Search | SciELO

The use of microalgae cultures to process effluents from industries, leachates, and tanneries, among others, quantified by the reduction of metallic materials in the medium and the reduction of chemical oxygen demand (COD), helps reduce the environmental impact caused by human development. In addition, with the growth of the culture, it is possible to produce a significant amount of chlorophyll, a carotenoid of high value in the cosmetics and food industries that are used as a natural pigment. In this context, this work presents a study conducted to verify the bioremediation and chlorophyll production potential of the cultivation of the microalgae Chlorella minutíssima, using the Taguchi method. The microalgae Chlorella minutissima has given good results in the bioremediation of leachate, as a mean reduction of 33% in COD was obtained, as well as a 92% reduction in the toxic components. In addition, statistical analysis revealed that the four process factors were significant factors for chlorophyll a, chlorophyll b and carotenoid productivity (p < 0.05). Finally, it was observed that the maximum chlorophyll a (111.9 ± 0.8 mg-L-1-d-1), chlorophyll b (66.1 ± 1.7 mg-L-1-d-1), and carotenoid (31.9 ± 0.03 mg-L-1-d-1) values obtained occurred in Experiment 8, which is closer to the ideal conditions identified by statistical analysis, revealing the effectiveness of the use of the Taguchi method for the design of experiments.

https://doi.org/10.17159/wsa/2023.v49.i4.4027

Phenolic composition of jussara (Euterpe edulisMartius) from Minas Gerais and Espírito Santo, Brazil, determined by high performance liquid chromatography coupled to diode array detection and electrospray ionization tandem mass spectrometry (HPLC-DAD-ESI-MS)
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Dadalto, Carolina Tatagiba da Rocha

; Hermosín-Gutiérrez, Isidro

; Pérez-Navarro, José

; Ojeda-Amador, Rosa Maria

; Gómez-Alonso, Sergio

; Stringheta, Paulo César

; Paula, Daniele de Almeida

; Pinto, Marcos Roberto Moacir Ribeiro

; Ramos, Afonso Mota

Ciência Rural

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2023, Volume 53 N. 7 elocation e20210900

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

RESUMO: O objetivo desta pesquisa foi avaliar a composição fenólica da polpa de Jussara dos Estados brasileiros de Minas Gerais (MG) e Espírito Santo (ES) usando HPLC-DAD-MS / MS. Dezessete antocianinas foram detectadas, dentre elas, derivadas de cianidina, pelargonidina e peonidina. Dentre os compostos fenólicos não antociânicos, foram identificados flavonóis (derivados de caempferol, quercetina e isorhamnetina), flavan-3-ols (catequina, epicatequina, procianidinas do tipo B e dímeros desconhecidos) e resveratrol em sua forma glicosilada. Catequina (32,41-60,56 mg 100g-1) e epicatequina (18,86-40,92 mg 100g-1) foram os principais flavan-3-óis presentes nas frutas. As amostras apresentaram pequenas concentrações de glicosídeos resveratrol (0,02-0,91 mg 100g-1). A metodologia analítica utilizada (HPLC-DAD-ESI-MS / MS) permitiu a identificação de novos compostos relatados presentes na composição da polpa de Jussara.

ABSTRACT: This research assessed the phenolic composition of Jussara pulp from the Brazilian states of Minas Gerais (MG) and Espírito Santo (ES) using HPLC-DAD-MS/MS. Seventeen anthocyanins were detected in fruits, derived from cyanidin, pelargonidin and peonidin. Among the non-anthocyanic phenolic compounds, flavonols (kaempferol, quercetin and isorhamnetin derivatives), flavan-3-ols (catechin, epicatechin, B-type procyanidins and unknown dimers) and resveratrol in its glycosylated form have been identified. Catechin (32.41-60.56 mg 100g-1) and epicatechin (18.86-40.92 mg 100g-1) were the main flavan-3-ols present in the fruits. The samples showed small concentrations of resveratrol glycosides (0.02-0.91 mg 100g-1). The analytical methodology used (HPLC-DAD-ESI-MS/MS) permitted the identification of newly reported compounds in this fruit.

https://doi.org/10.1590/0103-8478cr20210900

Saprochaete clavata invasive infection: characterization, antifungal susceptibility, and biofilm evaluation of a rare yeast isolated in Brazil
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Kraft, Letícia

; Ribeiro, Victoria Stadler Tasca

; Petroski, Luiz Pedro

; Herai, Roberto Hirochi

; Peronni, Kamila Chagas

; Figueiredo, David Livingstone Alves

; Motta, Fábio Araujo

; Tuon, Felipe Francisco

Revista do Instituto de Medicina Tropical de São Paulo

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2023, Volume 65 elocation e12

