Investigating specialized plant metabolites, traditionally referred to as ‘secondary metabolites’ present in leaf extracts of cashew trees (Anacardium occidentale) resistant and susceptible to anthracnose disease was carried out using metabolomics combined with chemometric tools. We used clones of dwarf-cashew with the following variations of characteristics: resistant and healthy (CCP 76, BRS 226, BRS 189), susceptible and healthy (BRS 265), and another clone also susceptible but affected by the disease (BRS 265). The UPLC-QTOF-MSE (ultra performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry) analysis of the leaves of Anacardium clones allowed us to annotate a total of 39 metabolites. The multiple orthogonal partial discriminant analysis of the least-squares (OPLS-DA) allowed twelve metabolites to be potential biomarkers of differentiation among the clones studied. Namely, the triene-(17:3)-anacardic acid found on CCP 76 and BRS 189 clones, respectively, is the main candidate for biomarker of resistance. While catechin, B-type procyanidin isomers, and procyanidin dimer monogallate identified in BRS 265 are significant potential biomarkers of susceptibility.

Resumo O objetivo deste estudo foi analisar os fatores relacionados à saúde mental dos agentes comunitários de saúde (ACS) no contexto da COVID-19. Participaram 1.935 ACS de quatro capitais nordestinas e de quatro cidades do interior do Ceará. Foram coletados dados sociodemográficos e profissiográficos; SRQ-20; WHOQOL-Bref; exposição à violência; Escala de Autoeficácia Geral (EAEG); Escala Multidimensional de Suporte Social Percebido (MSPSS); informações relacionadas à COVID-19 e Escala de Ansiedade para Coronavírus (EAC). 40,5% exibiram SRQ > 7, sinalizando altos níveis de transtornos mentais comuns (TMC)/problemas de saúde mental. Utilizou-se a regressão linear múltiplas (backward). Observou-se que o aumento de risco de TCM foi influenciado pelos seguintes fatores: exposição à violência; EAC; não saber se teve COVID-19; desconhecer as variáveis que diminuíam o risco; os domínios físico e psicológico do WHOQOL-Bref; não ter aumento da jornada de trabalho; e não ter tido COVID-19. Os dados revelam a dinâmica multidimensional da saúde mental e ajudam a compreender a relação entre violência comunitária, COVID-19, qualidade de vida, idade e tempo de atuação na ESF com a saúde mental dos ACS.

Abstract This study aimed to analyze the factors related to the mental health of Community Health Workers (ACS) in the COVID-19 context. A total of 1,935 ACS from four Northeastern capitals and four cities in the inland region of Ceará participated. The following data were collected: sociodemographic; professional; SRQ-20; WHOQOL-Bref, exposure to violence, General Self-Efficacy Scale (EAEG), Multidimensional Scale of Perceived Social Support (MSPSS), COVID-19-related information, and the coronavirus anxiety scale (EAC). Approximately 40.5% had SRQ > 7, signaling high levels of Common Mental Disorders (CMD)/mental health issues. We adopted the Multiple linear (backward) regression. We observed that the increased risk of CMD was influenced by exposure to violence, EAC, not knowing they had COVID-19, not knowing the variables that reduced the risk, the physical and psychological domains of the WHOQOL-Bref, not having increased working hours, and not having had COVID-19. The data reveal the multidimensional dynamics of mental health and help understand the relationship between community violence, COVID-19, quality of life, age, and ESF working time with the mental health of ACS.

