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Composição corporal versus resultados antropométricos dos indígenas Khisêdjê do Xingu - MT/Brasil MTBrasil MT Brasil
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Mazzucchetti, Lalucha

; Galvão, Patrícia Paiva de Oliveira

; Tsutsui, Mário Luiz da Silva

; Santos, Kennedy Maia dos

; Rodrigues, Douglas Antônio

; Rabelo, Vânia Fernandes

; Gimeno, Suely Godoy Agostinho

Ciência & Saúde Coletiva

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2024, Volume 29 N. 12 elocation e05862024

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

Resumo O estudo objetivou avaliar a composição corporal dos indígenas Khisêdjê residentes no Território Indígena do Xingu e compará-la com os resultados obtidos pela antropometria. Foram incluídos 179 indivíduos com idade ≥ 20 anos. O estado nutricional foi classificado segundo os pontos de corte propostos pela Organização Mundial da Saúde (1995). A composição corporal foi identificada por meio das medidas derivadas diretamente do aparelho de impedância bioelétrica tetrapolar (resistência - R, reactância - Xc e ângulo de fase -AF). Os dados foram analisados por meio do teste t de Student, teste qui-quadrado, coeficiente de Pearson e análise de variância. Dos avaliados, 57,0% foram homens e a idade média foi de 37,5 anos. Foi apresentado 48,0% de excesso de peso (índice de massa corpórea - IMC ≥ 25,0 kg/m2). Identificou-se correlação positiva entre o IMC com as medidas do perímetro da cintura e do braço e AF, e correlação inversa com as medidas de R e Xc. As médias das medidas de R e Xc reduziram com o aumento do IMC; em contrapartida, as médias do AF cresceram com o aumento do peso. Os resultados sugerem que a presença de excesso de peso entre os indígenas Khisêdjê se associou a maior quantidade de massa muscular. comparála compará la antropometria 17 2 anos 1995. 1995 . (1995) resistência AF. -AF) Student quiquadrado, quiquadrado qui quadrado, quadrado qui-quadrado variância avaliados 570 57 0 57,0 375 37 5 37, 480 48 48,0 índice 250 25 25, kg/m2. kgm2 kgm kg/m2 kg m2 m kg/m2) Identificouse Identificou contrapartida muscular 1 199 (1995 -AF 57, 3 4 48, kg/m 19 (199 (19 (1 (

Abstract This study aimed to evaluate the body composition of the Khisêdjê, an Indigenous people residing in the Xingu Indigenous Territory, and compare it to the results obtained by anthropometry. One hundred seventy-nine individuals aged above 20 of both genders were included. The nutritional status was classified per the cutoff proposed by the WHO (1995). The body composition was identified using measures derived directly from a bioelectrical impedance device (resistance - R, reactance - Xc, and phase angle - PA). Data were analyzed using the Student t-test, chi-square, Pearson correlation, and analysis of variance, and 57% of the sample was male. The mean age of the population was 37.5 years, and 48% of subjects had some overweight level (BMI ≥ 25,0 kg/m2). We identified a positive correlation between BMI with waist (WC) and arm (AC) circumference, and PA measurements, and an inverse correlation between BMI and R and Xc measurements. R and Xc mean values decreased with increasing BMI. In contrast, mean PA increased with greater weight. The results suggest that being overweight among the Khisêdjê Indigenous people was associated with higher muscle mass amounts. Territory anthropometry seventynine seventy nine 2 included 1995. 1995 . (1995) resistance PA. PA) ttest, ttest t test, test t-test chisquare, chisquare chi square, square chi-square variance 57 male 375 37 5 37. years 48 250 25 0 25, kg/m2. kgm2 kgm kg/m2 kg m2 m kg/m2) WC (WC AC (AC circumference measurements contrast weight amounts 199 (1995 3 4 kg/m 19 (199 1 (19 (1 (

Resumen Este estudio tuvo como objetivo evaluar la composición corporal de los indígenas Khisêdjê que viven en el Territorio Indígena Xingu y compararla con los resultados obtenidos por antropometría. Se incluyeron 179 individuos con edad ≥ 20 años. El estado nutricional se clasificado según los puntos de corte propuestos por la Organización Mundial de la Salud (1995). La composición corporal se identificó mediante mediciones derivadas directamente del aparato de impedancia bioeléctrica tetrapolar (resistencia - R, reactancia - Xc y ángulo de fase - AF). Los datos se analizaron mediante la prueba t de Student, la prueba chi-cuadrado, el coeficiente de Pearson y el análisis de la varianza. El 57,0% de los evaluados eran hombres y la edad media era de 37,5 años. El 48,0% tenía sobrepeso (índice de masa corporal - IMC ≥ 25,0 kg/m2).Se identificó una correlación positiva entre el IMC y las mediciones del perímetro de la cintura y el brazo y la AF, y una correlación inversa con las mediciones de R y Xc. Las mediciones medias de R y Xc disminuyeron con el aumento del IMC; por otro lado, las medias de AF aumentaron con el aumento del peso. Los resultados sugieren que el sobrepeso entre los indígenas Khisêdjê estaba asociado a una mayor masa muscular. antropometría 17 2 años 1995. 1995 . (1995) resistencia AF. AF) Student chicuadrado, chicuadrado chi cuadrado, cuadrado chi-cuadrado varianza 570 57 0 57,0 375 37 5 37, 480 48 48,0 índice 250 25 25, kg/m2.Se kgm2Se kgmSe kg/m2 .Se kg m2 m lado peso muscular 1 199 (1995 57, 3 4 48, kgm kgm2 kg/m 19 (199 (19 (1 (

https://doi.org/10.1590/1413-812320242912.05862024

Catálogo de dados para descoberta e recuperação de dados abertos: uma solução baseada em APIs governamentais do Brasil abertos
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Silva, Patrícia Nascimento

; Silva, Gabriel Vieira Pereira da

; Fernandes Filho, Douglas Rodrigues

Transinformação

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2024, Volume 36 elocation e2410694