Abstract: En | Text: En | PDF: En

ABSTRACT Rare emerging pathogens such as Saprochaete clavata are associated with invasive fungal diseases, high morbidity, mortality, rapidly fatal infections, and outbreaks. However, little is known about S. clavata infections, epidemiology, risk factors, treatment, biofilms, and disease outcomes. The objective of this study was to describe a new case of severe S. clavata infection in a patient diagnosed at a referral children’s hospital in Brazil, including antifungal minimal inhibitory concentration, S. clavata biofilm characterization, and molecular characterization. The S. clavata isolated from an immunocompromised 11-year-old male patient was characterized using MALDI-TOF, Gram staining, scanning electron microscopy (SEM), and next generation sequencing (NGS) of genomic DNA. Biofilm production was also evaluated in parallel with determining minimal inhibitory concentration (MIC) and biofilm sensitivity to antifungal treatment. We observed small to medium, whitish, farinose, dry, filamentous margin colonies, yeast-like cells with bacillary features, and biofilm formation. The MALDI-TOF system yielded a score of ≥ 2,000, while NGS confirmed S. clavata presence at the nucleotide level. The MIC values (in mg L-1) for tested drugs were as follows: fluconazole = 2, voriconazole ≤ 2, caspofungin ≥ 8, micafungin = 2, amphotericin B = 4, flucytosine ≤ 1, and anidulafungin = 1. Amphotericin B can be active against S. clavata biofilm and the fungus can be susceptible to new azoles. These findings were helpful for understanding the development of novel treatments for S. clavata-induced disease, including combined therapy for biofilm-associated infections.

https://doi.org/10.1590/s1678-9946202365012

Functional properties and chemical profile of aged carioca beans and cooked under thesteam of autoclave
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Bento, Juliana Aparecida Correia

; Ribeiro, Paulo Riceli Vasconcelos

; Bassinello, Priscila Zaczuk

; Souza Neto, Menandes Alves de

; Carvalho, Rosângela Nunes

; Brito, Edy Sousa de

; Caliari, Márcio

; Júnior, Manoel Soares Soares

Ciência Rural

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2023, Volume 53 N. 9 elocation e20220342

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

ABSTRACT: This study evaluated the changes caused by cooking presoaked aged carioca beans in the autoclave steam, focusing on its bioactive components, antioxidant activity, and nutritional compounds. Additionally, to identify which carioca bean cultivar could preserve the most quantity of bioactive compounds in cooked flour. The cooked flours from Imperador had the highest antioxidant activity (DDPH: 10.58 µmolTrolox·g-1, ABTS: 18.71 µmolTrolox·g-1), anthocyanins (8.08 µg·g-1), and total phenolic content (TPC) (36.69 mg·g-1). The cultivar Gol also retained part of these compounds after cooking. The phenolic and saponin profiles of cooked flours revealed a reduction in phenolic compounds such as catechin, epicatechin, and kaempferol and an increase in soyasaponin-Ba and Bb. The samples Notavel, Dama, and Madreperola, presented the highest amount of soyasaponin-A0. Thus, the cooked flours from Imperador and Gol stood out due to their retention of part of their bioactive compounds, such as polyphenols and group B saponins.

RESUMO: Este estudo avalia as alterações causadas pelo cozimento do feijão carioca, envelhecido e pré-embebido, no vapor da autoclave, com foco em seus componentes bioativos, atividade antioxidante e compostos nutricionais. Além disso, identifica qual cultivar de feijão carioca preserva a maior quantidade de compostos bioativos na farinha de feijão cozida. As farinhas cozidas do Imperador apresentaram a maior atividade antioxidante (DDPH: 10.58 µmolTrolox·g-1, ABTS: 18.71 µmolTrolox·g-1), antocianinas (8.08 µg·g-1) e fenólicos totais (TPC) (36.69 mg·g-1). A cultivar Gol também reteve parte desses compostos após o cozimento. Os perfis fenólicos e saponínicos das farinhas cozidas revelaram redução de compostos fenólicos, como a catequina, epi-catequina e kaempferol e aumento de soyasaponin-Ba e Bb. As amostras Notável, Dama e Madrepérola, apresentaram a maior quantidade de sojasaponina-A0. Assim, as farinhas cozidas do Imperador e Gol se destacaram pela retenção de parte de seus compostos bioativos, como polifenóis e saponinas do grupo B.

https://doi.org/10.1590/0103-8478cr20220342

Lesão Miocárdica e Prognóstico em Pacientes Hospitalizados com COVID-19 no Brasil: Resultados do Registro Nacional de COVID-19
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Barbosa, Hannah Cardoso

; Martins, Maria Auxiliadora Parreiras

; Jesus, Jordana Cristina de

; Meira, Karina Cardoso

; Passaglia, Luiz Guilherme

; Sacioto, Manuela Furtado

; Bezerra, Adriana Falangola Benjamin

; Schwarzbold, Alexandre Vargas

; Maurílio, Amanda de Oliveira

; Farace, Barbara Lopes

; Silva, Carla Thais Cândida Alves da

; Cimini, Christiane Corrêa Rodrigues

; Silveira, Daniel Vitorio

; Carazai, Daniela do Reis

; Ponce, Daniela

; Costa, Emanuel Victor Alves

; Manenti, Euler Roberto Fernandes

; Cenci, Evelin Paola de Almeida

; Bartolazzi, Frederico

; Madeira, Glícia Cristina de Castro

; Nascimento, Guilherme Fagundes

; Velloso, Isabela Vasconcellos Pires

; Batista, Joanna d’Arc Lyra

; Morais, Júlia Drumond Parreiras de

; Carvalho, Juliana da Silva Nogueira

; Ruschel, Karen Brasil

; Martins, Karina Paula Medeiros Prado

; Zandoná, Liege Barella

; Menezes, Luanna Silva Monteiro

; Kopittke, Luciane

; Castro, Luís César de

; Nasi, Luiz Antônio

; Floriani, Maiara Anschau

; Souza, Maíra Dias

; Carneiro, Marcelo

; Bicalho, Maria Aparecida Camargos

; Lima, Maria Clara Pontello Barbosa

; Godoy, Mariana Frizzo de

; Guimarães-Júnior, Milton Henriques

; Mendes, Paulo Mascarenhas

; Delfino-Pereira, Polianna

; Ribeiro, Raquel Jaqueline Eder

; Finger, Renan Goulart

; Menezes, Rochele Mosmann

; Francisco, Saionara Cristina

; Araújo, Silvia Ferreira

; Oliveira, Talita Fischer

; Oliveira, Thainara Conceição de

; Polanczyk, Carisi Anne

; Marcolino, Milena Soriano

Arquivos Brasileiros de Cardiologia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2023, Volume 120 N. 2 elocation e20220151

