victor F. da

; Ganem, Marcelo Augusto S

; Santos, Thiago H. M

; Carvalho, Anne I. R

; Souza, Leandro M. V

; Paixão, Gabriela P. F

; Chaves, Elisa França

; Santos, Guilherme Bezerra dos

; Santos, Rafael Vinícius dos

; Freitas, Amanda Cupertino de

; Flores, Matheus G

; Biezuner, Rachel F

; Cardoso, Rodolfo Lins

; Fonseca, Rodrigo Machado

; Silva, Ana Paula Couto da

; Meira Jr, Wagner

Brazilian Archives of Biology and Technology

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2022, Volume 65 elocation e22210648

Resumo: En | Texto: En | PDF: En

Abstract: COVID-19 rapidly spread across the world in an unprecedented outbreak with a massive number of infected and fatalities. The pandemic was heavily discussed and searched on the internet, which generated big amounts of data related to it. This led to the possibility of attempting to forecast coronavirus indicators using the internet data. For this study, Google Trends statistics for 124 selected search terms related to pandemic were used in an attempt to find which keywords had the best Spearman correlations with a lag, as well as a forecasting model. It was found that keywords related to coronavirus testing among some others, such as “I have contracted covid”, had high correlations (≥0.7) with few weeks of lag (≤4 weeks). Besides that, the ARIMAX model using those keywords had promising results in predicting the increase or decrease of epidemiological indicators, although it was not able to predict their exact values. Thus, we found that Google Trends data may be useful for predicting outbreaks of coronavirus a few weeks before they happen, and may be used as an auxiliary tool in monitoring and forecasting the disease in Brazil.

https://doi.org/10.1590/1678-4324-2022210648

Addition of açai oil during the close-up dry period of Holstein cows improves colostrum quality and immune responses of their calves
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SANTOS, DAIANE S. DOS

; KLAUCK, VANDERLEI

; THEISEN, CLEITON

; BORDIGON, BRUNA

; FARINA, RENAN

; PEREIRA, WANDERSON A.B.

; SOUZA, CARINE F.

; BALDISSERA, MATHEUS D.

; SCHOGOR, ANA LUIZA B.

; VEDOVATTO, MARCELO

; PALMER, ELIZABETH A.

; SILVA, ALEKSANDRO S. DA

Anais da Academia Brasileira de Ciências

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2022, Volume 94 Nº 4 elocation e20201592

Resumo: En | Texto: En | PDF: En

Abstract This study evaluated of the effects of açai oil during the close-up dry period of Holstein cows on colostrum quality, as well as on the immune and antioxidant responses of their calves. Sixteen multiparous cows were assigned randomly to two treatments: 1) CONTROL (n = 8) - 4.48% of soybean oil/concentrate; 2) AÇAI (n =8) - 4.48% of açai oil/concentrate. Cows fed with açai oil had greater (P≤0.04) colostrum concentrations of immunoglobulins (Ig) G (1st and 2nd milking), IgG heavy chains, IgA (only at 1st milking), alpha-lactalbumin (1st milking), total protein, and antioxidant capacity against peroxyl radicals (only at 1st milking). Cows fed with açai oil had greater serum concentrations of globulin (only on the day of calving) and total protein (only on the day of calving) (P = 0.03). Calves born of cows fed with açai oil had greater serum concentrations of total protein (only 24 and 48 h after calving) and serum concentration of IgG heavy chain (only 24 h after calving) and globulin (only 24 and 48 h after calving) (P = 0.01). These data suggest that the addition of açai oil in the cow feed during the close-up dry period boosted immunity in their calves by altering the composition of colostrum.

https://doi.org/10.1590/0001-3765202220201592

Whey Isolation from Rejected Human Milk and Its Lipid Content Characterization by GC-FID and ESI-MS
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Alves, Eloize S.

; Castro, Matheus C.

; Saqueti, Bruno H. F.

; Manin, Luciana P.

; Silveira, Roberta da

; Souza, Patrícia M.

; Santos, Oscar O.

; Visentainer, Jesuí V.

