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au:QUEIROZ, R. A.

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Genetic parameters in melon sub-accessions from traditional agriculture
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de Amorim, Clisneide C.

; de Queiroz, Manoel A.

; Barbosa, Bárbara L. R.

; Coutinho, Milena dos S.

; Lima Neto, Izaias da S.

Revista Caatinga

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jun 2023, Volume 36 N. 2 Pages 320 - 328

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT Family farming in Brazil holds a high diversity of melon germplasm, composing an important source of alleles for breeding programs. Thus, the objective of this study was to estimate genetic parameters and select genotypes from a population of melon sub-accessions from different botanical varieties grown by family farmers, based on morphological parameters. Two experiments were conducted, one in 2019 and another in 2020, in a complete randomized block design, with three replications and five plants per plot, using 27 melon sub-accessions (generation S2) from family farmers, and a commercial variety. Nine quantitative descriptors were evaluated. Assumptions of ANOVA were tested, followed by individual and joint analyses of variance. Significant differences were found among sub-accessions for all descriptors evaluated, with heritabilities higher than 83% and significant genotype-environment interactions for 88.8% of the characteristics evaluated. Thus, genetic variability was found among sub-accessions, with predominance of genetic effects over environmental effects, denoting the possibility to obtain genetic gains by the improvement of several characteristics of agronomic interest. The sub-accessions BGMEL66.0, BGMEL111.0, and BGMEL112.0 are recommended for inclusion in breeding programs focused on obtaining good prolificacy and small fruits with high soluble solid contents. BGMEL sub-accessions (108.3 and 108.5) can generate progenies with high prolificacy, and sub-accessions of the variety momordica can be used for generation of progenies focused on shortening the crop cycle and increasing fruit size.

RESUMO A agricultura familiar possui uma grande diversidade de germoplasma de melão, constituindo-se em uma importante fonte de alelos para uso em programas de melhoramento. Assim, o presente estudo objetivou estimar parâmetros genéticos e selecionar genótipos de uma população de subacessos de melão da agricultura familiar pertencentes a diferentes variedades botânicas, com base em caracteres morfológicos. Foram realizados dois experimentos (2019 e 2020), utilizando 27 subacessos de melão (geração S2) provenientes da agricultura familiar e uma variedade comercial, em Delineamento em Blocos Casualizados (DBC) com três repetições e cinco plantas por parcela. Para avaliação foram utilizados nove descritores quantitativos. Inicialmente testou-se as pressuposições da ANOVA e, em seguida, realizou-se a análise de variância individual e a análise conjunta. Com isso, constatou-se diferença significativa entre os subacessos para todos os descritores avaliados, com herdabilidades superiores a 83% e iteração G x A significativa para 88,8% das características avaliadas. Assim, percebeu-se a existência de variabilidade genética entre os subacessos, com predominância dos efeitos genéticos sobre os ambientais, sendo possível obter ganhos genéticos para o melhoramento de várias características de interesse agronômico. Indica-se os subacessos BGMEL66.0, BGMEL111.0 e BGMEL112.0 para serem inseridos em programas de melhoramento visando obter frutos pequenos, com uma boa prolificidade e elevado teor de sólidos solúveis. Já os subacessos BGMEL (108.3 e 108.5) podem fornecer progênies de elevada prolificidade e os subacessos da variedade momordica podem ser utilizados para extração de progênies que visem diminuir o ciclo da cultura e aumentar o tamanho do fruto.

https://doi.org/10.1590/1983-21252023v36n209rc

Low-Temperature Partitioning: A Simple Screening Method for Determining Diethylene Glycol in Beer by Gas Chromatography
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Azevedo, Mariane M.

; Miranda, Liany D. L.

; Queiroz, Maria Eliana L. R. de

; Oliveira, André F. de

; Pereira, Alexandre F.

; Neves, Antônio A.

; Silva, Thaís L. R.

