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au:OLIVEIRA, ALAN TEIXEIRA DE

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Geophysical key indicators for tailings dam physical integrity monitoring - Brazil
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Sá, Gilvan

; Braga, Marco Antonio

; Almeida, Luiz Antonio Pinto e

; Dias, Leonardo Santana de Oliveira

; Cunha, Alan de Souza

; Rocha, Demetrius Cunha Gonçalves da

; Telles, Ricardo Luiz Teixeira

REM - International Engineering Journal

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dec 2023, Volume 76 N. 4 Pages 363 - 370

Abstract: En | Text: En | PDF: En

Abstract The geotechnical monitoring of tailings dams combined with a suitable application of geophysical electrical methods can improve their structure evaluation, allowing several correlations between direct analyses and the resistivity anomaly pattern. Considering this synergy, twenty-three electrical resistivity sections (ERT) were acquired along the beach, abutments, and central part of a dam, totalizing 10,776 m of dataset. After the interpretation of each ERT section, comparing the anomaly ranges with the water level meters measurements, three resistivity zones were defined: Zones of low resistivity (<64 ohm-m), correlated to regions of high humidity; zones of high resistivity (> 357 ohm-m), interpreted as dry zones, and regions with intermediate resistivity values, located between these limits. The groundwater surface generated from the interpretation of the electrical resistivity dataset and the groundwater surface acquired from the water level gauges were almost coincident. On the right abutment, the conductive anomalies showed remarkable continuity, suggesting a high moisture content in this region with strong gradients (200 mV) directed towards the zone of low resistivity values identified in the sections. The analysis showed a robust correlation of the ERT data with localized physical geotechnical measurements, valuable for monitoring dam integrity, overseeing the structure's response to climate and operational changes, and ultimately mitigating the risks of failure. The results of this study support the adoption of a seasonal 4D electrical resistivity survey as an effective tool to monitor and manage surface and high humidity zones, key indicators of dam integrity throughout the entire structure.

https://doi.org/10.1590/0370-44672022760030

National Vaccine Coverage Survey 2020: methods and operational aspects
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Barata, Rita Barradas

; França, Ana Paula

; Guibu, Ione Aquemi

; Vasconcellos, Maurício Teixeira Leite de

; Moraes, José Cássio de

; Teixeira, Maria da Gloria Lima Cruz

; Domingues, Carla Magda Alan

; Borges, Maria Fernanda de Souza Oliveira

; de Azevedo, Roberta Nogueira Calandrini

; de Oliveira, Consuelo Silva

; Oliveira, Andrea de Nazaré Marvão

; Canales, Ivy Thereza

; Nascimento, Valdir

; Queiroz, Rejane Christine de Souza

; Lima, Luísa Helena de Oliveira

; Ramos Jr, Alberto Novaes

; Barbosa, Jaqueline Caracas

; Mirabal, Isabelle Ribeiro Barbosa

; Meira, Meiruska

; Antunes, Maria Bernadete de Cerqueira

; Teixeira, Maria Denise de Castro

; Gurgel, Ricardo Queiroz

; de Carvalho, Martha Suely Itaparica

; Cesar, Tayñana

; Maciel, Ethel Leonor Noia

; da Gama, Silvana Granado Nogueira

; Luhm, Karin Regina

; Boing, Antônio Fernando

; Mengue, Sotero Serrate

; de Oliveira, Sandra Maria do Valle Leone

; Lima, Jaqueline Costa

; Teles, Sheila Araújo

; Caetano, Karlla Antonieta Amorim

; de Araújo, Wildo Navegantes

Revista Brasileira de Epidemiologia

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2023, Volume 26 elocation e230031

