Effect of Glycerol and Sisal Nanofiber Content on the Tensile Properties of Corn Starch/Sisal Nanofiber Films.

Currently, petroleum-derived plastics are widely used despite the disadvantage of their long degradation time. Natural polymers, however, can be used as alternatives to overcome this obstacle, particularly cornstarch. The tensile properties of cornstarch films can be improved by adding plant-derived nanofibers. Sisal (Agave sisalana), a very common low-cost species in Brazil, can be used to obtain plant nanofibers. The goal of this study was to obtain sisal nanofibers using low concentrations of sulfuric acid to produce thermoplastic starch nanocomposite films. The films were produced by a casting technique using commercial corn starch, glycerol, and sisal nanofibers, accomplished by acid hydrolysis. The effects of glycerol and sisal nanofiber content on the tensile mechanical properties of the nanocomposites were investigated. Transmission electron microscopy findings demonstrated that the lowest concentration of sulfuric acid produced fibers with nanometric dimensions related to the concentrations used. X-ray diffraction revealed that the untreated fibers and fibers subjected to acid hydrolysis exhibited a crystallinity index of 61.06 and 84.44%, respectively. When the glycerol and nanofiber contents were 28 and 1%, respectively, the tensile stress and elongation were 8.02 MPa and 3.4%. In general, nanocomposites reinforced with sisal nanofibers showed lower tensile stress and higher elongation than matrices without nanofibers did. These results were attributed to the inefficient dispersion of the nanofibers in the polymer matrix. Our findings demonstrate the potential of corn starch nanocomposite films in the packaging industry.

Automatic mapping of high-risk urban areas for Aedes aegypti infestation based on building facade image analysis.

BACKGROUND: Dengue, Zika, and chikungunya, whose viruses are transmitted mainly by Aedes aegypti, significantly impact human health worldwide. Despite the recent development of promising vaccines against the dengue virus, controlling these arbovirus diseases still depends on mosquito surveillance and control. Nonetheless, several studies have shown that these measures are not sufficiently effective or ineffective. Identifying higher-risk areas in a municipality and directing control efforts towards them could improve it. One tool for this is the premise condition index (PCI); however, its measure requires visiting all buildings. We propose a novel approach capable of predicting the PCI based on facade street-level images, which we call PCINet. METHODOLOGY: Our study was conducted in Campinas, a one million-inhabitant city in São Paulo, Brazil. We surveyed 200 blocks, visited their buildings, and measured the three traditional PCI components (building and backyard conditions and shading), the facade conditions (taking pictures of them), and other characteristics. We trained a deep neural network with the pictures taken, creating a computational model that can predict buildings' conditions based on the view of their facades. We evaluated PCINet in a scenario emulating a real large-scale situation, where the model could be deployed to automatically monitor four regions of Campinas to identify risk areas. PRINCIPAL FINDINGS: PCINet produced reasonable results in differentiating the facade condition into three levels, and it is a scalable strategy to triage large areas. The entire process can be automated through data collection from facade data sources and inferences through PCINet. The facade conditions correlated highly with the building and backyard conditions and reasonably well with shading and backyard conditions. The use of street-level images and PCINet could help to optimize Ae. aegypti surveillance and control, reducing the number of in-person visits necessary to identify buildings, blocks, and neighborhoods at higher risk from mosquito and arbovirus diseases.

Caracterização, aptidão agrícola e capacidade de uso de um Argissolo Vermelho-Amarelo Eutrófico abrúptico: Estudo de caso em Itapetinga-BA / Characterization, agricultural aptitude and use capacity of 'Argissolo Vermelho-Amarelo Eutrófico abrúptico: a case study in Itapetinga -BA

No município de Itapetinga,90% das terras são ocupadas com pecuária e os Argissolos são os solos mais comuns. A pequena capacidade protetora das pastagens e também o adensamento dos rebanhos, tem causado severa compactação no solo, que se torna preocupante.Diante disso, os objetivos da pesquisa foram: i) caracterizar morfológica, física e quimicamente um Argissolo Vermelho-Amarelo; ii) indicar a aptidão agrícola e capacidade de uso. Realizou-se a caracterização morfológica do solo e coletaram-se amostras dos horizontes para caracterização física equímica. Fisicamente determinou-se a granulometria e argila dispersa em água (ADA). Quimicamente foram analisados os cátions trocáveis do complexo sortivo (Ca2+, Mg2+Na+, K+, Al3+e H+), pH, carbono, nitrogênio total e fósforo disponível,bem como, óxidos Al2O3e Fe2O3 por ataque sulfúrico. Os sistemas de Avaliação de Aptidão Agrícola das Terras e de Capacidade de Uso foram as metodologias utilizadas para essas classificações. A descrição morfológica e dados analíticos permitiram classificar o solo como Argissolo Vermelho-Amarelo Eutrófico abrúptico. Quanto à aptidão agrícola e capacidade de uso, o solo foi classificado como 1abC e IV E-3, respectivamente. Conclui-se que o uso atual está inadequado, recomendando-sepastagens perenes associadas a práticas conservacionistas que evitem a erosão do solo. O caráter abrúptico, aliado à compactação provocada pela pecuária extensiva, agrava ainda mais a perda da capacidade produtiva desse solo, condição representativa para a microrregião de Itapetinga, onde a maiorparte do seu território é coberto por Argissolos Vermelho-Amarelos Eutróficos, sendo cerca de 41%.(AU)

