Exposure to Smartphones and Tablets, Physical Activity and Sleep in Children From 5 to 10 Years Old: A Systematic Review and Meta-Analysis.

OBJECTIVE: To conduct a systematic review and meta-analysis to verify the association between smartphone/tablet exposure and physical activity and sleep in children from 5 to 10 years old. Data Source: This study followed the guidelines of PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) and included studies that met eligibility criteria based on the "PECO" strategy: participants (children from 5 to 10 years old), exposure (smartphone and tablet use), and outcome (physical activity and sleep). STUDY INCLUSION AND EXCLUSION CRITERIA: The inclusion criteria were observational studies published in indexed scientific journals and written in Portuguese, English, and Spanish that verified the association of exposure to smartphones/tablets with physical activity and sleep in children aged 5 to 10 years of both sexes. Studies were considered eligible only if they met the previous criteria. Data Extraction: The search was conducted in January 2023 on databases from electronic journals without the restriction of the period. To meta-analyze were extracted and grouped using models of fixed and random effects, the coefficients Odds Ratio (OR), Beta (ß), Standard Error (SE), and Confidence Intervals of 95% (95%CI). Data Synthesis: 2396 potentially relevant papers were identified, and 17 met the inclusion criteria. RESULTS: It can be verified that there was an inverse association between smartphones with physical activity and sleep. Studies indicate that for every additional hour of smartphone and tablet use, sleep can be expected to decrease by an average of 11 minutes (ß = - 0.11; 95%CI = -0.13; -0.09). Children using smartphones and tablets were 1.79 times (OR = 1.79; 95%CI = 1.72-1.86) more likely to have shorter sleep duration and 1.53 times (OR = 1.53; 95%CI = 1.41-1.65) more likely to have worse sleep quality. Children with shorter smartphone and tablet usage were 1.19 times more likely to be active (OR = 1.19; 95% CI = 1.03-1.37). CONCLUSION: Children of 5 to 10 years who are more often exposed to smartphones and tablets are prone to have worse quality and quantity of sleep, as well as less practice of physical activity. Health promotion actions can be encouraged based on the results, aiming to reduce the use time of these devices and improve children's health and quality of life.

Physical activity as a mediator of the association of body mass index change with anxiety/depression symptoms in Brazilian adults during COVID-19 / La actividad física como mediadora de la asociación de la alteración del índice de masa corporal con síntomas de ansiedad/depresión en adultos brasileños durante la COVID-19

Background: the COVID-19 pandemic has impacted people’s behaviors and mental health around the world. Aim: to verify the mediating role of physical activity (PA) level in the relationship between body mass index (BMI) and anxiety and depression symptoms in adults during the COVID-19 pandemic. Methods: this is a cross-sectional study with Brazilian adults aged ≥ 18 years (N = 2000, 59.6 % women) selected by the nonprobabilistic snowball method through digital means of communication (WhatsApp®, Telegram®, Facebook®, Twitter®, e-mails). Linear regression models were fitted for PA level mediation analyses in the relationship between BMI and anxiety/depression symptoms. Results: significant differences were found between the active/not overweight group and the other three groups (active/overweight, insufficiently active/not overweight and insufficiently active/overweight [p < 0.001]) for anxiety/depression after adjusting for age, sex, chronic diseases, alcohol consumption, and smoking. When testing the mediating role of daily PA in the association between BMI and anxiety/depression symptoms, BMI was negatively associated with daily PA in the first regression equation (p < 0.001); in the second, BMI was positively related to anxiety/depression symptoms (p < 0.001); and in the third, daily PA showed an inverse relationship with anxiety/depression symptoms (p < 0.001), and although BMI remained negatively associated with anxiety/depression symptoms, these associations maintained their statistical significance. Conclusions: the results suggest that the effect of BMI on anxiety and depression was partially mediated by daily PA.(AU)