Resumo: Este artigo avalia as repercussões da pandemia da COVID-19 no cotidiano de trabalho da equipe da Estratégia Saúde da Família (ESF) em diversos municípios do Nordeste brasileiro, na perspectiva dos agentes comunitários de saúde (ACS). Um questionário estruturado foi utilizado para coletar informações sobre a COVID-19, atividades dos ACS e equipes da ESF em 2021. Participaram 1.935 ACS de quatro capitais (Fortaleza - Ceará, João Pessoa - Paraíba, Recife - Pernambuco e Teresina - Piauí) e quatro cidades do interior (Crato, Juazeiro do Norte, Barbalha e Sobral, Ceará). A idade média dos ACS era de 46,25±8,54 anos, sendo a maioria mulheres (82,42%). Muitos (39,92%) estavam infectados com COVID-19, dos quais 70,78% acreditavam ter sido infectados no ambiente de trabalho. Ao todo, 77,82% definiam seu papel como linha de frente no combate à COVID-19, 16,07% relataram receber treinamento para a COVID-19 e 13,74% tinham acesso a equipamentos de proteção suficientes contra a COVID-19. A maioria (90,27%) acredita que suas rotinas de trabalho foram modificadas pela pandemia, fortalecendo o espírito de equipe (41,46%) ou enfraquecendo-o (44,41%). Houve uma redução na promoção da saúde nas escolas (75,66%) e na frequência de visitas domiciliares (60,55%), de grupos específicos na comunidade (93,96%) e outros serviços comunitários locais (66,01%). Nos municípios avaliados, observou-se uma heterogeneidade significativa em relação à resposta à pandemia de COVID-19, possivelmente associada à falta de coordenação do Governo Federal. A pandemia levou a uma reconfiguração dos sistemas locais de saúde, fluxos de trabalho e protocolos de atenção primária para as equipes da ESF. A importância do Sistema Único de Saúde (SUS) e seu potencial de reorganização durante as crises devem ser reconhecidos, preservando-se os avanços alcançados até o momento.

Resumen: Este artículo evalúa las repercusiones de la pandemia de COVID-19 en el trabajo cotidiano del equipo de la Estrategia Salud de la Familia (ESF) en diversos municipios del Nordeste brasileño, desde la perspectiva de los agentes comunitarios de salud (ACS). Se utilizó un cuestionario estructurado para recopilar información sobre COVID-19, actividades de los ACS y equipos de la ESF en el 2021. Participaron 1.935 ACS de cuatro capitales (Fortaleza - Ceará, João Pessoa - Paraíba, Recife - Pernambuco y Teresina - Piauí) y cuatro ciudades del interior (Crato, Juazeiro do Norte, Barbalha y Sobral - Ceará). La edad media de los ACS era de 46,25±8,54 años, y la mayoría eran mujeres (82,42%). Muchos (39,92%) estaban infectados con COVID-19, de los cuales el 70,78% creía haberse contagiado en el entorno laboral. En total, el 77,82% definió su papel como línea de frente en el combate a la COVID-19, el 16,07% informó haber recibido capacitación para la COVID-19 y el 13,74% tuvo acceso a equipos de protección suficiente contra la COVID-19. La mayoría (90,27%) cree que sus rutinas de trabajo se vieron modificadas por la pandemia, fortaleciendo el espíritu de equipo (41,46%) o debilitándolo (44,41%). Hubo una reducción en la promoción de la salud en las escuelas (75,66%) y en la frecuencia de las visitas domiciliarias (60,55%), de grupos específicos en la comunidad (93,96%) y otros servicios comunitarios locales (66,01%). En los municipios analizados, se observó una heterogeneidad significativa con relación a la respuesta a la pandemia de COVID-19, posiblemente asociada a la falta de coordinación del Gobierno Federal. La pandemia condujo a una reconfiguración de los sistemas locales de salud, los flujos de trabajo y los protocolos de atención primaria para los equipos de la ESF. Se debe reconocer la importancia del Sistema Único de Salud y (SUS) su capacidad de reorganización durante las crisis, preservando los avances logrados hasta el momento.

Abstract: This article evaluates the COVID-19 pandemic impacts on the Family Health Strategy (FHS) team’s work routines across a range of northeast Brazilian cities as perceived by community health workers (CHW). Data on COVID-19, CHW activities, and FHS teams were collected in 2021 by a structured questionnaire. A total of 1,935 CHWs from four state capitals (Fortaleza - Ceará State, João Pessoa - Paraíba State, Recife - Pernambuco State, Teresina - Piauí State) and four hinterland cities (Crato, Juazeiro do Norte, Barbalha, Sobral - Ceará State) participated in the study. Most CHWs were women (82.42%), with mean age 46.25±8.54 years. Many (39.92%) were infected with COVID-19, of which 70.78% believed they were infected in the workplace. A total of 77.82% defined their role as frontline in the fight against COVID-19, 16.07% reported receiving training for COVID-19, and 13.74% had access to sufficient protective equipment. Most (90.27%) believed their work routines were modified by the pandemic, either strengthening (41.46%) or weakening (44.41%) the team spirit. Home visits (60.55%), health promotion actions in schools (75.66%) and in specific community groups (93.96%), and other on-site community services (66.01%) showed a reduction in frequency. The sampled cities revealed a significant heterogeneity regarding responses to the COVID-19 pandemic, possibly associated with a lack of coordination by the Federal Government. Regardless of context, the pandemic led to a reconfiguration of local health systems, workflows, and primary care protocols for FHS teams. The importance of the Brazilian Unified National Health System (SUS) and its potential for reorganization during crisis should be acknowledged while preserving the headway made thus far.

