Abstract Introduction Scientific studies in Brazil grew around 10.7% compared to previous years. However, the level of quality of evidence has been decreasing. The aim in our study is to examine the meeting abstracts of the Brazilian congress of coloproctology and analyze the level of evidence in trends and variables. Methods A descriptive bibliometric study, working with secondary data to review scientific abstracts in the annals of the coloproctology congress from 2015 to 2019. Results A total of 1756 abstracts of the Brazilian Congress of Coloproctology were analyzed for 5 years (2015-2019). There was a higher trend of abstracts presented with lower levels of evidence (level of evidence 5: 52.3% and 3: 30%), being the majority composed of case reports (49.4%) and retrospective studies (30.4%). The last two years analyzed (2018: 55.2% and 2019: 59.3%) had a predominance above average of case reports. From 2017 to 2019 there was a significant decrease in the number of level 2 evidence studies (18.10%,11.80% and 5.50%), while the number of studies with level 5 evidence showed an increase (45.60%, 56.60% and 61.40%). Statistical analysis occurred in only 17%, with an important decrease for the last two years (2018: 13.6%; 2019: 12.1%). Conclusions Although the data of this study is from the Brazilian coloproctology point of view, they are important for the global scientific community, as they allow a quantitative evaluation of the relative contribution from the level of evidence of Brazilian coloproctology researchers to the scientific scenario.

Abstract Objective To analyze the follow-up, in specialized outpatient clinics, of infants reported with congenital syphilis during the penicillin shortage. Method A cross-sectional study was carried out in ten public maternity hospitals affiliated with the Brazilian Unified Health System in the city of Fortaleza, state of Ceará. Clinical records of infants reported with congenital syphilis who were born alive in 2015 were used to describe correlates of attendance at recommended clinical follow-up appointments. Results A total of 469 infants reported with CS from January 1/2015 to December 31/2015 were included in the analysis. The results show that most infants did not attend the follow-up visits (368/469, 78.5%) and the main associated factors are that the follow-up clinic is located in a different hospital from that where the infant was born (OR: 3.7; CI: 2.20-6.22; p< 0.001) and the use of illicit drugs by the mother (OR: 3.2; CI: 1.57-6.87; p= 0.002). Only 33.7% (34/101) were followed until discharge. Conclusion The majority of infants with reported congenital syphilis during this period did not attend the follow-up visits. Public health efforts aimed at reaching the parents of infants with CS should be a priority to ensure appropriate clinical identification and management of the associated outcomes of this vertically transmitted infection.

Abstract Introduction The presentation of abstracts in a congress is an important step for the dissemination of scientific information. The American Congress of Coloproctology is promoted by the American Society of Colon & Rectal Surgeons (ASCRS), and it is the largest in number of participants within the specialty, followed by the Brazilian Congress of Coloproctology. The present study aims to evaluate variables related to the quality of the scientific production of the abstracts presented in these two events and their conversion rate to published manuscripts. Materials and Methods The present bibliometric study assesses secondary data from the review of abstracts presented in these 2 important conferences in 2016, followed by a research of the publications from these congress presentations. Results The total number of abstracts evaluated was 854. The rate of articles containing statistical analyses was of 73.7% in the American congress, and of 34.1% in the Brazilian congress. Multicentric studies were more prevalent in the American congress (23.1%). Regarding study design, the most common were case reports in the Brazilian (44.8%) congress and retrospective studies in the American congress (67.7%). As for the works presented, the rate of conversion into full manuscripts in the American congress was of 24.2% compared with 10.6% in the Brazilian congress. Most papers from the American congress (93.7%) have citations compared with 68.6% of the other event evaluated. Conclusion The scientific performance demonstrated by the conversion rate of abstracts into publications is below ideal, mainly in relation to the Brazilian meeting; yet, there were significant differences between the two events in terms of the profile of the presentations and several variables analyzed.