Journal of the Brazilian Chemical Society

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Set 2021, Volume 32 Nº 9 Páginas 1884 - 1894

Resumo: En | Texto: En | PDF: En

The present work intends to obtain and characterize a milk by-product: the human whey (HW), in order to avoid the excessive disposal of human milk (HM). The characterization was performed through analyzes of the chemical composition and fatty acids (FAs) and the triacylglycerol (TAG) lipid profile. The results indicated that the chemical composition altered significantly after the HW obtained, except for the percentage of ash and carbohydrates. About the FA composition, it was observed that strictly essential FA, essential FA and other FAs found in HM remained present in HW. For the nutritional lipids quality, the atherogenicity and the thrombogenicity indices presented desirable values, and the TAGs lipid profile revealed a variation in the analyzed samples. Therefore, it can be concluded that the characterized HW has potential for application in isolated form or to be used as an ingredient in other foods.

https://doi.org/10.21577/0103-5053.20210092 32 downloads

Genetic diversity in two threatened species of guitarfish (Elasmobranchii: Rhinobatidae) from the Brazilian and Argentinian coasts: an alert for conservation
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Cruz, Vanessa P.

; Adachi, Aisni M.C. L.

; Oliveira, Pablo H.

; Ribeiro, Giovana S.

; Paim, Fabilene G.

; Souza, Bruno C.

; Rodrigues, Alexandre S.F.

; Vianna, Marcelo

; Delpiani, Sergio M.

; Díaz de Astarloa, Juan Martín

; Rotundo, Matheus M.

; Mendonça, Fernando F.

; Oliveira, Claudio

; Lessa, Rosangela P.

; Foresti, Fausto

Neotropical Ichthyology

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2021, Volume 19 Nº 2 elocation e210012

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

Resumo As raias violas Pseudobatos horkelii e Pseudobatos percellens, são listados como “Criticamente em Perigo” (CR) e “Em Perigo” (EN), respectivamente. Ambas as espécies ocorrem no Sul do Oceano Atlântico. Considerando a falta de dados sobre a estrutura genética dessas espécies, o presente estudo avaliou a variabilidade genética e a estrutura populacional de P. horkelii e P. percellens na região sudeste do Brasil e litoral norte da Argentina, com base em sequências de DNA mitocondrial, região de controle (D-loop). Amostras de 135 indivíduos de P. horkelii analisados em seis localidades, situadas no norte da Argentina e ao longo da costa dos estados brasileiros. A média da diversidade nucleotídica foi de 0.0053, o índice ΦST foi de 0.4277 e a análise demográfica de P. horkelii, indicou a existência de estabilidade das populações, com D = 0.9929, Fus = 2.0155, SSD = 0.0817, R = 0.2153. Em 101 exemplares de P. percellens, foram analisados em seis localidades brasileiras ao longo do litoral de Santa Catarina, Paraná e São Paulo. A diversidade nucleotídica média foi de 0.0014 e o valor ΦST de 0.2921, a análise demográfica indicou uma alta taxa de migração de P. percellens entre as localidades analisadas, com D = 0.5222, FS = 0.3528, SSD = 0.01785, R = 0.3890.

Abstract The guitarfishes Pseudobatos horkelii and Pseudobatos percellens meet the criteria for threatened status as Critically Endangered (CR) and Endangered (EN), respectively. Both species occur in the Southern Atlantic Ocean. Considering the lack of data on the genetic structure of these species, the present study evaluated the genetic variability and population structure of the P. horkelii and P. percellens in the southern region of Brazil and the northern coast of Argentina, based on sequences of mitochondrial DNA, Control Region (D-loop). Samples of P. horkelii (n = 135) were analyzed in six localities situated in Northern Argentina, along the Brazilian states’ coast. The mean of nucleotide diversity was 0.0053, the ΦST was 0.4277 and demographic analysis of P. horkelii suggests the existence of stability of the populations, with D = 0.9929, FS = 2.0155, SSD = 0.0817, R = 0.2153. In P. percellens (n = 101) were analyzed from six Brazilian localities along the coast of Santa Catarina, Paraná, and São Paulo. The mean nucleotide diversity was 0.0014 and ΦST value of 0.2921, the demographic analysis indicates a high migration rate of P. percellens among the localities evaluated, with D = 0.5222, FS = 0.3528, SSD = 0.01785, R = 0.3890.

https://doi.org/10.1590/1982-0224-2021-0012 156 downloads

The addition of green propolis to laying hens had positive effects on egg quality: lower bacteria counts in the shell and lipid peroxidation in the yolk
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CASAGRANDE, ANA CLAUDIA

; MACHADO, GIOVANA C.

; BRUNETTO, ANDREI L.

; GALLI, GABRIELA M.

; ROSA, GILNEIA DA

; ARAUJO, DENISE N.

; BOIAGO, MARCEL M.

; SOUZA, CARINE F.

; BALDISSERA, MATHEUS M.