Journal of the Brazilian Chemical Society

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mar 2023, Volume 34 N. 3 Pages 452 - 460

Abstract: En | Text: En | PDF: En

Diethylene glycol is an extremely toxic substance to humans. Recently, cases of beer contamination in Brazil have raised awareness of the need for developing simple screening methods to evaluate this type of compound. This research developed a liquid-liquid extraction with low-temperature partitioning technique to determine diethylene glycol in beer via gas chromatography. Employing a flame-ionization detector simplifies the method, lowers its cost and therefore, it can be used as screening step to assess the possibility of contamination. A gas chromatograph coupled to a mass spectrometer would be used only for a confirmatory analysis. The optimized method was validated for the main figures of merit, and it proved to be adequate, with good values of recovery rate (94-106%), limit of detection (3.0 mg L-1), and quantification (10.0 mg L-1). Accuracy, in terms of repeatability and intermediate accuracy, showed variation coefficients lower than or equal to 20%. This method was applied to 28 samples of beers marketed in Brazil, and diethylene glycol was found above the limit of detection in three of them (10.7%). These results were confirmed by a gas chromatograph coupled to a mass spectrometer, which showed the reliability of the screening method for determining diethylene glycol in beer samples.

https://doi.org/10.21577/0103-5053.20220123

Emotional, hyperactivity and inattention problems in adolescents with immunocompromising chronic diseases during the COVID-19 pandemic
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Campos, Reinan T.

; Lindoso, Livia

; Sousa, Renan A. de

; Helito, Alberto C.

; Ihara, Bianca P.

; Strabelli, Claudia A.A.

; Paradelas, Levi M.V.

; Carneiro, Beatriz O.L.

; Cardoso, Maria Paula R.

; Souza, Jean Paulo V. de

; Freire, Marianna R. de M.

; Astley, Camilla

; Laurentino, Moisés F.

; Buscatti, Izabel M.

; Kozu, Katia

; Aikawa, Nadia E.

; Sallum, Adriana M.E.

; Ferreira, Juliana CO.

; Simon, Juliana R.

; Viana, Vivianne S.L.

; Queiroz, Ligia B.

; Gualano, Bruno

; Roschel, Hamilton

; Pereira, Rosa Maria R.

; Toma, Ricardo K.

; Watanabe, Andréia

; Grangeiro, Patricia M.

; Casella, Caio B.

; Farhat, Sylvia C.

; Polanczyk, Guilherme V.

; Campos, Lucia Maria A.

; Silva, Clovis A.

Clinics

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2023, Volume 78 elocation 100167

Abstract: En | Text: En | PDF: En

Abstract Objective: To assess factors associated with emotional changes and Hyperactivity/Inattention (HI) motivated by COVID-19 quarantine in adolescents with immunocompromising diseases. Methods: A cross-sectional study included 343 adolescents with immunocompromising diseases and 108 healthy adolescents. Online questionnaires were answered including socio-demographic data and self-rated healthcare routine during COVID-19 quarantine and validated surveys: Strengths and Difficulties Questionnaire (SDQ), Pittsburgh Sleep Quality Index (PSQI), Pediatric Quality of Life Inventory 4.0 (PedsQL4.0). Results: The frequencies of abnormal emotional SDQ scores from adolescents with chronic diseases were similar to those of healthy subjects (110/343 [32%] vs. 38/108 [35%], p = 0.548), as well as abnormal hyperactivity/inattention SDQ scores (79/343 [23%] vs. 29/108 [27%], p = 0.417). Logistic regression analysis of independent variables associated with abnormal emotional scores from adolescents with chronic diseases showed: female sex (Odds Ratio [OR = 3.76]; 95% Confidence Interval (95% CI) 2.00–7.05; p < 0.001), poor sleep quality (OR = 2.05; 95% CI 1.08–3.88; p = 0.028) and intrafamilial violence during pandemic (OR = 2.17; 95% CI 1.12–4.19; p = 0.021) as independently associated with abnormal emotional scores, whereas total PedsQL score was inversely associated with abnormal emotional scores (OR = 0.95; 95% CI 0.93–0.96; p < 0.0001). Logistic regression analysis associated with abnormal HI scores from patients evidenced that total PedsQL score (OR = 0.97; 95% CI 0.95–0.99; p = 0.010], changes in medical appointments during the pandemic (OR = 0.39; 95% CI 0.19–0.79; p = 0.021), and reliable COVID-19 information (OR = 0.35; 95% CI 0.16–0.77; p = 0.026) remained inversely associated with abnormal HI scores. Conclusion: The present study showed emotional and HI disturbances in adolescents with chronic immunosuppressive diseases during the COVID-19 pandemic. It reinforces the need to promptly implement a longitudinal program to protect the mental health of adolescents with and without chronic illnesses during future pandemics.

https://doi.org/10.1016/j.clinsp.2023.100167

Synthesis of novel glycerol-fluorinated triazole derivatives and evaluation of their phytotoxic and cytogenotoxic activities
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BARCELOS, FERNANDO F.