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

RESUMO Objetivo: Inquérito nacional de cobertura vacinal aos 12 e 24 meses de idade foi realizado para investigar as quedas nas coberturas a partir de 2016. Métodos: Amostra de 37.836 nascidos vivos das coortes de 2017 e 2018 residentes nas capitais, Distrito Federal (DF) e 12 cidades com mais de 100 mil habitantes, acompanhados nos primeiros 24 meses por registros nas cadernetas de vacinação. Setores censitários foram estratificados segundo condições socioeconômicas, e o mesmo número de crianças foi incluído para cada estrato. Calcularem-se coberturas vacinais de cada vacina e coberturas completas aos 12 e 24 meses, doses aplicadas, válidas e oportunas. Fatores familiares, maternos e da criança associados à cobertura foram pesquisados. Os motivos para não vacinar analisados foram: contraindicações médicas, dificuldades de acesso, problemas no funcionamento do programa e hesitação vacinal. Resultados: Os resultados preliminares mostram que menos de 1% das crianças não foram vacinadas, as coberturas pelo esquema completo são menores que 75% em todas as capitais e no DF, as vacinas com mais de uma dose perdem cobertura progressivamente, há diferenças entre os estratos socioeconômicos, favoráveis aos estratos mais altos em algumas cidades e aos estratos mais baixos em outras. Conclusão: Houve realmente redução da cobertura vacinal em todas as capitais e no DF para as crianças nascidas em 2017 e 2018, denotando piora na execução do Programa Nacional de Imunizações durante os anos de 2017 a 2019. O inquérito realizado não mensurou os impactos da pandemia de COVID-19 que podem ter reduzido ainda mais as coberturas vacinais.

ABSTRACT Objective: The national vaccination coverage survey on full vaccination at 12 and 24 months of age was carried out to investigate drops in coverage as of 2016. Methods: A sample of 37,836 live births from the 2017 or 2018 cohorts living in capital cities, the Federal District, and 12 inner cities with 100 thousand inhabitants were followed for the first 24 months through vaccine record cards. Census tracts stratified according to socioeconomic levels had the same number of children included in each stratum. Coverage for each vaccine, full vaccination at 12 and 24 months and number of doses administered, valid and timely, were calculated. Family, maternal and child factors associated with coverage were surveyed. The reasons for not vaccinating analyzed were: medical contraindications, access difficulties, problems with the program, and vaccine hesitancy. Results: Preliminary results showed that less than 1% of children were not vaccinated, full coverage was less than 75% at all capitals and the Federal District, vaccines requiring more than one dose progressively lost coverage, and there were inequalities among socioeconomic strata, favorable to the highest level in some cities and to the lowest in others. Conclusion: There was an actual reduction in full vaccination in all capitals and the Federal District for children born in 2017 and 2018, showing a deteriorating implementation of the National Immunization Program from 2017 to 2019. The survey did not measure the impacts of the COVID-19 pandemic, which may have further reduced vaccination coverage.

https://doi.org/10.1590/1980-549720230031

General Approach to Acute Myocardial Infarction with Nonobstructive Coronary Arteries (MINOCA): A Systematic Review
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Oliveira, Marcos Aurélio Barboza de

; Ósti, Alan Vinicius Gamero

; Cavalheiro, Bruno Vargas Teixeira

; Naves, Déborah Barbosa

; Oliveira, Emanuelle Ribeiro de

; Campos, Gabriel Freitas de

; Lobo, Gabriel Mael Sussuarana Silva

; Oliveira, Gabriely de

; Mainardi, Marcela Paula

; Guimarães, Marília Cardoso

; Barbosa, Robert Filipe

; Fé, Vilian Veloso de Moura

International Journal of Cardiovascular Sciences

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2023, Volume 36 elocation e20220046

Abstract: En | Text: En | PDF: En

Abstract Background Acute myocardial infarction (AMI) without obstructive coronary arteries (MINOCA) is a medical condition of great relevance, with clinical characteristics of AMI, but without evidence of coronary artery obstruction. The mechanism involved in the pathophysiology of the disease and its possible etiologies are important objects of study due to their impact on the morbidity and mortality of affected patients. Objectives The aim of this study was to systematically review MINOCA and its characteristics, with emphasis on the clinical profile of patients, etiology, pathophysiology, diagnosis, and treatment of the syndrome. Methods Relevant articles related to MINOCA were analyzed in the PubMed and LILACS databases. In the initial search stage, 619 eligible articles were obtained, with final inclusion criteria being: original systematic reviews with clinical, epidemiological, diagnostic, or treatment data on MINOCA, published in Portuguese or English, with an abstract, and a publication date limit of September 2020. Results A total of 10 articles classified as systematic reviews that considered clinical data on MINOCA were included in this review. Conclusion After analyzing various literature, the present study provided a tool to better understand MINOCA, not only regarding its casuistry but also in grouping parameters and information that contribute to a healthy approach to this clinical situation. It was possible to identify and better outline the clinical profile of patients who presented this condition and the use of appropriate tools for correct diagnosis and ideal treatment.

https://doi.org/10.36660/ijcs.20220046

National Vaccine Coverage Survey 2020: methods and operational aspects
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Barata, Rita Barradas