Introducción: la pandemia de covid-19 ha afectado el comportamiento y la salud mental de las personas en todo el mundo. Objetivo: verificar la mediación del nivel de actividad física (af) en la relación entre el índice de masa corporal (imc) y los síntomas de ansiedad y depresión en adultos durante la pandemia covid-19. Métodos: estudio transversal, con adultos brasileños con edad ≥ 18 años (n = 2.000, 59,6 % mujeres), seleccionados por el método no probabilístico de bola de nieve, a través de medios de comunicación digitales (whatsapp®, telegram®, facebook®, twitter®, correos electrónicos).se ajustaron modelos de regresión lineal para los análisis de la mediación del nivel de actividad física en la relación entre el imc y los síntomas de ansiedad/depresión. Resultados: se encontraron diferencias significativas entre el grupo activo/sin exceso de peso y los otros tres grupos (activo/con exceso de peso, insuficientemente activo/sin exceso de peso e insuficientemente activo/con exceso de peso [p < 0,001]) para ansiedad/depresión después de ajustar por edad, sexo, enfermedades, consumo de alcohol y tabaquismo. al probar el papel mediador de la af diaria en la asociación entre el imc y los síntomas de ansiedad/depresión, en la primera ecuación de regresión, el imc se asoció negativamente con la af diaria (p < 0,001); en la segunda, el imc se relacionó positivamente con los síntomas de ansiedad/depresión (p < 0,001); y en la tercera, la af diaria mostró una relación inversa con los síntomas de ansiedad/depresión (p < 0,001), y aunque el imc mantuvo una asociación negativa con dichos síntomas, estas asociaciones conservaron su significación estadística. Conclusiones: los resultados sugieren que el efecto del imc sobre la ansiedad y la depresión estuvo parcialmente mediado por la actividad física diaria.

Reservoir Effect of Textile Substrates on the Delivery of Essential Oils Microencapsulated by Complex Coacervation.

Microcapsules are being used in textile substrates increasingly more frequently, availing a wide spectrum of possibilities that are relevant to future research trends. Biofunctional Textiles is a new field that should be carefully studied, especially when dealing with microencapsulated essential oils. In the final step, when the active principle is delivered, there are some possibilities to quantify and simulate its doses on the skin or in the environment. At that stage, there is a phenomenon that can help to better control the delivery and the reservoir effect of the textile substrate. Depending on the chemical characteristics of the molecule to be delivered, as well as the structure and chemical nature of the fabric where it has been applied, there is physicochemical retention exerted by fibers that strongly controls the final rate of principle active delivery to the external part of the textile substrate. The study of this type of effect in two different substrates (cotton and polyester) will be described here regarding two different essential oils microencapsulated and applied to the substrates using padding technology. The experimental results of the final drug delivery demonstrate this reservoir effect in both essential oils.

Smart labels based on polyvinyl alcohol incorporated with chitosan nanoparticles loaded with grape extract: Functionality, stability and food application.

Anthocyanins (ACNs) are natural compounds with potential applications due to their colorimetric response to pH. Due to their sensitivity to various environmental factors, nanoencapsulation with biopolymers is a successful strategy for stabilizing ACNs. In this work ACNs were extracted from grape skins and encapsulated into chitosan (CS) nanoparticles by ionic gelation using sodium tripolyphosphate (TPP) as a cross-linking agent. CS nanoparticles loaded with ACNs had particle sizes between 291 and 324 nm and polydispersity index around 0.3. The encapsulation efficiency of ACNs was approximately 60 %; and encapsulated anthocyanins (ACN-NPs) exhibited color change properties under different pH conditions. pH-sensitive labels based on polyvinyl alcohol (PVA) were prepared by the casting method. The effect of incorporating ACN-NPs on the physical, structural, and pH-sensitive properties of PVA labels was evaluated, and its application as shrimp freshness indicator was studied. The nanoencapsulation protected ACNs against heat and light treatments, preserving the original purple color. When applying the label, visible changes from red to blue until reaching yellow were observed with the change in the quality of the shrimp at the refrigeration temperature. The results suggest that PVA labels containing ACNs encapsulated in C-NPs can be used as smart packaging labels in the food industry.

Sexual behavior according to undergraduate students: perspective of cross-cultural nursing and intersectional framing.

OBJECTIVE: to discuss undergraduate students' sexual behavior from the perspective of social markers and cross-cultural care proposed by Madeleine Leininger. METHODS: descriptive-exploratory qualitative research, with a theoretical-philosophical foundation in the Transcultural Theory. Convenience sample was composed of 57 young people from two universities in Rio de Janeiro. The focus groups' content were analyzed lexically using the IRAMUTEQ software. RESULTS: four classes emerged: Young people's sexual scripts: between the fear of an unplanned pregnancy and the risk of exposure to sexually transmitted infections; Affective relationships: trust in steady sexual partners, apparent sense of security and disuse of condoms; Sexual practices, gender and cultural determinants: distinction in men's and women's role; Sexual partnerships, negotiation of condom use and vulnerability to sexually transmitted infections. FINAL CONSIDERATIONS: challenges are perceived for the attention to undergraduate students' sexual health, who verbalized risky sexual behaviors due to sociocultural vulnerabilities.