; ALVES, THAMMYRES A.

; GAZOLLA, POLIANA A.R.

; TEIXEIRA, RÓBSON RICARDO

; QUEIROZ, VAGNER T. DE

; PRAÇA-FONTES, MILENE M.

; MORAIS, PEDRO A.B.

; FONSECA, VICTOR R.

; ROMÃO, WANDERSON

; LACERDA JÚNIOR, VALDEMAR

; SCHERER, RODRIGO

; COSTA, ADILSON V.

Anais da Academia Brasileira de Ciências

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2023, Volume 95 N. 1 elocation e20211102

Abstract: En | Text: En | PDF: En

Abstract The control of weeds in agriculture is mainly conducted with the use of synthetic herbicides. However, environmental and human health concerns and increased resistance of weeds to existing herbicides have increased the pressure on researchers to find new active ingredients for weed control which present low toxicity to non-target organisms, are environmentally safe, and can be applied at low concentrations. It is herein described the synthesis of glycerol-fluorinated triazole derivatives and evaluation of their phytotoxic and cytogenotoxic activities. Starting from glycerol, ten fluorinated triazole derivatives were prepared in four steps. The assessment of them on Lactuca sativa revealed that they present effects on phytotoxic and cytogenotoxic parameters with different degrees of efficiency. The compounds 4a, 4b, 4d, 4e, 4i, and 4j have pre-emergent inhibition behavior, while all the investigated compounds showed post emergent effect. Mechanism of action as clastogenic, aneugenic, and epigenetic were observed in the lettuce root meristematic cells, with alterations as stick chromosome, bridge, delay, c-metaphase, and loss. It is believed that glycerol-fluorinated triazole derivatives possess a scaffold that can be explored towards the development of new chemicals for the control of weed species.

https://doi.org/10.1590/0001-3765202320211102

The psyllid fauna (Hemiptera: Psylloidea) of vegetable fields in Brazil
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Kuhn, Taciana M. de A.

; Burckhardt, Daniel

; Queiroz, Dalva L.

; Antolínez, Carlos A.

; Teresani, Gabriela R.

; Lopes, João R. S.

Revista Brasileira de Entomologia

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2023, Volume 67 N. 1 elocation e20220036

Abstract: En | Text: En | PDF: En

ABSTRACT Some psyllids transmit 'Candidatus Liberibacter solanacearum' (Lso), the causal agent of devastating plant diseases of cultivated Solanaceae and Apiaceae. The recent detection of Bactericera cockerelli and Lso in Ecuador seriously threatens these crops in South America. There, neither the role of native psyllids in the Lso epidemiology nor the psyllid fauna of vegetables are known. With the aim to identify potential vectors and risk scenarios for the spread of Lso in South America, a survey of the psyllid fauna of Solanaceae and Apiaceae crops and associated weeds was conducted in Brazil. Samples were taken at 29 localities in four states. A total of 2857 specimens were sampled, representing at least 37 species of 23 genera and seven families. The most frequent species on carrot, chilli pepper and potato were Russelliana solanicola, R. capsici and Isogonoceraia divergipennis, respectively. Immatures of R. capsici were found on chilli pepper and of R. solanicola on carrot and potato, confirming these plants as hosts. The two psyllid species have been suspected previously to transmit plant pathogens of unknown identity. Russelliana solanicola is one of the few polyphagous species. Here the species is reported for the first time from carrot. Recent collections in Rio Grande do Sul suggest that Solanum laxum represents the original host of R. capsici, which subsequently shifted to chilli pepper. Both, adaptation to agricultural crops and the possibility of ability to transmit pathogens, make the two Russelliana species dangerous potential vectors of Lso and other plant pathogens in South America.

https://doi.org/10.1590/1806-9665-rbent-2022-0036

First detection of Trypanosoma vivax in dairy cattle from the northwest region of Minas Gerais, Brazil
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Silva, J.B.