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

Abstract Background Cardiovascular complications of COVID-19 are important aspects of the disease’s pathogenesis and prognosis. Evidence on the prognostic role of troponin and myocardial injury in Latin American hospitalized COVID-19 patients is still scarce. Objectives To evaluate myocardial injury as independent predictor of in-hospital mortality and invasive mechanical ventilation support in hospitalized patients, from the Brazilian COVID-19 Registry. Methods This cohort study is a substudy of the Brazilian COVID-19 Registry, conducted in 31 Brazilian hospitals of 17 cities, March-September 2020. Primary outcomes included in-hospital mortality and invasive mechanical ventilation support. Models for the primary outcomes were estimated by Poisson regression with robust variance, with statistical significance of p<0.05. Results Of 2,925 patients (median age of 60 years [48-71], 57.1% men), 27.3% presented myocardial injury. The proportion of patients with comorbidities was higher among patients with cardiac injury (median 2 [1-2] vs. 1 [0-2]). Patients with myocardial injury had higher median levels of brain natriuretic peptide, lactate dehydrogenase, creatine phosphokinase, N-terminal pro-brain natriuretic peptide, and C-reactive protein than patients without myocardial injury. As independent predictors, C-reactive protein and platelet counts were related to the risk of death, and neutrophils and platelet counts were related to the risk of invasive mechanical ventilation support. Patients with high troponin levels presented a higher risk of death (RR 2.03, 95% CI 1.60-2.58) and invasive mechanical ventilation support (RR 1.87, 95% CI 1.57-2.23), when compared to those with normal troponin levels. Conclusion Cardiac injury was an independent predictor of in-hospital mortality and the need for invasive mechanical ventilation support in hospitalized COVID-19 patients.

Resumo Fundamento As complicações cardiovasculares da COVID-19 são aspectos importantes da patogênese e do prognóstico da doença. Evidências do papel prognóstico da troponina e da lesão miocárdica em pacientes hospitalizados com COVID-19 na América Latina são ainda escassos. Objetivos Avaliar a lesão miocárdica como preditor independente de mortalidade hospitalar e suporte ventilatório mecânico em pacientes hospitalizados, do registro brasileiro de COVID-19. Métodos Este estudo coorte é um subestudo do registro brasileiro de COVID-19, conduzido em 31 hospitais brasileiros de 17 cidades, de março a setembro de 2020. Os desfechos primários incluíram mortalidade hospitalar e suporte ventilatório mecânico invasivo. Os modelos para os desfechos primários foram estimados por regressão de Poisson com variância robusta, com significância estatística de p<0,05. Resultados Dos 2925 pacientes [idade mediana de 60 anos (48-71), 57,1%], 27,3% apresentaram lesão miocárdica. A proporção de pacientes com comorbidades foi maior nos pacientes com lesão miocárdica [mediana 2 (1-2) vs. 1 (0-20)]. Os pacientes com lesão miocárdica apresentaram maiores valores medianos de peptídeo natriurético cerebral, lactato desidrogenase, creatina fosfoquinase, N-terminal do pró-peptídeo natriurético tipo B e proteína C reativa em comparação a pacientes sem lesão miocárdica. Como fatores independentes, proteína C reativa e contagem de plaquetas foram relacionados com o risco de morte, e neutrófilos e contagem de plaquetas foram relacionados ao risco de suporte ventilatório mecânico invasivo. Os pacientes com níveis elevados de troponina apresentaram um maior risco de morte (RR 2,03, IC95% 1,60-2,58) e suporte ventilatório mecânico (RR 1,87;IC95% 1,57-2,23), em comparação àqueles com níveis de troponina normais. Conclusão Lesão cardíaca foi um preditor independente de mortalidade hospitalar e necessidade de suporte ventilatório mecânico em pacientes hospitalizados com COVID-19.

https://doi.org/10.36660/abc.20220151

Brazilian guidelines for the pharmacological treatment of the pulmonary symptoms of cystic fibrosis. Official document of the Sociedade Brasileira de Pneumologia e Tisiologia (SBPT, Brazilian Thoracic Association)
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Athanazio, Rodrigo Abensur

; Tanni, Suzana Erico

; Ferreira, Juliana

; Dalcin, Paulo de Tarso Roth

; Fuccio, Marcelo B de

; Esposito, Concetta

; Canan, Mariane Gonçalves Martynychen

; Coelho, Liana Sousa

; Firmida, Mônica de Cássia

; Almeida, Marina Buarque de

; Marostica, Paulo José Cauduro

; Monte, Luciana de Freitas Velloso

; Souza, Edna Lúcia

; Pinto, Leonardo Araujo

; Rached, Samia Zahi

; Oliveira, Verônica Stasiak Bednarczuk de

; Riedi, Carlos Antonio

; Silva Filho, Luiz Vicente Ribeiro Ferreira da

Jornal Brasileiro de Pneumologia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2023, Volume 49 N. 2 elocation e20230040