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

Resumo Com a evolução tecnológica e o surgimento de novos suportes, ambientes e ferramentas, as fontes de informação sofreram alterações nas formas de acesso e comunicação, sendo automatizadas por Application Programming Interface que permitem a representação, organização e recuperação de dados para diversos domínios. O catálogo, instrumento longínquo de organização e preservação em acervos, também sofreu modificações contemplando uma visão ampliada dos dados e metadados nas organizações. Unir esses recursos para descoberta e recuperação em fontes volumosas, valiosas, pouco padronizadas e dispersas como os dados abertos publicados pelos governos é uma solução plausível e necessária. O objetivo deste estudo foi modelar um catálogo de dados para as Application Programming Interfaces de dados governamentais abertos do Brasil. Caracterizada como descritiva e aplicada, a pesquisa foi dividida em três etapas, uma para cada objetivo específico, executadas entre 2023 e 2024. Na primeira etapa, o mapeamento das Application Programming Interfaces, realizado em estudo anterior, foi utilizado para estudo e identificação dos domínios, fontes de informação e ativos. Na segunda etapa foram definidos metadados para representação das Application Programming Interfaces, que considerou componentes padrões da arquitetura, o padrão e-PMG e um vocabulário controlado do governo para classificação. A terceira etapa consistiu na modelagem do catálogo de dados, por meio de um banco de dados relacional, com oito tabelas validadas com dados reais. O catálogo de dados permitiu descobrir metadados para recuperar conjuntos de dados abertos, fomentando o reúso e a interoperabilidade com outras aplicações, além disso, a solução é reprodutível para outros serviços e domínios de dados. suportes ferramentas comunicação acervos organizações volumosas valiosas necessária Brasil aplicada etapas específico 202 2024 anterior ativos arquitetura ePMG PMG classificação relacional reais aplicações disso 20 2

Abstract With technological evolution and the emergence of new media, environments and tools, information sources have under gone changes in the ways they are accessed and communicated, being automated by Application Programming Interfaces that allow data to be represented, organized and retrieved for various domains. The catalog, a long-standing tool for organizing and preserving collections, hás also under gone changes, taking on board na expanded vision of data and metadata in organizations. Combining these resources for Discovery and retrieval in voluminous, valuable, poorly standardizedanddispersedsourcessuch as open data published by governments is a plausible and necessary solution. The aim of this study was to model a data catalog for open government data Application Programming Interfaces of Brazil. Characterized as descriptive and applied, there search was divided in to three stages, one for each specific objective, carried out between 2023 and 2024. In the first stage, the mapping of Application Programming Interfaces, carried out in a previous study, was used to study and identify domains, information sources and assets. In the second stage, metadata was defined to representthe Application Programming Interfaces, takingin to account standard components of the architecture, the e-PMG standard and a controlled government vocabulary for classification. The third stage consisted of modeling the data catalog using a relational database with eight tables validated with real data. The data catalog made it possible to discover metadata to retrieve open data sets, encouraging reuse and interoperability with other applications, and the solutionis reproducible for other services and data domains. media tools communicated represented domains longstanding long standing collections organizations voluminous valuable solution Brazil applied stages objective 202 2024 assets architecture ePMG e PMG classification sets applications 20 2

https://doi.org/10.1590/2318-0889202436e2410694

As briófitas da Reserva Particular do Patrimônio Natural Parque das Neblinas, Estado de São Paulo, Brasil: IV Workshop de Briófitas do Brasil Neblinas Paulo
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Gonçalves, Mateus Tomás Anselmo

; Lima, Jéssica Soares de

; Canestraro, Bianca Kalinowski

; Castro, Camila de Oliveira

; Gissi, Danilo Soares

; Oliveira, Douglas Santos

; Moraes, Gabriella Veiga de

; Silva, Gledson Julio da

; Santos, Milena Evangelista dos

; Peres-Silva, Raphaela

; Peralta, Denilson Fernandes

Hoehnea

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2024, Volume 51 elocation e512024

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

RESUMO (As briófitas da Reserva Particular do Patrimônio Natural Parque das Neblinas, Estado de São Paulo, Brasil: IV Workshop de Briófitas do Brasil). Em novembro de 2022, ocorreu o IV Workshop de Briófitas Brasileiras, celebrando 200 anos de estudos de briófitas no Brasil. A data comemora a publicação de Raddi em 1822 e o mês de nascimento de Aloysio Sehnem, o primeiro brasileiro a estudar briófitas. Dezessete entusiastas de briófitas participaram das atividades práticas utilizando amostras do herbário SP e coleta no Parque das Neblinas, situado entre Mogi das Cruzes e Bertioga - SP. O parque abrange uma área com Floresta Ombrófila e plantações de Eucalyptus. Foram encontradas 381 espécies de briófitas, sendo Lejeuneaceae a família mais diversa, com 83 espécies, e Pilotrichaceae com 20 espécies. Vinte e quatro espécies são novos registros para o Estado de São Paulo. 38% são exclusivas da Mata Atlântica, 12% são endêmicas do Brasil. Esses resultados destacam a importância do Parque das Neblinas para a conservação e futuros estudos de briófitas. As Paulo Brasil . Brasil) 2022 Brasileiras 182 Sehnem Eucalyptus 38 diversa 8 2 Atlântica 12 202 18 3 1

ABSTRACT (The bryophytes of the Reserva Particular do Patrimônio Natural Parque das Neblinas, State of São Paulo, Brazil: IV Bryophyte Workshop of Brazil). In November 2022, the IV Workshop of Brazilian Bryophytes took place, celebrating 200 years of bryophyte studies in Brazil. The date commemorates Raddi’s publication in 1822 and the birth month of Aloysio Sehnem, the first Brazilian to study bryophytes. Seventeen bryophyte enthusiasts participated in practical activities using samples from the SP herbarium and collecting in the Parque das Neblinas, located between Mogi das Cruzes and Bertioga, São Paulo State, Brazil. The park covers an area with Ombrophilous Forest and Eucalyptus plantations. 381 species of bryophytes were found, with Lejeuneaceae being the most diverse family, with 83 species, and Pilotrichaceae with 20 species. Twenty-four species are new records for the State of São Paulo. 38% are exclusive to the Atlantic Forest, and 12% are endemic to Brazil. These results highlight the importance of Parque das Neblinas for the conservation and future studies of bryophytes. Brazil . Brazil) 2022 place Raddis Raddi s 182 Sehnem Bertioga plantations 38 found family 8 2 Twentyfour Twenty four 12 202 18 3 1

https://doi.org/10.1590/2236-8906e512024

Composição corporal versus resultados antropométricos dos indígenas Khisêdjê do Xingu - MT/Brasil
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Mazzucchetti, Lalucha

; Galvão, Patrícia Paiva de Oliveira

; Tsutsui, Mário Luiz da Silva

; Santos, Kennedy Maia dos

; Rodrigues, Douglas Antônio

; Rabelo, Vânia Fernandes

; Gimeno, Suely Godoy Agostinho

Ciência & Saúde Coletiva

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2024, Volume 29 N. 12 elocation e05862024

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

https://doi.org/10.1590/1413-812320242912.05862024

Impact of vertical positioning on lung aeration among mechanically ventilated intensive care unit patients: a randomized crossover clinical trial patients
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Neves, Douglas