The livestock agriculture fromItapetinga are in area ofArgissolos. Themanagement of livestock has caused compaction. Thus, the purpose of the study was: i) describe the morphological, Chemical, and physical of the Argissolo Vermelho-Amarelo; ii) classify your agricultural aptitude and use capacity. The morphological characterization was described: depth, color, structure, texture, consistency, and transition. The physical analysis was: texture and clay dispersed in water. The Chemical analysis determined the cations (Ca2+, Mg2+ Na+, K+, Al3+ e H+), pH, carbon, nitrogen and phosphorus. The oxides Al2O3and Fe2O3were determined. The "Sistema de Avaliação de Aptidão Agrícola das Terras" and "Sistema de Capacidade de Uso" were used for classification. The soil was classified with Argissolo Vermelho-Amarelo Eutrófico abrúptico. Your aptitude has been graded as 1abC and IV E-3 to use capacity. Therefore, the use of soil is incorrect, because the perennial pasture with practices against erosion is the correct form of use. The abrupt characterwith compaction by the animals result in losses of the productive capacity of the soil.This is reality of the microregion of Itapetingabecausemost ofthe territory is in area of Argissolos Vermelho-Amarelos Eutróficos, totaling 41% of the total area.(AU)

Young people's low back pain and awareness of postural habits: A cross-sectional study.

BACKGROUND: Young people tend to spend most of their time in activities involving inappropriate positions, which can promote musculoskeletal alterations and disorders. OBJECTIVE: To investigate the prevalence of low back pain (LBP) in young people and analyse its associations with daily postural habits. METHODS: Cross-sectional and retrospective study evaluating 679 Brazilian young people (15 to 18 years old), using questionnaires about LBP and awareness of postural habits. The prevalence values were calculated for the present moment, the last three months and throughout life. The Mann-Whitney U test and the Chi-square test were applied. RESULTS: The prevalence of LBP at the present moment was 27.2%, 57.7% over the last three months and 73.9% throughout life. Boys and girls presented significantly different values, a larger number of girls manifesting pain for the three moments. The associated postural habits were: turning the body, reduction of lumbar lordosis when seated, not placing the feet on the floor, crossing the legs when sitting in the classroom and at home, sitting or lying in an inappropriate position, and distributing the body asymmetrically on the legs when standing. CONCLUSIONS: Young people from 15 to 18 years of age show a high prevalence of low back pain. Inadequate postural habits adopted during everyday activities are associated with this complaint. These findings could contribute to the implementation of prevention and rehabilitation strategies.

Effects of therapeutic and aerobic exercise programs in temporomandibular disorder-associated headaches.

OBJECTIVE: To assess the effects of three 8-week exercise programs on the frequency, intensity, and impact of headaches in patients with headache attributed to temporomandibular disorder (TMD). METHODOLOGY: Thirty-six patients diagnosed with headache attributed to TMD participated in the study and were divided into three groups of 12 patients: a therapeutic exercise program (G1, mean age: 26.3±5.6 years), a therapeutic and aerobic exercise program (G2, mean age: 26.0±4.6 years), and an aerobic exercise program (G3, 25.8±2.94 years). Headache frequency and intensity were evaluated using a headache diary, and the adverse headache impact was evaluated using the Headache Impact Test (HIT-6). The intensity was reported using the numerical pain rating scale. These parameters were evaluated twice at baseline (A01/A02), at the end of the 8-week intervention period (A1), and 8-12 weeks after the end of the intervention (A2). RESULTS: At A1, none of the G2 patients reported having headaches, in G1, only two patients reported headaches, and in G3, ten patients reported headache. The headache intensity scores (0.3 [95% CI: -0.401, 1.068]), (0.0 [95% CI: -0.734, 0.734]) and HIT-6 (50.7 [95% CI: 38.008, 63.459]), (49.5 [95% CI: 36.808, 62.259]), significantly decreased in G1 and G2 at A1. At A2 headache intensity scores (0.5 [95% CI: -0.256, 1.256]), (0.0 [95% CI: -0.756, 0.756]) and HIT-6 (55.1 [95% CI: 42.998, 67.268]), (51.7 [95% CI: 39.532, 63.802]) in G1 and G2 haven't change significantly. The effects obtained immediately after the completion of the intervention programs were maintained until the final follow-up in all groups. CONCLUSION: The programs conducted by G1 (therapeutic exercises) and G2 (therapeutic and aerobic exercise) had significant results at A1 and A2.