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

ABSTRACT Cystic fibrosis (CF) is a genetic disease that results in dysfunction of the CF transmembrane conductance regulator (CFTR) protein, which is a chloride and bicarbonate channel expressed in the apical portion of epithelial cells of various organs. Dysfunction of that protein results in diverse clinical manifestations, primarily involving the respiratory and gastrointestinal systems, impairing quality of life and reducing life expectancy. Although CF is still an incurable pathology, the therapeutic and prognostic perspectives are now totally different and much more favorable. The purpose of these guidelines is to define evidence-based recommendations regarding the use of pharmacological agents in the treatment of the pulmonary symptoms of CF in Brazil. Questions in the Patients of interest, Intervention to be studied, Comparison of interventions, and Outcome of interest (PICO) format were employed to address aspects related to the use of modulators of this protein (ivacaftor, lumacaftor+ivacaftor, and tezacaftor+ivacaftor), use of dornase alfa, eradication therapy and chronic suppression of Pseudomonas aeruginosa, and eradication of methicillin-resistant Staphylococcus aureus and Burkholderia cepacia complex. To formulate the PICO questions, a group of Brazilian specialists was assembled and a systematic review was carried out on the themes, with meta-analysis when applicable. The results obtained were analyzed in terms of the strength of the evidence compiled, the recommendations being devised by employing the GRADE approach. We believe that these guidelines represent a major advance to be incorporated into the approach to patients with CF, mainly aiming to favor the management of the disease, and could become an auxiliary tool in the definition of public policies related to CF.

RESUMO A fibrose cística (FC) é uma doença genética que resulta em disfunção da proteína reguladora de condutância transmembrana da FC (CFTR), que é um canal de cloro e bicarbonato expresso na porção apical de células epiteliais de diversos órgãos. A disfunção dessa proteína resulta em manifestações clínicas diversas, envolvendo primariamente os sistemas respiratório e gastrointestinal com redução da qualidade e expectativa de vida. A FC ainda é uma patologia incurável, porém o horizonte terapêutico e prognóstico é hoje totalmente distinto e muito mais favorável. O objetivo destas diretrizes foi definir recomendações brasileiras baseadas em evidências em relação ao emprego de agentes farmacológicos no tratamento pulmonar da FC. As perguntas PICO (acrônimo baseado em perguntas referentes aos Pacientes de interesse, Intervenção a ser estudada, Comparação da intervenção e Outcome [desfecho] de interesse) abordaram aspectos relativos ao uso de moduladores de CFTR (ivacaftor, lumacaftor + ivacaftor e tezacaftor + ivacaftor), uso de dornase alfa, terapia de erradicação e supressão crônica de Pseudomonas aeruginosa, e erradicação de Staphylococcus aureus resistente a meticilina e do complexo Burkholderia cepacia. Para a formulação das perguntas, um grupo de especialistas brasileiros foi reunido e realizou-se uma revisão sistemática sobre os temas, com meta-análise quando aplicável. Os resultados encontrados foram analisados quanto à força das evidências compiladas, sendo concebidas recomendações seguindo a metodologia GRADE. Os autores acreditam que o presente documento represente um importante avanço a ser incorporado na abordagem de pacientes com FC, objetivando principalmente favorecer seu manejo, podendo se tornar uma ferramenta auxiliar na definição de políticas públicas relacionadas à FC.

https://doi.org/10.36416/1806-3756/e20230040

Rhinoviruses as critical agents in severe bronchiolitis in infants
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Bastos, Juliana Cristina Santiago

; Simas, Paulo Vitor Marques

; Caserta, Leonardo Cardia

; Bragunde, Alfonso Eduardo Alvarez

; Marson, Fernando Augusto de Lima

; Martini, Matheus Cavalheiro

; Padilla, Marina Aiello

; Ribeiro, José Dirceu

; Santos, Márcia Mercês Aparecida Bianchi dos

; Arns, Clarice Weis

Jornal de Pediatria

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jul 2022, Volume 98 N. 4 Pages 362 - 368

Abstract: En | Text: En | PDF: En

Abstract Objectives: To detect RSV or other thirteen respiratory viruses as possible causer agent of bronchiolitis in infants. Method: This is an epidemiological analytical study, conducted using a nasopharyngeal aspirate of 173 hospitalized children younger than two years old with severe bronchiolitis in three hospitals in the Campinas Metropolitan Region (CMR) during 2013-14. The data was statically evaluated by Pearson’s chi-squared test with statistical significance of 0.05 and 95% confidence level. Results: As expected, the most prevalent viruses detected were RSV A and B in 47% and 16% of the samples, respectively. However, almost a third of severe bronchiolitis cases there were no detection of RSV, and the viruses more commonly detected were rhinoviruses, which were identified in almost a quarter of all positive samples for at least a viral agent. Conclusions: Although nothing could be concluded from the disease severity and clinicalepidemiological data, the present study’s results indicate that severe bronchiolitis is not always related to RSV infections in children younger than two years old, and the rhinoviruses were more prevalent in these cases. These findings reinforce the need to carry out a

https://doi.org/10.1016/j.jped.2021.11.006

Exuberant case of verrucous cutaneous leishmaniasis
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Novaes, Jana Regis