; Marques Filho, Paulo Ricardo

; Townsend, Raquel da Silva

; Rodrigues, Cristiano dos Santos

; Tagliari, Luciana

; Madeira, Laura Cordeiro

; Mattioni, Mariana Fensterseifer

; Camillis, Márcio Luiz Ferreira de

; Leães, Clarissa Garcia Soares

; Andrade, Juliana Mara Stormovski de

; Robinson, Caroline Cabral

; Sganzerla, Daniel

; Drehmer, Laura

; Costa, Denis Fernandes Madruga da

; Machado, André Sant’Ana

; Rosa, Regis Goulart

; Lago, Pedro Dal

Critical Care Science

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dec 2023, Volume 35 N. 4 Pages 367 - 376

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

RESUMO Objetivo: Avaliar o impacto de diferentes posicionamentos verticais na aeração pulmonar em pacientes em ventilação mecânica invasiva. Métodos: Trata-se de ensaio clínico aberto, randomizado e transversal, realizado entre janeiro e julho de 2020. Adultos em ventilação mecânica invasiva por mais de 24 horas e menos de 7 dias com estabilidade hemodinâmica, respiratória e neurológica foram distribuídos aleatoriamente em uma proporção de 1:1 à postura sentada seguida da condição de ortostatismo passivo ou o ortostatismo passivo seguido de postura sentada. O desfecho primário foi a aeração pulmonar avaliada pelo lung ultrasound score. O escore varia de zero (melhor) a 36 (pior). Resultados: Foram selecionados 186 indivíduos; destes, 19 foram incluídos (57,8% do sexo masculino; média idade de 73,2 anos). Todos os participantes foram selecionados para receber pelo menos um protocolo de verticalização. O ortostatismo passivo resultou em escores médios de aeração pulmonar por ultrassonografia que não diferiram significativamente da postura sentada (11,0 versus 13,7; diferença média, -2,7; IC95% -6,1 a 0,71; p = 0,11). Ocorreram eventos adversos em três indivíduos no grupo ortostatismo passivo e em um no grupo postura sentada (p = 0,99). Conclusão: Esta análise não encontrou diferenças significativas na aeração pulmonar entre os grupos ortostatismo passivo e postura sentada. É factível conduzir um estudo clínico transversal randomizado para avaliar o impacto do posicionamento vertical na aeração pulmonar em pacientes em ventilação mecânica invasiva. Infelizmente, o estudo foi interrompido devido à necessidade de tratar pacientes com COVID-19. Registro ClinicalTrials.gov: NCT04176445 Objetivo Métodos Tratase Trata se aberto 2020 2 hemodinâmica 11 1 1: score melhor (melhor 3 pior. pior . (pior) Resultados 18 destes 57,8% 578 57 8 (57,8 masculino 732 73 73, anos. anos anos) verticalização 11,0 110 0 (11, 13,7 137 13 2,7 27 -2,7 IC95 IC 6,1 61 6 -6, 0,71 071 71 0,11. 011 0,11 0,11) 0,99. 099 0,99 99 0,99) Conclusão Infelizmente COVID19. COVID19 COVID 19. COVID-19 ClinicalTrials.gov ClinicalTrialsgov ClinicalTrials gov NCT NCT0417644 202 (pior 57,8 5 (57, 11, (11 13, 2, -2, IC9 6, -6 0,7 07 01 0,1 09 0,9 9 COVID1 COVID-1 NCT041764 20 57, (57 (1 -2 - 0, COVID- NCT04176 (5 ( NCT0417 NCT041 NCT04 NCT0

ABSTRACT Objective: To assess the impact of different vertical positions on lung aeration in patients receiving invasive mechanical ventilation. Methods: An open-label randomized crossover clinical trial was conducted between January and July 2020. Adults receiving invasive mechanical ventilation for > 24 hours and < 7 days with hemodynamic, respiratory and neurological stability were randomly assigned at a 1:1 ratio to the sitting position followed by passive orthostasis condition or the passive orthostasis followed by the sitting position condition. The primary outcome was lung aeration assessed using the lung ultrasound score (score ranges from 0 [better] to 36 [worse]). Results: A total of 186 subjects were screened; of these subjects, 19 were enrolled (57.8% male; mean age, 73.2 years). All participants were assigned to receive at least one verticalization protocol. Passive orthostasis resulted in mean lung ultrasound scores that did not differ significantly from the sitting position (11.0 versus 13.7; mean difference, -2.7; [95%CI -6.1 to 0.71; p = 0.11). Adverse events occurred in three subjects in the passive orthostasis group and in one in the sitting position group (p = 0.99). Conclusion: This analysis did not find significant differences in lung aeration between the sitting and passive orthostasis groups. A randomized crossover clinical trial assessing the impact of vertical positioning on lung aeration in patients receiving invasive mechanical ventilation is feasible. Unfortunately, the study was interrupted due to the need to treat COVID-19 patients. ClinicalTrials.gov registry: NCT04176445 Objective Methods openlabel open label 2020 2 hemodynamic 11 1 1: better [better 3 worse. worse . [worse]) Results 18 screened 57.8% 578 57 8 (57.8 male age 732 73 73. years. years years) protocol 11.0 110 (11. 13.7 137 13 difference 2.7 27 -2.7 95%CI 95CI CI 95 6.1 61 6 -6. 0.71 071 71 0.11. 011 0.11 0.11) 0.99. 099 0.99 99 0.99) Conclusion groups feasible Unfortunately COVID19 COVID COVID-1 ClinicalTrialsgov ClinicalTrials gov registry NCT NCT0417644 202 [worse] 57.8 5 (57. 11. (11 13. 2. -2. 9 6. -6 0.7 07 01 0.1 09 0.9 COVID1 COVID- NCT041764 20 [worse 57. (57 (1 -2 - 0. NCT04176 (5 ( NCT0417 NCT041 NCT04 NCT0

https://doi.org/10.5935/2965-2774.20230069-en

Effect of immunonutrition on serum levels of C-reactive protein and lymphocytes in patients with COVID-19: a randomized, controlled, double-blind clinical trial
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Pimentel, Rodrigo Fernandes Weyll

; Silva, Arthur Pinto

; Santana, Amália Ivine Costa

; Souza e Silva, Douglas de

; Ramos, Mariângela de Souza

; de Souza, Márcio Costa

; Suen, Vivian Marques Miguel

; Maduro, Isolda Padro de Negreiros Nogueira

; Filho, Durval Ribas

; Júnior, Argemiro D'Oliveira

; da Silva, Dandara Almeida Reis

; Coelho, Julita Maria Freitas

; Gomes, Antonio Marcos Tosoli

; Machado, Paulo Roberto Lima

; das Merces, Magno Conceição

Nutrición Hospitalaria

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feb 2022, Volume 39 N. 1 Pages 20 - 26

