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ABSTRACT This paper presents a new irrigation controller based on fuzzy logic that uses weather forecast data and crop characteristics to evaluate the real-time need for irrigation of rice crops and to increase the efficiency of irrigation systems. Tests were performed with real data obtained from three different crop fields in Rio Grande do Sul State, Brazil, and on four meteorologically different days of the 2021/2022 harvest to demonstrate the ability to reduce power consumption for irrigation; the power consumption on days of heavy precipitation was above 80% under all simulated conditions. Depending on the size of the crop and the tested meteorological conditions, the minimum reductions in energy consumption were between 33-66% on dry days with no precipitation forecast. More than 15% reduction in the flow of the water catchment was also observed, even in the most adverse farming scenarios. This study reveals the necessity for technological advances in rice-crop irrigation systems to increase the efficiency of flood irrigation in large areas for reducing electricity consumption, increasing the profitability of rural producers, and ensuring the preservation and availability of water resources.

RESUMO Este artigo propõe o desenvolvimento de um novo controlador para irrigação, baseado na lógica fuzzy, o qual utiliza previsão meteorológica e características da lavoura para avaliar a real necessidade de irrigação de lavouras de arroz e elevar a eficiência energética destes sistemas de irrigação. Testes realizados com dados reais de três lavouras situadas no Rio Grande do Sul, Brasil, e de quatro dias meteorologicamente distintos da safra 2021/2022, demonstram a capacidade de redução no consumo de energia elétrica, que em dias de precipitação acentuada ficou acima de 80% em todas as condições simuladas. Em dias secos, sem previsão de precipitação, as reduções mínimas de consumo de energia ficaram entre 33 e 66%, de acordo com o tamanho da lavoura e as condições meteorológicas testadas. Também foi verificada a redução da vazão de captação de água, que superou 15% mesmo nos cenários de lavoura mais adversos. Este estudo revela a necessidade de agregar avanços tecnológicos aos sistemas de irrigação de lavouras de arroz, de forma a elevar a eficiência dos processos de irrigação por inundação de grandes áreas, como forma de reduzir o consumo de energia elétrica, aumentar a rentabilidade do produtor rural e garantir a preservação e a disponibilidade dos recursos hídricos.

https://doi.org/10.1590/1807-1929/agriambi.v27n10p779-784

Reproductive and vegetative phenology of the micro endemic Stachytarpheta cassiae (Verbenaceae)
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Guimarães, Gesline Ferreira

; Soares, Michel Pereira

; Santos, Renata Moreira dos

; Santos, Fabíola Mendes dos

; Ashworth, Lorena

; Negreiros, Daniel

; Aguilar, Ramiro

; Fernandes, Geraldo Wilson

Rodriguésia

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2023, Volume 74 elocation e00412022

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

Abstract The flora of the Brazilian rupestrian grasslands represents a hotspot of species richness and endemisms. Stachytarpheta cassiae (Verbenaceae), is a micro endemic species, from which nothing is known. Here, we quantified the activity and intensity of vegetative and reproductive phenophases throughout 12 months and tested for their seasonality and their relationship with local climatic variables. Both vegetative and reproductive phenophases were continuous. No seasonality was observed in the vegetative phenophases and none of them was influenced by climatic variables. Only flower buds and mature fruits’ intensities showed seasonality in February (rainy season) and July (dry season), respectively. Accordingly, increased temperature and humidity combined explained increased production of flower buds whereas decreased rainfall explained increased mature fruits. Higher intensity in flower buds may respond to similar climatic conditions as other species in the community. However, S. cassiae is much different as it continues producing flowers continuously. Higher intensity of mature fruits in the dry season is expected as their seeds are abiotically dispersed. Due to constant flower and leaf production, S. cassia may be a key species for the conservation of many vertebrate and invertebrate species and for maintaining the biogeochemical functioning of the impoverished soils of the rupestrian grasslands.