Effects of therapeutic and aerobic exercise programs in temporomandibular disorder-associated headaches

Abstract Objective To assess the effects of three 8-week exercise programs on the frequency, intensity, and impact of headaches in patients with headache attributed to temporomandibular disorder (TMD). Methodology Thirty-six patients diagnosed with headache attributed to TMD participated in the study and were divided into three groups of 12 patients: a therapeutic exercise program (G1, mean age: 26.3±5.6 years), a therapeutic and aerobic exercise program (G2, mean age: 26.0±4.6 years), and an aerobic exercise program (G3, 25.8±2.94 years). Headache frequency and intensity were evaluated using a headache diary, and the adverse headache impact was evaluated using the Headache Impact Test (HIT-6). The intensity was reported using the numerical pain rating scale. These parameters were evaluated twice at baseline (A01/A02), at the end of the 8-week intervention period (A1), and 8-12 weeks after the end of the intervention (A2). Results At A1, none of the G2 patients reported having headaches, in G1, only two patients reported headaches, and in G3, ten patients reported headache. The headache intensity scores (0.3 [95% CI: -0.401, 1.068]), (0.0 [95% CI: -0.734, 0.734]) and HIT-6 (50.7 [95% CI: 38.008, 63.459]), (49.5 [95% CI: 36.808, 62.259]), significantly decreased in G1 and G2 at A1. At A2 headache intensity scores (0.5 [95% CI: -0.256, 1.256]), (0.0 [95% CI: -0.756, 0.756]) and HIT-6 (55.1 [95% CI: 42.998, 67.268]), (51.7 [95% CI: 39.532, 63.802]) in G1 and G2 haven't change significantly. The effects obtained immediately after the completion of the intervention programs were maintained until the final follow-up in all groups. Conclusion The programs conducted by G1 (therapeutic exercises) and G2 (therapeutic and aerobic exercise) had significant results at A1 and A2.

O esporte e o lazer em contextos de medidas socioeducativas no Brasil: panorama e análise da produção científica / Sport and leisure in contexts of educational correctional measures in Brazil: overview and analysis of scientific production

Este estudo tem por objetivo evidenciar o panorama de pesquisas relacionadas ao esporte e o lazer em contextos de medidas socioeducativas no Brasil. Para tal, foram selecionados 9 artigos científicos e 5 dissertações através de busca nos Periódicos da CAPES, Base de dados SciELO, Google Acadêmico e Banco de Teses e Dissertações da CAPES. Os resultados das pesquisas foram analisados a partir da análise de conteúdo. Através das categorias de análise, observou-se que o esporte e o lazer, quando tratados como vias e objetos de educação, propiciam ambientes favoráveis ao desenvolvimento positivo dos adolescentes, ainda que sejam concebidos na lógica funcional e utilitarista por uma grande parte das Instituições e adolescentes. Conclui-se que o restrito entendimento dos adolescentes sobre os potenciais do esporte e do lazer está intimamente ligado a falta de acesso a essas políticas em suas trajetórias.

This study aims to highlight the panorama of research related to sport and leisure for juvenile offenders, who are in youth detention center in Brazil. Therefore, we selected 9 scientific papers and 5 Master thesis by a targeted search in the journals of CAPES, SciELO Database, Google Academics and Banco de Teses e Dissertações of CAPES. The results of the research were analyzed with the method of content analysis. Through the categories of analysis, it was observed that sport and leisure, when treated as pathways and objects of education provide environments favorable to the positive development of adolescents, although they are conceived in functional and utilitarian logic by a large part of the institutions and adolescents. It is concluding that the restricted understanding from adolescents about the potentials of sport and leisure is closely linked to the lack of access to these policies in their trajectories.

Avaliação de ansiedade e depressão pré-operatória nas cirurgias realizadas em um ospital do Sul de Santa Catarina / Evaluation of preoperative anxiety and depression in surgeries performed at a hospital in South of Santa Catarina

Introdução: O estresse do período pré-operatório pode ser capaz de aumentar os níveis de ansiedade e depressão. Essas patologias provocam uma liberação de mediadores que prejudicam a anestesia, cirurgia e recuperação pós-operatória. Objetivo: Verificar a prevalência de ansiedade e depressão no pré-operatório em pacientes internados que foram submetidos a procedimentos cirúrgicos eletivos realizados em um hospital do sul de Santa Catarina. Métodos: O presente estudo analisou 279 indivíduos que se encontravam internados, que iriam realizar procedimentos cirúrgicos eletivos e procurou identificar a prevalência destas patologias utilizando a escala HADS e um questionário de perfil sociodemográfico. Resultados: Evidenciou-se uma prevalência de 35,1% de ansiedade e 23,3% de depressão. Foi observado um predomínio dessas patologias em pacientes do sexo feminino (p=0,004 para ansiedade e p=0,012 para depressão) e indivíduos que faziam uso de medicamentos ansiolíticos. Também se constatou maiores índices de depressão em pacientes com experiência cirúrgica prévia, história de tabagismo e com 8 anos ou menos de estudo. Conclusão: Houve uma prevalência de 35,1% de ansiedade e 23,3% de depressão no período pré-operatório, sendo ambas mais comuns em mulheres. Com estes dados, torna-se recomendado a utilização de medidas para prevenção e tratamento desses distúrbios, objetivando uma maior segurança no peri e pós-operatório.