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract Introduction: patients with COVID-19 undergo changes in leukocyte count, respiratory disorders, and an increase in inflammatory substances. To improve the inflammatory condition, some nutrients can be used, including arginine, omega-3 fatty acids and nucleotides. This study aims to evaluate how oral immunonutrient supplements affects serum C-reactive protein (CRP) levels and lymphocyte count in patients with COVID-19. Methods: in this double-blind clinical trial, we randomized 43 adult patients with COVID-19 to receive a standard high-protein normocaloric supplement (control) or an immunonutrient-enriched supplement (experiment) for 7 days. The primary outcome was to evaluate changes in total lymphocyte count and serum level of CRP. The assessment of risk and nutritional status of these patients was also performed. Results: forty-three patients with mean age of 41.5 (± 1.8) years were followed up, 39.5 % of them women. The mean body mass index was 27.6 (± 0.8) kg/m² and 58.1 % had low nutritional risk. In the experiment group, there was a CRP reduction of 23.6 (± 7.5) mg/L, while in the control branch the decrease was 14.8 (± 12.1) mg/L (p = 0.002). There was an increase in lymphocytes in the experiment group (+367.5 ± 401.8 cells/mm³) and a reduction in the control group (-282.8 ± 327.8 cells/mm³), although there was no statistical significance (p = 0.369). Relative risk (RR) of treatment in reducing CRP by 30 % or more was 4.45 (p < 0.001; 95 % CI, 1.79-11.07). RR in increasing lymphocyte count by 30 % or more was 1.28 (p = 0.327; 95 % CI, 0.67-2.45). Conclusion: we conclude that immunonutrient supplements seem to reduce CRP levels more than standard high-protein normocaloric supplements.

Resumen Introducción: los pacientes con COVID-19 sufren cambios en el recuento de leucocitos, trastornos respiratorios y aumento de sustancias inflamatorias. Para mejorar la condición inflamatoria se pueden usar algunos nutrientes, como la arginina, los ácidos grasos omega-3 y los nucleótidos. Este estudio tiene como objetivo evaluar cómo los suplementos de inmunonutrientes orales afectan a los niveles séricos de proteína C-reactiva (PCR) y al recuento de linfocitos en pacientes con COVID-19. Métodos: en este ensayo clínico doble ciego, aleatorizamos a 43 pacientes adultos con COVID-19 para recibir un suplemento normocalórico estándar alto en proteínas (control) o un suplemento enriquecido con inmunonutrientes (experimento) durante 7 días. El resultado primario fue evaluar los cambios en el recuento total de linfocitos y el nivel sérico de PCR. También se realizó la evaluación del riesgo y el estado nutricional de estos pacientes. Resultados: cuarenta y tres pacientes con edad media de 41,5 (± 1,8) años fueron seguidos, el 39,5 % de ellos mujeres. El índice de masa corporal medio fue de 27,6 (± 0,8) kg/m² y el 58,1 % tenían bajo riesgo nutricional. En el grupo experimental hubo una reducción de la PCR de 23,6 (± 7,5) mg/L, mientras que en la rama de control la disminución fue de 14,8 (± 12,1) mg/L (p = 0,002). Hubo un aumento de linfocitos en el grupo experimental (+367,5 ± 401,8 células/mm³) y una reducción en el grupo de control (-282,8 ± 327,8 células/mm³), aunque no hubo significación estadística (p = 0,369). El riesgo relativo (RR) del tratamiento para reducir la PCR en un 30 % o más fue de 4,45 (p < 0,001; IC 95 %: 1,79-11,07). El RR en el aumento del recuento de linfocitos en un 30 % o más fue de 1,28 (p = 0,327; IC 95 %: 0,67-2,45). Conclusión: se concluye que los suplementos de inmunonutrientes parecen reducir los niveles de PCR más que los suplementos normocalóricos estándar altos en proteína.

https://doi.org/10.20960/nh.03847

SARS-CoV-2 in saliva, viremia and seroprevalence for COVID-19 surveillance at a single hematopoietic stem cell transplantation center: a prospective cohort study
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Mobile, Rafael Zancan

; Warnawin, Stephanie von Stein Cubas

; Kojo, Teresinha Keiko

; Rodrigues, Jéssica Alline Pereira

; Cavilha, Adriana Mendes de Quadros

; Zerbinati, Rodrigo Melim

; Adamoski, Douglas

; Oliveira, Jaqueline Carvalho de

; Conzentino, Marcelo Santos

; Huergo, Luciano Fernandes

; Gradia, Daniela Fiori

; Braz-Silva, Paulo Henrique

; Schussel, Juliana Lucena

Revista do Instituto de Medicina Tropical de São Paulo

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2022, Volume 64 elocation e39

Abstract: En | Text: En | PDF: En

ABSTRACT This prospective cohort study aims to analyze the surveillance of COVID-19 at a single hematopoietic stem cell transplantation (HSCT) center in Brazil, in 29 patients undergoing allogeneic HSCT and 57 healthcare workers (nurses and dentists), through viral shedding of SARS-CoV-2 in saliva and plasma and seroprevalence of anti-SARS-CoV-2 IgG. In addition, we report two cases with prolonged persistent detection of SARS-CoV-2 without seroconversion. The sample collection was performed seven times for patients and five times for healthcare workers. Only two patients tested positive for SARS-CoV-2 in their saliva and plasma samples (6.9%) without seroconversion. All healthcare workers were asymptomatic and none tested positive. Two patients (6.9%) and four nurses (8%) had positive serology. No dentists had positive viral detection or positive serology. Our results reflect a low prevalence of positive RT-PCR and seroprevalence of SARS-CoV-2 in patients and healthcare workers at a single HSCT center. Results have also corroborated how the rigorous protocols adopted in transplant centers were even more strengthened in this pandemic scenario.

https://doi.org/10.1590/s1678-9946202264039

Effect of curcumin on acute chronic kidney disease due to ischemia-reperfusion syndrome
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Silva, Eloiza de Oliveira

; Conde, Carolina

; Machado, Douglas Ikedo

; Ventura, Sara

; Couto, Sheila Marques Fernandes

; Vattimo, Maria de Fátima Fernandes

Revista da Escola de Enfermagem da USP

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2022, Volume 56 N. spe elocation e20210440