; Daltro, Luise Ribeiro

; Ferreira, Thiago Amparo

; Machado, Paulo Roberto Lima

Anais Brasileiros de Dermatologia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

feb 2022, Volume 97 N. 1 Pages 89 - 92

Abstract: En | Text: En | PDF: En

Abstract Cutaneous leishmaniasis represents a public health problem that affects 85 countries. It is an endemic disease in Brazil, having an important socioeconomic impact. An exuberant case of cutaneous leishmaniasis is reported herein. A 28-year-old male patient with Down syndrome had had verrucous plaques on the back for over a year, with progressive growth. PCR of a lesion sample was positive for Leishmania braziliensis. The patient’s condition was classified as atypical cutaneous leishmaniasis. He was successfully treated with amphotericin B and miltefosine. The treatment remains a challenge, given the toxicity and low cure rate of the currently recommended drugs.

https://doi.org/10.1016/j.abd.2020.11.011

Atividade inibitória de pesticidas piretroides sobre a glutationa S-transferase
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Ribeiro, Eliane B

; Badea, Mihaela

; Ribeiro, Danilo B

; Costa, Andressa R. C

; Santos, Djanira R. dos

; Marques, Paulo R. B. O

; Nunes, Gilvanda S

Química Nova

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2022, Volume 45 N. 2 Pages 138 - 144

Abstract: Pt | Text: Pt | PDF: Pt

Glutathione S-transferase (GST) is one of the enzymes used to evaluate the effects caused by environmental contaminants. The aim of this work was to study the effects of four pyrethroid compounds (allethrin, cypermethrin, deltamethrin and fenpropathrin) on the catalytic activity of GST and to estimate the potential for environmental contamination in silico of these insecticides. Spectrophotometric analyses showed that the activity of the GST enzyme was inhibited by the four pesticides, with the values for the inhibition constant (Ki) varying from 0.12 to 20 µmol L-1, with the following order of inhibition from the highest to the lowest Ki value: deltamethrin > cypermethrin > allethrin > fenpropathrin. They presented a competitive and non-competitive inhibition mechanism depending on the compound. The IC50 values (concentration that inhibits 50% of the enzyme activity) showed the insecticide deltamethrin with greater inhibitory capacity, since it reduced the activity of the GST enzyme by half, even though it was in a lower concentration in relation to the other analyzed compounds. The in silico evaluation indicated the possibility of most of the insecticides contaminating the surface waters (rivers and lakes) adhered to the suspended sediment, but did not show any potential for contamination of groundwater through leaching.

https://doi.org/10.21577/0100-4042.20170804

10.

DNMT3B (rs2424913) polymorphism is associated with systemic lupus erythematosus alone and with co-existing periodontitis in a Brazilian population
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Dias, Larissa Nadine da Silva

; Coêlho, Marina de Castro

; Persuhn, Darlene Camati

; Ribeiro, Isabella Lima Arrais

; Freire, Eutilia Andrade Medeiros

; Oliveira, Naila Francis Paulo de

; Aquino, Sabrina Garcia de

Journal of Applied Oral Science

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2022, Volume 30 elocation e20210567

Abstract: En | Text: En | PDF: En

Abstract The association between Periodontitis and Systemic Lupus Erythematosus (SLE) has been primarily based on their similar pathophysiology and both are associated with genetic polymorphisms. Objectives: To investigate an association between the methylation-related gene polymorphisms DNMT3B (rs2424913) and MTHFR (rs1801133) to Systemic Lupus Erythematosus (SLE) and Periodontitis. Methodology: In total, 196 individuals of all genders aged 24 to 60 years old were allocated into four groups based on their systemic and periodontal status, namely: Healthy control (n=60), periodontitis (n=51), SLE (n=47), and SLE + periodontitis (n=38). Individuals with SLE were stratified according to disease activity (SLEDAI) in inactive or active. We performed polymorphism analysis using PCR-RFLP with genomic DNA from mouthwash. We analyzed data using Fisher’s Exact, Chi-square test, and regression models. Results: Periodontal status were similar in subjects with periodontitis alone and combined with SLE. SLE patients with periodontitis had a longer SLE diagnosis than SLE only (p=0.001). For DNMT3 B polymorphism, the periodontitis, SLE, and Inactive SLE + periodontitis groups showed a higher frequency of T allele and TT genotypes compared to healthy controls (p<0.05). Regression analyses showed that the TT genotype is a strong risk factor for periodontitis (OR=4.53; CI95%=1.13–18.05) and also for SLE without periodontitis (OR=11.57; CI95%=3.12–42.84) and SLE with periodontitis (OR=5.27; CI95%=1.25–22.11) when compared to control. Conclusion: SLE patients with periodontitis had a longer length of SLE diagnosis. The DNMT3B (rs2424913) polymorphism was associated with periodontitis and SLE alone or combined with periodontitis. Our study contributes to understanding the genetic mechanisms involved in periodontitis and SLE susceptibility.

https://doi.org/10.1590/1678-7757-2021-0567

11.