Prevenção combinada do HIV: estamos diante de um novo paradigma? / Combined HIV prevention: are we facing a new paradigm? / Prevención combinada del VIH: ¿estamos ante un nuevo paradigma?

Objetivo: refletir sobre a estratégia da prevenção combinada do HIV como um novo paradigma de prevenção. Conteúdo: trata-se de uma análise reflexiva do documento norteador da resposta brasileira a epidemia do HIV: "Prevenção combinado do HIV: bases conceituais para profissionais, trabalhadores(as) e gestores(as) de saúde", proposta pelo Ministério da Saúde do Brasil, à luz do referencial de Thomas Kuhn em sua obra, "A estrutura das revoluções científicas". O "novo" paradigma, a prevenção combinada, não evidencia mudanças estruturais nas estratégias de prevenção, apenas realiza incorporações de novas tecnologias em sua política. Considerações finais: a prevenção combinada do HIV não se apresenta como um novo paradigma de prevenção na resposta brasileira à epidemia, mas como uma reorganização das estratégias de prevenção dos paradigmas já vigentes(AU)

Objective: to reflect on the combined HIV prevention strategy as a new prevention paradigm. Content: this is a reflective analysis of the guiding document of the Brazilian response to the HIV epidemic: "Combined HIV prevention: conceptual bases for professionals, workers and health managers", proposed by the Ministry of Health of Brazil, in the light of Thomas Kuhn's reference in his work, "The structure of scientific revolutions". The "new" paradigm, combined prevention, does not show structural changes in prevention strategies, it only incorporates new technologies into its policy. Final considerations: combined HIV prevention is not presented as a new prevention paradigm in the Brazilian response to the epidemic, but as a reorganization of prevention strategies from existing paradigms(AU)

Objetivo: reflexionar sobre la estrategia combinada de prevención del VIH como nuevo paradigma de prevención. Contenido: se trata de un análisis reflexivo del documento orientador de la respuesta brasileña a la epidemia del VIH: "Prevención combinada del VIH: bases conceptuales para profesionales, trabajadores y gestores de salud", propuesto por el Ministerio de Salud de Brasil, a la luz de Referencia de Thomas Kuhn en su obra, "La estructura de las revoluciones científicas". El "nuevo" paradigma, de la prevención combinada, no muestra cambios estructurales en las estrategias de prevención, solo incorpora nuevas tecnologías a su política. Consideraciones finales: la prevención combinada del VIH no se presenta como un nuevo paradigma de prevención en la respuesta brasileña a la epidemia, sino como una reorganización de las estrategias de prevención a partir de los paradigmas existentes(AU)

Physical activity as a mediator of the association of body mass index change with anxiety/depression symptoms in Brazilian adults during COVID-19.

BACKGROUND: the COVID-19 pandemic has impacted people's behaviors and mental health around the world. AIM: to verify the mediating role of physical activity (PA) level in the relationship between body mass index (BMI) and anxiety and depression symptoms. METHODS: this is a cross-sectional study with Brazilian adults aged ≥ 18 years (n = 2,000, 59.6 % women) selected by the nonprobabilistic snowball method through digital means of communication (WhatsApp®, Telegram®, Facebook®, Twitter®, e-mails). Linear regression models were fitted for PA level mediation analyses in the relationship between BMI and anxiety/depression symptoms. RESULTS: significant differences were found between the active/not overweight group and the other three groups (active/overweight, insufficiently active/not overweight and insufficiently active/overweight [p < 0.001]) for anxiety/depression after adjusting for age, gender, chronic diseases, alcohol consumption, and smoking. When testing the mediating role of daily PA in the association between BMI and anxiety/depression symptoms, BMI was negatively associated with daily PA in the first regression equation (p < 0.001); in the second, BMI was positively related to anxiety/depression symptoms (p < 0.001); and in the third, daily PA showed an inverse relationship with anxiety/depression symptoms (p < 0.001), and although BMI remained negatively associated with anxiety/depression symptoms, these associations maintained their statistical significance. CONCLUSIONS: the results suggest that the effect of BMI on anxiety and depression was partially mediated by daily PA.

