Abstract Introduction The Covid-19 pandemic has significantly impacted people's lives, with children being one of the most affected social groups. Objective To understand how children experienced daily life during the Covid-19 pandemic from their own perspective. Method Exploratory study, using a qualitative approach, conducted with 19 children aged 9 to 11 years old, linked to a public school. Graphic elucidation was used as a trigger for the theme's collection of data, followed by a semi-structured interview. Both the narratives derived from graphic elucidations and the data produced in interviews were analyzed using content analysis. Results Some themes emerged, four of which will be presented - children's understanding of Covid-19 and the feelings generated; death and mourning as a result of the pandemic; family relationships; the social vulnerability experienced by families. The results showed how clear the children were about the origin of the virus and its spread, the risks arising from contamination such as the death of family members, and the importance of the vaccine. In some families it was possible to share more moments together and, in others, there was distancing, conflicts and reports of violence. In addition, the situation of social vulnerability stands out, in the face of unemployment and hunger. Conclusion The results made it possible to identify how children experienced the pandemic in a scenario of greater social vulnerability, based on the voices and perspectives of the children themselves. It is understood that investing in studies of this nature enables better coping with future adverse situations, favoring their development and mental health, based on the proposition of public policies and care strategies for this population.

Resumo Introdução O cenário da pandemia da Covid-19 impactou significativamente a vida das pessoas, de forma que as crianças foram um dos grupos sociais mais afetados. Objetivo Compreender como as crianças vivenciaram o cotidiano na pandemia da Covid-19, a partir de sua própria perspectiva. Método Estudo exploratório, de abordagem qualitativa, realizado com 19 crianças de 9 a 11 anos, vinculadas a uma escola pública. Para a coleta de dados, foi utilizada a elucidação gráfica como disparador da temática e uma entrevista semiestruturada. Os dados produzidos foram analisados com base na análise temática. Resultados Quatro temas emergiram: a compreensão das crianças sobre a Covid-19 e os sentimentos gerados; a morte e o luto em decorrência da pandemia; as relações familiares; e a vulnerabilidade social vivenciada pelas famílias. Os resultados evidenciaram a clareza das crianças sobre a origem do vírus e sua propagação, os riscos advindos da contaminação e a importância da vacina. Em algumas famílias foi possível compartilhar mais momentos juntos e, em outras, houve o distanciamento, conflitos e relatos de violência. O desemprego e a fome também se fizeram presentes. Conclusão Os resultados permitiram identificar como as crianças vivenciaram a pandemia em um cenário de maior vulnerabilidade social, a partir das vozes e perspectivas das próprias crianças. Compreende-se que o investimento em estudos dessa natureza possibilita o melhor enfrentamento de situações futuras adversas, favorecendo o seu desenvolvimento e saúde mental, com base na proposição de políticas públicas e estratégias de cuidado a essa população.

The new generation of cutting fluids should have some characteristics, such as low toxicity and biodegradability. A bio-cutting fluid emulsion are an excellent option because they present those properties, as well as good mechanical performance. The present study aims to investigate the lubricity of O/W emulsions (cutting fluid emulsion), varying the concentration of anionic surfactant (1%, 2.5% and 5%) and epoxidized oil (5%, 10%, 15%, 20% e 25%). A sunflower oil was chemically modified by epoxidation reaction, then its viscosity, iodine and oxirane index, density, and acidity were characterized. The performances of the emulsions were evaluated using a tribometer HFRR (High Frequency Reciprocating Rig), under hydrodynamic lubrication conditions. The ball wear scars were analyzed using an optical microscopy. The results showed that a low concentration of surfactant promote friction and wear reduction. Based on the tribological performance, the emulsions with 5% and 10% of epoxidized oil are more suitable.

O objetivo deste estudo foi revisar na literatura científica os artigos que investigam o papel das mães, dos pais e das famílias no tratamento da obesidade dos filhos. Buscou-se artigos originais nas plataformas Bireme (BVS) e Pubmed (Medline) e na base de dados Scielo, entre os anos de 2004 a 2010, com os descritores "the role of parents" and "childhood obesity", "the role of parents" and "child obesity treatment", "the mothers role" and "childhood obesity"; "the mothers" role" and "child obesity treatment", e em português. Foram selecionados 20 estudos, divididos em duas categorias temáticas.Verificou-se que há implicações do papel da familia, pai ou mãe na obesidade das crianças e mais especificamente, dos fatores relacionados ao papel das mães. Identificou-se como fundamental o papel dos pais, mães e familiares no sentido de promover comportamentos e estilos de vida saudável. A percepção materna distorcida faz com que o excesso de peso seja percebido como normal e isso pode prejudicar o tratamento. O reconhecimento do excesso de peso das crianças possivelmente poderá promover uma melhora na adesão e, além disso, pode ser o requisito necessário para a procura de ajuda profissional.