Abstract This study aimed to analyze the factors related to the mental health of Community Health Workers (ACS) in the COVID-19 context. A total of 1,935 ACS from four Northeastern capitals and four cities in the inland region of Ceará participated. The following data were collected: sociodemographic; professional; SRQ-20; WHOQOL-Bref, exposure to violence, General Self-Efficacy Scale (EAEG), Multidimensional Scale of Perceived Social Support (MSPSS), COVID-19-related information, and the coronavirus anxiety scale (EAC). Approximately 40.5% had SRQ > 7, signaling high levels of Common Mental Disorders (CMD)/mental health issues. We adopted the Multiple linear (backward) regression. We observed that the increased risk of CMD was influenced by exposure to violence, EAC, not knowing they had COVID-19, not knowing the variables that reduced the risk, the physical and psychological domains of the WHOQOL-Bref, not having increased working hours, and not having had COVID-19. The data reveal the multidimensional dynamics of mental health and help understand the relationship between community violence, COVID-19, quality of life, age, and ESF working time with the mental health of ACS.

Resumo O objetivo deste estudo foi analisar os fatores relacionados à saúde mental dos agentes comunitários de saúde (ACS) no contexto da COVID-19. Participaram 1.935 ACS de quatro capitais nordestinas e de quatro cidades do interior do Ceará. Foram coletados dados sociodemográficos e profissiográficos; SRQ-20; WHOQOL-Bref; exposição à violência; Escala de Autoeficácia Geral (EAEG); Escala Multidimensional de Suporte Social Percebido (MSPSS); informações relacionadas à COVID-19 e Escala de Ansiedade para Coronavírus (EAC). 40,5% exibiram SRQ > 7, sinalizando altos níveis de transtornos mentais comuns (TMC)/problemas de saúde mental. Utilizou-se a regressão linear múltiplas (backward). Observou-se que o aumento de risco de TCM foi influenciado pelos seguintes fatores: exposição à violência; EAC; não saber se teve COVID-19; desconhecer as variáveis que diminuíam o risco; os domínios físico e psicológico do WHOQOL-Bref; não ter aumento da jornada de trabalho; e não ter tido COVID-19. Os dados revelam a dinâmica multidimensional da saúde mental e ajudam a compreender a relação entre violência comunitária, COVID-19, qualidade de vida, idade e tempo de atuação na ESF com a saúde mental dos ACS.

Abstract Foodborne diseases are common illnesses caused by the consumption of food contaminated with microorganisms, such as viruses, fungi, bacteria, and protozoa. Every year, 600 million people become ill and 420,000 people die as a result of consuming contaminated food. Therefore, food safety is an important issue. In this study, samples of homemade spiced mayonnaise and self-serve acai sold in the city of Araguaína, Tocantins, Brazil were analyzed for microbiological contaminants. Acai was collected from 10 stores, one sample from each store, and tested for mold, yeast, and coliforms, as well as coliform identification and total and thermotolerant coliform counts. Mayonnaise was collected from 20 snack bars, one sample from each. These samples were inoculated on MacConkey and Salmonella Shigella agar plates, and the plates were analyzed for growth. Salmonella spp. were detected in some Mayonnaise samples, and coliforms were detected in all acai samples; 60% of samples had thermotolerant coliforms, and only 40% were within the limits established by ANVISA. The collected samples of mayonnaise and acai were contaminated with molds and yeasts above the established limit of 103 CFU/g. Thus, the analyzed mayonnaise and acai samples were contaminated and unfit for consumption, demonstrating the importance of hygienic-sanitary measures in food handling.