This work describes a green synthesis, the characterization, and biological evaluation of silver nanoparticles (AgNPs). The AgNPs suspension was synthesized using aqueous leaf extract of Eucalyptus grandis, which presented a characteristic band at 407 nm in the UV-Vis spectrum. The AgNPs presented a spherical shape and size of 9.7 ± 0.3 nm. The nanoparticles were stable over a month, indicating that E. grandis’ extract is suitable for their preparation and stabilization. The X-ray analysis showed that the crystallinity of AgNPs corresponded to the centered face phase of silver. The antibacterial and leishmanicidal activities of AgNPs were evaluated. The AgNPs presented antibacterial activity on the Gram-negative bacteria Escherichia coli at 53.9 µg mL-1. The leishmanicidal activity evaluation against promastigote forms of Leishmania infantum, Leishmania amazonensis, and Leishmania braziliensis showed that the biological response is dependent on the volume of AgNP suspension. It was demonstrated that L. infantum was more sensitive to the nanoparticle’s treatment than L. amazonensis and L. braziliensis. The treatment of L infantum promastigotes with 150 µL of AgNP suspension reduced parasite growth by 67.9%, a result which was similar to the treatment with 1 (66.7%) or 2 µL (70.6%) of amphotericin B used as a positive control.

Abstract The purpose of the research is to analyze socioeconomic inequality in the distribution of obesity, which is not only a disease, but also a social and economic phenomenon. In the article, the objective is to investigate the factors that make adult men and women have different probabilities of being obese in Brazil. Initially, obese individuals are identified using the Relative Fat Mass (RFM). Then, the Probit model is estimated, and Fairlie decomposition is subsequently applied. In general, the coefficients obtained are satisfactory and statistically significant. The main results indicate that women are more likely to be obese than men. The income, marital status, leisure-time physical activity, consumption of beans, alcoholic beverages and cigarettes have the greater relationship with gender inequality in obesity.

Resumo O objetivo do referente trabalho é o de analisar a obesidade, realizando uma abordagem acerca da desigualdade socioeconômica associada a essa morbidade, dado que a obesidade não é apenas uma doença, constituindo-se também como um fenômeno social e econômico. O artigo investiga os fatores que fazem homens e mulheres adultos terem probabilidades distintas de serem obesos no Brasil. Inicialmente, são identificados os indivíduos obesos, a partir da medida de Massa Gorda Relativa (RFM). Em seguida, estima-se o modelo Probit, com a posterior aplicação da decomposição de Fairlie. Os coeficientes obtidos, em geral, exibem os sinais esperados e são estatisticamente significativos. Os principais resultados apontam que as mulheres possuem maiores chances de serem obesas, com a renda, estado civil, atividade física no lazer, consumo de feijão, bebida alcoólica e cigarro sendo variáveis que apresentam maior relação com a desigualdade de gênero na obesidade.

Resumo: A biodiversidade alimentar é caracterizada pela diversidade alimentar que compõe um ecossistema local, regional ou nacional. O Brasil tem 20% de toda a biodiversidade do planeta e os biomas mais ricos do mundo. No entanto, é relevante descrever a participação desses alimentos na dieta dos brasileiros. Utilizando uma amostra complexa com dados de 57.920 domicílios, coletados pelo Instituto Brasileiro de Geografia e Estatística de 2017 a 2018, observou-se que, com exceção da erva-mate, a disponibilidade de alimentos provenientes da biodiversidade é baixa, representando uma média de 7,09g/per capita/dia. Por biomas, a Caatinga apresentou a maior disponibilidade de frutos (4,20g/per capita/dia), enquanto para legumes, a Amazônia se destacou (1,52g/per capita/dia). Os resultados são insatisfatórios e abaixo do que se espera de um território biodiverso e de um sistema alimentar que é destaque mundial. É necessário um maior comprometimento para a promoção de ações que fortaleçam o consumo desses alimentos entre brasileiros.