Serological and molecular characterization of hepatitis B virus infection in chronic kidney disease patients from Rio de Janeiro, Brazil
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Villar, Livia Melo

; Fraga, Ketlyn Araujo

; Mendonça, Ana Carolina da Fonseca

; Miguel, Juliana Custódio

; Silva, Elisangela Ferreira da

; Barbosa, Jakeline Ribeiro

; Sousa, Paulo Sérgio Fonseca de

; Lewis-Ximenez, Lia Laura

; Mello, Francisco Campello do Amaral

Brazilian Journal of Infectious Diseases

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2022, Volume 26 N. 3 elocation 102371

Abstract: En | Text: En | PDF: En

ABSTRACT Chronic kidney disease (CKD) patients undergoing hemodialysis (HD) are more vulnerable to blood-borne viral infections due to frequent invasive procedures. Hepatitis B virus (HBV) infection in this cohort of patients has been a matter of concern worldwide. The objective of this cross-sectional study was to evaluate the frequency of serological markers for hepatitis B, and the occurrence of overt and occult HBV infection (OBI) and its molecular characterization in serum samples from 644 CKD patients in HD units located in Rio de Janeiro, Brazil, from 2013 to 2017. HBV DNA was investigated in HBsAg reactive and “anti-HBc alone” samples to determine infecting genotypes and genetic relatedness between sequences. The prevalence of serological markers HBsAg+, anti-HBc alone, anti-HBc+/anti-HBs+, anti-HBs+, anti-HBc/anti-HBs/HBsAg were 5.9%, 2.8%, 30.7%, 26.6%, 34.0%, respectively. HBV DNA was detected in 39.5% (15/38) of the HBsAg+ and in 5/18 (27.8%) of the “anti-HBc alone” individuals, indicating a high prevalence of OBI within this group. We found a higher prevalence of HBV/A1 (65%), followed by HBV/D3 (20%), and HBV/A2 (15%). Bayesian MCC tree with a highly supported clade, genetic distance comparison, and identical nucleotide sequences suggested a nosocomial spread of HBV in some units. The high prevalence of HBV infection and low number of individuals immune to infection reinforces the need for vaccination in this group. The presence of closely related strains in the same HD unit reinforces the importance of continuous improvement of safety control measures and laboratory surveillance of serological markers to prevent the risk of infection and transmission of HBV.

https://doi.org/10.1016/j.bjid.2022.102371

12.

Nonlinear models for soil moisture sensor calibration in tropical mountainous soils
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Silva, Bárbara Pereira Christofaro

; Tassinari, Diego

; Silva, Marx Leandro Naves

; Silva, Bruno Montoani

; Curi, Nilton

; Rocha, Humberto Ribeiro da

Scientia Agricola

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2022, Volume 79 N. 4 elocation e20200253

Abstract: En | Text: En | PDF: En

ABSTRACT Electromagnetic sensors are widely used to monitor soil water content (θ); however, site-specific calibrations are necessary for accurate measurements. This study compares regression models used for calibration of soil moisture sensors and investigates the relation between soil attributes and the adjusted parameters of the specific calibration equations. Undisturbed soil samples were collected in the A and B horizons of two Ultisols and two Inceptisols from the Mantiqueira Range in Southeastern Brazil. After saturation, the Theta Probe ML2X was used to obtain the soil dielectric constant (ε). Several readings were made, ranging from saturation to oven-dry. After each reading, the samples were weighted to calculate θ (m3 m–3). Fourteen regression models (linear, linearized, and nonlinear) were adjusted to the calibration data and checked for their residue distribution. Only the exponential model with three parameters met the regression assumptions regarding residue distribution. The stepwise regression was used to obtain multiple linear equations to estimate the adjusted parameters of the calibration model from soil attributes, with silt and clay contents providing the best relations. Both the specific and the general calibrations performed well, with RMSE values of 0.02 and 0.03 m3 m–3, respectively. Manufacturer calibration and equations from the literature were much less accurate, reinforcing the need to develop specific calibrations.

https://doi.org/10.1590/1678-992x-2020-0253 191 downloads

13.

Logistical transportation routes optimization for Brazilian soybean: an application of the origin-destination matrix
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Oliveira, Andréa Leda Ramos de

; Filassi, Monique

; Lopes, Bruna Fernanda Ribeiro

; Marsola, Karina Braga

Ciência Rural

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2021, Volume 51 N. 2 elocation e20190786

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

RESUMO: A última fronteira agrícola brasileira conhecida como MATOPIBA, acrônimo de Maranhão, Tocantins, Piauí e Bahia, é uma região que vem se destacando no cenário da agricultura moderna de grande escala e intensiva em capital e tecnologia. No entanto, entraves relacionados ao sistema de transporte, principalmente com relação aos altos custos logísticos, vêm impactando negativamente esse setor. Para otimizar o desempenho dessa cadeia foi desenvolvido um modelo de minimização dos custos de transporte, operacionalizado por programação linear sob a forma de uma matriz origem-destino. A proposta deste trabalho é avaliar se a utilização da Ferrovia Norte-Sul apresenta potencial como nova rota intermodal alternativa para a exportação da soja da região do MATOPIBA, afim de minimizar o custo com transporte e promover a viabilidade de novos portos localizados na região Nordeste do país. Esta configuração também pode contribuir para reduzir a sobrecarga do Porto de Santos (SP). Dois cenários foram propostos com base na safra 2016/17, onde o primeiro cenário (A) foi composto apenas por rotas rodoviárias, enquanto o segundo (B), além dessas rotas foram incorporadas as rotas intermodais rodoferroviária e rodohidroviária. Como resultado, o custo total de transporte teve uma redução de 30% no cenário B, e cerca da metade de toda a carga foi escoada pela nova rota intermodal rodoferroviária com destino ao Porto de Itaqui na região Nordeste. Esta configuração promove uma logística de distribuição mais sustentável para a soja, com uso mais racional dos modais de transporte e a descentralização dos investimentos para outras regiões.