Resumo As doenças transmitidas por alimentos são doenças comuns causadas pelo consumo de alimentos contaminados com microrganismos, como vírus, fungos, bactérias e protozoários. Todos os anos, 600 milhões de pessoas ficam doentes e 420.000 pessoas morrem como resultado do consumo de alimentos contaminados. Portanto, a segurança alimentar é uma questão importante. Neste estudo, amostras de maionese temperada caseira e açaí self-service vendidas na cidade de Araguaína, Tocantins, Brasil foram analisadas quanto a contaminantes microbiológicos. O açaí foi coletado em 10 lojas, uma amostra de cada loja, e testado para mofo, levedura e coliformes, bem como identificação de coliformes e contagem de coliformes totais e termotolerantes. A maionese foi coletada de 20 lanchonetes, sendo uma amostra de cada. Essas amostras foram inoculadas em placas de ágar MacConkey e Salmonella Shigella, e as placas foram analisadas quanto ao crescimento. Salmonela spp. foram detectados em algumas amostras de maionese e coliformes foram detectados em todas as amostras de açaí; 60% das amostras apresentaram coliformes termotolerantes, e apenas 40% estavam dentro dos limites estabelecidos pela ANVISA. As amostras coletadas de maionese e açaí estavam contaminadas com bolores e leveduras acima do limite estabelecido de 103 UFC/g. Assim, as amostras de maionese e açaí analisadas estavam contaminadas e impróprias para o consumo, demonstrando a importância das medidas higiênico-sanitárias na manipulação de alimentos.

Abstract: This article evaluates the COVID-19 pandemic impacts on the Family Health Strategy (FHS) team’s work routines across a range of northeast Brazilian cities as perceived by community health workers (CHW). Data on COVID-19, CHW activities, and FHS teams were collected in 2021 by a structured questionnaire. A total of 1,935 CHWs from four state capitals (Fortaleza - Ceará State, João Pessoa - Paraíba State, Recife - Pernambuco State, Teresina - Piauí State) and four hinterland cities (Crato, Juazeiro do Norte, Barbalha, Sobral - Ceará State) participated in the study. Most CHWs were women (82.42%), with mean age 46.25±8.54 years. Many (39.92%) were infected with COVID-19, of which 70.78% believed they were infected in the workplace. A total of 77.82% defined their role as frontline in the fight against COVID-19, 16.07% reported receiving training for COVID-19, and 13.74% had access to sufficient protective equipment. Most (90.27%) believed their work routines were modified by the pandemic, either strengthening (41.46%) or weakening (44.41%) the team spirit. Home visits (60.55%), health promotion actions in schools (75.66%) and in specific community groups (93.96%), and other on-site community services (66.01%) showed a reduction in frequency. The sampled cities revealed a significant heterogeneity regarding responses to the COVID-19 pandemic, possibly associated with a lack of coordination by the Federal Government. Regardless of context, the pandemic led to a reconfiguration of local health systems, workflows, and primary care protocols for FHS teams. The importance of the Brazilian Unified National Health System (SUS) and its potential for reorganization during crisis should be acknowledged while preserving the headway made thus far.

Resumen: Este artículo evalúa las repercusiones de la pandemia de COVID-19 en el trabajo cotidiano del equipo de la Estrategia Salud de la Familia (ESF) en diversos municipios del Nordeste brasileño, desde la perspectiva de los agentes comunitarios de salud (ACS). Se utilizó un cuestionario estructurado para recopilar información sobre COVID-19, actividades de los ACS y equipos de la ESF en el 2021. Participaron 1.935 ACS de cuatro capitales (Fortaleza - Ceará, João Pessoa - Paraíba, Recife - Pernambuco y Teresina - Piauí) y cuatro ciudades del interior (Crato, Juazeiro do Norte, Barbalha y Sobral - Ceará). La edad media de los ACS era de 46,25±8,54 años, y la mayoría eran mujeres (82,42%). Muchos (39,92%) estaban infectados con COVID-19, de los cuales el 70,78% creía haberse contagiado en el entorno laboral. En total, el 77,82% definió su papel como línea de frente en el combate a la COVID-19, el 16,07% informó haber recibido capacitación para la COVID-19 y el 13,74% tuvo acceso a equipos de protección suficiente contra la COVID-19. La mayoría (90,27%) cree que sus rutinas de trabajo se vieron modificadas por la pandemia, fortaleciendo el espíritu de equipo (41,46%) o debilitándolo (44,41%). Hubo una reducción en la promoción de la salud en las escuelas (75,66%) y en la frecuencia de las visitas domiciliarias (60,55%), de grupos específicos en la comunidad (93,96%) y otros servicios comunitarios locales (66,01%). En los municipios analizados, se observó una heterogeneidad significativa con relación a la respuesta a la pandemia de COVID-19, posiblemente asociada a la falta de coordinación del Gobierno Federal. La pandemia condujo a una reconfiguración de los sistemas locales de salud, los flujos de trabajo y los protocolos de atención primaria para los equipos de la ESF. Se debe reconocer la importancia del Sistema Único de Salud y (SUS) su capacidad de reorganización durante las crisis, preservando los avances logrados hasta el momento.