Background: Preoperative stress may be able to increase levels of anxiety and depression. These pathologies cause a release of mediators that impair the anesthesia, surgery and postoperative recovery. Objective: To verify the prevalence of preoperative anxiety and depression in hospitalized patients who performed elective surgical procedures at a hospital in south of Santa Catarina. Methods: The present study analyzed 279 individuals who were hospitalized, who would perform elective surgical procedures and sought to identify the prevalence of these pathologies using the HADS scale and a sociodemographic profile questionnaire. Results: It was found a prevalence of 35,1% of anxiety and 23,3% of depression. It was observed a predominance of these pathologies in female patients (p=0,004 for anxiety and p=0,012 for depression) and individuals who were users of anxiolytic drugs. It was also found higher rates of depression in patients with previous surgical experience, smoking history and with 8 years or less of study. Conclusion: There was a prevalence of 35,1% of anxiety and 23,3% of depression in the preoperative period, both being more common in women. With this data, it is recommended to take measures for prevention and treatment of these disorders, aiming for more safety in the perioperative and postoperative period.

Frequência de via aérea difícil em pacientes submetidos à anestesia geral em um hospital do Sul de Santa Catarina / Frequency of difficult airway tract in pacients submitted to general anesthesia in South Santa Catarina hospital

Justificativa e Objetivos: Avaliar via aérea difícil nos pacientes submetidos à ventilação e intubação orotraqueal sob anestesia geral para operações eletivas. Método: Estudo observacional com desenho transversal. Foram estudados um total de 163 pacientes, de 18 a 80 anos submetidos à ventilação sob máscara facial e intubação traqueal em operações com uso de anestesia geral. Os dados foram coletados na consulta pré-anestésica através de questionário que continha os parâmetros antropométricos e clínicos para intubação difícil. Resultados e Conclusões: Foram investigados 163 pacientes. Houve a presença de via aérea difícil em 19% dos pacientes, e a grande maioria não teve complicações. Ainda, houve uma maior frequência de via aérea difícil em pacientes com maior IMC e maior circunferência cervical, sendo ambos estatisticamente significativos. Foi observado também que quanto maior a classe do Mallampati maior a prevalência de encontrar-se uma classe maior que três na classificação de Cormack e Lehane, assim como maior a chance de se ter uma via aérea difícil, sendo significativo. Por fim, a prevalência de via aérea difícil encontrada é baixa, e quando presente geralmente está relacionado com fatores que podem ser prevenidos. As classificações quando utilizadas juntas tem maior chance de prever a via aérea difícil.

Rationale and Objectives: To evaluate difficult airway in patients submitted to ventilation and orotracheal intubation under general anesthesia for elective operations. Method: Observational study with cross-sectional design. A total of 163 patients, 18 to 80 years old undergoing ventilation under face mask and tracheal intubation in operations using general anesthesia were studied. The data were collected in the pre-anesthetic consultation through a questionnaire that contained the anthropometric and clinical parameters for difficult intubation. Results and Conclusions: 163 patients were investigated. There was a difficult airway presence in 19% of the patients, and the vast majority had no complications. Also, there was a higher frequency of difficult airway in patients with higher BMI and greater cervical circumference, both of which were statistically significant. It was also observed that the higher the Mallampati class the higher the prevalence of finding a class higher than three in the classification of Cormack and Lehane, as well as the greater the chance of having a difficult airway, being significant. Finally, the prevalence of difficult airways found is low, and when present geographically it is related to factors that can be prevented. Classifications when used together have a greater chance of predicting difficult airway.

DNA barcode reveals the illegal trade of rays commercialized in fishmongers in Brazil.

Sequences of the mitochondrial gene COI (DNA Barcode) were used to identify species of rays and skates commercialized in fishmongers in Brazil. The comparisons of the obtained sequences with previously published data available in NCBI and BOLD showed that the fish products corresponded to four species, Hypanus dipterurus, Potamotrygon motoro, Paratrygon ajereba and Gymnura altavela, the last of which is classified as vulnerable according to the IUCN Red List and therefore should not be marketed in accordance with the MMA ordinance 445/2015.

Prevalence of low back pain in young Brazilians and associated factors: Sex, physical activity, sedentary behavior, sleep and body mass index.

BACKGROUND: Low back pain (LBP) has become increasingly common, but the prevalence of this complaint and associated factors in young people remains controversial. OBJECTIVE: This study aimed to identify the prevalence of LBP and to explore the existence of associated factors (sex, physical activity, sedentary lifestyle, sleep, body mass index and waist circumference). METHODS: This study considered all complaints of the lumbar region (acute or chronic) as LBP, which can irradiate to the backside and legs, lasting a minimum of 24 hours. Youngsters aged 15 to 18 years from a school in the south of Brazil were evaluated. Descriptive statistics was used, in particular Chi-square, Mann-Whitney U tests and binary logistic regression. A significance level of p< 0.05 was adopted. RESULTS: A total of 330 youngsters answered a questionnaire and had their anthropometric measurements measured (response rate 84%). The prevalence of LBP in the present was 30%, quarterly 63% and throughout life 77%. There was a significant association between LBP and sex: girls have an increased risk of LBP in the last three-month period (PR = 1.3, 95% CI 1.06-1.56) and throughout life (PR = 1.2, 95% CI 1.04-1.43). The practice of physical activities was also associated with LBP, but as a protection factor in the present and in the last three-month period (PR = 0.7, 95% CI 0.47-0.90). Physical education at school has demonstrated a protective factor regarding LBP throughout life (PR = 0.9, 95% CI 0.77-0.97). Most of the students did not comply with recommendations related to sleep and time spent doing activities in front of a screen, and no association of these factors with LBP was detected. This exposure (physical activity, sleep time, sedentarism) did not present significant association with LBP when adjusted by the confusion factors (sex, age, BMI). CONCLUSIONS: Youngsters reported a high prevalence of LBP. Girls were at greater risk of LBP than boys. It is recommended that prevention strategies focus on the practices of physical activities and scholar physical education. No association of LBP with sedentary lifestyle (TV and computer use time, sleep time), anthropometric measures and sleeping duration was observed.