; França, Ana Paula

; Guibu, Ione Aquemi

; Vasconcellos, Maurício Teixeira Leite de

; Moraes, José Cássio de

; Teixeira, Maria da Gloria Lima Cruz

; Domingues, Carla Magda Alan

; Borges, Maria Fernanda de Souza Oliveira

; de Azevedo, Roberta Nogueira Calandrini

; de Oliveira, Consuelo Silva

; Oliveira, Andrea de Nazaré Marvão

; Canales, Ivy Thereza

; Nascimento, Valdir

; Queiroz, Rejane Christine de Souza

; Lima, Luísa Helena de Oliveira

; Ramos Jr, Alberto Novaes

; Barbosa, Jaqueline Caracas

; Mirabal, Isabelle Ribeiro Barbosa

; Meira, Meiruska

; Antunes, Maria Bernadete de Cerqueira

; Teixeira, Maria Denise de Castro

; Gurgel, Ricardo Queiroz

; de Carvalho, Martha Suely Itaparica

; Cesar, Tayñana

; Maciel, Ethel Leonor Noia

; da Gama, Silvana Granado Nogueira

; Luhm, Karin Regina

; Boing, Antônio Fernando

; Mengue, Sotero Serrate

; de Oliveira, Sandra Maria do Valle Leone

; Lima, Jaqueline Costa

; Teles, Sheila Araújo

; Caetano, Karlla Antonieta Amorim

; de Araújo, Wildo Navegantes

Revista Brasileira de Epidemiologia

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2023, Volume 26 elocation e230031

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

https://doi.org/10.1590/1980-549720230031

Performance of potential parents for a rainfed tropical wheat breeding program
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Teixeira, Camila Helena

; Fernandes, Maiara Oliveira

; Chaves, Alan Diego do Rosário

; Almeida, Brena Kelly da Silva

; Savioli, Giovane Bruno

; Martins, Fábio Aurélio Dias

; Padua, José

; Condé, Aurinelza Batista Teixeira

; Nunes, Jose Airton Rodrigues

Crop Breeding and Applied Biotechnology

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2023, Volume 23 N. 3 elocation e45452336

Abstract: En | Text: En | PDF: En

Abstract The aim of this study was to evaluate the genetic variability and performance of the agronomic traits of wheat cultivars in the southern region of Minas Gerais for the purpose of choosing parents for a rainfed wheat breeding program. We evaluated 78 wheat cultivars in two locations in Minas Gerais regarding different agronomic traits. The statistical analyses were carried out using Henderson’s mixed-model approach. The genetic values of the cultivars were predicted, and the heritabilities and accuracies were estimated for selection of cultivars. The cultivar × location interaction was decomposed into its simple and complex fractions. The genetic and environmental correlations between the traits were estimated, and selection was made for multiple traits using the sum of the standardized variables (Z-index). The genetic variance was significant for all the traits, and the cultivar × location interaction was significant. By the Z-index, 15 wheat cultivars more adapted were identified.

https://doi.org/10.1590/1984-70332023v23n3a29

Ecotoxicological Effects of Biochar Obtained from Spent Coffee Grounds
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Souza, Lorrana Zélia Martins de

; Pinto, Bruna Cristina

; Alves, Adriana Barboza

; Ribeiro, Amanda Vanessa de Oliveira

; Feliciano, Débora Cristina Teodoro

; Silva, Luisa Heringer da

; Dias, Thiago Tales Moraes

; Yılmaz, Murat

; Oliveira, Magno André de

; Bezerra, Augusto Cesar da Silva

; Ferreira, Osania Emerenciano

; Lima, Robson Pereira de

; Pimenta, Lúcia Pinheiro do Santos

; Machado, Alan Rodrigues Teixeira

Materials Research

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2022, Volume 25 Suppl. 2 elocation e20220013

Abstract: En | Text: En | PDF: En

Abstract The objective of this work is to investigate the conversion of spent coffee grounds (SCG) into biochar (BSC) and the ecotoxicological effects of the product obtained. The SCG and BSC were characterized by characterized by different techniques (TGA/DTG, FTIR, XRD, SEM, EDS, and EDXRF). Proton Nuclear Magnetic Resonance (1H NMR) was used to characterize the aqueous extract of BSC. The inhibitory effect on lettuce (Lactuca sativa) germination was investigated. Besides, antimicrobial activity evaluation trials were conducted with Azospirillum brasilense and Trichoderma spp. The results showed that in the BSC production process, the extractives and lignocellulosic components in the SCG were partly decomposed. Tests conducted with microorganisms did not reveal any toxic effect of BSC. However, high phytotoxicity against lettuce was recorded for rate 100 t/ha of BSC. This effect was associated with the presence of carboxylic acids identified by 1H NMR in the BSC extract aqueous.