Resumo: Este artigo avalia as repercussões da pandemia da COVID-19 no cotidiano de trabalho da equipe da Estratégia Saúde da Família (ESF) em diversos municípios do Nordeste brasileiro, na perspectiva dos agentes comunitários de saúde (ACS). Um questionário estruturado foi utilizado para coletar informações sobre a COVID-19, atividades dos ACS e equipes da ESF em 2021. Participaram 1.935 ACS de quatro capitais (Fortaleza - Ceará, João Pessoa - Paraíba, Recife - Pernambuco e Teresina - Piauí) e quatro cidades do interior (Crato, Juazeiro do Norte, Barbalha e Sobral, Ceará). A idade média dos ACS era de 46,25±8,54 anos, sendo a maioria mulheres (82,42%). Muitos (39,92%) estavam infectados com COVID-19, dos quais 70,78% acreditavam ter sido infectados no ambiente de trabalho. Ao todo, 77,82% definiam seu papel como linha de frente no combate à COVID-19, 16,07% relataram receber treinamento para a COVID-19 e 13,74% tinham acesso a equipamentos de proteção suficientes contra a COVID-19. A maioria (90,27%) acredita que suas rotinas de trabalho foram modificadas pela pandemia, fortalecendo o espírito de equipe (41,46%) ou enfraquecendo-o (44,41%). Houve uma redução na promoção da saúde nas escolas (75,66%) e na frequência de visitas domiciliares (60,55%), de grupos específicos na comunidade (93,96%) e outros serviços comunitários locais (66,01%). Nos municípios avaliados, observou-se uma heterogeneidade significativa em relação à resposta à pandemia de COVID-19, possivelmente associada à falta de coordenação do Governo Federal. A pandemia levou a uma reconfiguração dos sistemas locais de saúde, fluxos de trabalho e protocolos de atenção primária para as equipes da ESF. A importância do Sistema Único de Saúde (SUS) e seu potencial de reorganização durante as crises devem ser reconhecidos, preservando-se os avanços alcançados até o momento.

In this paper, the oxidation behavior of silicon nitride with different contents of TiN was evaluated at 1400 oC for 64 hours in air. The oxidized samples were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. Weight gain measurements have shown that the oxidation followed a multiple-law model with linear, parabolic, and logarithmic contributions. The samples presented high weight gain at the beginning of the process followed by the formation of an amorphous silica surface layer containing Y2Ti2O7 and rutile crystals. Cracks and holes were detected on the oxide layer. The oxidation resistance of the composites was strongly influenced by the initial content of TiN.

Black mold, a disease caused by the fungus Pilgeriella anacardii Arx & Müller, affects cashews (Anacardium occidentale). Some cashew clones are more resistant to the pathogen; however, little is known about the chemical profile responsible for this trait. The investigation of volatile organic compounds (VOCs) from leaves of dwarf cashew clones resistant (BRS 226 and BRS 265) and susceptible (CCP 76 and BRS 189) to the pathogen was carried out. Leaves were collected during the months of disease incidence and decline (March to July 2019, Brazil), and VOCs were analyzed by gas chromatography-mass spectrometry (GC-MS) combined with chemometric tools. The GC-MS analysis tentatively identified 96 compounds. Partial least squares discriminant analysis (PLS-DA), orthogonal partial least squares discriminant analysis (OPLS DA), hierarchical cluster analysis (HCA), and ROC curves analysis were useful in dividing VOCs into distinct resistance and associated chemical susceptibility groups for different clones. The VOCs in the leaves of the resistant clones were identified as alcohols and aldehydes containing six carbons: (E)-hex-2-enal, hex-3-en-1-ol, (Z)-hex-2-en-1-ol, (E)-hex-2-en-1-ol, and hexan-1-ol. Moreover, α-pinene, pseudolimonene, α-phellandrene, β-myrcene, sylvestrene, β-cis-ocimene, methyl salicylate, myrtenol, α-copaene, γ-muurolene, germacrene D, valencene, and germacrene B were also detected in these samples and may be candidate chemical biomarkers for cashew resistance to P. anacardii.