Resumo A flora dos campos rupestres brasileiros representa um hotspot de riqueza de espécies e endemismos. Stachytarpheta cassiae (Verbenaceae) é uma espécie micro endêmica, da qual nada se sabe sobre sua história natural. Aqui, quantificamos ao longo de 12 meses a atividade e intensidade das fenofases vegetativas e reprodutivas e testamos sua sazonalidade e sua relação com as variáveis climáticas locais. Tanto as fenofases vegetativas quanto as reprodutivas foram continuas. Não foi observada nenhuma sazonalidade nas fases vegetativas e nenhuma delas foi influenciada por variáveis climáticas. Somente os botões florais e a intensidade de frutos maduros mostraram sazonalidade significativa em fevereiro (estação chuvosa) e julho (estação seca), respectivamente. Assim, o aumento da temperatura e umidade combinados explicaram o aumento da produção de botões florais, enquanto a diminuição da precipitação explicou o aumento dos frutos maduros. A maior intensidade dos botões florais pode responder a condições climáticas semelhantes às de outras espécies na comunidade. No entanto, S. cassiae é muito diferente, pois produz flores continuamente. É esperada maior intensidade de frutos maduros na estação seca, já que suas sementes são dispersas por vetores abióticos. Devido à produção constante de flores e folhas, S. cassia pode ser uma espécie chave para a conservação de muitas espécies de vertebrados e invertebrados e para a manutenção do funcionamento biogeoquímico dos solos empobrecidos dos campos rupestres.

https://doi.org/10.1590/2175-7860202374019

Oral mucositis and microbial status in acute lymphoblastic leukemia subjects undergoing high-dose chemotherapy
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Duarte, Ana Cláudia Nunes

; Barbosa, Anderson Nogueira

; Saito, Cristiane Pereira Borges

; Paula, Erich Vinicius de

; Saito, Daniel

Brazilian Journal of Oral Sciences

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2023, Volume 22 elocation e237697

Resumo: En | Texto: En | PDF: En

Aim To assess oral microbial status in patients with acute lymphoblastic leukemia (ALL) undergoing high-dose chemotherapy and to unravel possible associations between nosocomial pathogens and the establishment of chemotherapy-induced oral mucositis (CIOM). Methods Oral mucosa, saliva, and peripheral blood samples were collected from 46 ALL subjects one day prior to chemotherapy (D0) and 2 weeks after treatment initiation (D14). Clinical intraoral inspection was performed by a single practitioner, with mucositis classification performed according to the WHO oral toxicity scale. Blood components were quantified by automatic flow cytometry, while oral Staphylococcus aureus and Pseudomonas aeruginosa were detected by Polymerase Chain Reaction with species-specific primers. Associations among bacteria and clinical findings were determined by Fisher’s Exact test, longitudinal bacterial changes by paired Macnemar, and correlations among blood parameters and mucositis status or bacteria via Mann-Whitney. Results S. aureus displayed higher detection rates at D14 (p < 0.05) and was positively associated with mucositis, adoption of a non-solid diet (all p < 0.001), nausea and fever (all p < 0.05). Conversely, P. aeruginosa did not correlate to CIOM clinical parameters. At the systemic standpoint, lower hemoglobin levels associated with CIOM and fever events (all p < 0.01). Conclusion The study evidences S. aureus as a potential pathogen in ALL-CIOM, reaffirming microbial control as an important preventive measure during high-dose immunosuppressive therapy. The weight of non-white-blood-cell parameters should be validated as novel CIOM biomarkers in prospective research.

https://doi.org/10.20396/bjos.v22i00.8667697

Intra-genotypic variability in elite parent lines of papaya
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RODRIGUES, ALEX S.

; RAMOS, HELAINE C.C.

; MIRANDA, DANIEL P.

; PIROVANI, ADRIANA A.V.

; SANTA-CATARINA, RENATO

; DUARTE, RAFAELA P.

; BRAGA, CATIANE S.

; BOHRY, DIEIMES

; PEREIRA, MESSIAS G.

Anais da Academia Brasileira de Ciências

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2023, Volume 95 Nº 1 elocation e20220468

Resumo: En | Texto: En | PDF: En

Abstract This study aimed to characterize papaya lines via microsatellite markers, and select genotypes based on the fixation index in order to promote the genetic purification of important commercial hybrids parent lines. Overall, 400 genotypes from three parental lines (JS-12, SS-72/12, and Sekati) were genotyped. Expected (HE), observed (HO) heterozygosity, and fixation index (F), were estimated. Genetic distances were estimated using an unweighted index, which was graphically presented via cluster analysis using the UPGMA and PCoA. Intra-genotypic variability was detected in both JS-12 and Sekati lines, while an absence of it was observed in SS-72/12. Such variability may positively contribute to the fitting of ‘UENF/Caliman 01’ and ‘UC-10’ hybrids into the traits of commercial interest how size and weight fruit. Regarding the fixation index, 293 genotypes showed maximum values (F=1) facilitating the genotypes selection process. Concerning population analysis, a close proximity between heterotic group ‘Formosa’ lines was observed, while a greater distance among ‘Solo’ group ones, and this enables systematic exploitation of such material. The fixation index maximum enabled the 80 genotypes selection thereby contributing to the parents genetic purification, since, the selected genotypes will be used in future hybridization steps to generate hybrids fitted into the traits of commercial interest.