Functional activities habits in chronic stroke patients: A perspective based on ICF framework.

BACKGROUND: Functional autonomy and social inclusion are of key importance for stroke patient's rehabilitation. OBJECTIVE: To evaluate activity and participation of chronic stroke patients by means of basic (BADL), instrumental (IADL) and social (SADL) activities of daily living. METHODS: Forty individuals, 24 patients and 16 healthy individuals fill in a functional activities habits questionnaire. RESULTS: Regarding BADL, 25% of the patients did not get out of bed and 70.8% did not use toilet by themselves. Considering IADL, 29.2% of the patients did not dial the telephone, 70.8% did not wash dishes and clothes, 58.3% did not cook, 100% did not sew, 87.5% did not carry out repairs, 41.7% did not go to the bank, 54.2% did not shop and 45.8% did not write (all p < 0.05). Regarding SADL, 87.5% of the patients were not working professionally, 41.7% did not visit friends or relatives, 75% did not travel and go to the beach and 95.8% did not dance (all p < 0.05). CONCLUSIONS: Chronic stroke patients have limitations in activity and restrictions to participation, even after few years of stroke onset, particularly regarding applying knowledge, use of communication devices, domestic life, major life areas and community, social and civic life.

DNA Barcode reveals mislabelling in the identification of marine fish swimming bladders for commercialization.

Sequences of the mitochondrial gene COI (DNA Barcode) wereused to identify marine fish swimming bladders commercialized in Brazil. The comparisons of the obtained sequences of the samples registered as catfish for the commerce with previously published data available in NCBI and BOLD showed that the fish products commercialized corresponded to two Perciform species, Pogonias cromis and Micropogonias furnieri. These results besides contradicting the formal identification of the species included in the fisheries control revealed an illegal trade of one of these species, M. furnieri that is threatened and consequently have its capture prohibited.

Questionnaire on body awareness of postural habits in young people: construction and validation / Questionário de percepção corporal dos hábitos posturais de jovens: construção e validação

Abstract Introduction: The postural deviations associated with the changes in the habits of young people have increased over the last decades. Investigating the subject by way of a self-perception questionnaire allows one to understand the level of awareness the individual has concerning his/her postural habits. Objective: Designing a self-perception evaluation questionnaire about the postural habits of young people and to validate, pre-test, verify the reliability and the internal consistency of this instrument. Methods: The validity of the content was determined by 10 judges. The study involved young people (15 - 18 years old) from Florianopolis/Brazil. The questionnaire was pre-tested, applied to 15 youthful who provided qualitative information about it. The reproducibility was analyzed by way of a test-retest with 40 students, in a one-week gap, and was analyzed by interclass correlation coefficient. The internal consistency was analyzed by Cronbach's alpha with 679 students. A 5% significance level was adopted. Results: Concerning to the validation of content, the questionnaire presented a total coefficient of 0.28 and 72% concordance was observed amongst the reviewers. The interclass correlation coefficient (test-retest) indicated acceptable reproducibility values (R = 0.66, 0.74 and 0.59; p < 0.001), with a decrease in the object-carrying dimension (R = 0.32; p = 0.04). The questionnaire was considered suitable, quick and easy to fill in. The internal consistency presented a value of 0.80. Conclusion: The questionnaire on body awareness of postural habits in young people is a valid instrument with good repeatability and reliability, its use can be recommended with teenagers showing the same profile as those used in this study.