; SILVA, ALEKSANDRO S. DA

Anais da Academia Brasileira de Ciências

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2021, Volume 93 elocation e20210315

Resumo: En | Texto: En | PDF: En

Abstract This study aimed to determine whether the addition of green propolis extract to the diet of laying hens would improve egg quality and bird performance and decrease bacterial contamination of eggs. Forty-five brown Hy-line laying hens were used, divided into five groups with three replicates each and three animals per cage: T0 - diet without propolis; T5 - 5 grams of propolis per kg of feed; T10 - 10 grams of propolis per kg of feed; T20 - 20 grams of propolis per kg of feed and T30 - 30 grams of propolis per kg of feed. The quality of fresh eggs was made on day 21 of the experiment, and eggs were stored for 21 days. Greater specific gravity was observed in fresh eggs in T5 birds and stored eggs for T10. TBARS in fresh eggs, we found that T30 eggs had lower levels compared to other treatments. T20 eggs had the lowest total bacterial count and the lowest total coliform count in the eggshells of T10 and T20 chickens. The count of E. coli in the peel was lower for T20 and T30 than T0 and T5. The consumption of propolis did not interfere with the hens’ egg production rate but reduced food intake and consequently reduced feed conversion. We concluded that the addition of green propolis in the diet of laying birds proved efficient in reducing bacterial contamination in the eggshells and reducing the lipid peroxidation of fresh and stored eggs.

https://doi.org/10.1590/0001-3765202120210315 1 downloads

10.

Gaseous exchanges of corn and weeds under competition and water regimes
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Freitas, Claudia D. M.

; Pamplona, Juliana de P.

; Lins, Hamurábi A.

; Souza, Matheus de F.

; Dombroski, Jeferson L. D.

; Silva, Daniel V.

Revista Brasileira de Engenharia Agrícola e Ambiental

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Jul 2020, Volume 24 Nº 7 Páginas 465 - 473

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

RESUMO O déficit hídrico pode alterar funções fisiológicas vitais e afetar negativamente o crescimento das plantas. Esses efeitos podem ser intensificados pelas plantas daninhas que competem pela água disponível para as culturas. O objetivo foi avaliar os efeitos da competição e do déficit hídrico temporário do solo sobre a transpiração (E), condutância estomática (gs) e taxa fotossintética (A) do milho, da Urochloa decumbens e da Bidens pilosa L. O delineamento experimental foi em blocos casualizados, com oito repetições. Os tratamentos foram arranjados em esquema fatorial 5 x 2, com o primeiro fator correspondente às espécies milho + U. decumbens, milho + B. pilosa, e milho, U. decumbens e B. pilosa sem competição, e o segundo fator dois regimes hídricos, irrigação diária e restrição hídrica, que correspondeu à suspensão da irrigação desde o início do estágio V3 do milho até o momento em que seus estômatos ficaram totalmente fechados. As espécies B. pilosa e U. decumbens agravaram em diferentes intensidades os efeitos negativos sobre E, gs e A do milho em condição de restrição hídrica. A U. decumbens foi mais agressiva em relação a B. pilosa em competição com o milho, em ambos regimes hídricos. A competição com o milho afetou a E e gs da U. decumbens nos dois regimes hídricos, mas a A foi alterada sob déficit hídrico. Por outro lado, os componentes fisiológicos de B. pilosa não foram afetadas pela competição com o milho, nos dois regimes hídricos.

ABSTRACT Water deficits can alter vital physiological functions and negatively affect plant growth. These effects can be intensified by weeds competing for water available to crops. The objective of this study was to evaluate the effects of competition and temporary soil water deficit on the transpiration (E), stomatal conductance (gs) and photosynthetic rate (A) of corn, Urochloa decumbens, and Bidens pilosa L. The experimental design was in randomized blocks with eight repetitions. The treatments were arranged in a 5 x 2 factorial scheme, with the first factor corresponding to the species: corn + U. decumbens, corn + B. pilosa, and corn, U. decumbens, and B. pilosa without competition. The second factor was two water regimes: daily irrigation and water restriction, which corresponded to the suspension of irrigation from the beginning of the V3 stage of corn until the time when their stomata were completely closed. The species B. pilosa and U. decumbens worsened the negative effects on E, gs, and A of corn at different intensities under water restriction. The U. decumbens was more aggressive in relation to B. pilosa while coexisting with corn in both water regimes. The competition with corn affected the E and gs of U. decumbens in the two water regimes, but the A was altered under water deficit. On the other hand, the physiological components of B. pilosa were not affected by its coexistence with corn in the two water regimes.

https://doi.org/10.1590/1807-1929/agriambi.v24n7p465-473 433 downloads

11.