Resumen: La biodiversidad alimentaria se caracteriza por la diversidad alimentaria que conforma un ecosistema local, regional o nacional. Brasil tiene el 20% de toda la biodiversidad del planeta y los biomas más ricos del mundo. Sin embargo, es relevante describir la participación de estos alimentos en la dieta de los brasileños. Utilizando una muestra compleja con datos de 57.920 domicilios, recopilados por el Instituto Brasileño de Geografía y Estadística de 2017 a 2018, se observó que, con excepción de la yerba mate, la disponibilidad de alimentos de la biodiversidad es baja, representando un promedio de 7,09g/per cápita/día. Por biomas, la Caatinga presentó la mayor disponibilidad de frutos (4,20g/per cápita/día), mientras que en relación a las legumbres, la Amazonía se destacó (1,52g/per cápita/día). Los resultados son insatisfactorios y por debajo de lo que se espera de un territorio rico en biodiversidad y un sistema alimentario mundialmente reconocido. Es necesario un mayor compromiso para la promoción de acciones que fortalezcan el consumo de estos alimentos entre los brasileños.

Abstract: Food biodiversity is characterized by the diversity of foods that compose a local, regional, or national ecosystem. Brazil has 20% of all the planet’s biodiversity and the richest biomes in the world. Therefore, describing the participation of these foods in the Brazilian diet is relevant. Using a complex sample with data from 57,920 households collected by the Brazilian Institute of Geography and Statistics from 2017 to 2018, this study showed that, except for yerba mate, the availability of foods from Brazilian biodiversity is low, representing an average of 7.09g/per capita/day. Regarding biomes, the Caatinga had the highest availability of fruits (4.20g/per capita/day) while the Amazon had the highest availability of vegetables (1.52g/per capita/day). The results are unsatisfactory and lower than what is expected from a territory rich in biodiversity and a world-leading food system. A greater commitment is essential to promote actions that strengthen the consumption of these foods among Brazilians.

Abstract Adenosine is an important regulator within the cardiovascular system and modulates various processes through four distinct G protein-coupled receptors (A1, A2A, A2B, and A3), causing hypotension and reduced renal blood flow, which contributes to ischemia tissue and organ dysfunction. Caffeine causes most of its biological effects by blocking adenosine receptors. Although caffeine is vastly used as a pharmacological tool in basic research, there is a lack of studies characterizing the caffeine doses necessary for blocking the cardiovascular effects of adenosine. Therefore, we evaluated the effect of different doses of caffeine (10, 30 and 100 mg/kg, s.c) on the cardiovascular changes induced by adenosine. In addition, the adenosine response was evaluated at different times (4 and 8 hours) after caffeine administration. The bolus injection of increasing doses of adenosine dose-dependently reduced blood pressure, renal blood flow and heart rate. The dose of 30 mg/kg was the most effective in blocking adenosine-induced cardiovascular events. However, the higher dose of caffeine (100 mg/kg) fails to block the adenosine effect on heart rate. The effect of caffeine lasts for 4 hours. Therefore, caffeine in the dose of 30 mg/kg can block the effects of adenosine for up to 4 hours. These data provide valuable information on the dose and frequency of caffeine administration for future studies in rats.

ABSTRACT BACKGROUND: Previous studies have shown a relationship between calf circumference (CC) and outcomes in hospitalized patients. AIMS: To investigate the relationship between CC and clinical and nutritional outcomes in older in-patients (OiP) in a surgery ward. METHODS: This was a cross-sectional study with 417 OiP in a surgery ward. Clinical variables, anthropometry, and nutritional screening instruments such as subjective global assessment (SGA), mini nutritional assessment (MNA), and nutritional risk screening (NRS) were used in the investigation. The tests Pearson’s chi-square, Mann-Whitney, Kruskal-Wallis, and Spearman’s coefficient, and multiple linear regression analyses were used to review the factors associated with CC. RESULTS: Lower CC values were found in the age group 80 years and over (p<0.0001), presence of complications (p=0.0269), NRS (p<0.0001), SGA (p<0.0001), and MNA (p<0.0001). Gender (p=0.0011; partial R2=0.01151), age (p=0.0002; partial R2=0.06032), body mass index (p≤0.0001; partial R2=0.40820), and arm circumference (p≤0.0001; partial R2=0.11890) are variables that together were associated with CC. There was also a relationship between SGA (p=0.0166; partial R2=0.00605) and absence of complications during hospitalization (p=0.0047; R2=0.01154) with CC. CONCLUSIONS: Gender, age, body mass index, and arm circumference were jointly associated with CC, in addition to SGA and absence of complications. The CC is a relevant indicator for OiP in the clinical practice.