Resumo Introdução: Os desvios posturais associados às mudanças de hábitos em adolescentes vêm aumentando nas últimas décadas. Investigar por meio de questionário de autopercepção permite entender o nível de consciência que o indivíduo tem dos hábitos posturais. Objetivo: Construir um questionário de avaliação da autopercepção dos hábitos posturais de jovens, validar, pré-testar, verificar a confiabilidade e a consistência interna do instrumento. Métodos: A validade de conteúdo foi analisada por 10 juízes. O estudo envolveu jovens (15 - 18 anos) de Florianópolis/Brasil. O questionário foi pré-testado, aplicado a 15 jovens que forneceram informações qualitativas sobre ele. A reprodutibilidade foi analisada através do teste-reteste com 40 alunos, em um intervalo de 1 semana, os dados foram analisados por meio do coeficiente de correlação intraclasse. A consistência interna foi analisada por meio do Alpha de Cronbach com 679 jovens. Adotou-se nível de significância de 5%. Resultados: Na validação de conteúdo o questionário apresentou um coeficiente total de 0.28, observou-se uma concordância de 72% entre os avaliadores. O questionário foi considerado adequado, de rápido e fácil preenchimento. Os coeficientes de correlação intraclasse (teste-reteste) indicaram valores de reprodutibilidade aceitáveis (R = 0.66; 0.74 e 0.59; p < 0,001), com baixa na dimensão carregando objetos (R = 0.32; p = 0.04). A consistência interna apresentou um valor de 0.80. Conclusão: O questionário de percepção corporal dos hábitos posturais de jovens é um instrumento válido, com boa repetibilidade, confiabilidade e seu uso pode ser recomendado para adolescentes com o mesmo perfil deste estudo.

Reliability, Stability and Validity of the Brazilian Adaptation of the Oliveira Questionnaire on Low Back Pain in Young People.

INTRODUCTION: The objective of this study was to adapt the Brazilian version, and verify the validity, reliability and internal consistency of the Oliveira questionnaire on low back pain in young people. MATERIAL AND METHODS: The questionnaire was translated from European Portuguese into Brazilian Portuguese by means of translation and re-translation. The validity of the contents was determined by experts who analyzed the clarity and pertinence of the questions. Fifteen young people aged 15 to 18 took part in the pre-test step (qualitative analysis), 40 in the test-retest (reliability) and 679 in the evaluation of internal consistency. The intra-class correlation coefficient and Spearman's correlation coefficient were used in the reliability analysis (test-retest), and Cronbach's alpha to determine the internal consistency (stability). RESULTS: In the translation phase the questionnaire was modified and considered suitable, observing similarity and equivalence of the two versions. After being corrected by the experts in the validation of the contents, the instrument was considered suitable and valid, and in the pre-test, the young people suggested some modifications to make the questionnaire more succinct. With respect to reliability, the values for the intra-class correlation coefficient were between 0.512 - acceptable and 1 - excellent and Spearman's correlation coefficient varied between 0.525 and 1, classifying the instrument as reproducible. The internal consistency was considered acceptable with a 0.757 Cronbach's alpha. DISCUSSION: The Oliveira questionnaire was choosen since it has been used in several Portuguese studies; moreover, it addresses the need to raise data regarding low back pain and associated risk factors. CONCLUSIONS: The Brazilian version of the Oliveira questionnaire on low back pain in young people showed valid and reliable cultural adaptation, with good reliability and stability.

Introdução: O objectivo deste estudo foi adaptar a versão brasileira, verificar a validade, a fiabilidade e a consistência interna do questionário de Oliveira para dor lombar em jovens. Material e Métodos: A tradução do questionário do português de Portugal para o português do Brasil foi realizado através de tradução e re-tradução. A validade de conteúdo foi realizada por experts que analisaram a clareza e pertinência das questões. Participaram das etapas de pré-teste 15 jovens (análise qualitativa), teste-reteste 40 jovens (fiabilidade) e avaliação da consistência interna 679 jovens, com idade de 15 a 18 anos. Na análise da fiabilidade (teste-reteste) usou-se o coeficiente de correlação intra-classe e o coeficiente de correlação de Spearman, na consistência interna (estabilidade) o alpha de Cronbach. Resultados: Na fase de tradução o questionário foi modificado e considerado adequado, observando-se similaridade e equivalência nas duas versões. Na validação de conteúdo, após as correções dos peritos, o instrumento foi considerado adequado e válido. Os jovens no pré-teste sugeriram modificações tornando o questionário mais sucinto. Quanto a fiabilidade, os valores para o coeficiente de correlação intraclasse foram de 0,512 - aceitável a 1 - excelente, o coeficiente de correlação de Spearman variou entre 0,525 a 1; estes valores classificam o instrumento como reprodutível. A consistência interna foi considerada aceitável alpha de Cronbach de 0,757. Discussão: O questionário Oliveira foi escolhido por ter sido utilizado em vários estudos em Portugal; além disso, atende a necessidade de levantar dados sobre dor lombar e fatores de risco associados. Conclusão: A versão brasileira do questionário de Oliveira para dor lombar em jovens tem adaptação cultural válida e fiável, com boa confiabilidade e estabilidade.

Body surface posture evaluation: construction, validation and protocol of the SPGAP system (Posture evaluation rotating platform system).