https://doi.org/10.1590/1980-5373-mr-2022-0013

Annual Rainfall in Pernambuco, Brazil: Regionalities, Regimes, and Time Trends
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Bezerra, Alan Cezar

; Costa, Sidney Anderson Teixeira da

; Silva, Jhon Lennon Bezerra da

; Araújo, Athos Murilo Queiroz

; Moura, Geber Barbosa de Albuquerque

; Lopes, Pabrício Marcos Oliveira

; Nascimento, Cristina Rodrigues

Revista Brasileira de Meteorologia

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sep 2021, Volume 36 N. 3 Pages 403 - 414

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

Resumo Esse estudo buscou identificar as zonas homogêneas de precipitação anual, o regime e tendências locais de precipitação anual em Pernambuco. Para tanto, foram obtidos os acumulados anuais e sazonais a partir da precipitação mensal de 45 postos pluviométricos em Pernambuco, durante 1987 a 2019. Obteve-se a zonas homogêneas de precipitação baseado na distância euclidiana e critério de Ward. Com as zonas formadas, obteve-se o valor médio anual da zona e feito uma análise da estatística descritiva, análise do regime de precipitação com índice de Anomalia de Chuva e análise de tendência temporal das zonas com teste de Mann-Kendall. Os resultados demonstraram a formação de 3 zonas: 1 (semiárido), 2 (transição) e 3 (litoral), com valores médios de precipitação anual de 562, 1032 e 1812 mm ano-1, respectivamente. O regime de precipitação em zonas homogêneas identificou predomínio de anos secos, nos quais, no período de 1987 a 2019, as zonas 1, 2 e 3 apresentaram 18, 17 e 15 anos considerados secos, respectivamente. Enquanto análise de tendência verificou uma diminuição de precipitação anual na ordem de 48,7 mm para zona 1; 13,2 mm para zona 2 e 204,4 mm na zona 3, mas com estatística não significativa. A análise da sazonalidade demonstrou que a Zona 1 apresentou tendência negativa na primavera (SON) e positiva na Zona 2 no verão (DJF), indicando mudanças na sazonalidade da precipitação.

Abstract This study aimed to identify the homogeneous zones, the regimes, and the local trends for annual and seasonal rainfall in the state of Pernambuco, Brazil. We collected seasonal and annual data on monthly rainfall from 45 weather stations in Pernambuco from 1987 to 2019. The data were organized yearly to identify the homogeneous rainfall zones based on Euclidean distance and Ward's coefficient. The mean annual value of each zone was calculated and the data were subjected to descriptive statistics analysis, analysis of rainfall regime with the Rain Anomaly Index, and time trend analysis using the Mann-Kendall method. The results show three homogeneous rainfall zones: 1 (semiarid), 2 (transition), and 3 (coastal), with mean values for annual rainfall of 562, 1032, and 1812 mm year-1, respectively. The precipitation regime showed the predominance of dry years as zones 1, 2, and 3 exhibited dry periods of 18, 17, and 15 years, respectively. Time trend analysis revealed a decrease in annual rainfall of 48.7 mm for Zone 1, 13.2 mm for Zone 2, and 204.4 mm for Zone 3, without statistical significance. Seasonal analysis demonstrated that Zone 1 presented a negative trend in the spring and a positive trend in Zone 2 in the summer, indicating changes in the rain seasonality.

https://doi.org/10.1590/0102-77863630129 193 downloads

Response letter regarding the article “Femoropatellar Radiographic Alterations in Cases of Anterior Cruciate Ligament Failure”. Rev Bras Ortop 2015;50(1):43–49
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de Vasconcelos, Diego Protásio

; Mozella, Alan de Paula

; Cobra, Hugo Alexandre de Araújo Barros

; de Sousa Filho, Pedro Guilme Teixeira

; Oliveira, Gustavo Cardilo

Revista Brasileira de Ortopedia

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aug 2020, Volume 55 N. 4 Pages 505 - 506

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

https://doi.org/10.1055/s-0039-1700825 251 downloads

Plasma Renin in Women Using and not Using Combined Oral Contraceptive
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Oliveira, Sidney de Souza

; Petto, Jefferson

; Diogo, Diego Passos

; Santos, Alan Carlos Nery dos

; Sacramento, Marvyn de Santana do

; Ladeia, Ana Marice Teixeira

International Journal of Cardiovascular Sciences

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may 2020, Volume 33 N. 3 Pages 208 - 214