RESUMO RACIONAL: Estudos anteriores mostraram uma relação entre a circunferência da panturrilha (CP) e desfechos em pacientes hospitalizados. OBJETIVOS: Investigar a relação entre CP e desfecho clínico e nutricional em pacientes idosos hospitalizados (PIH) em uma enfermaria cirúrgica. MÉTODOS: Este foi um estudo transversal com 417 PIH em uma enfermaria de cirurgia. Variáveis clínicas, antropometria e instrumentos de triagem nutricional como avaliação subjetiva global (ASG), mini avaliação nutricional (MAN) e triagem de risco nutricional (NRS) foram utilizados na investigação. Qui-quadrado, Mann-Whitney, Kruskal-Wallis, coeficiente de Spearman e análise de regressão linear múltipla foram usados para analisar os fatores associados a CP. RESULTADOS: Menores valores de CP foram encontrados na faixa etária de 80 anos (p<0,0001), complicações (p=0,0269), risco nutricional pelo NRS (p<0,0001), ASG (p<0,0001) e MAN (p<0,0001). Sexo (p=0,0011; R2 parcial=0,01151), idade (p=0,0002; R2 parcial=0,06032), IMC (p≤0,0001; R2 parcial=0,40820) e circunferência do braço (CB) (p≤0,0001; R2 parcial=0,11890) foram variáveis que juntas estiveram associadas com a CP. Também houve relação entre ASG (p=0,0166; R2 parcial=0,00605) e ausência de complicações durante a internação (p=0,0047; R2= 0,01154) com a CP. CONCLUSÕES: Sexo, idade, IMC e CB associaram-se conjuntamente com CP, ASG e ausência de complicações. CP é um indicador relevante em PIH na prática clínica.

ABSTRACT Objective To investigate the expression of human papillomavirus (HPV), p16, p53, and p63 in non-schistosomiasis-related squamous cell carcinoma of the bladder and to develop an accurate and automated tool to predict histological classification based on clinicopathological features. Methods Twenty-eight patients with primary bladder pure squamous cell carcinoma who underwent cystectomy or transurethral resection of bladder tumor (TURBT) for bladder cancer between January 2011 and July 2017 were evaluated. Clinical data and follow-up information were obtained from medical records. Formalin-fixed, paraffin-embedded surgical specimens were used for immunohistochemical staining for p16, p53, and p63. Human papillomavirus detection was evaluated by PCR. Statistical analysis was performed, and statistical significance was set at p<0.05. Finally, decision trees were built to classify patients’ prognostic features. Leave-one-out cross-validation was used to test the generalizability of the model. Results Neither direct HPV detection nor its indirect marker (p16 protein) was identified in most cases. The absence of p16 was correlated with less aggressive histological grading (p=0.040). The positive p16 staining detection found only in pT1 and pT2 cases in our sample suggests a possible role for this tumor suppressor protein in the initial stages of bladder squamous cell carcinoma. The decision trees constructed described the relationship between clinical features, such as hematuria/dysuria, the level of tumor invasion, HPV status, lymphovascular invasion, gender, age, compromised lymph nodes, and tumor degree differentiation, with high classification accuracy. Conclusion The algorithm classifier approach established decision pathways for semi-automatic tumor histological classification, laying the foundation for tailored semi-automated decision support systems for pathologists.