BACKGROUND: Several posture evaluation devices have been used to detect deviations of the vertebral column. However it has been observed that the instruments present measurement errors related to the equipment, environment or measurement protocol. This study aimed to build, validate, analyze the reliability and describe a measurement protocol for the use of the Posture Evaluation Rotating Platform System (SPGAP, Brazilian abbreviation). METHODS: The posture evaluation system comprises a Posture Evaluation Rotating Platform, video camera, calibration support and measurement software. Two pilot studies were carried out with 102 elderly individuals (average age 69 years old, SD = ±7.3) to establish a protocol for SPGAP, controlling the measurement errors related to the environment, equipment and the person under evaluation. Content validation was completed with input from judges with expertise in posture measurement. The variation coefficient method was used to validate the measurement by the instrument of an object with known dimensions. Finally, reliability was established using repeated measurements of the known object. RESULTS: Expert content judges gave the system excellent ratings for content validity (mean 9.4 out of 10; SD 1.13). The measurement of an object with known dimensions indicated excellent validity (all measurement errors <1 %) and test-retest reliability. A total of 26 images were needed to stabilize the system. Participants in the pilot studies indicated that they felt comfortable throughout the assessment. The use of only one image can offer measurements that underestimate or overestimate the reality. To verify the images of objects with known dimensions the values for the width and height were, respectively, CV 0.88 (width) and 2.33 (height), SD 0.22 (width) and 0.35 (height), minimum and maximum values 24.83-25.2 (width) and 14.56 - 15.75 (height). In the analysis of different images (similar) of an individual, greater discrepancies were observed in the values found. The cervical index, for example, presented minimum and maximum values of 15.38 and 37.5, a coefficient of variation of 0.29 and a standard deviation of 6.78. CONCLUSIONS: The SPGAP was shown to be a valid and reliable instrument for the quantitative analysis of body posture with applicability and clinical use, since it managed to reduce several measurement errors, amongst which parallax distortion.

Alteraciones emocionales y la relación con las cargas de entrenamiento en nadadores de alto rendimiento / Emotional alterations and training loads in high performance swimmers / Alterações emocionais e da carga de treinamento em nadadores de alto rendimento

Resumen El objetivo de este estudio fue evaluar la relación entre la carga de entrenamiento y el estado de ánimo durante un macrociclo. Veinte nadadores velocistas de alto rendimiento, de ambos sexos fueron evaluados a través de la Escala de Percepción Subjetiva del Esfuerzo (PSE) y el perfil Brums. La carga de entrenamiento se determina multiplicando kilómetros nadó (volumen) semanalmente por la respuesta del PSE semanal. La correlación de Pearson fue usada para verificar la relación entre la carga de entrenamiento y el estado de ánimo. Los resultados mostraron una correlación positiva entre la carga y la fatiga, y negativa con el vigor (p < 0,01). Por lo tanto, se concluyó que la carga de entrenamiento determinada por la relación entre el volumen y la PSE está relacionada com los estados emocionales, el vigor y la fatiga.

Abstract The aim of this study was to evaluate the relationship between training load and athletes mood states during a macrocycle. Twenty sprinters swimmers of high performance, of both sexes, were evaluated through the Rating of Perceived Exertion (PSE) and the Brums Profile (BR). The training load was determined multiplying the weekly kilometers swam (volume) by the score of the PSE. The Pearson correlation was used to verify the relationship between the training loads and the emotional states. Results showed a positive correlation with fatigue and negative correlation with vigor (p < 0.01). Thus, it was concluded that the training load determined by the relationship between volume and PSE is related to emotional states, vigor and fatigue.

Resumo O objetivo do presente estudo foi avaliar a relação entre a carga de treinamento e o estado de humor durante um macrociclo. Vinte nadadores velocistas de alto rendimento, de ambos os sexos, foram avaliados pela Escala de Percepção Subjetiva de Esforço (PSE) e pelo Perfil Brums. A carga de treinamento foi determinada com a multiplicação dos quilômetros nadados (volume) semanalmente pela resposta da PSE semanal. A correlação de Pearson foi usadaparaverificar a relação entre a carga de treino e o estado de humor. Os resultados mostraram correlação positiva da carga com a fadiga e negativa com o vigor (p < 0,01). Assim, foi possível concluir que a carga de treinamento determinada pela relação entre o volume e a PSE se relaciona com os estados emocionais, o vigor e a fadiga de nadadores.

Association of obesity with chronic disease and musculoskeletal factors.

INTRODUCTION: overweight and obesity in adolescents are major public health problems with particular interest, because of their potential association with risk factors for development of diseases. The study aimed to determine the prevalence of overweight and obesity in adolescents in southern Portugal and investigate the association with risk factors for development of cardiovascular, respiratory and musculoskeletal diseases. METHODS: the sample consisted of 966 adolescents aged 10 to 16 years. The calculation of body mass index (BMI), evaluation of blood glucose, total cholesterol and triglycerides, blood pressure, spirometry and application of low back pain (LBP) questionnaire were performed. RESULTS: 178 (18.4%) adolescents were overweight and 52 (5.4%) obese. None of the variables revealed a statistically significant association with overweight and obesity. The presence of high blood pressure was observed in 200 (20.7%) individuals and hypertension in 158 (16.4%) adolescents. Overweight and obese adolescents are 2.3 times more likely to develop signs of pre-hypertension and hypertension. 559 (57.9%) students had restrictive respiratory disorders and 23 (2.4%) had obstructive disorders. Those who were overweight and obese had 0.64 probability of having restrictive respiratory disorders. CONCLUSION: there was a high prevalence of overweight and obesity in Portuguese adolescents and these showed a statistically significant relationship with the development of pre-hypertension and hypertension, and restrictive respiratory disorders.