Abstract: En | Text: En | PDF: En

Abstract Backgroud: Recent studies show that women on combined oral contraceptives (COC) present abnormal fasting lipid profile, increased postprandial lipemia, plasma C-reactive protein (CRP) and blood pressure (BP) compared to women not on combined oral contraceptives. Plasma renin is one of the factors responsible for abnormal BP. Objectives: To assess plasma renin levels in women using or not using COC, the correlation between renin and CRP, as well as divergences in lipid profile. Methods: A cross-sectional study with apparently healthy women aged 20 to 30, eutrophic, irregularly active, and with fasting triglycerides < 150 mg/dL. The sample was stratified into two groups: the No Combined Oral Contraceptive Group (NCOCG), comprised of women who did not use any type of hormone contraceptive, and the Combined Oral Contraceptive Group (COCG) comprised of women on low-dose COC for at least one year. After a 12-hour fast, 5 ml of blood was collected for renin dosing and PCR. Data were analyzed by the t-Test and bidirectional Mann-Whitney Test, both with significance < 0.05. Results: We evaluated 44 women equally distributed between the groups, age 23 ± 1.2 years, BMI 21.0 ± 3.2 kg/m2. Median and interquartile deviation of renin in the NCOCG and the COCG were, respectively, 0.5 (0.1-1.0) and 3.0 (2-6) (p < 0.01). A positive correlation between PCR and renin (p < 0.01 and r = 0.68) was found. Conclusion: The plasma renin levels of women using COC were higher, with a strong correlation with CRP.

https://doi.org/10.36660/ijcs.20180021 441 downloads

10.

[ARTIGO RETRATADO]Desempenho de ureia revestida com poliuretano como fertilizante de Phaseolus vulgaris L.
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Silva, Edilaine Ferreira da

; Escanio, Camila Alves

; Oliveira, Magno André de

; Bezerra, Augusto Cesar da Silva

; Machado, Alan Rodrigues Teixeira

Matéria (Rio de Janeiro)

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2019, Volume 24 N. 3 elocation 12410

Abstract: Pt | Text: Pt | PDF: Pt

https://doi.org/10.1590/s1517-707620190003.0725 506 downloads

11.

Antioxidant activity and physicochemical characteristics of honeys from the eastern Amazon region, Brazil
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BANDEIRA, Adelene Menezes Portela

; GOMES, Victor Valentim

; VASCONCELOS, Arthur Abinader

; TAUBE, Paulo Sérgio

; BARROS, Emerson Cristi de

; COSTA, Samuel Carvalho

; LIMA, Alan Kelbis Oliveira

; BOLIGON, Aline Augusti

; WACZUK, Emily Pansera

; ROCHA, João Batista Teixeira

Acta Amazonica

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apr 2018, Volume 48 N. 2 Pages 158 - 167

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

RESUMO O mel é um produto natural que apresenta várias propriedades benéficas para a saúde, tais como atividade antinflamatória, antioxidante e antimicrobiana, as quais dependem de sua composição. Neste contexto, as propriedades físico-químicas (cor, pH, conteúdo de cinzas, umidade, açúcares e compostos fenólicos totais) e a atividade antioxidadente (capacidade de remoção do radical DPPH) de méis de abelhas Apis mellifera de Santarém, na principal região de produção de mel na Amazônia Oriental, Brasil, foram avaliadas. A maioria das amostras teve cor escura e apresentaram-se ácidas. Os teores de cinzas e a umidade variaram de 0,112 a 0,318 e de 14,751 a 17,514, respectivamente. O teor de açúcares redutores vairou entre 62,873 e 91,563%. O teor total de compostos fenólicos foi mais elevado que os já reportados na literatura, variando entre 15,22 e 16,51 mg g−1 e 17,70 e 18,94 mg g−1 para amostras de mel protegidas e expostas à radiação UV, respectivamente. A quercetina foi encontrada apenas no mel que foi protegido da luz, com teores variando entre 0,24 e 0,43 mg g−1. A ausência de quercetina nas amostras de mel expostas à luz sugere que a radiação UV pode ter degradado esse composto. Todas as amostras apresentaram máxima capacidade de remover o radical DPPH próxima a 50%. Houve correlação inversa entre a cor e o pH, cinzas, açúcares redutores e teor de umidade, e correlação positiva entre a cor e o teor de composto fenólicos e a atividade antioxidante.