Euterpe oleracea Mart. (Açai) seed extract improves physical performance in old rats by restoring vascular function and oxidative status and activating mitochondrial muscle biogenesis.

OBJECTIVES: Alterations in cardiovascular and skeletal muscle function are hallmarks of ageing that lead to exercise intolerance. We aimed to examine whether the treatment with Euterpe oleracea Mart. seed extract (ASE) associated with exercise training improves aerobic exercise performance by promoting healthy ageing in the elderly. METHODS: Male Wistar rats were divided into five groups: Young (3 months), Old (18 months), Old+ASE (ASE 200 mg/kg/day), Old+Training (exercise training 30 min/day; 5 days/week) and Old+Training+ASE, for 4 weeks. KEY FINDINGS: ASE treatment increased the exercise time and the running distance concerning the initial maximal treadmill stress test (MTST) in the Old+Training+ASE group. Exercise training or ASE treatment restored the aorta oxidative damage and antioxidant defence. It reduced the acetylcholine (ACh)-induced vasodilation in the aorta of old animals to the same values as the young and improved hypertension. Only the association of both strategies restored the ACh-induced vasodilation in mesentery arteries. Remarkably, exercise training associated with ASE increased the antioxidant defence, nitrite levels and expression of the mitochondrial SIRT-1, PGC1α in soleus muscle homogenates. CONCLUSIONS: ASE treatment associated with exercise training contributes to better exercise performance and tolerance in ageing by improving vascular function, oxidative stress and activating the muscle SIRT-1/PGC-1α pathway.

Is Greater Social Support from Parents and Friends Related to Higher Physical Activity Levels among Adolescents?

Increasing physical activity levels during adolescence have been put on the agenda by several researchers. This study verified the association between social support from parents and friends and different amounts of moderate-to-vigorous physical activity (MVPA) among adolescents in public school. The present study had a cross-sectional design and included a representative sample of 1984 adolescents (aged 15-17). The ASAFA (Apoio Social para prática de Atividade Física para Adolescentes) scale and the QAFA (Questionário de Atividade Física para Adolescentes) were used to determine social support and physical activity, respectively. For statistical analysis, a conceptual model for structured equations and weighted least squares mean and variance adjusted were applied. Social support from parents increased the odds of engaging in 180 min/week of MVPA by 46.7%, 47.8% for 300 min/week, and 45.5% for 420 min/week. Social support from friends showed similar relations trends: 23.8% for 180 min/week, 23.6% for 300 min/week, and 21.2% for 420 min/week. Social support from parents and friends increased the probability of adolescents reaching the amounts of physical activity investigated. The results indicate that greater social support (from parents and friends) was associated with a higher level of MVPA in Brazilian adolescents.

Feminicídio seguido de suicídio: a organização da mídia na prestação de serviço para evitar casos das violências correlacionadas / Femicide followed by suicide: the organization of the media in providing service in order to prevent cases of the correlated violence / Feminicidio seguido de suicidio: la organización de los medios de comunicación en la prestación de servicios para evitar casos de las violencias correlacionadas

O presente artigo tem como objetivo estudar as reportagens jornalísticas que noticiam casos de feminicídio seguido de suicídio, e analisar qual o papel da mídia na conscientização do público sobre as violências correlacionadas. Com muitos estigmas, o tema ainda é pouco abordado pelo jornalismo de forma esclarecedora e em formato de prestação de serviço, uma vez que ambos os assuntos ainda são tabus para a sociedade. Dessa forma, este estudo se propõe a ampliar o debate, a partir dos autores Durkheim, Blázquez e Christofoletti. A pesquisa também é pautada com dois manuais para jornalistas, o da Organização Mundial da Saúde (OMS), sobre como falar do suicídio; e o da plataforma Universa UOL, sobre como abordar o feminicídio. Ao longo do trabalho, percebe-se que o jornalismo precisa refletir sobre seu papel na prevenção de casos como esses e a respeito de como exercê-lo

This article aims to study the journalistic reports that report cases of femicide followed by suicide, and to analyze the role of the media in raising the public awareness of correlated violence. With many stigmas, the subject is still little addressed by journalism in an enlightening way and in order to provide service, since both subjects are still taboo subjects for society. Thus, this study proposes to broaden the debate, based on the authors Durkheim, Blázquez and Christofoletti. The research is also guided by two manuals for journalists: that elaborated by the World Health Organization (WHO), on how to talk about suicide; and that presented by the Universa UOL platform, on how to approach femicide. Throughout the work, it is clear that journalism needs to reflect on its role in preventing cases like these and how to exercise it