ABSTRACT Objectives: to develop interactive gerontechnology for the prevention of falls in the elderly at home. Methods: an exploratory and descriptive study that consisted of gerontechnology development and evaluation by experts and the target audience. For evaluation, researchers used the Agreement Index (AI), considering values greater than 80%. Results: the three-dimensional virtual scale model was elaborated through the SketchUp program, with the distribution of rooms and floors, constituting Prototype 1 (P1). Fifty-four judges evaluated the P1, and all presented agreement above the established, with a minimum AI of 88% and a maximum of 100%, producing Prototype 2 (P2). Thirty elderly participants from a philanthropic institution evaluated Prototype 2. On all items, AI ranged from 83% a 100%, resulting in the final version. Conclusions: the product of this research reveals itself as an innovative and scientifically based tool aimed at preventing falls in the elderly.

RESUMEN Objetivos: desarrollar gerontecnología interactiva para prevención de caídas en ancianos en el domicilio. Métodos: estudio exploratorio y descriptivo que consistió en el desarrollo de la gerontecnología y evaluación por especialistas y por público objetivo. Para evaluación, utilizado el Índice de Concordancia (IC), considerando valores mayores que 80%. Resultados: elaborado la maqueta tridimensional virtual mediante el programa SketchUp, con la distribución de las habitaciones y pisos, constituyendo el Prototipo 1 (P1). El P1 fue evaluado por 54 jueces, y todos presentaron concordancia arriba del establecido, con IC mínimo de 88% y máximo de 100%, produciendo el Prototipo 2 (P2). Esto fue sometido a la evaluación por 30 ancianos participantes de institución filantrópica. En todos los ítems, el IC varió de 83% a 100%, resultando en la versión final. Conclusiones: el producto de esta investigación se revela como herramienta innovadora y científicamente fundamentada objetivando a la prevención de caídas en personas ancianas.

RESUMO Objetivos: desenvolver gerontecnologia interativa para prevenção de quedas em idosos no domicílio. Métodos: estudo exploratório e descritivo que consistiu no desenvolvimento da gerontecnologia e avaliação por especialistas e pelo público-alvo. Para avaliação, utilizou-se o Índice de Concordância (IC), considerando valores maiores que 80%. Resultados: elaborou-se a maquete tridimensional virtual por meio do programa SketchUp, com a distribuição dos cômodos e andares, constituindo o Protótipo 1 (P1). O P1 foi avaliado por 54 juízes, e todos apresentaram concordância acima do estabelecido, com IC mínimo de 88% e máximo de 100%, produzindo o Protótipo 2 (P2). Este foi submetido à avaliação por 30 idosos participantes de instituição filantrópica. Em todos os itens, o IC variou de 83% a 100%, resultando na versão final. Conclusões: o produto desta pesquisa se revela como ferramenta inovadora e cientificamente fundamentada visando à prevenção de quedas em pessoas idosas.

Abstract Background The Good Practices in Cardiology Program is an initiative created by the Brazilian Society of Cardiology (SBC) to improve the quality of care of cardiovascular disease patients in Brazilian public hospitals. Objectives To characterize patients admitted to a tertiary public hospital with diagnosis of acute coronary syndrome (ACS) or heart failure (HF) and to evaluate performance indicators in both ACS and HF arms, with a pre-established target of 85% adherence to the SBC recommendations. Methods This was a descriptive cross-sectional study through data collection of patients hospitalized between May 2016 and September 2019. Results A total of 1,036 patients were included, 273 in the HF arm and 763 in the ACS arm. Mean age was 59.8 ± 12.0 years in the ACS and 57.0 ± 14.1 years in the HF, with a predominance of male patients in both groups. More than half of patients had some primary education and more than 90% reported a monthly income of less than five minimum wages. In ACS, the diagnosis of ACS with ST segment elevation was predominant (66.3%), and 2.9% of patients died. In HF, the most common etiology was Chagas disease (25.8%), and 17.9% died. Analysis of the performance indicators revealed an adherence rate higher than 85% to nine of the 12 indicators. Conclusion Quality programs are essential for improvement of quality of care. Performance indicators pointed to a good adherence to the SBC guidelines, mainly in the ACS arm.