ABSTRACT: The last Brazilian agricultural frontier known as MATOPIBA, an acronym for the states of Maranhão, Tocantins, Piaui and Bahia, is a region that has stood out in the scenario of modern large-scale agriculture intensive in capital and technology. However, barriers related to the transportation system, especially regarding the high logistics costs, have been negatively impacting this sector. To optimize the performance of this chain, a model for minimizing transportation costs was developed, using linear programming with an origin-destination matrix. The purpose of this paper was to evaluate whether the use of the North-South Railroad has potential as a new alternative intermodal route for soybean export from the MATOPIBA region, in order to minimize the transportation costs and promote the viability of new ports located in the northeast region of the country. This configuration can also contribute to reduce the overload of Santos Port (SP). Two scenarios were proposed based on the 2016/17 harvest of soybeanwhere the first scenario (A) consisted only of road routes, while the second (B), in addition to these routes, incorporated road-rail and road-water way intermodal routes. As a result, total transportation cost was reduced by 30% in scenario B and about half of all cargo was shipped by the new intermodal road-rail route to the Itaqui Port in the Northeast region. This configuration promotes a more sustainable logistics chain for soy, with more rational use of transport modes and decentralization of investments to other regions.

https://doi.org/10.1590/0103-8478cr20190786 1566 downloads

14.

BRAZILIAN GASTRIC CANCER ASSOCIATION GUIDELINES (PART 2): UPDATE ON TREATMENT
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

BARCHI, Leandro Cardoso

; RAMOS, Marcus Fernando Kodama Pertille

; DIAS, André Roncon

; FORONES, Nora Manoukian

; CARVALHO, Marineide Prudêncio de

; CASTRO, Osvaldo Antonio Prado

; KASSAB, Paulo

; COSTA-JÚNIOR, Wilson Luiz da

; WESTON, Antônio Carlos

; ZILBERSTEIN, Bruno

; Ferraz, Álvaro Antônio Bandeira

; ZeideCharruf, Amir

; Brandalise, André

; Silva, André Maciel da

; Alves, Barlon

; Marins, Carlos Augusto Martinez

; Malheiros, Carlos Alberto

; Leite, Celso Vieira

; Bresciani, Claudio José Caldas

; Szor, Daniel

; Mucerino, Donato Roberto

; Wohnrath, Durval R.

; JirjossIlias, Elias

; Martins Filho, Euclides Dias

; PinatelLopasso, Fabio

; Coimbra, Felipe José Fernandez

; Felippe, Fernando E. Cruz

; Tomasisch, Flávio Daniel Saavedra

; Takeda, Flavio Roberto

; Ishak, Geraldo

; Laporte, Gustavo Andreazza

; Silva, Herbeth José Toledo

; Cecconello, Ivan

; Rodrigues, Joaquim José Gama

; Grande, José Carlos Del

; Lourenço, Laércio Gomes

; Motta, Leonardo Milhomem da

; Ferraz, Leonardo Rocha

; Moreira, Luis Fernando

; Lopes, Luis Roberto

; Toneto, Marcelo Garcia

; Mester, Marcelo

; Rodrigues, Marco Antônio Gonçalves

; Franciss, Maurice Youssef

; AdamiAndreollo, Nelson

; Corletta, Oly Campos

; Yagi, Osmar Kenji

; Malafaia, Osvaldo

; Assumpção, Paulo Pimentel

; Savassi-Rocha, Paulo Roberto

; Colleoni Neto, Ramiro

; Oliveira, Rodrigo Jose de

; AissarSallun, Rubens Antonio

; Weschenfelder, Rui

; Oliveira, Saint Clair Vieira de

; Abreu, Thiago Boechat de

; Castria, Tiago Biachi de

; Ribeiro Junior, Ulysses

; Barra, Williams

; Freitas Júnior, Wilson Rodrigues de

ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo)

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2021, Volume 34 N. 1 elocation e1563

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

RESUMO Racional: O II Consenso Brasileiro de Câncer Gástrico da Associação Brasileira de Câncer Gástrico ABCG (Parte 1) foi recentemente publicado. Nesta ocasião inúmeros especialistas que atuam no tratamento desta doença expressaram suas opiniões diante declarações apresentadas. Objetivo: Apresentar as Diretrizes da ABCG (Parte 2) quanto às indicações de tratamento cirúrgico, técnicas operatórias, extensão de ressecção e terapia combinada. Métodos: Para formulação destas diretrizes os autores realizaram extensa e atual revisão referente a cada declaração presente no II Consenso, utilizando as bases Medline/PubMed, Cochrane Library e SciELO, inicialmente com os seguintes descritores: câncer gástrico, gastrectomia, linfadenectomia, terapia combinada. Ainda, cada declaração foi classificada de acordo com o nível de evidência e grau de recomendação. Resultados: Das 43 declarações presentes neste estudo, 11 (25,6%) foram classificadas com nível de evidência A, 20 (46,5%) B e 12 (27,9%) C. Quanto ao grau de recomendação, 18 (41,9%) declarações obtiveram grau de recomendação 1, 14 (32,6%) 2a, 10 (23,3%) 2b e um (2,3%) 3. Conclusão: O complemento das diretrizes aqui presentes possibilita que cirurgiões e oncologistas que atuam no combate ao câncer gástrico possam oferecer o melhor tratamento possível, de acordo com as condições locais disponíveis.