RESUMO A degradação ambiental impacta negativamente a diversidade e a quantidade dos invertebrados do solo, notadamente em regiões semiáridas. Geralmente, uma alta diversidade de invertebrados indica a biofuncionalidade e a sustentabilidade do uso do solo. Nós avaliamos o efeito de 14 anos de isolamento e da presença das árvores nativas Mimosa tenuiflora e Cnidoscolus quercifolius na mesofauna do solo de uma área degradada de Caatinga, de acordo com o teste do χ 2 aplicado aos dados de abundância desses microorganismos. O isolamento da área sozinho mais que triplicou a mesofauna do solo. A abundância da mesofauna sob a copa da M. tenuiflora aumentou 3,17 e 3,41 vezes na área com e sem pastejo, respectivamente, e sob a copa da C. quercifolius aumentou em 22.6 vezes na área sem pastejo. O efeito da M. tenuiflora na área pastejada foi similar ao de 14 anos de isolamento. A quantidade da mesofauna sob a copa de C. quercifolius após 14 anos de isolamento foi 6,6 vezes maior do que a observada sob a de M. tenuiflora em condições similares. O isolamento da área e árvores, especialmente C. quercifolius, aumentaram a quantidade da mesofauna do solo, porém, a recuperação total desses organismos em áreas degradadas de Caatinga pode necessitar de mais de 14 anos. Considerando o cenário atual de degradação ambiental crescente, nossos dados sobre as relações entre a mesofauna do solo, o isolamento de áreas e árvores nativas são importantes para delinear estratégias e procedimentos para a recuperação de áreas degradadas no bioma Caatinga.

ABSTRACT Environmental degradation impacts negatively the diversity and quantity of invertebrates living in the soil, mainly in semiarid regions. Generally, a high diversity of invertebrates indicates good biofunctionality and sustainable use of the soil. We evaluated the effects of 14 years of grazing deferment and the presence of the native trees Mimosa tenuiflora and Cnidoscolus quercifolius on the soil mesofauna of a degraded Caatinga area, according to the χ 2 test, applied to assess the abundance of these microorganisms. The grazing deferment alone more than tripled the soil mesofauna. The abundance of the mesofauna under M. tenuiflora canopies increased by a factor of 3.17 and 3.41 in grazed and ungrazed areas, respectively, and under C. quercifolius canopies increased by a factor of 22.6 in the ungrazed area. The effect of M. tenuiflora in the grazed area was similar to 14 years of grazing deferment. The quantity of mesofauna under C. quercifolius canopies after 14 years of grazing deferment was 6.6-fold higher than that under M. tenuiflora canopies, under similar conditions. The grazing deferment and trees, especially C. quercifolius, increased the soil mesofauna; however, full recovery of such organisms in degraded Caatinga areas may need more than 14 years. Considering the current scenario of increasing environmental degradation, our findings regarding the relationships between soil mesofauna, grazing deferment and native trees are important to devise strategies and procedures for the recovery of degraded areas in the Caatinga biome.

Resumo A proantocianidina (PA) é um biomodificador dentinário promissor devido a sua capacidade de estabilizar as fibrilas colágenas contra a degradação por metaloproteinases da matriz (MMPs); no entanto, o protocolo mais eficaz para a incorporação de PA em procedimentos adesivos ainda não está claro. Este estudo avaliou o efeito da biomodificação da dentina com um condicionador ácido contendo PA na atividade de MMPs, morfologia da interface adesiva e resistência à microtração resina-dentina. Molares humanos extraídos foram lixados para exposição da dentina e condicionados com ácido por 15 s de acordo com os grupos: EXP - ácido fosfórico experimental; EXP+PA - ácido fosfórico experimental com 10% PA; TE - sistema total-etch; SE - sistema self-etch. As amostras foram restauradas com resina composta e armazenadas em água destilada (37ºC). A atividade de MMP e morfologia da interface foram analisadas após 24 h por zimografia in situ (n=6) e microscopia eletrônica de varredura (n=3), respectivamente. A resistência à microtração resina-dentina (μTBS) foi avaliada após 24 horas e 6 meses de armazenamento (n=6). Atividade de MMP detectada na dentina condicionada foi significativamente maior em comparação com a dentina não tratada (p <0,05), mas não houve diferenças entre os diferentes ácidos. Tags e microtags de resina, indicativos de uma penetração adequada do sistema adesivo nos túbulos e microtúbulos dentinários, foram observadas ao longo da camada híbrida em todos os grupos. Não houve diferença entre os valores de μTBS de 24 h e 6 meses para EXP+PA; além disso, EXP+PA apresentou maiores valores de μTBS após 6 meses em comparação com TE e EXP (p <0,05). Os resultados sugerem que a biomodificação por 15 s não foi suficiente para reduzir significativamente a atividade de MMP; apesar disso, EXP + PA foi capaz de melhorar a estabilidade da interface resina-dentina em comparação com sistemas total- e self-etch comerciais.