https://doi.org/10.1590/0001-3765202320220468

Desenvolvimento de um purificador de ar com radiação UVC e filtro HEPA no contexto de COVID-19
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Zhang, Julio Min Fei

; Andrade, Alyssa El Chihimi de

; Machado, Felipe Augusto Moraes

; Ghilardi, Larissa Bornia

; Almeida, Barbara Medeiros

; Falararo, Beatriz Vilas Boas Pugliese

; Machado, Gustavo Alves

; Emygdio, Ana Paula Mendes

; Pereira, Guilherme Martins

; Magalhães, Daniel Varela

; Forner-Cordero, Arturo

; Vasconcellos, Pérola de Castro

Engenharia Sanitaria e Ambiental

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Nov 2022, Volume 27 Nº 6 Páginas 1113 - 1122

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

RESUMO A transmissão de infecções respiratórias tem importante impacto na saúde humana, sobretudo no atual contexto da pandemia de COVID-19. Neste trabalho, discute-se um purificador de ar que utiliza radiação ultravioleta-C (UVC) e filtro high efficiency particulate air (HEPA) como mecanismos para descontaminar ambientes internos com baixa circulação de ar. Para avaliar os parâmetros físico-químicos do equipamento e sua ação microbicida, foram determinados a irradiância produzida pela lâmpada, a vazão na entrada e saída do dispositivo, as alterações na concentração de ozônio e o potencial de descontaminação do equipamento para Staphylococcus aureus, Escherichia coli e Candida albicans. A dose total de radiação UVC que o ar recebe ao passar pelo equipamento foi de 801,4 μJ cm-2, o que representaria a inativação de até 80% de Sars-CoV-2 no ar. Além disso, a eficiência de filtração foi reduzida para cerca de 60% com a diminuição do tamanho da partícula para partículas com menos de 1 μm e manteve-se acima de 90% para MP2,5 e MP10. Nos testes microbiológicos, observou-se redução de 99,4, 99,9 e 99,5% para S. aureus, E. coli e C. albicans, respectivamente, em 11 minutos.

ABSTRACT The transmission of respiratory infections has an important role on human health, especially in the current context of the COVID-19 pandemic. In this work, we present the assessment of an air purifier that uses ultraviolet-C (UVC) radiation and a “High Efficiency Particulate Air” (HEPA) filter as mechanisms to decontaminate indoor environments with low air circulation. To assess the physicochemical and microbicidal characteristics of the equipment, the irradiance produced by the lamp, the flow rate at the entrance and exit of the device, possible changes in the ozone concentration and the equipment's decontamination potential for Staphylococcus aureus, Escherichia coli and Candida albicans. The total dose of UVC radiation that the air receives when passing through the equipment was 801.4 μJ cm-2, which would represent an inactivation of up to 80% of SARS-CoV-2 in the air. Furthermore, the filtration efficiency dropped with smaller particle diameter, and reduced to around 60% for particles with less than 1 μm and remained above 90% for PM2.5 and PM10. In microbiological tests, there was a reduction of 99.4%, 99.9% and 99.5% for S aureus, E. coli and C. albicans, respectively, in 11 minutes.

https://doi.org/10.1590/s1413-415220220114

A qualidade do ambiente domiciliar influencia nas habilidades funcionais de crianças na primeiríssima infância?
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Lima, Mylena Francielle R.

; Costa, Lucas B.

; Pereira, Daniel Gonçalves

; Gomes, Wellington Fabiano

; Oliveira, Vinícius C.

; Morais, Rosane Luzia S.