; Silva, B.M.

; Silva, L.T.

; Queiroz, W.C.C.

; Coelho, M.R.

; Silva, B.T.

; Marcusso, P.F.

; Baêta, B.A.

; Machado, R. Z.

Arquivo Brasileiro de Medicina Veterinária e Zootecnia

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2023, Volume 75 N. 1 Pages 153 - 159

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

RESUMO A tripanossomíase bovina é causada pelo protozoário Trypanosoma vivax. A transmissão biológica ocorre apenas no continente africano pela mosca Tsé-tsé, de forma mecânica por dípteros hematófagos em todos os continentes, ou pelo compartilhamento de agulhas e por práticas associadas. O estudo teve como objetivo relatar o primeiro diagnóstico parasitológico, sorológico e molecular de T. vivax em bovinos leiteiros provenientes de cinco propriedades do município de Unaí, Minas Gerais, Brasil. Cento e quinze animais selecionados por conveniência apresentavam sinais clínicos ou pertenciam a lotes de animais suspeitos. Foram detectados positivos pelos testes parasitológico (técnica de Woo), sorológico (ELISA) e molecular (LAMP). A maior prevalência global para T. vivax foi de 11,11% na propriedade A. O único sinal clínico dos animais positivos estudados foi baixa taxa de concepção. O primeiro diagnóstico de tripanossomíase no noroeste mineiro é extremamente importante, haja vista o tamanho do rebanho leiteiro da região e as possíveis perdas econômicas provocadas pela enfermidade. Ademais, faz-se necessário maior controle sanitário na região, uma vez que a transmissão no Brasil é intimamente ligada às práticas de compartilhamento de agulhas no manejo dos animais e ao parasitismo de moscas hematófagas.

https://doi.org/10.1590/1678-4162-12791

Study of Surface Modification of Niobium Caused by Nitriding and Cathodic Cage Deposition
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Macedo, Francisco R. C.

; Monção, Renan M.

; Queiroz, José C. A.

; Libório, Maxwell S.

; Costa, José A. P.

; Rossino, Luciana S.

; Danelon, Miguel R.

; Feitor, Michelle C.

; Costa, Thércio H. C.

; Sousa, Rômulo R. M.

Materials Research

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2023, Volume 26 elocation e20220613

Abstract: En | Text: En | PDF: En

In this work, plasma nitriding (PN) and cathode cage plasma deposition (CCPN) treatments were carried out with temperatures of 400 and 450 °C to evaluate the modifications caused on the surface of pure niobium samples. XRD, SEM, Vickers microhardness, and sphere-disk analyses were used to characterize the coatings’ composition, morphology, hardness, and wear resistance. The results showed that the treated samples increased hardness and wear resistance, with the sample submitted to CCPN at 450 °C presenting the best tribological behavior.

https://doi.org/10.1590/1980-5373-mr-2022-0613

Film Deposition by Duplex Treatment with Hastelloy Cage on AISI 6160 Steel
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Medeiros Filho, Mário V.

; Silva, Lucas P. da

; Libório, Maxwell S.

; Queiroz, José C. A.

; Coan, Karine S.

; Rossino, Luciana S.

; Costa, Thércio H. C.

; Sousa, Rômulo R. M.

Materials Research

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2023, Volume 26 elocation e20220625

Abstract: En | Text: En | PDF: En

AISI 6160 steel is used to manufacture cutting blades and springs due to its high tensile strength and good ductility. However, it has low mechanical strength and low wear resistance. In this work, a duplex treatment consisting of CCPD followed by PN was performed to improve the surface properties of the steel. In addition, XRD, optical microscopy, microhardness, and sphere-disk tribological analysis were used to verify the surface changes of the samples. The results showed a significant improvement in surface hardness and better wear resistance of AISI 6160 Steel submitted to Duplex treatment. The sample submitted to the CCPD treatment for 4 hours and, after nitriding at 500 °C for 2 hours, presented higher surface hardness and wear resistance than the sample only subjected to plasma deposition, characterizing the efficiency of the use of the duplex treatment adopted in the present work.

https://doi.org/10.1590/1980-5373-mr-2022-0625

DNA extracted from museum specimens of the 19th century provides a taxonomic resolution on the identity of the characid fish Psalidodon jequitinhonhae (Ostariophysi: Characiformes)
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Queiroz, Victor de

; Silva, Priscilla Caroline

; Malabarba, Maria Claudia

; Weigt, Lee

; Dergam, Jorge Abdala

; Malabarba, Luiz R.