Este artículo tiene como objetivo estudiar los reportajes periodísticos que divulgan casos de feminicidio seguido de suicidio, y analizar el papel de los medios de comunicación en la sensibilización de la población sobre la violencia correlacionada. Con muchos estigmas, el tema es aún poco abordado por el periodismo de manera esclarecedora y con el fin de prestar un servicio, ya que los dos temas siguen siendo tabúes para la sociedad. Así, este estudio propone ampliar el debate, apoyándose en los autores Durkheim, Blázquez y Christofoletti. La investigación también se guía por dos manuales para periodistas: el elaborado por la Organización Mundial de la Salud (OMS), sobre cómo hablar sobre el suicidio; y el presentado en la plataforma Universa UOL, sobre cómo abordar el feminicidio. A lo largo del trabajo, queda claro que el periodismo necesita reflexionar sobre su papel en la prevención de casos como estos y sobre cómo ejercerlo

Application of Lavender-Oil Microcapsules to Functionalized PET Fibers.

Surface treatments for textile substrates have received significant attention from researchers around the world. Ozone and plasma treatments trigger a series of surface alterations in textile substrates that can improve the anchoring of other molecules or particles on these substrates. This work aims to evaluate the effect of ozone and plasma treatments on the impregnation of polymeric microcapsules containing lavender oil in polyester fabrics (PES). Microcapsules with walls of chitosan and gum arabic were prepared by complex coacervation and impregnated in PES, plasma-treated PES, and ozone-treated PES by padding. The microcapsules were characterized for their size and morphology and the surface-treated PES was evaluated by FTIR, TGA, SEM, and lavender release. The microcapsules were spherical in shape, with smooth surfaces. The FTIR analyses of the textile substrates with microcapsules showed bands referring to the polymers of the microcapsules, but not to the lavender; this was most likely because the smooth surface of the outer wall did not retain the lavender. The mass loss and the degradation temperatures measured by TGA were similar for all the ozone-treated and plasma-treated polyester samples. In the SEM images, spherical microcapsules and the impregnation of the microcapsules of larger sizes were perceived. Through the lavender release, it was observed that the plasma and ozone treatments interfered both with the amount of lavender delivered and with the control of the delivery.

Sexual behavior according to undergraduate students: perspective of cross-cultural nursing and intersectional framing / Comportamiento sexual según estudiantes universitarios: perspectiva de enfermería transcultural y encuadre interseccional / Comportamento sexual segundo jovens universitários: perspectiva da enfermagem transcultural e do enquadramento interseccional

ABSTRACT Objective: to discuss undergraduate students' sexual behavior from the perspective of social markers and cross-cultural care proposed by Madeleine Leininger. Methods: descriptive-exploratory qualitative research, with a theoretical-philosophical foundation in the Transcultural Theory. Convenience sample was composed of 57 young people from two universities in Rio de Janeiro. The focus groups' content were analyzed lexically using the IRAMUTEQ software. Results: four classes emerged: Young people's sexual scripts: between the fear of an unplanned pregnancy and the risk of exposure to sexually transmitted infections; Affective relationships: trust in steady sexual partners, apparent sense of security and disuse of condoms; Sexual practices, gender and cultural determinants: distinction in men's and women's role; Sexual partnerships, negotiation of condom use and vulnerability to sexually transmitted infections. Final considerations: challenges are perceived for the attention to undergraduate students' sexual health, who verbalized risky sexual behaviors due to sociocultural vulnerabilities.

RESUMEN Objetivo: discutir el comportamiento sexual de estudiantes universitarios en la perspectiva de los marcadores sociales y el cuidado transcultural propuesto por Madeleine Leininger. Métodos: investigación cualitativa descriptiva-exploratoria, con fundamento teórico-filosófico en la Teoría Transcultural. La muestra de conveniencia fue compuesta por 57 jóvenes de dos universidades de Río de Janeiro. Los contenidos de los grupos focales se analizaron léxicamente mediante el software IRAMUTEQ. Resultados: surgieron cuatro clases: Guiones sexuales de jóvenes: entre el miedo a un embarazo no planeado y el riesgo de exposición A INFECCIONES DE TRANSMISIÓN SEXUAL; Relaciones afectivas: confianza en parejas sexuales estables, aparente sensación de seguridad y desuso de preservativos; Prácticas sexuales, género y determinantes culturales: distinción en los roles de hombres y mujeres y; Parejas sexuales, negociación del uso del condón y vulnerabilidad a las infecciones de transmisión sexual. Consideraciones finales: se perciben desafíos para la atención a la salud sexual de estudiantes universitarios, quienes verbalizaron conductas sexuales de riesgo, debido a vulnerabilidades socioculturales.