Abstract Proanthocyanidin (PA) is a promising dentin biomodifier due to its ability to stabilize collagen fibrils against degradation by matrix metalloproteinases (MMPs); however, the most effective protocol to incorporate PA into bonding procedures is still unclear. This study evaluated the effect of dentin biomodification with a PA acid etchant on MMP activity, adhesive interface morphology and resin-dentin microtensile bond strength. Sound extracted human molars were flattened to expose dentin and acid-etched for 15 s according to the groups: EXP - experimental phosphoric acid; EXP+PA - experimental phosphoric acid 10% PA; TE - total-etching system; SE - self-etching system. Samples were restored with composite resin and stored in distilled water (37ºC). MMP activity and interface morphology were analyzed after 24 h by in situ zymography (n=6) and scanning electron microscopy (n=3), respectively. The resin-dentin microtensile bond strength (μTBS) was evaluated after 24 h and 6 months storage (n=6). Significantly higher MMP activity was detected in etched dentin compared with untreated dentin (p<0.05), but no difference among acid groups was found. Resin tags and microtags, indicative of proper adhesive system penetration in dentinal tubules and microtubules, were observed along the hybrid layer in all groups. There was no difference in μTBS between 24 h and 6 months for EXP+PA; moreover, it showed higher long-term μTBS compared with TE and EXP (p<0.05). The results suggest that 15 s of biomodification was not sufficient to significantly reduce MMP activity; nonetheless, EXP+PA was still able to improve resin-dentin bond stability compared with total- and self-etching commercial systems.

RESUMO Objetivou-se com esse estudo automatizar a aquisição da variável tempo bem como o cálculo da condutividade hidráulica do solo saturado pelo método da carga decrescente usando sensores de água e a plataforma Arduino. Para automatizar a medição da variável tempo, foi utilizado a placa Arduino Uno e instalados dois sensores de nível de água analógico nas alturas inicial (h0) e final (h1). Quando a água flui pelo solo e o nível da água passa pela parte inferior do sensor inicial (h0), o registro do tempo começa; termina quando a água está ausente da altura final do segundo sensor (h1). A equação para cálculo da condutividade hidráulica foi inserida no algoritmo para se ter o cálculo automaticamente. Amostras de solo indeformadas foram coletadas em uma área de plantio direto de longo prazo. Os valores médios do tempo e da condutividade hidráulica não apresentaram diferenças significativas entre os permeâmetros. O índice coeficiente de massa residual (CRM) mostrou superestimação da variável tempo, indicando que o permeâmetro automático melhora a precisão da medição do tempo e da condutividade hidráulica do solo saturado estimada pelo método da carga decrescente.

ABSTRACT The objective of this study was to automate the acquisition of water travel time, as well as the computation of hydraulic conductivity of saturated soil by the falling head method, using water sensors and the Arduino platform. To automate the measurement of travel time, the Arduino Uno board was used, and two water sensors were installed at the initial (h0) and final (h1) heights of the water inside the core. When the water flows across the soil and the water level passes the bottom part of the initial sensor (h0), the time recording starts; it ends when the water is absent from the final height of the second sensor (h1). The equation for calculating the hydraulic conductivity was inserted into the algorithm so the calculation was automatic. Undisturbed soil samples were taken in a long-term no-tillage area. There were no significant differences for the time and hydraulic conductivity means between the permeameters. The coefficient of the residual mass index showed an overestimation of the time variable; thus, the automated permeameter improves the precision of time recording and saturated hydraulic conductivity estimated by the falling head method.