Neotropical Ichthyology

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2023, Volume 21 N. 4 elocation e230094

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

Abstract Psalidodon jequitinhonhae was originally proposed as a variety of Tetragonopterus rutilus, based on the analysis of 14 specimens from the Jequitinhonha River, Brazil. In 1910 it was relocated in Astyanax, as A. fasciatus jequitinhonhae in Tetragonopterinae and in 2020 in Psalidodon, as Stethaprioninae member. However, in none of these revisions, P. jequitinhonhae was morphologically redescribed. A short sequence of the Cytochrome c oxidase subunit I (COI) gene obtained from one of the syntypes is compared to sequences obtained from new samples, allowing the recognition of the species and its morphological redescription based on new specimens. Both morphological and molecular data converged and corroborated P. jequitinhonhae as a valid species, occurring in the Jequitinhonha and Pardo river basins in Brazil. The syntype that provided the analyzed COI sequence is referred to as the lectotype by present designation.

Resumo Psalidodon jequitinhonhae foi proposta originalmente como uma variedade de Tetragonopterus rutilus, a partir da análise de 14 exemplares coletados no rio Jequitinhonha, Brasil. Em 1910 foi realocada em Astyanax, como A. fasciatus jequitinhonhae em Tetragonopterinae e em 2020 em Psalidodon, como membro de Stethaprioninae. Em nenhuma dessas revisões, no entanto, P. jequitinhonhae foi redescrita morfologicamente. A obtenção de uma sequência curta do gene COI a partir de um dos síntipos, comparada a sequências obtidas em novas amostras, permitiu o reconhecimento da espécie e a sua redescrição morfológica com base em novos espécimes. Tanto os dados morfológicos quanto os moleculares convergiram e corroboraram P. jequitinhonhae como uma espécie válida, ocorrendo nas bacias dos rios Jequitinhonha e Pardo no Brasil. O síntipo que forneceu a sequência de COI analisada é designado como lectótipo.

https://doi.org/10.1590/1982-0224-2023-0094

10.

Construção Automática de Múltiplas Árvores Circulatórias com Controle de Invasão de Território
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DE AQUINO, L. C. M.

; ROCHA, B. M.

; DE QUEIROZ, R. A. B.

Trends in Computational and Applied Mathematics

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2023, Volume 24 N. 2 Pages 293 - 303

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Este trabalho apresenta um algoritmo baseado no método Constrained Constructive Optimization (CCO) que possibilita gerar um modelo da estrutura geométrica de um sistema vascular com n árvores utilizando condições de contorno fisiológicas de pressão e fluxo, levando em conta a minimização do volume intravascular total durante a construção do modelo. Aplica-se o algoritmo proposto na geração de um modelo em um domínio bidimensional convexo. Os resultados mostram que o modelo criado reproduz características morfométricas encontradas em árvores vasculares reais. CCO (CCO fluxo Aplicase Aplica se convexo reais

ABSTRACT In this work we propose an algorithm based on the Constrained Constructive Optimization (CCO) method that generates a geometric model of the vascular system structure with n trees, considering fisiological conditions of flow, pressure, and taking into account the minimum intravascular volume while constructing the model. We use this algorithm to generate a geometric model of some vascular system on a convex two-dimensional perfusion domain. The results show that the model replicates morphometric features found in real vascular trees. CCO (CCO trees flow pressure twodimensional two dimensional domain

https://doi.org/10.5540/tcam.2023.024.02.00293

11.

Synthesis of Eugenol-Fluorinated Triazole Derivatives and Evaluation of Their Fungicidal Activity
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Lima, Ângela M. A.

; Paula, Wenderson T. de

; Leite, Iris C. H. L.

; Gazolla, Poliana A. R.

; Abreu, Lucas M. de

; Fonseca, Victor R.

; Romão, Wanderson

; Lacerda Jr., Valdemar

; Queiroz, Vagner T. de

; Teixeira, Róbson R.