Resumo Fundamento O Programa Boas Práticas em Cardiologia é uma iniciativa da Sociedade Brasileira de Cardiologia (SBC) destinada à melhoria do cuidado cardiovascular nos hospitais públicos brasileiros. Objetivos Descrever características dos pacientes internados com Síndrome Coronariana Aguda (SCA) e Insuficiência Cardíaca (IC) e avaliar os indicadores de desempenho alcançados nos braços (SCA e IC) em um hospital público terciário, com uma meta pré-estabelecida de 85% de aderência às recomendações da SBC. Métodos Estudo do tipo transversal descritivo realizado por meio da coleta de dados de pacientes que estiveram internados entre maio de 2016 e setembro de 2019. Resultados Foram incluídos 1036 pacientes, 273 pacientes no braço IC e 763 no braço SCA. A média de idade foi de 59,8 ± 12,0 anos na SCA e 57,0 ± 14,1 anos na IC, com predomínio do sexo masculino em ambos os grupos. Mais da metade dos pacientes não tinham ensino fundamental completo e mais de 90% declararam renda mensal inferior a cinco salários-mínimos. Na SCA, predominou o diagnóstico de SCA com supradesnivelamento do segmento ST (66,3%) e 2,9% dos pacientes foram a óbito. Na IC, a etiologia mais comum foi a Doença de Chagas (25,8%) e 17,9% dos pacientes foram a óbito. Na avaliação dos indicadores de desempenho, nove dos 12 indicadores tiveram taxas de aderência acima de 85%. Conclusão Programas de qualidade são essenciais à melhoria do cuidado e os indicadores de desempenho do hospital apontam para uma boa adesão às diretrizes assistenciais da SBC, particularmente no braço da SCA.

Abstract: Introduction: Health Sciences university students were especially affected by the Sars-CoV-2 virus pandemic. The anxieties intrinsically related to Covid-19 were added to the impacts related to the changes that have taken place in academic institutions, particularly the change to online teaching, a methodology that can generate discomfort for students, in addition to several obstacles related to teaching and learning, which can have important traumatic effects on the mental health of this population. Objective: To assess the mental health burden caused by the COVID-19 pandemic, as a traumatic event capable of triggering psychiatric disorders, such as Post-Traumatic Stress Disorder (PTSD), in university students. Methods: This is a cross-sectional and quantitative study, of analytical-descriptive nature, carried out by filling out an anonymous digital form, initiated after prior approval by the Research Ethics Committee. The subjects were students of Biological and Health Sciences at a State University located in the southeastern region of Brazil. The sample consisted of 618 students. Results: 618 forms were answered by students attending the courses of Physical Education (28.8%), Medicine (25.4%), Dentistry (18.1%), Biological Sciences (15.2%) and Nursing (12.5%). The presence of post-traumatic stress symptoms assessed by the Impact of Event Scale - Revised (IES-R) obtained a prevalence of 32.7% (n = 202) among university students from Biological and Health Sciences courses. Conclusions: There was a significant impact on the mental health of university students, with the presence of depressive symptoms, anxiety and stress above those found in the scientific literature and, consequently, a high prevalence of PTSD.