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

RESUMO Objetivo: Avaliar o efeito da curcumina na função renal, hemodinâmica e perfil oxidativo renal de ratos com doença renal crônica (DRC) submetidos a isquemia-reperfusão renal (I/R). Métodos: Ratos Wistar, 250–300 g, distribuídos em quatro grupos: Sham (n = 5), simulação da DRC; DRC (n = 5), ablação de 5/6 dos rins para indução de DRC; DRC + I/R (n = 5), DRC e clampeamento do pedículo renal por 30 minutos; DRC + I/R + curcumina (n = 5) e DRC + I/R, administração de curcumina 30 mg/kg/dia, via oral, por 10 dias. Foram avaliadas a função renal (clearance de inulina, fluxo urinário, creatinina plasmática), hemodinâmica (pressão arterial) e perfil oxidativo (peróxidos, TBARS e nitrato urinário, tióis solúveis não proteicos no tecido renal). Resultados: O grupo DRC + I/R + curcumina apresentou elevação do clearance de inulina e redução da creatinina plasmática, diminuição da RVR e aumento do FSR, diminuição de metabólitos oxidativos na urina e aumento dos tióis no tecido renal quando comparado ao grupo DRC + I/R. Conclusão: O tratamento com curcumina preservou a função e hemodinâmica renal dos animais com DRC agudizada, promovendo melhora no perfil oxidativo, com redução de oxidantes e preservação de reserva antioxidante.

ABSTRACT Objective: To evaluate the effect of curcumin on renal function, hemodynamics, and renal oxidative profile of rats with chronic kidney disease (CKD) subjected to renal ischemia-reperfusion injury (IRI). Methods: Wistar rats, 250–300 g, distributed in four groups: Sham (n = 5), CKD simulation; CKD (n = 5), 5/6 renal ablation for CKD induction; CKD + IRI (n = 5), CKD and renal pedicle clamping for 30 minutes; and CKD + IRI+curcumin (n = 5), CKD + IRI, curcumin administration 30 mg/kg/day, orally, for 10 days. Renal function (inulin clearance, urine flow, plasma creatinine), hemodynamics (blood pressure), and oxidative profile (peroxides, TBARS, and urine nitrate, non-protein soluble thiols in renal tissue) were evaluated. Results: The CKD + IRI + curcumin group showed increased inulin clearance and reduced plasma creatinine, decreased RVR and increased RBF, decreased oxidative metabolites in urine and increased thiols in renal tissue when compared with the CKD + IRI group. Conclusion: The treatment with curcumin preserved renal function and hemodynamics of animals with acute CKD, improving oxidative profile, with reduction of oxidants and preservation of antioxidant reserve.

RESUMEN Objetivo: Evaluar el efecto de la curcumina sobre la función renal, hemodinámica y el perfil oxidativo renal en ratas con enfermedad renal crónica (ERC) sometidas a isquemia-reperfusión renal (I/R). Métodos: Ratas Wistar, entre 250–300 g, divididas en cuatro grupos: Sham (n = 5), simulación de ERC; ERC (n = 5), ablación de 5/6 de los riñones para inducción de ERC; ERC + I/R (n = 5), ERC y pinzamiento del pedículo renal durante 30 minutos; y ERC + I/R + curcumina (n = 5) y ERC + I/R, administración de curcumina 30 mg/kg/día, vía oral, durante 10 días. Se evaluaron la función renal (clearance de inulina, flujo urinario, creatinina plasmática), hemodinámica (presión arterial) y el perfil oxidativo (peróxidos, TBARS y nitrato urinario, tioles solubles no proteicos en tejido renal). Resultados: El grupo ERC + I/R + curcumina tuvo un aumento en el clearance de inulina y disminución de creatinina plasmática, disminución de la RVR y aumento del FSR, disminución de metabolitos oxidativos en orina y aumento de tioles en el tejido renal en comparación con el grupo ERC + I/R. Conclusión: El tratamiento con curcumina preservó la función renal y la hemodinámica de los animales con ERC agravada, promoviendo una mejora en el perfil oxidativo, con reducción de oxidantes y preservación de la reserva antioxidante.

https://doi.org/10.1590/1980-220x-reeusp-2021-0440en

Influência do tipo de agregado na resistência e deformabilidade de blocos estruturais produzidos com concreto seco: estudo numérico, experimental e estatístico
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Leal, Cleber Eduardo Fernandes

; Medeiros, Wallison Angelim

; Maebara, André Kazunori

; da Silva, Douglas Henrique

; Parsekian, Guilherme Aris

; Christoforo, André Luis

Matéria (Rio de Janeiro)

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2022, Volume 27 N. 3 elocation e20220050

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

RESUMO O comportamento da alvenaria estrutural resulta do desempenho de cada componente: unidades, juntas de argamassa, grautes e armaduras. Comercialmente, os blocos para alvenaria são produzidos com concreto seco ou zero-slump. Sua dosagem e propriedades físicas se diferem consideravelmente dos concretos convencionais e dependem da eficiência de compactação das máquinas vibroprensas. Ensaiar elementos de alvenaria em tamanho natural é dispendioso e requer uma infraestrutura específica. Nessa perspectiva, modelagens computacionais baseadas em formulações numéricas como o Método dos Elementos Finitos (FEM) podem se tornar alternativas viáveis e de grande potencial. Este trabalho objetiva analisar numérica e experimentalmente a influência do tipo de agregado nas propriedades físicas e, sobretudo, mecânicas (módulo secante e resistência à compressão) de blocos vazados de concreto para alvenaria estrutural. Foram testadas três resistências de bloco (6, 12 e 24 MPa), contendo três tipos de agregado (basalto, gnaisse e calcário). Dos resultados, observou-se que em blocos menos resistentes a porosidade das misturas influenciou mais as propriedades mecânicas que a rigidez do agregado. À medida que os concretos se tornam mais densos e resistentes, esse comportamento muda. Os modelos implementados e calibrados pelos resultados experimentais reproduziram satisfatoriamente o modo de ruptura dos blocos, os resultados de módulo e de resistência.

ABSTRACT The structural masonry behavior results from the performance of each component: units, mortar joints, grouts, and reinforcement. Commercially, masonry blocks are made with called dry or zero-slump concrete. Its dosage and physical properties differ considerably from conventional concretes and depend on vibropress machines compaction efficiency. Testing full-size masonry elements is expensive and demand a specific infrastructure. Thus, computer modeling based on numerical formulations such as the Finite Element Method (FEM) can become viable and high potential alternatives. This work aims to analyze numerically and experimentally the influence of aggregate type on physical and, mainly, mechanical properties (ultimate strength and secant deformation module in compression) of hollow concrete blocks for structural masonry. Units of three different strengths (6, 12 and 24 MPa) and containing three different aggregate types (basalt, gneiss, and limestone) were tested. From results, it was observed that in less resistant blocks, the mixtures porosity influenced mechanical properties more than aggregate stiffness. As concretes become denser and stronger, this behavior changes. The models implemented and calibrated by the experimental results were satisfactory in reproducing the failure mode of the blocks, secant modulus and compressive strength results.

https://doi.org/10.1590/1517-7076-rmat-2022-0050

10.