ABSTRACT Background : The II Brazilian Consensus on Gastric Cancer of the Brazilian Gastric Cancer Association BGCA (Part 1) was recently published. On this occasion, countless specialists working in the treatment of this disease expressed their opinion in the face of the statements presented. Aim : To present the BGCA Guidelines (Part 2) regarding indications for surgical treatment, operative techniques, extension of resection and multimodal treatment. Methods: To formulate these guidelines, the authors carried out an extensive and current review regarding each declaration present in the II Consensus, using the Medline/PubMed, Cochrane Library and SciELO databases initially with the following descriptors: gastric cancer, gastrectomy, lymphadenectomy, multimodal treatment. In addition, each statement was classified according to the level of evidence and degree of recommendation. Results : Of the 43 statements present in this study, 11 (25,6%) were classified with level of evidence A, 20 (46,5%) B and 12 (27,9%) C. Regarding the degree of recommendation, 18 (41,9%) statements obtained grade of recommendation 1, 14 (32,6%) 2a, 10 (23,3%) 2b e one (2,3%) 3. Conclusion : The guidelines complement of the guidelines presented here allows surgeons and oncologists who work to combat gastric cancer to offer the best possible treatment, according to the local conditions available.

https://doi.org/10.1590/0102-672020210001e1563 768 downloads

15.

Giardiasis in urban and rural Amazonas, Brazil is driven by zoonotic and cosmopolitan A and B assemblages
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

dos Reis, Lisiane Lappe

; da Silva, Túllio Romão Ribeiro

; Braga, Francisco Carlos de Oliveira

; do Nascimento, Naara Macedo

; de Menezes, Katia Maria Lima

; Nava, Alessandra Ferreira Dales

; Lima, Natália Aparecida de Souza

; Vicente, Ana Carolina Paulo

Memórias do Instituto Oswaldo Cruz

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2021, Volume 116 elocation e210280

Abstract: En | Text: En | PDF: En

BACKGROUND Giardia duodenalis is a protozoan parasite that infects humans and other mammals and causes giardiasis worldwide. Giardia is genotyped into eight assemblages (A-H), with assemblages A and B considered zoonotic. OBJECTIVES The aim of this study was to determine the assemblages of G. duodenalis from individuals living in rural and urban areas of the Amazonas State. METHODS 103 human faecal specimens microscopically positive for the presence of Giardia obtained from four municipalities in Amazonas and four animal faecal specimens were genotyped based on the sequences of two genes, triosephosphate isomerase (TPI) and β-giardin (BG). FINDINGS In humans, assemblage A was the most represented with the identification of sub-assemblages AI, AII and AIII based on BG and sub-assemblages AI and AII based on TPI. Similarly, there is a diversity of sub-assemblage B considering BG (B and BIII) and TPI (B, BIII and BIV). In addition, we characterised homogeneous and heterogeneous genotypes comprising assemblages/sub-assemblages A and B in individuals from urban and rural areas. Here, for the first time, it was genotyped Giardia that infects animals from the Brazilian Amazon region. We identified sub-assemblage AI in one Ateles paniscus and two Felis catus and sub-assemblage BIV in one Lagothrix cana. MAIN CONCLUSIONS Therefore, humans and animals from the urban and rural Amazon share Giardia genotypes belonging to assemblages A and B, which are found in cosmopolitan regions around the world.

https://doi.org/10.1590/0074-02760210280

Showing

itens per page

Page of 6 Next

Select one or more results

All Alphabetic

Results

Comparative chart Download CSV

Statistics of

Send result

To*

Use ; (semicolon) to insert more emails.

Send to email

This page

Selected records

All references (max. 300)

Your email

Subject

Comments

Export format:

RIS (for EndNote, ProCite, Reference Manager, RefWorks, Citavi, etc.)

BibTeX

Citation

CSV (for Excel, etc)

Export:

This page

Selected itens

All references (max. 2000)

Sem resultados

No documents were found for your search

Glossary and search help

You can enrich your search in a very simple way. Use the search indexes combined with the connectors (AND or OR) and specify more your search.

For example, if you want to search for articles about
cases of dengue in Brasil in 2015, use:
ti:dengue and publication_year:2015 and aff_country:Brasil

See below the complete list of search indexes that can be used:

Index code	Element
ti	article title
au	author
kw	article keywords
subject	subject (title words, abstract and keywords)
ab	abstract
ta	journal short title (e.g. Cad. Saúde Pública)
journal_title	journal full title (e.g. Cadernos de Saúde Pública)
la	publication language code (e.g. pt - Portuguese, es - Spanish)
type	document type
pid	publication identifier
publication_year	publication year of publication
sponsor	sponsor
aff_country	country code of the author's affiliation
aff_institution	author affiliation institution
volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

SciELO - Scientific Electronic Library Online
Rua Dr. Diogo de Faria, 1087 – 9º andar – Vila Clementino 04037-003 São Paulo/SP - Brasil
Email: scielo@scielo.org

All the contents of this site www.scielo.br, except where otherwise noted, is licensed under a Creative Commons Attribution License.
more »