The goal of this study is to review articles in the scientific literature investigating the role of mothers, fathers and relatives in the treatment of obesity of their children. A search for original articles was conducted in the BIREME (BVS), PUBMED (MEDLINE) and Scielo platforms from 2004 to 2010, using the key words "the role of parents" and "childhood obesity," "the role of parents" and "child obesity treatment," "the mother's role" and "childhood obesity," "the mothers role" and "child obesity treatment." Twenty papers were selected and divided into two thematic categories. It was revealed that there are implications of the role of family, namely the father or mother, on the obesity of children, and more specifically related to the role of mothers. The conclusion drawn is that the role of parents and relatives is fundamental in promoting healthy behavior and lifestyles. Distorted maternal perception leads to excess weight being perceived as normal and this may prejudice treatment of child obesity. Acknowledging that the children are overweight most probably promotes greater acceptance of the need for treatment, in addition to being the necessary impetus for seeking professional assistance.

O objetivo deste estudo foi revisar na literatura científica os artigos que investigam o papel das mães, dos pais e das famílias no tratamento da obesidade dos filhos. Buscou-se artigos originais nas plataformas Bireme (BVS) e Pubmed (Medline) e na base de dados Scielo, entre os anos de 2004 a 2010, com os descritores "the role of parents" and "childhood obesity", "the role of parents" and "child obesity treatment", "the mothers role" and "childhood obesity"; "the mothers" role" and "child obesity treatment", e em português. Foram selecionados 20 estudos, divididos em duas categorias temáticas.Verificou-se que há implicações do papel da familia, pai ou mãe na obesidade das crianças e mais especificamente, dos fatores relacionados ao papel das mães. Identificou-se como fundamental o papel dos pais, mães e familiares no sentido de promover comportamentos e estilos de vida saudável. A percepção materna distorcida faz com que o excesso de peso seja percebido como normal e isso pode prejudicar o tratamento. O reconhecimento do excesso de peso das crianças possivelmente poderá promover uma melhora na adesão e, além disso, pode ser o requisito necessário para a procura de ajuda profissional.

The goal of this study is to review articles in the scientific literature investigating the role of mothers, fathers and relatives in the treatment of obesity of their children. A search for original articles was conducted in the BIREME (BVS), PUBMED (MEDLINE) and Scielo platforms from 2004 to 2010, using the key words "the role of parents" and "childhood obesity," "the role of parents" and "child obesity treatment," "the mother's role" and "childhood obesity," "the mothers role" and "child obesity treatment." Twenty papers were selected and divided into two thematic categories. It was revealed that there are implications of the role of family, namely the father or mother, on the obesity of children, and more specifically related to the role of mothers. The conclusion drawn is that the role of parents and relatives is fundamental in promoting healthy behavior and lifestyles. Distorted maternal perception leads to excess weight being perceived as normal and this may prejudice treatment of child obesity. Acknowledging that the children are overweight most probably promotes greater acceptance of the need for treatment, in addition to being the necessary impetus for seeking professional assistance.

O cultivo e a deposição de resíduos de plantas de cobertura em sistema plantio direto podem afetar os atributos químicos do solo e a produção de cebola. O trabalho objetivou avaliar a interferência do cultivo de plantas de cobertura sobre a produção de cebola e sobre os atributos químicos do solo em sistema plantio direto (SPD) agroecológico. O experimento foi conduzido na EPAGRI, em Ituporanga (SC), em um Cambissolo Húmico, nas safras de 2010 e 2011. Em abril, foram implantados os tratamentos: testemunha com vegetação espontânea (T1); cevada (2010)/aveia-preta (2011) (T2); centeio (T3); nabo-forrageiro (T4); centeio + nabo-forrageiro (T5); e cevada (2010)/aveia-preta (2011) + nabo-forrageiro (T6). Aos 60, 80 e 95 dias após a semeadura (DAS) das espécies de inverno, coletou-se a parte aérea das plantas e determinou-se a produção de matéria seca por hectare. Em julho, foram transplantadas mudas de cebola e, em novembro, avaliou-se a produção. Após o acamamento das plantas de cobertura de inverno e a colheita da cebola, foi coletado solo na camada de 0-10 cm e submetido à análise de atributos químicos. O cultivo e a deposição dos resíduos de matéria seca das espécies de plantas de cobertura em SPD contribuíram para o aumento e a manutenção da produção total de cebola ao longo dos anos. Os atributos químicos do solo, com exceção do K trocável, P disponível e valores de saturação da CTCpH7,0 por bases não foram afetados pelo cultivo de plantas de cobertura.