Resumo: Introdução: Os universitários de Ciências da Saúde se tornaram especialmente afetados pela pandemia do vírus Sars-CoV-2. As angústias intrinsicamente relacionadas à Covid-19 foram somadas aos impactos referentes às mudanças acontecidas nas instituições acadêmicas, particularmente a mudança para o ensino on-line, uma metodologia que pode gerar desconforto aos estudantes, além de vários obstáculos relacionados ao ensino e à aprendizagem, o que pode ter repercussões traumáticas importantes na saúde mental dessa população. Objetivo: Este estudo teve como objetivo verificar a carga mental provocada pela pandemia da Covid-19, como um evento traumático ao ponto de desencadear transtornos psiquiátricos, como o transtorno do estresse pós-traumático (Tept), em universitários. Método: Trata-se de um estudo transversal e quantitativo, com orientação analítico-descritiva, mediante preenchimento de formulário digital anônimo, iniciado após prévia aprovação do Comitê de Ética em Pesquisa. Os sujeitos foram estudantes de Ciências Biológicas e da Saúde de uma universidade estadual localizada na Região Sudeste do Brasil. A amostra foi constituída por 618 estudantes. Resultado: Foram respondidos 618 formulários pelos estudantes que pertenciam aos cursos de Educação Física (28,8%), Medicina (25,4%), Odontologia (18,1%), Ciências Biológicas (15,2%) e Enfermagem (12,5%). A presença de sintomas de estresse pós-traumático verificados pela Escala de Impacto do Evento-Revisada (IES-R) obteve prevalência de 32,7% (n = 202) entre os estudantes universitários das Ciências Biológicas e da Saúde. Conclusão: Houve impacto significativo na saúde mental dos universitários com presença de sintomas depressivos, ansiedade e estresse acima dos encontrados na literatura científica, e, consequentemente, constatou-se alta na prevalência do Tept.

Abstract: Food biodiversity is characterized by the diversity of foods that compose a local, regional, or national ecosystem. Brazil has 20% of all the planet’s biodiversity and the richest biomes in the world. Therefore, describing the participation of these foods in the Brazilian diet is relevant. Using a complex sample with data from 57,920 households collected by the Brazilian Institute of Geography and Statistics from 2017 to 2018, this study showed that, except for yerba mate, the availability of foods from Brazilian biodiversity is low, representing an average of 7.09g/per capita/day. Regarding biomes, the Caatinga had the highest availability of fruits (4.20g/per capita/day) while the Amazon had the highest availability of vegetables (1.52g/per capita/day). The results are unsatisfactory and lower than what is expected from a territory rich in biodiversity and a world-leading food system. A greater commitment is essential to promote actions that strengthen the consumption of these foods among Brazilians.

Resumen: La biodiversidad alimentaria se caracteriza por la diversidad alimentaria que conforma un ecosistema local, regional o nacional. Brasil tiene el 20% de toda la biodiversidad del planeta y los biomas más ricos del mundo. Sin embargo, es relevante describir la participación de estos alimentos en la dieta de los brasileños. Utilizando una muestra compleja con datos de 57.920 domicilios, recopilados por el Instituto Brasileño de Geografía y Estadística de 2017 a 2018, se observó que, con excepción de la yerba mate, la disponibilidad de alimentos de la biodiversidad es baja, representando un promedio de 7,09g/per cápita/día. Por biomas, la Caatinga presentó la mayor disponibilidad de frutos (4,20g/per cápita/día), mientras que en relación a las legumbres, la Amazonía se destacó (1,52g/per cápita/día). Los resultados son insatisfactorios y por debajo de lo que se espera de un territorio rico en biodiversidad y un sistema alimentario mundialmente reconocido. Es necesario un mayor compromiso para la promoción de acciones que fortalezcan el consumo de estos alimentos entre los brasileños.

Resumo: A biodiversidade alimentar é caracterizada pela diversidade alimentar que compõe um ecossistema local, regional ou nacional. O Brasil tem 20% de toda a biodiversidade do planeta e os biomas mais ricos do mundo. No entanto, é relevante descrever a participação desses alimentos na dieta dos brasileiros. Utilizando uma amostra complexa com dados de 57.920 domicílios, coletados pelo Instituto Brasileiro de Geografia e Estatística de 2017 a 2018, observou-se que, com exceção da erva-mate, a disponibilidade de alimentos provenientes da biodiversidade é baixa, representando uma média de 7,09g/per capita/dia. Por biomas, a Caatinga apresentou a maior disponibilidade de frutos (4,20g/per capita/dia), enquanto para legumes, a Amazônia se destacou (1,52g/per capita/dia). Os resultados são insatisfatórios e abaixo do que se espera de um território biodiverso e de um sistema alimentar que é destaque mundial. É necessário um maior comprometimento para a promoção de ações que fortaleçam o consumo desses alimentos entre brasileiros.