200.000 IU of vitamin D does not reduce resting Blood Pressure and Inhibit Post-Exercise Hypotension in elderly women: a pilot study
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GONÇALVES, MARIA DA CONCEIÇÃO R.

; MIRANDA NETO, MANOEL

; CAVALCANTE, ISA G.M.

; SEBADELHE, VITTÓRIA R.R.J.

; SOUZA, MICHELE F. De

; NEVES, JULIANA P.R.

; SOUZA, FLAVIA T.L. DE

; TAVARES, RENATA L.

; COSTA, MATHEUS S.

; SILVA, ALEXANDRE S.

Anais da Academia Brasileira de Ciências

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2020, Volume 92 Nº 1 elocation e20190227

Resumo: En | Texto: En | PDF: En

Abstract Given the scarcity of studies with elderly and the existence of studies investigating the effect of vitamin D supplementation in PEH (post exercise hypotension), this study evaluated the effect of a single megadose of vitamin D on resting blood pressure (RBP) and post-exercise hypotension (PEH) in the elderly. 11 hypertensive elderly women (70.3 ± 1.7 years) received a single megadose of 200.000 IU of cholecalciferol or a placebo, orally, through capsules. On day 7, the subjects performed 30 minutes of aerobic exercise with blood pressure measurement before exercise and every 10 minutes after exercise during 60 minutes, besides cardiac autonomic modulation. RBP did not significantly change. Exercise promoted significant systolic PEH only in one moment post exercise in treated group and in the placebo group promoted significant systolic PEH at four moments. Significant diastolic PEH did not occur in any of the groups. Sympathovagal activity increased at post exercise balance in supplemented subjects at 20 min, 40 min, 50 min and 60 min when compared to rest; this increase was not observed in the placebo. A megadose of vitamin D did not reduce RBP, promoted partial inhibition of systolic PEH and increased sympathovagal balance.

https://doi.org/10.1590/0001-3765202020190227 1055 downloads

12.

Residual and immediate effect after 16 applications of organic sources on yield and nitrogen use efficiency in black oat and corn
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Bacca, Alessandra

; Ceretta, Carlos Alberto

; Kulmann, Matheus Severo de Souza

; Souza, Rodrigo Otavio Schneider

; Ferreira, Paulo Ademar Avelar

; Rodrigues, Lucas Antonio Telles

; Marchezan, Carina

; Garlet, Luana Paula

; Brunetto, Gustavo

Revista Brasileira de Ciência do Solo

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2020, Volume 44 elocation e0190013

Resumo: En | Texto: En | PDF: En

ABSTRACT Soils with a long-term history of animal manure application exhibit higher residual effects of nitrogen (N) in soil and can affect the efficiency with which N will be used. This study aimed to evaluate how the immediate and residual effect of 16 applications of animal manure reflects on yields of black oat and corn rotation system, as well as N use efficiency. The study was carried out in no-tillage from 2004 to 2016 in Brazil. The treatments were pig slurry (PS), dairy slurry (DS), pig deep-litter (PL), mineral fertilizer (MF), and control (C). Prior to the sowing of black oat, in which 16 animal manure applications had already been made, an area of the soil was delimited where the treatments were not applied. This area was referred to as unfertilized (U) soil. Applications were carried out in the remaining area and were referred to as fertilized (F) soil. The highest dry matter yield and N accumulation in black oat and corn were found in F soils treated with DS and PL, respectively. In corn, the highest grain yield and N accumulation in grains were found with DS and PS. In U soil, the 16 applications (of DS especially) resulted in yields and N accumulation greater than the control and MF, but lower than those in F. The highest N use efficiency was found with DS. The history of animal manure applications was not enough to rule out additional applications in the following years.

https://doi.org/10.36783/18069657rbcs20190013 460 downloads

13.

Effects of the inclusion of açai oil in diet of prepartum Holstein cows on milk production, somatic cell counts and future lactation
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SANTOS, DAIANE S. DOS

; KLAUCK, VANDERLEI

; SOUZA, CARINE F.

; BALDISSERA, MATHEUS D.

; THEISEN, CLEITON

; BORDIGNON, BRUNA

; ALBA, DAVI F.

; REIS, JOÃO H.

; GEBERT, ROGER R.