The cultivation and deposition of waste from cover crops in no-tillage can affect soil chemical attributes and onion yield. The aim of this study was to evaluate the dry matter yield of plant species from winter cover crops, onion yield and chemical attributes of soil in agroecological no-tillage system. The experiment was carried out at EPAGRI Experimental Station in Ituporanga (SC) under Humic Haplumbrept in the agricultural years of 2010 and 2011. The following treatments was implanted in April: weed vegetation (T1), Hordeum vulgare L. (2010)/Avena strigosa L. (2011) (T2), Secale cereale L. (T3), Raphanus sativus L. (T4), Secale cereale L + Raphanus sativus L. (T5) e Hordeum vulgare L. (2010)/Avena strigosa L. (2011) + Raphanus sativus L. (T6). At 60, 80 and 95 days after sowing (DAS) of winter species, the cover crops were collected to determine the dry matter yield. In July the onion seedlings were transplanted and in November the yield was evaluated. After the rolling of winter cover crops and after onion harvest, soil was collected at 0-10cm for the evaluation of chemical attributes. The cultivation and deposition of waste from cover crops in no-tillage contributed to the growth and maintenance of the total production of onion over the years. The soil chemical attributes in 0-10cm layer, with the exception of exchangeable K, available P and CTCpH7,0 saturation values for bases, were not affected by cover crops cultivation and deposition of waste.

O objetivo deste estudo piloto foi avaliar a eficácia do uso de uma terapia cognitivo comportamental (TCC) e da amitriptilina, um antidepressivo tricíclico, no tratamento de pacientes portadores de disfunções temporomandibulares (DTM) crônicas. Quarenta e sete mulheres (com 35,4 anos em média) diagnosticadas com DTM crônica foram selecionadas e divididas em 4 grupos: amitriptilina; amitriptilina + TCC; placebo + TCC; e placebo (controle) e controle. As pacientes foram submetidas às terapias por 7 semanas consecutivas. As reavaliações aconteceram 1, 7 e 11 semanas após o início da terapia (11 semanas de avaliações). Foram avaliados a presença e severidade de dor, o nível de depressão, a qualidade de vida e do sono. Os dados foram avaliados através de ANOVA, Qui-quadrado e teste de Cochran, considerando um nível de significância de 5%. Foram observadas melhoras significantes em todos os fatores avaliados para todos os grupos, porém não foram observadas diferenças entre os grupos. Após o final da terapia, os resultados positivos persistiram apenas para o grupo amitriptilina + TCC. Os resultados sugerem que o uso associado de amitriptilina e TCC no tratamento de pacientes portadores de DTM crônicas pode ser efetivo na melhora da dor, nível de depressão, qualidade de vida e do sono.

The aim of this pilot study was to evaluate the effectiveness of cognitive-behavioral therapy (CBT) and use of amitriptyline, a tricyclic antidepressant, in patients with chronic temporomandibular disorders (TMD). Forty-seven women (mean age = 35.4 years old) with chronic TMD were enrolled in the study and divided into 4 groups: amitriptyline; amitriptyline and CBT; placebo and CBT; and placebo only (control). Patients were managed for 7 consecutive weeks. Follow-up evaluations were done at the 1st, 7th and 11th weeks of treatment. The presence and severity of pain, levels of depression, and quality of life and sleep were measured. Data were analyzed using ANOVA, Chi-square and Cochran tests, considering a significance level of 5%. Improvements were found for all factors considered in the intragroup analysis, although no significant differences were detected among groups. However, at the end of the treatment (11 weeks of follow-up), these positive outcomes persisted only for the women treated with amitriptyline and CBT. The obtained results suggest that the combination of amitriptyline and CBT may be effective in reducing pain and depression levels as well as in improving the quality of life and sleep in patients with chronic TMD.

We present in this work an experimental investigation of the effect of temperature (from 25 to 180 ºC) in the electro-oxidation of ethanol on platinum in two different phosphoric acid concentrations. We observed that the onset potential for ethanol electro-oxidation shifts to lower values and the reaction rates increase as temperature is increased for both electrolytes. The results were rationalized in terms of the effect of temperature on the adsorption of reaction intermediates, poisons, and anions. The formation of oxygenated species at high potentials, mainly in the more diluted electrolyte, also contributes to increase the electro-oxidation reaction rate.