Fisioterapia e Pesquisa

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Ago 2022, Volume 29 Nº 2 Páginas 196 - 202

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

RESUMO A literatura extensamente associa o desenvolvimento infantil à qualidade da estimulação ambiental. Entretanto, são escassos os estudos que verificam se tal associação tem relação com as habilidades funcionais da criança. Este estudo tem por objetivo investigar quais oportunidades no ambiente domiciliar estão associadas e explicam às habilidades funcionais de mobilidade e função social de crianças na primeiríssima infância. Trata-se de um estudo transversal e exploratório feito com 74 crianças entre 6 e 18 meses. Para avaliar as oportunidades presentes no ambiente domiciliar, foi utilizado o instrumento affordances in the home environment motor development - infant scale. Para avaliar as habilidades funcionais das crianças, foi utilizado o inventário de avaliação pediátrica de incapacidade. Observou-se que a mobilidade das crianças pode ser explicada em 45,6% (R² ajustado=0,45) e a função social em 30% (R² ajustado=0,30) pela quantidade de brinquedos de motricidade grossa, pelos equipamentos e pela variedade de estimulação presente no ambiente domiciliar. Conclui-se que posições, brinquedos e materiais que mantêm a criança mais restrita e menos ativa exercem influência negativa. Por outro lado, brinquedos que oportunizam um maior deslocamento e interação favorecem as habilidades funcionais de mobilidade e função social.

ABSTRACT The literature associates child development with the quality of the environment stimulation. However, few studies verify if this is associated with the infant’s functional abilities. This study aims to assess which opportunities in the home environment are associated with functional mobility skills and social function of infants in early childhood and explain them. This is a cross-sectional and exploratory study with 74 infants aged from six to 18 months. The affordances in the home environment motor development - infant scale instrument was used to evaluate the opportunities in the home environment. The pediatric evaluation of disability inventory was used to assess the infants’ functional abilities. We observed that infants’ mobility can be explained in 45.6% (Adjusted R²=0.45) and social function in 30% (Adjusted R²=0.30) by the amount of gross motor skills toys, equipment and variety of stimulation in the home environment. We concluded that positions, toys, and materials that keep the infant more restricted and less active have a negative effect. On the other hand, toys that offer greater displacement and interaction favor the functional mobility skills and social function.

RESUMEN La literatura ha asociado ampliamente el desarrollo infantil con la calidad de la estimulación en el entorno. Sin embargo, pocos estudios han verificado si esta asociación está relacionada con las habilidades funcionales del niño. Este estudio tiene como objetivo analizar y explicar qué oportunidades en el entorno del hogar están asociadas con las habilidades funcionales de movilidad y función social de niños en la primera infancia. Se trata de un estudio transversal y exploratorio, realizado con 74 niños de los 6 a los 18 meses de edad. Para evaluar las oportunidades presentes en el entorno del hogar, se utilizó el instrumento affordances in the home environment motor development - infant scale. Para evaluar las habilidades funcionales de los niños, se utilizó el inventario para la evaluación pediátrica de la discapacidad. Se observó que la movilidad de los niños se puede explicar en un 45,6% (R² ajustado=0,45) y la función social en un 30% (R² ajustado=0,30) por la cantidad de juguetes de motricidad gruesa, equipos y por la variedad de estimulación presente en el entorno del hogar. Se concluye que las posiciones, juguetes y materiales que mantienen al niño más restringido y menos activo ejercen una influencia negativa. Por otro lado, los juguetes que aportan mayor movilidad e interacción favorecen las habilidades funcionales de movilidad y función social del niño.

https://doi.org/10.1590/1809-2950/21025429022022pt

Art and science: impact of semioccluded vocal tract exercises and choral singing on quality of life in subjects with congenital GH deficiency
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Andrade, Bruna M. R. de

; Valença, Eugenia H. O.

; Salvatori, Roberto

; Oliveira Neto, Luiz A.

; Souza, Anita H. O.

; Oliveira, Alaíde H. A.

; Oliveira, Mario C.P.

; Melo, Enaldo V.

; Carvalho, Susana de

; Sales, Neuza J

; Monteiro, Gisane C.

; Lima, José Marcel de

; Annunziato, Marcos Felipe Harder

; Mannis, Guilherme Daniel Breternitz

; Souza, Lucas E. de A.

; Goes, Yasmin D.

; Carvalho, Thayza S.

; Farias, Celiane de

; Santos, Michela P. dos

; Cardoso, Gabriela P. F.

; Sousa, Carla S. Pereira

; Santana, Julia Rodrigues

; Sales, Ester Almeida

; d’Avila, Jeferson Sampaio

; Aguiar-Oliveira, Manuel H.