; Costa, Adilson V.

Journal of the Brazilian Chemical Society

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oct 2022, Volume 33 N. 10 Pages 1200 - 1210

Abstract: En | Text: En | PDF: En

Eugenol (C10H12O2, 4-allyl-2-methoxyphenol) is a phenolic natural product that has several biological activities and possibilities of applications. It is herein described the synthesis of eugenol-fluorinated triazole derivatives and evaluation of their fungicidal activity. The reaction of eugenol with epichlorohydrin resulted in the preparation of (±)-2-((4-allyl-2-methoxyphenoxy)methyl)oxirane (1) in 88% yield. The azidolysis of 1 with sodium azide gave the azido-alcohol (±)-1-(4-allyl-2-methoxyphenoxy)-3-azidopropan-2-ol (2) in 94% yield. The CuAAc reaction between compound 2 and different terminal alkynes afforded a series of eleven derivatives (3a 3k) within 48-80% yield. All the synthesized compounds were characterized by infrared (IR) and nuclear magnetic resonance (1H and 13C) spectroscopies and high-resolution mass spectrometry. The in vitro inhibitory activity of the compounds on the mycelial growth of a strain of Colletotrichum sp., that causes anthracnose disease on papaya fruits, was evaluated. The best result was observed for compound 1-(4-allyl-2-methoxyphenoxy)-3-(4-(2-fluorophenyl)-1H-1,2,3-triazol-1-yl)propan-2-ol (3d) that showed a mean growth-inhibition zone of 5.10 mm in a well-diffusion assay, and may serve as a template for additional structural modifications, aiming for more potent fungicidal activity.

https://doi.org/10.21577/0103-5053.20220040

12.

Comparison of Bioelectrical Impedance Vector Analysis (BIVA) to 7-point Subjective Global Assessment for the diagnosis of malnutrition
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Sugizaki, Clara S. A.

; Queiroz, Nayara P.

; Silva, Débora M.

; Freitas, Ana T. V. S.

; Costa, Nara A.

; Peixoto, Maria R. G.

Brazilian Journal of Nephrology

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jun 2022, Volume 44 N. 2 Pages 171 - 178

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Introdução: Análise vetorial de impedância bioelétrica (BIVA) é uma estratégia não invasiva e de baixo custo. Os métodos usados para avaliar desnutrição em pacientes em HD ainda são um desafio. O objetivo do presente estudo foi comparar BIVA com Avaliação Subjetiva Global de 7 pontos (ASG de 7 pontos) para identificar desnutrição. Também investigamos sensibilidade e especificidade do ponto de corte proposto anteriormente para parâmetros de BIVA. Métodos: Foram incluídos pacientes de ambos os sexos, acima de 20 anos, em HD. Foram avaliados parâmetros antropométricos, dados laboratoriais e análise de impedância bioelétrica (BIA). Valores de resistência (R) e reatância (Xc) obtidos por BIA de mono-frequência foram normalizados para altura corporal (H) gerando um gráfico do vetor de bioimpedância com a ajuda do software BIVA. Foi realizada uma análise da área sob a curva ROC (AUC). Resultados: Entre 104 pacientes incluídos, a idade média foi 51,70 (±15,10) anos, e 52% eram homens. BIVA demonstrou sensibilidade de 35% para diagnosticar desnutrição. A especificidade da BIVA para identificar pacientes bem nutridos foi 85,7%. A precisão diagnóstica entre BIVA e ASG de 7 pontos foi AUC=0,604; IC95%: 0,490-0,726, superior aos valores de corte estabelecidos anteriormente (AUC=0,514; IC95%: 0,369-0,631). Elipses de confiança de 95% não se sobrepuseram (p<0,05). Conclusão: Nosso estudo mostrou baixa precisão da BIVA para diagnóstico de desnutrição usando ASG-7 pontos como padrão de referência. Entretanto, é um método complementar para avaliar estado nutricional, pois fornece dados sobre celularidade e hidratação, aspectos importantes para a população em HD.