RESUMO Objetivo: discutir os comportamentos sexuais de jovens universitários na perspectiva dos marcadores sociais e do cuidado transcultural proposto por Madeleine Leininger. Métodos: pesquisa qualitativa descritiva-exploratória, com alicerce teórico-filosófico na Teoria Transcultural. Amostragem por conveniência foi composta por 57 jovens de duas universidades cariocas. Os conteúdos dos grupos focais foram analisados lexicalmente pelo software IRAMUTEQ. Resultados: emergiram quatro classes: Roteiros sexuais de jovens: entre o receio de uma gestação não planejada e o risco da exposição às infecções sexualmente transmissíveis; Relacionamentos afetivos: a confiança em parcerias sexuais fixas, aparente sensação de segurança e o desuso dos preservativos; Práticas sexuais, gênero e determinantes culturais: distinção nos papéis de homens e mulheres; Parcerias sexuais, negociação do uso do preservativo e a vulnerabilidade às infecções sexualmente transmissíveis. Considerações finais: percebem-se desafios para atenção à saúde sexual dos jovens universitários, que verbalizaram comportamentos sexuais de risco em função de vulnerabilidades socioculturais.

Time Analysis of an Emergent Infection Spread Among Healthcare Workers: Lessons Learned from Early Wave of SARS-CoV-2.

Aim: To find whether an emergent airborne infection is more likely to spread among healthcare workers (HCW) based on data of SARS-CoV-2 and whether the number of new cases of such airborne viral disease can be predicted using a method traditionally used in weather forecasting called Autoregressive Fractionally Integrated Moving Average (ARFIMA). Methods: We analyzed SARS-CoV-2 spread among HCWs based on outpatient nasopharyngeal swabs for real-time polymerase chain reaction (RT-PCR) tests and compared it to non-HCW in the first and the second wave of the pandemic. We also generated an ARFIMA model based on weekly case numbers from February 2020 to April 2021 and tested it on data from May to July 2021. Results: Our analysis of 8998 tests in the 15 months period showed a rapid rise in positive RT-PCR tests among HCWs during the first wave of pandemic. In the second wave, however, positive patients were more commonly non-HCWs. The ARFIMA model showed a long-memory pattern for SARS-CoV-2 (seven months) and predicted future new cases with an average error of ±1.9 cases per week. Conclusion: Our data indicate that the virus rapidly spread among HCWs during the first wave of the pandemic. Review of published literature showed that this was the case in multiple other areas as well. We therefore suggest strict policies early in the emergence of a new infection to protect HCWs and prevent spreading to the general public. The ARFIMA model can be a valuable forecasting tool to predict the number of new cases in advance and assist in efficient planning.

Fatores que influenciam o uso inadequado do preservativo na perspetiva de jovens universitários / Factors influencing condom misuse from the perspective of young university students / Factores que influyen en el uso inadecuado del preservativo desde la perspectiva de los jóvenes universitarios

Resumo Enquadramento: O comportamento de risco sexual de jovens relacionado com as infeções sexualmente transmissíveis envolve o início da vida sexual, variabilidade de parceiros, práticas casuais, (des)uso de preservativos e consumo de substâncias psicoativas. Objetivo: Identificar os fatores que influenciam o uso inadequado do preservativo na perspetiva de jovens universitários. Metodologia: Estudo descritivo, qualitativo, realizado numa universidade privada carioca brasileira com 30 jovens universitários, que integraram três grupos focais. Análise de dados utilizando a técnica de análise lexical e do IRaMuTeQ. Resultados: Emergiram cinco classes, entre elas: o uso de álcool como determinante do comportamento de risco; uso inadequado de preservativos, associado ao risco de infeção; pouca informação sobre a prevenção dessas doenças; e uso de preservativos. Nas práticas sexuais, os participantes faziam uso descontinuado do preservativo e preocupavam-se mais com a ocorrência de uma gravidez não planeada. Conclusão: A assunção dos comportamentos sexuais de risco pelos universitários denota vulnerabilidades nos âmbitos individual-social evidenciando-se a necessidade de se desenvolver estratégias efetivas de educação para a saúde e de intervenções terapêuticas.