Archives of Endocrinology and Metabolism

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Abr 2022, Volume 66 Nº 2 Páginas 198 - 205

Resumo: En | Texto: En | PDF: En

ABSTRACT Objectives: Currently, not much is known about the interactions between voice and growth hormone (GH). We have described large kindred with isolated GH deficiency (IGHD) due to a GHRH receptor mutation, resulting in severe short stature and high-pitched voice. These IGHD individuals have little interest in GH treatment, as they consider themselves “short long-lived people”, rather than patients. Interestingly, they report normal general quality of life, but they rate their Voice-Related Quality of Life (V-RQOL) as low. Here, we assessed the social and auditory-perceptual impacts of artistic-intervention voice therapy with semioccluded vocal tract exercises (SOVTE) and choral singing, on their voices. Material and methods: Seventeen GH-naïve adult IGHD individuals were enrolled in a single-arm interventional pre-post study with 13 weekly sessions of choir singing over 90 days. Outcome measures were V-RQOL scores, self-assessment of voice, and auditory-perceptual analysis (GRBAS scale, G: grade of the severity of dysphonia; R: roughness; B: breathiness; A: asthenia; and S: strain). Results: Marked improvements in total (p = 0.0001), physical (p = 0.0002), and socioemotional (p = 0.0001) V-RQOL scores and in self-assessment of voice (p = 0.004) were found. The general grades of vocal deviation (p = 0.0001), roughness (p = 0.0001), breathiness (p = 0.0001) and strain (p = 0.0001) exhibited accentuated reductions. Conclusions: Voice therapy with semioccluded vocal tract exercises and choral training improved social impact and perceptual voice assessments in IGHD subjects and markedly improved their voice-related quality of life. This is particularly important in a setting where GH replacement therapy is not widely accepted.

https://doi.org/10.20945/2359-3997000000449

Integration of Statistical Models and Computer Simulation in Environmental Accidents: A Study on Leakage of Red Mud in the Pará River, Amazon, Brazil
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Sousa Jr., Pedro M. de

; Pereira, Simone F. P.

; Rocha, Ronaldo M.

; Alves, Mateus H. D.

; Pinheiro, Luciana S.

; Nogueira, Daniel P.

; Teixeira, Orivan M. M.

; Gonçalves, Auriane C. S.

Journal of the Brazilian Chemical Society

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Out 2021, Volume 32 Nº 10 Páginas 1997 - 2008

Resumo: En | Texto: En | PDF: En

The introduction of potentially toxic elements (PTEs) from industrial activities in water bodies, highlights the vulnerability of the environment and the need for actions focused on the implementation of mechanisms that help in the control and remediation of these impacts. The objective of the study was based on the integration of instrumental analytical methods, multivariate statistics, and computer simulation models, with the proposal of implementing realistic scenarios of the red mud plume behavior in the Pará River. The selected location was the municipality of Barcarena-PA, where is located an important alumina/aluminum industrial center. With the aid of the inductively coupled plasma optical emission spectrometer (ICP OES), the chemical elements Al, B, Cr, Fe, Mn, P, Ti, and Zn were quantified and the principal component analysis (PCA) allowed to select Al, B, Fe, P, and Zn as the most relevant with 98.68% of the accumulated variance. Some scenarios were proposed by the simulated hydrodynamic model, which evidenced that the Trambioca community would be the most affected in the first 13 h after the effluent overflowed, and the other locations in domino effect. The main scientific gain of the proposal is the possibility of the predictive scenarios to help the actions of containment and mitigation of environmental damages by public control agencies, institutions involved, and other competent bodies.

https://doi.org/10.21577/0103-5053.20210091 28 downloads

Missed Tillaux Fracture and Syndesmosis Injury in Adult: Arthroscopic Assisted Reduction and Fixation
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Oliveira, Nuno

; Pinho, Pedro

; Baptista, Mário

; Freitas, Daniel

; Varanda, Pedro

; Pereira, Bruno S.

Revista Brasileira de Ortopedia

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Mai 2021, Volume 56 Nº 3 Páginas 399 - 402

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

Resumo As fraturas de Tillaux são fraturas da margem lateral da tíbia distal, geralmente relatadas em crianças entre 12 e 14 anos. Como fraturas intra-articulares, requerem redução e fixação anatômica para evitar complicações pós-traumáticas. Como o mecanismo de lesão é a rotação externa do pé na perna, essas lesões são comumente associadas a outras fraturas ou lesões ligamentares. Atualmente, a artroscopia está sendo cada vez mais utilizada para auxiliar e melhorar o tratamento cirúrgico das fraturas do tornozelo. Os autores descrevem um acompanhamento de 12 meses de um caso raro de uma fratura não percebida de Tillaux associada a lesão por sindesmose em um paciente de politrauma com 76 anos de idade, tratado com sucesso por redução e fixação interna assistida por artroscopia.