ABSTRACT Honey is a natural product that has several beneficial properties for health, such as anti-inflammatory, antioxidant and antimicrobial activities, which depend on its composition. In this context, physicochemical properties (colour, pH, ash, moisture, sugars, and total phenolic contents) and antioxidant activity (DPPH radical scavenging ability) of Apis mellifera honeys from Santarém, the main honey production area in the eastern Amazon region, were evaluated. Most samples were dark in colour and acidic. The ash and moisture contents ranged from 0.112 to 0.318 and from 14.751 to 17.514, respectively. The reducing sugars content was 62.873-91.563%. The total amount of phenolic compounds was higher than normally reported, ranging between 15.22 and 16.51 mg g−1 and 17.70 and 18.94 mg g−1, for honey after and before exposure to light, respectively. Quercetin was found only in honey that had been protected from light, with values ranging from 0.24 to 0.43 mg g-1. The absence of quercetin in the samples of honey exposed to light suggests that UV radiation has degraded this compound. All samples presented maximum radical scavenging capacity close to 50%. Our results showed inverse correlations between the colour and pH, ash, reducing sugars, and moisture content, and positive correlations between the colour and the concentration of phenolic compounds, and antioxidant activity.

https://doi.org/10.1590/1809-4392201702721 2130 downloads

12.

Desempenho de ureia revestida compoliuretano como fertilizante de Phaseolus vulgaris L.
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Silva, Edilaine Ferreira da

; Escanio, Camila Alves

; Oliveira, Magno André de

; Bezerra, Augusto Cesar da Silva

; Machado, Alan Rodrigues Teixeira

Matéria (Rio de Janeiro)

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2018, Volume 23 N. 4 elocation e12268

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

RESUMO Devido a sua grande importância mundial, a cultura do feijoeiro requer uma produção em grande escala, tornando necessária a utilização de fertilizantes. Dentre eles, a ureia se destaca como um dos mais importantes. No entanto, observam-se perdas significativas do nitrogênio por meio de lixiviação, volatilização e desnitrificação. Para contornar esse problema, vários grupos de pesquisa têm estudado o revestimento de fertilizantes com polímeros, uma vez que, por meio deles, é possível controlar a liberação de nutrientes, bem como a sua disponibilidade no solo. Nesse contexto, o presente trabalho revestiu grânulos de ureia por meio de uma mistura simples de difenilmetano diisocianato e poliol poliéter. Foram produzidos cinco tipos de revestimentos variando as proporções dos reagentes. Todas as amostras foram caracterizadas por espectroscopia de infravermelho e microscopia eletrônica de varredura e foram realizados ensaios in vivo com Phaseolus vulgaris L.. Os espectros de infravermelho confirmaram a polimerização por meio da formação da ligação de uretana. As micrografias evidenciaram um recobrimento com espessura inferior a 30 µm. Os ensaios de liberação controlada da ureia em água mostraram que os revestimentos poliméricos retardam a liberação da ureia em aproximadamente 50 % durante um período de 200 min. Já os ensaios in vivo mostraram que a utilização da ureia com revestimentos nas proporções (em massa) de 60:40 e 50:50 (difenilmetano diisocianato/poliol poliéter) elevaram o teor de massa seca em 52 e 22 %, respectivamente. Com isso, conclui-se que é possível revestir fertilizantes nitrogenados de forma simples com eficiência, otimizando a liberação dos nutrientes no solo e tornando-os mais sustentáveis.

ABSTRACT Due to its great global importance, bean crop requires large-scale production, making necessary the usage of fertilizers. Among them, urea stands out as one of the most important. However, significant losses of nitrogen are constantly observed through leaching, volatilization and denitrification. In order to circumvent this problem, several research groups have studied the coating of fertilizers with polymers, since, through them, it is possible to control the release of nutrients as well as their availability in the soil. In this context, the present work aim son coating urea granules by means of a simple mixture of diphenylmethane diisocyanate and polyol polyether. Five types of coatings have been produced by varying the proportions of the reactants. All samples were characterized by infrared spectroscopy and scanning electron microscopy. In addition, in vivo assays were performed with Phaseolus vulgaris L.. Infrared spectra confirmed the polymerization by formation of the urethane bond. The micrographs showed coating with a thickness of less than 30 μm. Controlled release urea tests in water have shown that the polymer coatings delay release of the urea by approximately 50% over a period of 200 min. The results of the in vivo tests, in turn, showed that the use of urea with coatings in the 60:40 and 50:50 mass proportions (diphenylmethane diisocyanate/polyol polyether) increased the dry mass content in 52 and 22 %, respectively. In this way, it can be concluded that it is possible to coat nitrogen fertilizers simply with efficiency, allowing the release of nutrients into the soil and making it more sustainable.

https://doi.org/10.1590/s1517-707620180004.0602 1342 downloads

13.