Muffin with pumpkin flour: technological, sensory and nutritional quality
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Scarton, Michele

; Nascimento, Gustavo Costa

; Felisberto, Mária Herminia Ferrari

; Moro, Thaísa de Menezes Alves

; Behrens, Jorge Herman

; Barbin, Douglas Fernandes

; Clerici, Maria Teresa Pedrosa Silva

Brazilian Journal of Food Technology

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2021, Volume 24 elocation e2020229

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

Resumo A abóbora é um vegetal de cor amarela ou laranja, de sabor suave, que se destaca como fonte de fibra e nutrientes. Porém, os produtos com abóboras ainda são pouco explorados no Brasil, devido à sua alta perecibilidade in natura e à falta de hábitos alimentares dos produtos de panificação regionais. O objetivo deste estudo foi produzir e caracterizar uma farinha de abóbora para ser utilizada como ingrediente em muffins, além de avaliar as características tecnológicas e sensoriais desses bolos, e selecionar o muffin com maior aceitação sensorial para avaliação de sua composição nutricional. Foram produzidos três muffins: um controle (M0) e dois contendo de 5 (M1) e 10 (M2) g/100 g de substituição parcial da farinha de trigo pela farinha de abóbora, mantendo-se os demais ingredientes comuns aos bolos. Foram avaliadas as características tecnológicas de firmeza, volume e cor. A aceitação sensorial foi avaliada utilizando um teste afetivo em escala hedônica não estruturada de nove pontos. Não houve diferenças significativas na firmeza e na análise de imagem (distribuição, tamanho e área dos poros do miolo) entre os três muffins, porém M1 e M2 apresentaram cor da crosta mais escura, miolo mais laranja e menor volume em relação ao M0. Foi considerada a aceitabilidade sensorial dos muffins como critério de seleção para análise da composição nutricional. A aceitação dos muffins M1 foi melhor do que a aceitação de M0, mas sem diferenças em relação a M2. A opinião dos consumidores também foi considerada e M1 foi selecionado por ter maior aceitação. Nutricionalmente, M0 e M1 apresentaram teores semelhantes de proteínas, carboidratos digestíveis e lipídios, mas M1 apresentou um maior teor de cinzas e fibras totais: 2,01 ± 0,03 e 1,57 g/100 g (base seca), respectivamente. Assim, a farinha de abóbora poderá ser produzida e usada como ingrediente regional, enriquecido e de cor natural para muffins ou outros produtos de panificação e, dessa forma, ter um impacto socialmente positivo para os pequenos agricultores.

Abstract Pumpkin is a yellow or orange-colored vegetable with a mild flavor that stands out as a fiber and nutrient source. However, the products with pumpkins are still little explored in Brazil, due to high perishability in natura and to the lack of eating habits of regional baked goods. This study aimed to produce and characterize a pumpkin flour to be used as an ingredient in muffins, evaluate the technological, and sensory characteristics of these cakes, and select the most sensorially accepted muffin for nutritional composition evaluation. Three muffins were produced as following: one control (M0); and two containing 5 (M1) and 10 (M2) g/100 g of partial substitution of wheat flour by pumpkin flour, thus maintaining the other ingredients common to cakes. The technological characteristics of firmness, volume and color were evaluated. Sensory acceptance was assessed using an affective test on an unstructured 9-point hedonic scale. There were no significant differences in the firmness and image analysis (distribution, size, and pore area of the crumb) among the three muffins, however, M1 and M2 presented darker crust color, more orange crumb, and a lower volume compared to M0. The sensory acceptability of the muffins was considered as a criterion for selection for nutritional composition analysis. The muffins’ acceptance of M1 was better than M0, but without differences to M2. The consumers’ opinions were also considered, and M1 was selected for having greater acceptance. Nutritionally, M0 and M1 presented similar levels of proteins, digestible carbohydrates, and lipids, however, M1 showed a higher content of ash and total dietary fibers: 2.01 ± 0.03 and 1.57 g/100 g (dry basis), respectively. Thus, the pumpkin flour could be produced and used as a regional, enriched, and natural-colored ingredient for muffins or other bakery products, and therefore they had a socially positive impact on family farming.

https://doi.org/10.1590/1981-6723.22920 59 downloads

11.

Biosafety: physiotherapy students’ knowledge about techniques and behavior in cross-infection control
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Santos, Thays Helena Moyses dos

; Sambe, Angélica Yumi

; Oliveira, Lucas Vieira de

; Campos Junior, Vagner Pires de

; Proença, Mahara-Daian Garcia Lemes

; Silva, Douglas Fernandes da

Fisioterapia em Movimento

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2021, Volume 34 elocation e34106

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

Resumo Introdução: Biossegurança é o conjunto de medidas aplicadas para prevenir a propagação de agentes infecciosos. Por meio da biossegurança é possível evitar e inibir os riscos que comprometem a saúde do indivíduo, dos animais e do meio ambiente. Objetivo: Avaliar o conhecimento sobre biossegurança de estudantes de graduação em fisioterapia e fisioterapeutas. Métodos: O trabalho foi uma pesquisa de campo com universo definido, e classificado como descritivo e exploratório-quantiqualitativo. A amostra foi composta por 93 alunos do curso de fisioterapia da Universidade Estadual do Norte do Paraná, em Jacarezinho, e 10 profissionais atuantes na região norte do Paraná. Os dados foram coletados por meio de um questionário sobre o conhecimento sobre biossegurança e infecções cruzadas. A análise estatística foi realizada no software SPPS versão 25.0 e os dados submetidos ao teste de normalidade Shapiro-Wilk, com as variáveis em mediana e intervalo interquartil (25% -75%). O teste qui-quadrado foi aplicado para buscar diferenças estatisticamente significantes entre os diferentes anos do curso de fisioterapia e os profissionais formados. Por meio da análise de conteúdo foram escolhidas questões abertas, tratamento e análise de dados qualitativos. O nível de significância adotado foi de 5%. Resultados: Constatou-se que existe um pequeno déficit no conhecimento em biossegurança, no entanto, esses conhecimentos de certa forma aumentaram com a evolução dos acadêmicos no curso (p < 0,05). Conclusão: A maioria dos estudantes e profissionais possui conhecimentos suficientes para controlar ou mesmo erradicar os riscos de determinadas atividades e evitar a infecção cruzada na prática da fisioterapia. O déficit de conhecimento em biossegurança constatado pode ser facilmente resolvido com a disseminação adequada do conhecimento sobre o assunto.