Abstract Introduction: Bioelectrical impedance vector analysis (BIVA) is a non-invasive and low-cost strategy. The methods used to assess malnutrition in patients undergoing HD are still a challenge. The aim of the present study was to compare BIVA to 7-Point Subjective Global Assessment (7-point SGA) to identify malnutrition. We also investigated the sensitivity and specificity of the previously proposed cutoffs point for BIVA parameters. Methods: Patients of both sexes, over 20 years of age, on HD treatment were included. Anthropometric parameters, laboratory data, and bioelectrical impedance analysis (BIA) were evaluated. Values of resistance (R) and reactance (Xc) obtained by mono-frequency BIA were normalized to body height (H) to generate a graph of the bioimpedance vector with the BIVA software. The analysis of the area under the receiver operating curve ROC (AUC) was performed. Results: Among the included 104 patients, the mean age was 51.70 (±15.10) years, and 52% were male. The BIVA had a sensitivity of 35% for diagnosing malnutrition. The specificity of BIVA for identifying the well-nourished patients was 85.7%. The diagnostic accuracy between the BIVA and 7-point SGA was AUC=0.604; 95%CI 0.490-0.726, higher than the previously established cutoff values (AUC=0.514; 95%CI: 0.369-0.631). The 95% confidence ellipses did not overlap (p<0.05). Conclusion: Our study showed low accuracy of BIVA for diagnosing malnutrition using a 7-point SGA as a reference standard. However, it is a complementary method for assessing nutritional status as it provides data on cellularity and hydration, which are important aspects for the HD population.

https://doi.org/10.1590/2175-8239-jbn-2021-0099

13.

Lagged response of Tropical Atlantic Ocean to cold and fresh water pulse from Antarctic sea ice melting
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TORRES, ANA LAURA R.

; PARISE, CLAUDIA K.

; PEZZI, LUCIANO P.

; QUEIROZ, MICHELLY G. DOS SANTOS

; MACHADO, ADILSON M.B.

; CERVEIRA, GABRIEL S.

; CORREIA, GUSTAVO S.

; BARBOSA, WESLEY L.

; LIMA, LEONARDO G. DE

; SUTIL, UESLEI A.

Anais da Academia Brasileira de Ciências

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2022, Volume 94 Suppl. 1 elocation e20210800

Abstract: En | Text: En | PDF: En

Abstract The formation of dense water masses at polar regions has been largely influenced by climate changes arising from global warming. In this context, based on ensemble simulations with a coupled model we evaluate the meridional shift of a climate signal (i.e., a cold and fresh water input pulse generated from melting of positive Antarctic sea ice (ASI) extremes) towards the Tropical Atlantic Ocean (TAO). This oceanic signal propagated from Southern Ocean towards the equator through the upper layers due to an increase in its buoyance. Its northward shift has given by the Subantarctic Mode Water (SAMW) and Antarctic Intermediate Water (AAIW) flows, that inject cold and fresh mode/intermediate waters from into subtropical basin. The signal has reached low latitudes through the equatorial upwelling and spreads out southwards, through the upper branch of southern subtropical gyre. We concluded that 10 years of coupled simulations was enough time to propagate the climate signal generated by ASI positive extremes melting, which reached TOA around 2 year later. The oceanic connection between Southern Ocean and TAO is indeed established within the timescale analyzed in the study (10 years). Nonetheless, the period needed to completely dissipate the disturbance generated from ASI seems to be longer.

https://doi.org/10.1590/0001-3765202220210800

14.

Concordância entre plantas regenerantes, formigas e outros artrópodes na Mata Atlântica: a importância da identidade das árvores no dossel
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Casimiro, Mariana S.

; Filardi, R. A. E.

; Sansevero, J. B.B.

; Santangelo, J. M.

; Feitosa, R. M.

; Queiroz, Jarbas M.

Iheringia. Série Zoologia

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2022, Volume 112 elocation e2022008

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO O monitoramento das práticas de restauração é um processo caro, mas essencial para verificar o seu sucesso. Uma forma de reduzir os custos amostrais é por meio da utilização de indicadores de biodiversidade, termo utilizado para um grupo funcional ou taxonômico que é concordante com outro grupo. O objetivo deste trabalho foi avaliar a concordância entre a riqueza e a composição de plantas regenerantes, formigas e outros artrópodes sob o dossel de quatro espécies arbóreas em uma área de restauração na Mata Atlântica, Brasil, bem como determinar a relação das comunidades biológicas com parâmetros ambientais e espaciais. Foi encontrado que as variáveis ambientais, muitas vezes ligadas a identidade da árvore, são preponderantes para determinar a relação entre formigas, outros artrópodes e plantas regenerantes. Além disso, as formigas demonstraram ser indicadores fracos da diversidade e composição de plantas regenerantes e outros artrópodes e essa relação não foi guiada pelas variáveis ambientais e espaciais. Assim, os resultados aqui encontrados recomendam cautela ao utilizar formigas como indicadores de biodiversidade de plantas e outros artrópodes em programas de monitoramento na Mata Atlântica.