Abstract Background: The sexual risk-taking behaviors of young people regarding Sexually Transmitted Infections (STIs) are associated with sexual debut, partner variability, casual sex activities, (lack of) use of condoms, and substance abuse. Objective: To identify the factors influencing condom misuse from the perspective of young university students. Methodology: A descriptive qualitative study was conducted at a private university in Rio de Janeiro, Brazil, with 30 young university students participating in three focus groups. Data were analyzed using the lexical analysis technique and IRaMuTeQ software. Results: The following five classes emerged: alcohol use as a determinant of risky behaviors; condom misuse associated with the risk of infection; lack of information on STI prevention; and condom use. Participants reported using condoms inconsistently and being more concerned about the occurrence of an unplanned pregnancy. Conclusion: University students' sexual risk-taking behaviors reveal individual and social vulnerabilities and highlight the need to develop efficient health education and therapeutic interventions strategies.

Resumen Marco contextual: El comportamiento sexual de riesgo de los jóvenes relacionado con las infecciones de transmisión sexual implica el inicio de la vida sexual, la variabilidad de las parejas, las prácticas casuales, el (no) uso de preservativos y el consumo de sustancias psicoactivas. Objetivo: Identificar los factores que influyen en el uso inadecuado del preservativo desde la perspectiva de los jóvenes universitarios. Metodología: Estudio descriptivo y cualitativo, realizado en una universidad privada de Río de Janeiro, Brasil, con 30 jóvenes universitarios que participaron en tres grupos focales. El análisis de datos se llevó a cabo mediante la técnica del análisis léxico y del IRAMUTEC. Resultados: Surgieron cinco clases, entre ellas, el consumo de alcohol como determinante del comportamiento de riesgo; el uso inadecuado del preservativo, asociado al riesgo de infección; la poca información sobre la prevención de estas enfermedades, y el uso del preservativo. En las prácticas sexuales, los participantes hacían un uso discontinuo del preservativo y se mostraban más preocupados por la aparición de un embarazo no planificado. Conclusión: La adopción de conductas sexuales de riesgo por parte de los estudiantes universitarios denota vulnerabilidades en el ámbito individual y social, lo que pone de manifiesto la necesidad de desarrollar estrategias eficaces de educación sanitaria e intervenciones terapéuticas.

Different conformations and packing motifs in the crystal structures of four thio-phene-carbohydrazide-pyridine derivatives.

The crystal structures of four thio-phene-carbohydrazide-pyridine derivatives, viz. N'-[(E)-pyridin-3-yl-methyl-idene]thio-phene-2-carbohydrazide, C11H9N3OS, (I), N'-[(E)-pyridin-2-yl-methyl-idene]thio-phene-2-carbohydrazide, C11H9N3OS, (II), N-methyl-N'-[(E)-pyridin-2-yl-methyl-idene]thio-phene-2-carbohydrazide, C12H11N3OS, (III) and N'-[(E)-pyridin-2-yl-methyl-idene]-2-(thio-phen-2-yl)ethano-hydrazide, C12H11N3OS, (IV) are described. The dihedral angles between the thio-phene ring and the pyridine ring are 21.4 (2), 15.42 (14), 4.97 (8) and 83.52 (13)° for (I)-(IV), respectively. The thio-phene ring in (IV) is disordered over two orientations in a 0.851 (2):0.149 (2) ratio. Key features of the packing include N-H⋯Np (p = pyridine) hydrogen bonds in (I), which generate C(7) chains propagating in the [001] direction; N-H⋯Np links also feature in (II), but in this case they lead to C(6) [001] chains; in (IV), classical amide (C4) N-H⋯O links result in [010] chains; in every case adjacent mol-ecules in the chains are related by 21 screw axes. There are no classical hydrogen bonds in the extended structure of (III). Various weak C-H⋯X (X = O, N, S) inter-actions occur in each structure, but no aromatic π-π stacking is evident. The Hirshfeld surfaces and fingerprint plots for (I)-(IV) are compared.