Femoropatellar radiographic alterations in cases of anterior cruciate ligament failure
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Vasconcelos, Diego Protásio de

; Mozella, Alan de Paula

; Sousa Filho, Pedro Guilme Teixeira de

; Oliveira, Gustavo Cardilo

; Cobra, Hugo Alexandre de Araújo Barros

Revista Brasileira de Ortopedia

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feb 2015, Volume 50 N. 1 Pages 43 - 49

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

OBJETIVO: análise comparativa de três parâmetros radiográficos femoropatelares entre joelhos com insuficiência crônica do ligamento cruzado anterior (LCA) e joelhos normais.MÉTODOS: foram selecionados 30 pacientes voluntários com diagnóstico de lesão crônica isolada unilateral do LCA havia mais de um ano e joelho contralateral normal. Todos os pacientes foram submetidos a radiografias digitais de ambos os joelhos nas incidências em perfil absoluto a 30° de flexão, com e sem carga monopodal, e axial de patela a 30°. Foram mensurados, nas radiografias obtidas, o índice de altura patelar de Caton-Deschamps, o ângulo de congruência patelar de Merchant e o ângulo de inclinação lateral da patela, descrito por Laurin, nos joelhos normais e nos joelhos com lesão do LCA e foi feita análise comparativa entre esses dois grupos.RESULTADOS: a altura patelar foi inferior, de forma estatisticamente significante (p < 0,001), nos joelhos com insuficiência do LCA em comparação com os joelhos normais, tanto nas radiografias sem carga quanto nas com carga monopodal. O ângulo de congruência patelar de Merchant foi significativamente menor (p < 0,001) nos joelhos normais e o ângulo de inclinação lateral da patela foi inferior (p < 0,001) nos joelhos com insuficiência do LCA.CONCLUSÃO: a insuficiência crônica do LCA alterou de forma estatisticamente significante (p < 0,001) os valores dos parâmetros radiográficos femoropatelares estudados. Joelhos com lesão desse ligamento apresentaram menores valores de altura patelar, maior inclinação e deslocamento laterais da patela em relação à tróclea femoral comparados com os joelhos contralaterais normais.

OBJECTIVE: To make a comparative analysis on three femoropatellar radiographic parameters, between knees with chronic failure of the anterior cruciate ligament (ACL) and normal knees.METHODS: Thirty volunteer patients with a diagnosis of unilateral isolated chronic ACL injury for more than one year and a normal contralateral knee were selected. Digital radiographs were produced for all the patients, on both knees in absolute lateral view at 30° of flexion, with and without load-bearing on one leg, and in axial view of the patella at 30°. The Caton-Deschamps patellar height index, Merchant patellar congruence angle and Laurin lateral patellar tilt angle were measured on the radiographs obtained from the normal knees and knees with ACL injuries, and comparative analysis was performed between these two groups.RESULTS: The patellar height was statistically significantly lower (p< 0.001) in the knees with ACL failure than in the normal knees, both on radiographs without loading and on those with single-foot loading. The Merchant patellar congruence angle was significantly smaller (p < 0.001) in the normal knees and the lateral patellar tilt angle was smaller (p < 0.001) in the knees with ACL failure.CONCLUSION: Chronic ACL failure gave rise to a statistically significant change in the femoropatellar radiographic values studied (p < 0.001). Knees with injuries to this ligament presented lower patellar height values, greater tilt and lateral displacement of the patella, in relation to the femoral trochlea, in comparison with the normal contralateral knees.

https://doi.org/10.1016/j.rboe.2015.01.005 6596 downloads

14.