Abstract Introduction: Biosafety consists in the set of measures applied to prevent the spread of infectious agents. Through biosafety, it is possible to avoid and inhibit the risks that compromise the health of the individual, animals and the environment. Objective: To evaluate the knowledge about biosafety in undergraduate physiotherapy students and physiotherapists. Methods: The work was a field study with a defined universe, and classified as descriptive, exploratory, quantitative-qualitative. The sample consisted of 93 physiotherapy students from the Universidade Estadual do Norte do Paraná (State University of Northern Paraná), Jacarezinho, Brazil, and 10 professionals working in the region. Data were collected through a questionnaire on knowledge about biosafety and cross-infections. A statistical analysis was performed using SPPS software version 25.0, and the data was evaluated by the Shapiro-Wilk normality test, and the variables expressed as median and interquartile range (25% -75%). The chi-square test was applied to determine statistically significant differences between the different years of the physiotherapy course and the trained professionals. Through content analysis, open treatment and analysis of qualitative data were chosen. The level of significance used was 5%. Results: There was a small deficit in the knowledge of biosafety; however, this knowledge increased to some extent with the evolution of students in the course (p < 0.05). Conclusion: Most students and professionals have enough knowledge to control or even eradicate the risks of certain activities and prevent cross-infection in the practice of physiotherapy. The perceived deficit in knowledge in biosafety can be easily resolved with the adequate dissemination of knowledge on the subject.

https://doi.org/10.1590/fm.2021.34106 538 downloads

12.

Insect (Hexapoda) diversity in the oceanic archipelago of Fernando de Noronha, Brazil: updated taxonomic checklist and new records
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Rafael, José Albertino

; Limeira-de-Oliveira, Francisco

; Hutchings, Roger William

; Miranda, Gil Felipe Gonçalves

; Silva Neto, Alberto Moreira da

; Somavilla, Alexandre

; Camargo, Alexssandro

; Asenjo, Angélico

; Pinto, Ângelo Parise

; Bello, Ayr de Moura

; Dalmorra, Camila

; Mello-Patiu, Cátia Antunes de

; Carvalho, Claudio José Barros de

; Takiya, Daniela Maeda

; Parizotto, Daniele Regina

; Marques, Dayse Willkenia Almeida

; Cavalheiro, Denis de Oliveira

; Mendes, Diego Matheus de Mello

; Zeppelini, Douglas

; Carneiro, Eduardo

; Lima, Élison Fabrício Bezerra

; Lima, Estevam Cipriano Araújo de

; Godoi, Fabio Siqueira Pitaluga de

; Pessoa, Felipe Arley Costa

; Vaz-de-Mello, Fernando Zagury

; Sosa-Duque, Francisco José

; Flores, Heloísa Fernandes

; Fernandes, Itanna Oliveira

; Silva-Júnior, José Osvaldo

; Gomes, Lucas Roberto Pereira

; Monné, Marcela Laura

; Castro, Marcelo Cutrim Moreira de

; Silva, Marcelo Peixoto Gomes da

; Couri, Márcia Souto

; Gottschalk, Marco Silva

; Soares, Matheus Mickael Mota

; Monné, Miguel Angel

; Rafael, Miriam Silva

; Casagrande, Mirna Martins

; Mielke, Olaf Hermann Hendrik

; Grossi, Paschoal Coelho

; Pinto, Paula Jéssica Costa

; Bartholomay, Pedro Reck

; Sobral, Rafael

; Heleodoro, Raphael Aquino

; Machado, Renato José Pires

; Corrêa, Robson Crepes

; Hutchings, Rosa Sá Gomes

; Ale-Rocha, Rosaly

; Santos, Sandra Duque dos

; Lima, Sheila Pereira de

; Mahlmann, Thiago

; Silva, Vera Cristina

; Fernandes, Daniell Rodrigo Rodrigues

Revista Brasileira de Entomologia

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2020, Volume 64 N. 3 elocation e20200052

Abstract: En | Text: En | PDF: En

ABSTRACT Hexapods, commonly known as insects, are a neglected taxonomic group in the Fernando de Noronha archipelago, with unanswered questions about their species richness and the ecological processes in which they are involved (e.g., colonization, introduction, establishment, and extinction). Herein, we provide an updated Hexapod checklist with current nomenclatural combinations. The entomofauna of the Fernando de Noronha archipelago is currently composed of 453 species in 21 orders. The orders, and their respective number of species, are: Blattaria (9), Coleoptera (118), Collembola (29), Dermaptera (3), Diplura (1), Diptera (134), Embioptera (1), Hemiptera (29), Hymenoptera (59), Isoptera (2), Lepidoptera (25), Mantodea (1), Neuroptera (3), Odonata (5), Orthoptera (11), Phasmatodea (1), Phthiraptera (6), Psocoptera (3), Siphonaptera (1), Thysanoptera (10), and Zygentoma (2). The archipelago has 263 new taxon records (family + genera + species). Thirty-eight species (3.39%) were described from local specimens and most of them are likely endemic species. This study more than doubles our knowledge (from the previous 190 records) of the entomofauna in this large Brazilian archipelago. This study also provides a baseline for studies on its conservation status and for implementing future environmental management programs.

https://doi.org/10.1590/1806-9665-rbent-2020-0052 2462 downloads

13.

A Kunitz-type peptide from Dendroaspis polylepis venom as a simultaneous inhibitor of serine and cysteine proteases
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Kodama, Roberto Tadashi

; Kuniyoshi, Alexandre Kazuo

; Silva, Cristiane Castilho Fernandes da

; Cajado-Carvalho, Daniela

; Duzzi, Bruno

; Mariano, Douglas Ceolin

; Pimenta, Daniel C.