ABSTRACT Introduction: the presentation of research at a congress is an interesting means for scientific dissemination, but only with publication in an indexed journal does the data become accessible and disseminated. The conversion rate in published articles of abstracts presented at congresses is an indicator to assess the scientific quality of those events. The aim of this study is to evaluate bibliometric characteristics of abstracts presented at the Brazilian Congress of Coloproctology and to determine the factors that affect publication rates. Methods: Retrospective evaluation of all abstracts presented at the Brazilian Congresses of Coloproctology from 2015 to 2019. Multiple databases were analyzed to estimate the conversion rate of the presented papers, as well as variables associated with the conversion of abstracts into full manuscripts through bivariate analysis and multivariate variables of these predictors. Results: 1756 abstracts were analyzed. Most studies are retrospective, series or case reports, and even personal experience. The conversion rate was 6.9%. The presence of statistical analysis was twice as high for published abstracts as for unpublished ones. Conclusion: the data presented demonstrate a low scientific productivity of the specialty, since the research carried out is, for the most part, not published as complete manuscripts. The predictors of publication of abstracts were: multicenter studies, studies with statistical analysis, study designs with a higher level of evidence and studies awarded by the congress.

RESUMO Introdução: a apresentação de pesquisas em um congresso é meio interessante para disseminação científica, porém apenas com a publicação em revista indexada é que os dados se tornam acessíveis e disseminados. A taxa de conversão em artigos publicados de resumos apresentados em congressos é um indicador para avaliar a qualidade científica de seus eventos. O objetivo deste estudo é avaliar características bibliométricas dos resumos apresentados no Congresso Brasileiro de Coloproctologia e determinar os fatores que afetam as taxas de publicação. Métodos: avaliação retrospectiva de todos os resumos apresentados nos Congressos Brasileiros de Coloproctologia dos anos de 2015 a 2019. Análise de múltiplas bases de dados para estimar a taxa de conversão dos trabalhos apresentados, assim como variáveis associadas à conversão dos resumos em manuscritos completos através de análises bivariadas e multivariadas desses preditores. Resultados: foram analisados 1756 resumos. A maioria dos estudos são retrospectivos, séries ou relatos de casos e até experiência pessoal. A taxa de conversão foi de 6,9%. A presença de análise estatística foi o dobro para os resumos publicados frente aos não publicados. Conclusão: os dados apresentados demonstram uma baixa produtividade científica da especialidade, já que as pesquisas realizadas não são publicadas, em sua maioria, como manuscritos completos. Os fatores preditores de publicação dos resumos foram: estudos multicêntricos, estudos contendo análise estatística, desenhos de estudo de maior nível de evidência e estudos premiados pelo congresso.

The elastic wave attenuation in artificial composites, known as phononic crystals (PnCs), is an important topic in the context of wave manipulation. However, there is a lack of knowledge in the obtainment of the wave attenuation of PnCs when the viscoelastic effect of different polymers is considered. In this study, the complex band structure of longitudinal waves in 1-D viscoelastic PnC (VPnC) rods composed by steel inclusions (elastic material) in a polymeric matrix (viscoelastic material) is investigated. The viscoelastic effect is modelled by the standard linear solid model (SLSM), which can be used to closely model the behavior of polymers for practical applications. It is also studied the influence of different polymers (i.e., epoxy, nylon, silicon rubber, natural rubber, and low density polyethylene (LDPE)) on the complex band structure of 1-D VPnC rods. The improved plane wave expansion (IPWE) and extended plane wave expansion (EPWE) are used to compute the band structure. It is observed that the viscoelastic effect influences significantly both the propagating and evanescent waves. The viscoelasticity increases the unit cell wave attenuation for most range of frequency considering all polymeric matrices. The highest unit cell wave attenuation is for the polymeric matrix of natural rubber.