Antibacterial activity of propolis produced by Frieseomelitta varia
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Campos, Viviane Aparecida Costa

; Santos Júnior, Helvécio Martins dos

; Oliveira, Denilson F

; Carvalho, Hudson Walace Pereira de

; Machado, Alan Rodrigues Teixeira

; Tirelli, Aline Auxiliadora

Ciência e Agrotecnologia

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dec 2011, Volume 35 N. 6 Pages 1043 - 1049

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

Para contribuir para o desenvolvimento de produtos antibacterianos obtidos de própolis produzidos por abelhas nativas do Brasil, 29 tipos de própolis coletados de diferentes colméias no Estado de Minas Gerais, Brasil, foram avaliados quanto à atividade in vitro contra Aeromonas hydrophila, Bacillus subtilis, Pseudomonas aeruginosa, e Staphylococcus aureus. Dentre as amostras de abelhas nativas, somente a de Frieseomelitta varia (Lepeletier, 1836) inibiu, em teste in vitro, o crescimento bacteriano. Consequentemente, essa própolis foi submetida a métodos cromatográficos para o fracionamento biomonitorado por teste de difusão em Agar com as referidas bactérias, o que resultou no isolamento e identificação do ácido 3,5-diprenil-4-hidroxicinâmico (artepelin C), que apresentou CIM de 62,5 e 250 µg/mL frente a B. subtilis e S. aureus, respectivamente. Esses resultados indicam o potencial de F. varia para a produção de própolis terapêutica.

To contribute to the development of antibacterial products from propolis produced by native Brazilian bees, twenty-nine samples of propolis collected from hives in the state of Minas Gerais, Brazil, were screened for in vitro activity against Aeromonas hydrophila, Bacillus subtilis, Pseudomonas aeruginosa, and Staphylococcus aureus. Among the samples from native Brazilian bees, only that from Frieseomelitta varia (Lepeletier, 1836) inhibited in vitro bacterial growth. Consequently, this propolis underwent fractionation by chromatographic methods monitored through Agar-diffusion assays with these bacteria, which resulted in the isolation and identification of 3,5-diprenyl-4-hydroxycinnamic acid (artepillin C), which showed MIC of 62.5 and 250 µg/mL against B. subtilis and S. aureus, respectively. This result indicates the potential of F. varia to produce therapeutic propolis.

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15.

Impairment no setor público: particularidades das normas nacionais e internacionais
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Carvalho, Luiz Nelson Guedes de

; Costa, Patrícia de Souza

; Oliveira, Alan Teixeira de

Revista de Administração Pública

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aug 2010, Volume 44 N. 4 Pages 839 - 876

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

O impairment no setor público tem sido pouco discutido no meio acadêmico. Os órgãos normatizadores têm publicado pronunciamentos sobre o assunto, enquanto muitas dúvidas surgem e permanecem sem resposta. Diante disso, este artigo analisa as particularidades de normas nacionais e internacionais balizadoras do impairment no setor público: o Gasb 42, os Ipsas 21 e 26 e a NBC T 16.10. Foram analisados aspectos relacionados ao conceito de impairment, à periodicidade de aplicação do teste, para quais ativos deve ser aplicado e o processo de reconhecimento, mensuração e evidenciação da perda por impairment. As principais divergências entre os pronunciamentos são: o Gasb 42 está baseado em princípios e não em regras; os critérios utilizados pelo Gasb 42 para cálculo do fair value são semelhantes àqueles usados pelos Ipsas 21 e 26 para cálculo do valor em uso; o valor de reposição é usado para cálculo do fair value no Gasb 42 e o valor de saída nos Ipsas; apenas o Ipsas 26 utiliza a figura da unidade geradora de caixa; o Gasb 42 não admite a reversão da perda por impairment e os Ipsas não se aplicam a bens reavaliados. Apesar da NBC T 16.10 já estar em vigor no Brasil, todos os ativos públicos e a depreciação precisam ser reconhecidos e mensurados antes da aplicação dessa norma

Little discussion on impairment in the public sector has occurred in the academic context. Standardizing bodies have published pronouncements on this issue, but many doubts arise and remain unanswered. This article analyzes the particularities of Brazilian and international standards guiding impairment in the public sector: Gasb 42, Ipsas 21 and 26 and NBC T 16.10. The aspects analyzed were related to the impairment concept, the periodicity of applying the test, what assets it should be applied to and the recognition, measurement and disclosure process of impairment loss. The main divergences between the pronouncements are: Gasb 42 is based on principles instead of rules; the criteria Gasb 42 uses to calculate the fair value are similar to the criteria Ipsas 21 and 26 use to calculate the value in use; the replacement cost is used to calculate fair value in Gasb 42 and the outflow value in both Ipsas; only Ipsas 26 uses the figure of cash-generating unit; Gasb 42 does not permit the reversal of impairment loss and the Ipsas do not apply to revalued goods. Although NBC T 16.10 is already in force in Brazil, all public assets and depreciation need to be recognized and measured before this standard is applied

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