ABSTRACT Monitoring restoration practices is an expensive process, but essential to verifying their success. One way to reduce sampling costs is using biodiversity indicators, a term used for a functional or taxonomic group that is in agreement with another group. The objective of this work was to evaluate the agreement between the richness and composition of regenerating plants, ants and other arthropods under the canopy of four tree species in a restoration area in the Atlantic Forest, Brazil, as well as to determine the relationship of biological communities with parameters environmental and spatial. It was found that environmental variables, often linked to the tree's identity, are preponderant in determining the relationship between ants, other arthropods and regenerating plants. In addition, ants proved to be weak indicators of regenerating plants and other arthropods diversity and composition and this relationship was not guided by environmental and spatial variables. Thus, the results found here recommend caution when using ants as indicators of plant biodiversity and other arthropods in monitoring programs in the Atlantic Forest.

https://doi.org/10.1590/1678-4766e2022008

15.

Sistemas do Tipo Difusão-Reação e Preservação de Pontos Singulares
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JUDICE, S. F. P. P.

; SANTOS, Í. M. F.

; KOSCHECK, N.

; LOULA, A. D.

; GIRALDI, G. A.

; QUEIROZ, R. A. B. DE

Trends in Computational and Applied Mathematics

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aug 2021, Volume 22 N. 2 Pages 241 - 263

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Motivados por aplicações recentes em computação gráfica, este trabalho apresenta um estudo teórico e computacional de sistemas de difusão-reação baseados no Gradient Vector Flow (GVF), com foco no comportamento do GVF em relação às singularidades do campo inicial. O estudo teórico parte de uma análise local, independente de condições de fronteira. Em seguida, supõe-se condição de fronteira no infinito e usa-se análise de Fourier para estabelecer condições suficientes para preservação do ponto singular. Finalmente, supõe-se um domínio compacto, com geometria retangular, e analisa-se a preservação de um ponto singular em relação à condição de fronteira usando um método de solução de equações diferenciais parciais (EDPs) baseado em wavelets de Haar. Desenvolvemos também uma implementação de um método direto para a equação estacionária do GVF baseado em diferenças finitas (DF) para comparar com a solução tradicional do Euler explícito, no que diz respeito a singularidade. É discutida a influência da vorticidade no problema de interesse usando a função de linhas de corrente e equação de Helmholtz. Nos experimentos computacionais, consideramos duas condições de fronteira, dois tipos de singularidades e os três métodos numéricos (Euler explícito, diferenças finitas para a equação estacionária, e wavelets) para verificar os resultados teóricos obtidos.

ABSTRACT Motivated by recent computer graphics applications, this work presents a theoretical and computational study of diffusion-reaction systems based on Gradient Vector Flow (GVF), focusing on the behavior of GVF concerning the singularities of the initial vector field. The theoretical study starts from a local analysis, regardless of boundary conditions. Then, the boundary condition at infinity is assumed, and Fourier analysis is used to establish sufficient conditions for preserving the singular point. Finally, a compact domain with rectangular geometry is assumed. The preservation of a singular point concerning the boundary condition is analyzed using a method for solving partial differential equations (PDEs) based on Haar wavelets. We have also developed an implementation of a direct method for the GVF stationary equation based on finite differences (DF) to compare with the traditional explicit Euler solution with respect to singularity. The influence of vorticity on the problem of interest is discussed using the streamlines function and the Helmholtz equation. In the computational experiments, we consider two boundary conditions, two types of singularities, and the three numerical methods (explicit Euler, finite differences for the stationary equation, and wavelets) to verify the theoretical results obtained.

https://doi.org/10.5540/tcam.2021.022.02.00241 1183 downloads

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