Abstract Tillaux fractures are fractures of the lateral margin of the distal tibia, usually reported in children between 12 and 14 years old. As intraarticular fractures, they require anatomic reduction and fixation to avoid posttraumatic complications. Since the injury mechanism is external rotation of the foot on the leg, these injuries are commonly associated with other fractures or ligamentous lesions. Currently, arthroscopy is being increasingly used to assist and improve surgical treatment of ankle fractures. The authors describe a 12-month follow-up of a rare case of a missed Tillaux fracture associated with syndesmosis injury in a 76-year-old polytrauma patient, successfully treated by arthroscopically-assisted reduction and internal fixation.

https://doi.org/10.1055/s-0040-1716759 3 downloads

10.

Alternative Approaches Applied to Inductively Coupled Plasma Techniques: Multi-Flow and Two-Flow Calibration
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Machado, Raquel C.

; Silva, Ana Beatriz S.

; Andrade, Daniel F.

; Pinheiro, Fernanda C.

; Williams, Charles B.

; Donati, George L

; Nogueira, Ana Rita A.

; Pereira-Filho, Edenir R.

Journal of the Brazilian Chemical Society

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Abr 2021, Volume 32 Nº 4 Páginas 842 - 851

Resumo: En | Texto: En | PDF: En

Multi-flow calibration (MFC) is based on monitoring the analytical signal from a single calibration standard solution at several different nebulization gas flow rates (Q), which normalizes plasma conditions and minimizes matrix effects. In the present study, MFC was evaluated, for the first time, applied to inductively coupled plasma optical emission spectrometry (ICP OES) and inductively coupled plasma mass spectrometry (ICP-MS) to analyze different and complex-matrix samples. Al, As, Cd, Cr, Cu, Mn, Pb, and Zn were determined by ICP OES, while As, Cd, Co, Cu, Hg, Mo, Mn, Ni, Se, Sb, Pb, and V were determined by ICP-MS. MFC results were compared with those obtained using external standard calibration (EC) for both techniques and in all cases, MFC showed equal or superior accuracy (recoveries between 80-120%) compared to EC, and lower relative standard deviation (RSDs ≤ 10%). Several tests were also performed using only two nebulization gas flows to build linear models for calibration (called two-flow calibration, TFC) and the accurate results (recoveries ranged from 80 to 110% for ICP OES and from 81 to 102% for ICP-MS) suggests that this strategy can be also applied, resulting in a method with high sample throughput.

https://doi.org/10.21577/0103-5053.20200235 156 downloads

11.

TECHNICAL AND ECONOMIC FEASIBILITY OF USING A VARIABLE-FREQUENCY DRIVE IN MICRO-IRRIGATION SYSTEMS
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Pinto, Marinaldo F.

; Pereira, Diego J. de S.

; Carvalho, Daniel F. de

; Alves, Dinara G.

; Salvador, Conan A.

Engenharia Agrícola

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Fev 2021, Volume 41 Nº 1 Páginas 112 - 118

Resumo: En | Texto: En | PDF: En

ABSTRACT Irrigation is essential for the development of crops in regions with scarcity or irregular rainfall distribution, enabling high productivity. However, the use of water resources and electrical energy leads to a concern with irrigation efficiency. Pressure demand varies during the operations of irrigation systems and the appropriate pressure can be regulated by variable-frequency drives for the power supply of the motor-pump set. This study aimed to analyze the technical and economic feasibility of using a variable-frequency drive to adjust the pressure in subunits of micro-irrigation systems. Laboratory tests were carried out to determine the electrical power consumed in each irrigated subunit for different slopes and the application or not of the variable-frequency drive. Thus, an economic analysis was carried out considering the electricity tariff for group B and rural consumer class, as well as different annual irrigation times. The results showed the potential for energy saving with the use of the variable-frequency drive. Thus, the economic analysis showed that the variable-frequency drive was a better alternative than the dissipative method.

https://doi.org/10.1590/1809-4430-eng.agric.v41n1p112-118/2021 302 downloads

12.