Association of obesity with chronic disease and musculoskeletal factors / Associação da obesidade com fatores de risco para doenças crônicas e musculoesqueléticas

SummaryIntroduction:overweight and obesity in adolescents are major public health problems with particular interest, because of their potential association with risk factors for development of diseases. The study aimed to determine the prevalence of overweight and obesity in adolescents in southern Portugal and investigate the association with risk factors for development of cardiovascular, respiratory and musculoskeletal diseases.Methods:the sample consisted of 966 adolescents aged 10 to 16 years. The calculation of body mass index (BMI), evaluation of blood glucose, total cholesterol and triglycerides, blood pressure, spirometry and application of low back pain (LBP) questionnaire were performed.Results:178 (18.4%) adolescents were overweight and 52 (5.4%) obese. None of the variables revealed a statistically significant association with overweight and obesity. The presence of high blood pressure was observed in 200 (20.7%) individuals and hypertension in 158 (16.4%) adolescents. Overweight and obese adolescents are 2.3 times more likely to develop signs of pre-hypertension and hypertension. 559 (57.9%) students had restrictive respiratory disorders and 23 (2.4%) had obstructive disorders. Those who were overweight and obese had 0.64 probability of having restrictive respiratory disorders.Conclusion:there was a high prevalence of overweight and obesity in Portuguese adolescents and these showed a statistically significant relationship with the development of pre-hypertension and hypertension, and restrictive respiratory disorders.

ResumoIntrodução:o sobrepeso e a obesidade em adolescentes são atualmente considerados problemas de saúde pública, com interesse decorrente de sua associação a fatores de risco para o desenvolvimento de doenças.Objetivo:determinar a prevalência de sobrepeso e obesidade em adolescentes do sul de Portugal e investigar os fatores associados ao desenvolvimento de doenças cardiovasculares, respiratórias e musculoesqueléticas.Métodos:a amostra foi constituída por 966 adolescentes com idade entre 10 e 16 anos. Foi calculado o índice de massa corporal (IMC) e foram realizadas avaliações de glicemia, colesterol total, triglicerídeos, pressão arterial, espirometria, além da aplicação de um questionário para avaliar a presença de lombalgia.Resultados:cento e setenta e oito (18,4%) adolescentes apresentaram sobrepeso e 52 (5,4%) eram obesos. Nenhuma das variáveis analisadas revelou associação estatisticamente significativa com sobrepeso e obesidade. Duzentos (20,7%) adolescentes apresentaram pressão arterial elevada e 158 (16,4%), hipertensão. Os adolescentes com sobrepeso e obesidade revelaram 2,3 vezes mais chances de desenvolver pré-hipertensão e hipertensão. Quinhentos e cinquenta e nove (57,9%) alunos apresentaram doenças respiratórias restritivas e 23 (2,4%), distúrbios obstrutivos, sendo que os indivíduos com sobrepeso e obesidade apresentaram 0,64 de probabilidade de desenvolver doenças respiratórias restritivas.Conclusão:observou-se uma elevada prevalência de adolescentes portugueses com sobrepeso e obesidade. Essas variáveis demonstraram uma relação estatisticamente significativa com o desenvolvimento de pré-hipertensão e hipertensão arterial e com doenças respiratórias restritivas.

The Pavonia xanthogloea (Ekman, Malvaceae): Phenolic compounds quantification, anti-oxidant and cytotoxic effect on human lymphocytes cells.

INTRODUCTION: Pavonia xanthogloea is traditionally used as an antimicrobial and anti-tumour medicine in Southern Brazilian region. However, investigations about this species are still incipient. HYPOTHESIS TESTED: The study postulated that P. xanthologea specie present some phenolic compound and present some biological properties as anti-oxidant and cytoprotective effect against oxidative stress. MATERIALS AND METHODS: The content of eight phenolic molecules in the crude ethanolic extract of the aerial part of P. xanthogloea and its five fractions (hexane, dichloromethane, ethyl-acetate, n-butanol, and water) was determined by heterotrophic plate count method. The anti-oxidant capacity of the extract and the fractions was determined by 1,1-diphenyl-2-picryl-hydrazyl assay. The potential anti-oxidant and cytoprotective effect was also analyzed in human lymphocyte culture treated with extract/fractions at different concentrations with and without oxidative stress generated by hydrogen peroxide (H2O2) and sodium nitroprusside (SNP) exposition. RESULTS: Tiliroside was the molecule detected in all extract. Water and ethyl-acetate fractions showed the highest radical-scavenging activity. The crude extract, hexane, water, and n-butanol reversed the higher reactive oxygen specie levels generated by H2O2 and SNP to levels similar to those observed in the control group. In addition, crude extract, hexane, ethyl-acetate and n-butanol did not caused cytotoxicity, whereas water fraction was cytotoxic at higher concentration tested here (300 µg/mL). The cytotoxicity reversion caused by SNP exposition was concentration-dependent of the extract and fractions. However, dichloromethane fraction increased cell mortality in all concentrations investigated and was not able to decrease cell death in the lymphocytes exposed to SNP. CONCLUSION: The results suggest potential medicine use of this species.