Abstract Background: Rheumatic diseases are associated with an increase in overall risks of tuberculosis (TB). The aim of this study was to evaluate the frequency of TB and the frequency of latent TB infection (LTBI), in clinical practice, for juvenile idiopathic arthritis (JIA) patients from high and low risk of TB incidence endemic countries. Methods: This is an international, multicenter, cross-sectional, observational study of data collection from Brazil and Registry of Portugal at REUMA.PT. The inclusion criteria were patients with Juvenile Idiopathic Arthritis (JIA) with age ≤ 18 years who underwent screening for Mycobacterium tuberculosis infection [tuberculin skin test (TST) and/or interferon gamma release assay (IGRA)]. Chest X-rays and history of exposure to TB were also assessed. Results: 292 JIA patients were included; mean age 14.3 years, mean disease duration 7.5 years, 194 patients (66.4%) performed only TST, 14 (4.8%) only IGRA and 84 (28.8%) both. The frequency of LTBI (10.6%) and TB was similar between the two countries. The reasons for TB screening were different; in Brazil it was performed more often at JIA onset while in Portugal it was performed when starting Disease Modified Anti-Rheumatic Drugs (DMARD) treatment (p < 0.001). Isoniazid therapy was prescribed in 40 (13.7%) patients (31 with LTBI and 9 with epidemiologic risks and/or due to contact with sick people). Only three patients (1%) developed active TB. Conclusion: We found nearly 10% of patients with LTBI, a small percentage of patients with treatment due to epide-miologic risks and only 1% with active TB. Distinct reasons and screening methods for LTBI were observed between the two countries.

Plant phenolic extracts are widely recognized as an important source of natural antioxidant substances and potential compounds for cosmetic formulations. This study aimed to evaluate the chemical profile, photoprotective and antioxidant activities of stem bark extract of Spondias purpurea L. (ciriguela) and its application in photoprotective formulations. Thirty phenolic constituents were annotated by ultra-performance liquid chromatography coupled with an electrospray ionization quadrupole time-of-flight mass spectrometry in mode negative (UPLC-QTOF-MS2). The stem bark extract antioxidant and chelation potential, expressed in half maximal inhibitory concentration (IC50), showed 6.25 and 352.22 µg mL−1, respectively. The phenolic extract was used as an active ingredient in six sunscreen formulations, with concentrations ranging from 0.2 to 10%. The ultraviolet (UV) protection properties of the formulations were evaluated by sun protection factor (SPF) values obtained in 0.2 mg mL−1 (0.495 to 2.27) and 2.0 mg mL−1 (2.29 to 15.87). The SPF value for the extract (14.37 and 26.16) was high, but there was a reduction in the base formulation. However, these results suggested that the bioactive extracted of stem bark of Spondias purpurea L. has interesting potential to reduce the damage caused by UV radiation and may be utilized as an active ingredient in a sunscreen formulation.

Resumo A cochonilha Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) é uma praga de algodão, amplamente, difundida em várias regiões produtoras do Brasil, particularmente, na região semiárida do sudoeste da Bahia. O impacto do caulim na sobrevivência, desenvolvimento e reprodução de P. solenopsis foi avaliado em laboratório. O delineamento experimental foi inteiramente casualizado com dois tratamentos: imaturos ou adultos recém-emergidos de P. solenopsis alimentados com discos foliares de algodão tratados com caulim (com caulim) e pulverizadas com este produto (T1) e imaturos ou adultos recém-emergidos de P. solenopsis alimentados com discos foliares de algodão tratados com água destilada (sem caulim) e pulverização dos insetos com água destilada (T2). A suspensão do caulim encurtou o ciclo de vida, aumentou o potencial reprodutivo e o crescimento populacional da cochonilha-do-algodoeiro, P. solenopsis e, portanto, deve ser utilizado com cautela em plantas de algodão em regiões com histórico de ocorrência desta praga.

Abstract The mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) is a cotton pest widespread in several cotton growing regions of Brazil, particularly in the semi-arid region of southwestern Bahia. The impact of kaolin on survival, development and reproduction of P. solenopsis was evaluated in the laboratory. The experiment was developed in a completely randomized design with two treatments: immature or newly emerged adults of P. solenopsis sprayed with kaolin and fed with cotton leaf discs treated with kaolin suspension (with kaolin) (T1) and immature or newly emerged adults of P. solenopsis sprayed with distilled water and fed with cotton leaf discs treated with distilled water (without kaolin) (T2). The kaolin suspension shortens the life cycle, increases the reproductive potential and population growth of the cotton mealybug, P. solenopsis and, therefore, it should be used with caution on cotton plants in regions with a history of occurrence of this pest.