COVID-19: The question of genetic diversity and therapeutic intervention approaches
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Figueiredo, David Livingstone Alves

; Ximenez, João Paulo Bianchi

; Seiva, Fábio Rodrigues Ferreira

; Panis, Carolina

; Bezerra, Rafael dos Santos

; Ferrasa, Adriano

; Cecchini, Alessandra Lourenço

; Medeiros, Alexandra Ivo de

; Almeida, Ana Marisa Fusco

; Ramão, Anelisa

; Boldt, Angelica Beate Winter

; Moya, Carla Fredrichsen

; Chin, Chung Man

; Paula, Daniel de

; Rech, Daniel

; Gradia, Daniela Fiori

; Malheiros, Danielle

; Venturini, Danielle

; Tavares, Eliandro Reis

; Carraro, Emerson

; Ribeiro, Enilze Maria de Souza Fonseca

; Pereira, Evani Marques

; Tuon, Felipe Francisco

; Follador, Franciele Aní Caovilla

; Fernandes, Glaura Scantamburlo Alves

; Volpato, Hélito

; Cólus, Ilce Mara de Syllos

; Oliveira, Jaqueline Carvalho de

; Rodrigues, Jean Henrique da Silva

; Santos, Jean Leandro dos

; Visentainer, Jeane Eliete Laguila

; Brandi, Juliana Cristina

; Serpeloni, Juliana Mara

; Bonini, Juliana Sartori

; Oliveira, Karen Brajão de

; Fiorentin, Karine

; Lucio, Léia Carolina

; Faccin-Galhardi, Ligia Carla

; Ferreto, Lirane Elize Defante

; Lioni, Lucy Megumi Yamauchi

; Consolaro, Marcia Edilaine Lopes

; Vicari, Marcelo Ricardo

; Arbex, Marcos Abdo

; Pileggi, Marcos

; Watanabe, Maria Angelica Ehara

; Costa, Maria Antônia Ramos

; Giannini, Maria José S. Mendes

; Amarante, Marla Karine

; Khalil, Najeh Maissar

; Lima Neto, Quirino Alves de

; Herai, Roberto H.

; Guembarovski, Roberta Losi

; Shinsato, Rogério N.

; Mainardes, Rubiana Mara

; Giuliatti, Silvana

; Yamada-Ogatta, Sueli Fumie

; Gerber, Viviane Knuppel de Quadros

; Pavanelli, Wander Rogério

; Silva, Weber Claudio da

; Petzl-Erler, Maria Luiza

; Valente, Valeria

; Soares, Christiane Pienna

; Cavalli, Luciane Regina

; Silva Jr, Wilson Araujo

Genetics and Molecular Biology

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2021, Volume 44 Nº 1 elocation e20200452

Resumo: En | Texto: En | PDF: En

Abstract Coronavirus disease 2019 (COVID-19), caused by the Severe Acute Respiratory Syndrome Coronavirus type 2 (SARS-CoV-2), is the largest pandemic in modern history with very high infection rates and considerable mortality. The disease, which emerged in China’s Wuhan province, had its first reported case on December 29, 2019, and spread rapidly worldwide. On March 11, 2020, the World Health Organization (WHO) declared the COVID-19 outbreak a pandemic and global health emergency. Since the outbreak, efforts to develop COVID-19 vaccines, engineer new drugs, and evaluate existing ones for drug repurposing have been intensively undertaken to find ways to control this pandemic. COVID-19 therapeutic strategies aim to impair molecular pathways involved in the virus entrance and replication or interfere in the patients’ overreaction and immunopathology. Moreover, nanotechnology could be an approach to boost the activity of new drugs. Several COVID-19 vaccine candidates have received emergency-use or full authorization in one or more countries, and others are being developed and tested. This review assesses the different strategies currently proposed to control COVID-19 and the issues or limitations imposed on some approaches by the human and viral genetic variability.

https://doi.org/10.1590/1678-4685-gmb-2020-0452

13.

High-concentrate diets with fibrous by-products for feedlot Nellore heifers
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CLEEF, ERIC H.C.B. VAN

; OLIVEIRA, PRISCILA S.N. DE

; GALATI, ROSEMARY LAÍS

; FERREIRA, DANIEL S.

; SANTOS, VIVIANE C.

; HOMEM JUNIOR, ANTÔNIO CARLOS

; PEREIRA JUNIOR, SERGIO ANTÔNIO G.

; PARDO, RENÉ MAURICIO P.

; EZEQUIEL, JANE MARIA B.