; Borges, Rafael

; Silva, Wilmar Dias da

; Portaro, Fernanda Calheta Vieira

Journal of Venomous Animals and Toxins including Tropical Diseases

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2020, Volume 26 elocation e20200037

Abstract: En | Text: En | PDF: En

Abstract Background: Proteases play an important role for the proper physiological functions of the most diverse organisms. When unregulated, they are associated with several pathologies. Therefore, proteases have become potential therapeutic targets regarding the search for inhibitors. Snake venoms are complex mixtures of molecules that can feature a variety of functions, including peptidase inhibition. Considering this, the present study reports the purification and characterization of a Kunitz-type peptide present in the Dendroaspis polylepis venom as a simultaneous inhibitor of elastase-1 and cathepsin L. Methods: The low molecular weight pool from D. polylepis venom was fractionated in reverse phase HPLC and all peaks were tested in fluorimetric assays. The selected fraction that presented inhibitory activity over both proteases was submitted to mass spectrometry analysis, and the obtained sequence was determined as a Kunitz-type serine protease inhibitor homolog dendrotoxin I. The molecular docking of the Kunitz peptide on the elastase was carried out in the program Z-DOCK, and the program RosettaDock was used to add hydrogens to the models, which were re-ranked using ZRANK program. Results: The fraction containing the Kunitz molecule presented similar inhibition of both elastase-1 and cathepsin L. This Kunitz-type peptide was characterized as an uncompetitive inhibitor for elastase-1, presenting an inhibition constant (Ki) of 8 μM. The docking analysis led us to synthesize two peptides: PEP1, which was substrate for both elastase-1 and cathepsin L, and PEP2, a 30-mer cyclic peptide, which showed to be a cathepsin L competitive inhibitor, with a Ki of 1.96 µM, and an elastase-1 substrate. Conclusion: This work describes a Kunitz-type peptide toxin presenting inhibitory potential over serine and cysteine proteases, and this could contribute to further understand the envenomation process by D. polylepis. In addition, the PEP2 inhibits the cathepsin L activity with a low inhibition constant.

https://doi.org/10.1590/1678-9199-jvatitd-2020-0037 697 downloads

14.

Salvage treatment for refractory or relapsed acute myeloid leukemia: a 10-year single-center experience
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Silva, Wellington Fernandes da

; Rosa, Lidiane Inês da

; Seguro, Fernanda Salles

; Silveira, Douglas Rafaele Almeida

; Bendit, Israel

; Buccheri, Valeria

; Velloso, Elvira Deolinda Rodrigues Pereira

; Rocha, Vanderson

; Rego, Eduardo M.

Clinics

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2020, Volume 75 elocation e1566

Abstract: En | Text: En | PDF: En

OBJECTIVES: The outcomes of refractory and relapsed acute myeloid leukemia (AML) patients in developing countries are underreported, even though the similar classic regimens are widely used. METHODS: We conducted a retrospective comparison of “MEC” (mitoxantrone, etoposide, and cytarabine) and “FLAG-IDA” (fludarabine, cytarabine, idarubicin, and filgrastim) in adults with first relapse or refractory AML. RESULTS: In total, 60 patients were included, of which 28 patients received MEC and 32 received FLAG-IDA. A complete response (CR) rate of 48.3% was observed. Of the included patients, 16 (27%) died before undergoing bone marrow assessment. No statiscally significant difference in CR rate was found between the two protocols (p=0.447). The median survival in the total cohort was 4 months, with a 3-year overall survival (OS) rate of 9.7%. In a multivariable model including age, fms-like tyrosine kinase 3 (FLT3) status, and stem-cell transplantation (SCT), only the last two indicators remained significant: FLT3-ITD mutation (hazard ratio [HR]=4.6, p<0.001) and SCT (HR=0.43, p=0.01). CONCLUSION: In our analysis, there were no significant differences between the chosen regimens. High rates of early toxicity were found, emphasizing the role of supportive care and judicious selection of patients who are eligible for intensive salvage therapy in this setting. The FLT3-ITD mutation and SCT remained significant factors for survival in our study, in line with the results of previous studies.

https://doi.org/10.6061/clinics/2020/e1566 1553 downloads

15.

ACTIVITY OF RHIZOSPHERE SOIL MICROORGANISMS OF SUGARCANE CULTIVARS AFTER SPRAYING OF HERBICIDES: DIURON, TEBUTHIURON, AMETRYN AND DIURON + HEXAZINONE
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FARIA, AUTIERES TEIXEIRA

; GONÇALVES, BEATRIZ FERNANDES DE SEIA

; SARAIVA, DOUGLAS TEIXEIRA

; SOUZA, MATHEUS DE FREITAS

; SILVA, ANTONIO ALBERTO DA

; SILVA, DANIEL VALADÃO

Revista Caatinga

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jul 2018, Volume 31 N. 3 Pages 593 - 601

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

RESUMO Alterações no ambiente agrícola podem ser determinadas por meio indicadores microbiológicos do solo, uma vez que a microbiota do solo é sensível às modificações do ambiente. Desta forma, avaliou-se o impacto de herbicidas de longo efeito residual sobre a microbiota rizosférica de cultivares de cana-de-açúcar. As cultivares de cana-de-açúcar SP 81-3250 e RB 867515 foram tratadas com quatro herbicidas (tebuthiuron, diuron, ametryn e a mistura diuron + hexazinone) aplicados em pré-emergência. Os herbicidas foram aplicados sete dias após o plantio das gemas. Aos 30, 60 e 90 dias após a aplicação, o solo rizosferico de cada tratamento foi coletado para determinar a evolução de CO2 no solo (C-CO2), o carbono da biomassa microbiana (MBC), o quociente metabólico (qCO2), o potencial de solubilização de P inorgânico (PSFI) e a percentagem de raízes colonizadas por fungos micorrízicos arbusculares. Não foram observadas alterações na atividade microbiana da rizosfera da cana-de-açúcar aos 30 dias após a aplicação dos herbicidas (DAA). No entanto, aos 90 DAA todos os herbicidas afetaram negativamente a atividade dos micro-organismos rizosféricos da cana-de-açúcar. A atividade metabólica da rizosfera em solo cultivado com a RB 867515 foi menos afetada pelos herbicidas.

ABSTRACT Changes in the agricultural environment can be determined by providing microbiological indicators of the soil since the soil microorganisms are sensitive to variations in the environment. In this way, the impact of herbicides of long residual effect on the rhizospheric soil microorganisms of sugarcane cultivars was evaluated. The cultivars of sugarcane (SP 81-3250 and RB 867515) were treated with four herbicides (tebuthiuron, diuron, ametryn and mixture of diuron + and hexazinone) applied in pre-emergence. The herbicides were applied seven days after the planting of the gems. At 30, 60 and 90 days after the application, the soil rhizosphere was collected in each treatment to determine the CO2 evolution of the soil (C-CO2), microbial biomass carbon (MBC), metabolic quotient (qCO2), solubility potential of inorganic phosphorus P (PSFI) and percentage of roots colonized by mycorrhizal fungi Arbuscular. No changes were observed in the microbial activity of the sugarcane rhizosphere at 30 days after application of the herbicides (DAA). However, at 90 DAA, all herbicides negatively affected the activity of the rhizospheric microorganisms of sugarcane. The metabolic activity of rhizosphere in soil cultivated with RB 867515 was less affected by herbicides.

https://doi.org/10.1590/1983-21252018v31n307rc 855 downloads

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