; VEDOVATTO, MARCELO

; SILVA, ALEKSANDRO S. DA

Anais da Academia Brasileira de Ciências

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2020, Volume 92 Nº 4 elocation e20200149

Resumo: En | Texto: En | PDF: En

Abstract We measured the effects of açai oil in the diets of prepartum cows to evaluate health, milk production and quality. Sixteen Holstein cows were divided into two groups: SOY used as control, and AÇAI, test group. Occurred inclusion of 4% soybean or açai oils was provided in the concentrate starting at 20 days prepartum [d -20 to d 0 (partum-day)]. The AÇAI diet increased (P=0.01) milk production (d 10 and 20) and reduced somatic cell count (d 20). In milk, no effects were detected (P≥0.10) for concentration of fat, lactose or protein as well as in terms of serum concentration of calcium, albumin or triglycerides. AÇAI diet tended to increase (P=0.09) serum concentrations of total protein, glutathione transferase (d 4), and total antioxidant capacity (d 4 and 10) and increased (P≤0.05) globulin, gamma-glutamyl transferase, superoxide dismutase and glutathione peroxidase (d 4). Further, AÇAI diet reduced the serum concentration of creatine kinase (P≤0.05) (d 0, 4 and 10), reactive oxygen species (d 0 and 4) and lipoperoxidation (d 0) and tended to reduce aspartate transaminase activity (P=0.07; d 0 and 4). Açai oil in the diets in prepartum cows improved their health as well as milk production and quality.

https://doi.org/10.1590/0001-3765202020200149 476 downloads

14.

Rheumatic heart disease in the modern era: recent developments and current challenges
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Leal, Matheus Tozatto Baptista Coelho

; Passos, Livia Silva Araújo

; Guarçoni, Felipe Vieira

; Aguiar, João Marcelo de Souza

; Silva, Rafael Benjamim Rosa da

; Paula, Thiago Mendonça Nunes de

; Santos, Rafael Figueiredo dos

; Nassif, Maria Cecília Landim

; Gomes, Nayana F. A.

; Tan, Timothy C.

; Nunes, Maria Carmo Pereira

Revista da Sociedade Brasileira de Medicina Tropical

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2019, Volume 52 elocation e20180041

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Abstract Rheumatic heart disease (RHD) remains a major cause of preventable death and disability in children and young adults. Despite significant advances in medical technology and increased understanding of disease mechanisms, RHD continues to be a serious public health problem throughout the world, especially in low- and middle-income countries. Echocardiographic screening has played a key role in improving the accuracy of diagnosing RHD and has highlighted the disease burden. Most affected patients present with severe valve disease and limited access to life-saving cardiac surgery or percutaneous valve intervention, contributing to increased mortality and other complications. Although understanding of disease pathogenesis has advanced in recent years, key questions remain to be addressed. Preventing or providing early treatment for streptococcal infections is the most important step in reducing the burden of this disease.

https://doi.org/10.1590/0037-8682-0041-2019 7841 downloads

15.

The Surface Treatment of Niobium Superconducting Reentrant Cavities by Means of High Temperature Nitrogen Plasma Based Ion Implantation
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Oliveira, Rogério Moraes

; Aguiar, Odylio Denys

; Araujo, Michel Felipe Lima de

; Silva, Matheus M. N. F.

; Mello, Carina B.

; Ferreira, Elvis

; Liccardo, Vincenzo

; Savonov, Graziela da Silva

; Baba, Koumei

; Souza, Renata Lopes Gonçalves de

Materials Research

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2019, Volume 22 Nº 6 elocation e20190277

Resumo: En | Texto: En | PDF: En

High Temperature Nitrogen Plasma Based Ion Implantation (HT-NPBII) has been used to treat the surface of niobium superconducting reentrant cavities, which are part of parametric transducers in a resonant-mass gravitational wave detector. The aim is to enhance the corresponding electrical quality factors (Q-factors) which are closely related with the increase of the sensitivity of the system. In this experiment, the cavities are immersed in plasma and bombarded by energetic nitrogen ions, which are implanted into the surfaces of these heated substrates. The heating temperature of the cavities is controlled during the treatment and its level directly affects the N implantation depth profile due to the diffusion process. Additional tailoring of the nitrogen doping can be performed by the adjustment of the intensity and the duty cycle of the high negative voltage pulses used for ion implantation. For implantations performed at 5 kV /20 µs /300 Hz/ 700 °C, nitrogen atoms occupy interstitial spaces in the crystal lattice of niobium. The treatment of niobium superconducting cavities under these parameters caused the enhancement of two orders of magnitude of respective Q-factors. A set of characterization techniques was performed herein in order to help with the understanding of the underlying mechanism behind this phenomenon.

https://doi.org/10.1590/1980-5373-mr-2019-0277 676 downloads

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