Anais da Academia Brasileira de Ciências

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2021, Volume 93 Nº 3 elocation e20190731

Resumo: En | Texto: En | PDF: En

Abstract The objective of this study was to evaluate high-concentrate diets and two energy sources on intake, performance and meat quality parameters of feedlot Nellore heifers. Twenty-eight heifers (200 ± 22.5 kg BW) were randomly assigned to four treatments in a 2×2 factorial arrangement: two concentrate levels (70 and 80%) and two energy sources (corn and corn germ meal). At the end of day 112, heifers were slaughtered. There was no interaction (P>0.05) of concentrate levels and energy sources for dry matter intake, unlike crude protein (CP) and neutral detergent fiber (NDF) intakes. The concentrate level of 80% and corn, allowed the highest CP (1.17 kg/day) and NDF (4.05 kg/day) intakes. Final BW (P<0.05) and daily gain (P<0.01) were influenced just by energy source. The carcass composition represented by muscle and fat was affected by concentrate level (P<0.05). Treatments affected (P<0.01) carcass fat deposition, global preference and texture of Longissimus muscle (P<0.05). It was concluded that high proportions of concentrate containing corn as energy source provided the best performance in heifers, and that the total replacement of corn with corn germ meal in high-concentrate diets is not recommended for performance Nellore heifers, but provided good sensory quality to the meat.

https://doi.org/10.1590/0001-3765202120190731 379 downloads

14.

Calibration Strategies Applied to Laser-Induced Breakdown Spectroscopy: A Critical Review of Advances and Challenges
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Costa, Vinicius C.

; Babos, Diego V.

; Castro, Jeyne P.

; Andrade, Daniel F.

; Gamela, Raimundo R.

; Machado, Raquel C.

; Sperança, Marco A.

; Araújo, Alisson S.

; Garcia, José A.

; Pereira-Filho, Edenir R.

Journal of the Brazilian Chemical Society

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Dez 2020, Volume 31 Nº 12 Páginas 2439 - 2451

Resumo: En | Texto: En | PDF: En

Over the years, laser-induced breakdown spectroscopy (LIBS) has been reported in the literature as an alternative to traditional methods of analysis, becoming well established among spectroanalytical techniques. LIBS is a technique widely used for qualitative approaches; however, it is necessary considerable effort for use in quantitative analysis, mainly due to severe matrix effects. These limitations make it difficult to broaden the application of LIBS in quantitative analysis. In this sense, this review discusses recent advances in calibration strategies applied in LIBS for minimizing matrix effects and enabling determination with satisfactory accuracy and precision. Applications, advantages, and limitations of the calibration strategies, such as matrix-matching calibration (MMC), internal standardization (IS), standard addition (SA), multi-energy calibration (MEC), one-point gravimetric standard addition (OP GSA), one-point and multi-line calibration (OP MLC), slope ratio calibration (SRC), two-point calibration transfer (TP CT), single-sample calibration (SSC), multiple linear regression (MLR), principal component regression (PCR), partial least squares (PLS) and artificial neural networks (ANN) are discussed.

https://doi.org/10.21577/0103-5053.20200175 426 downloads

15.

Evaluation and Geostatistical Study of Toxicological Risk by Water Ingestion with Al, Ba, Fe and Pb in Communities Close to Industrial Areas in the Brazilian Amazon
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Oliveira, Augusto F. S. de

; Pereira, Simone F. P.

; Silva, Thiago M. e

; Rocha, Ronaldo M.

; Costa, Hemilton C. da

; Silva, Cleber S. e

; Nogueira, Daniel P.

; Santos, Davis C. dos

; Santos, Luciana P.

Journal of the Brazilian Chemical Society

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Jul 2020, Volume 31 Nº 7 Páginas 1492 - 1508

Resumo: En | Texto: En | PDF: En

This study provides a risk assessment and risk maps related to the consumption of water contaminated by Al, Ba, Fe and Pb in an industrial area in the Brazilian Amazon. A total of 120 samples of drinking water were collected from 26 locations in the municipality of Barcarena, Pará State. Multiple elements were analyzed by inductively coupled plasma optical emission spectrometry. The quantifiable elements in the samples were Al, Ba, Fe and Pb. Risk assessment was performed according to U.S. Environmental Protection Agency (USEPA) procedures. Results indicate that the highest potential risk of non-carcinogenic adverse health effects for Al was in São João Island; for Ba, Fe and Pb (hazard quotient (HQ) > 1) were in Porto da Balsa community, in the city of Barcarena and Distrito Industrial community, respectively. Maps showed that areas located near Barcarena’s industrial complex are the most affected by water contamination. Therefore, these populations are at higher risk of non-carcinogenic problems, especially children and the elderly, since the majority of the population resides in these areas. Geospatial analysis contributed to delimiting and analyzing risk-change trends in the region, expanding the scope of results to a decision-making process.

https://doi.org/10.21577/0103-5053.20200036 365 downloads

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