Ocular findings of congenital Zika virus infection with microcephaly.

PURPOSE: To describe ocular findings in infants with signs of congenital Zika virus syndrome (CZS) in Paraíba, Brazil, as well as to conduct a literature review and report correlations with published clinical cases. METHODS: In the Paraíba sample, infants with microcephaly suggestive of CZS were classified as Z (confirmed), PZ (probable), or SZ (suspected) according to serological testing and/or clinical findings of CZS. The patients underwent a clinical eye examination, and the results were correlated with published clinical cases. RESULTS: Ocular findings were present in 24 (42.9%) of 56 patients, consisting of gross retinal pigmentation in 11 (45.8%), macular chorioretinal atrophy in 11 (45.8%), optic nerve hypoplasia in 1 (4.2%), optic nerve pallor in 14 (58.3%), and increased cup-to-disk ratio in 2 (8.3%). The study revealed retina and optic nerve findings consistent with previous reports of ophthalmic involvement in CZS. However, external ocular changes observed in other studies were not detected. CONCLUSION: Ocular findings similar and consistent with the literature on CZS were observed with considerable frequency and severity, regardless of the patients' serological confirmation or classification. Infants with signs of CZS should undergo ocular examination.

Os efeitos do stretching global ativo em bailarinas clássicas / The effects of global active stretching on classical ballet dancers

INTRODUÇÃO: O Stretching Global Ativo (SGA) pode ser uma boa estratégia para a melhora da postura e qualidade de vida e para a redução da dor. Ele atua com alongamentos de cadeias musculares podendo proporcionar melhora da prática do balé sem grandes estresses físicos. OBJETIVO: Verificar os efeitos do SGA na postura, dor e qualidade de vida de bailarinas clássicas. MATERIAIS E MÉTODOS: Foi um ensaio clínico randomizado no período de novembro de 2020 a outubro de 2021. Constituiu-se de 20 bailarinas (idade entre 12 e 22 anos), sem lesões ortopédicas ou em recuperação, e sem tratamento fisioterapêutico. Estas foram divididas em dois grupos. O grupo controle em que não houve nenhuma intervenção e o grupo SGA, o qual realizou três posturas durante 15 minutos para cada, duas vezes por semana, totalizando 10 sessões. Avaliouse por meio do Questionário de Qualidade de Vida do Atleta, Questionário Nórdico Musculoesquelético e pelo Software para Avaliação Postural, empregando os testes t (independência), teste t (pareado), teste G (contingência) e o Qui-quadrado. RESULTADOS: Não houve diferença estatística na qualidade de vida e dor, porém no grupo controle houve aumento da extensão do corpo (0,003) e dorsiflexão do tornozelo (0,01); e no grupo SGA, houve aumento do valgo de joelho esquerdo (0,05), redução da rotação interna da cabeça do fêmur (0,01) e extensão do joelho esquerdo. CONCLUSÃO: Houve efeitos do SGA apenas na postura das bailarinas, fato não encontrado na dor e qualidade de vida das mesmas. Registro Brasileiro de Ensaios Clínicos (ReBEC) de protocolo RBR-10wckkk7.

INTRODUCTION: Global Active Stretching (GAS) can be a good strategy for improving posture and quality of life, as well as reducing pain. It works by stretching muscle chains and can improve ballet practice without major physical stress. OBJECTIVE: To verify the effects of GAS on posture, pain and quality of life of classical ballet dancers. MATERIALS AND METHODS: It was a randomized clinical trial from November 2020 to October 2021, consisting of 20 dancers (aged between 12 and 22 years), without orthopedic or recovering lesions, and without physical therapy treatment. They were divided into two groups. The control group, in which there was no intervention and the SGA group, which performed three postures twice a week for 15 minutes each, for total of 10 sessions. The Athlete's Quality of Life Questionnaire, The Nordic Musculoskeletal Questionnaire, and the Postural Assessment Software were evaluated using the t tests (independence), the t test (paired), the G test (contingency) and the Chi-square. RESULTS: There was no statistical difference in quality of life and pain, but in the control group there was an increase in body extension (0.003) and ankle dorsiflexion (0.01); and in the SGA group, there was an increase in left knee valgus (0.05), reduction of internal rotation of the femoral head (0.01) and left knee extension. CONCLUSION: There SGA affected only on posture of the dancers, but not their pain and quality of life. Brazilian Registry of Clinical Trials (ReBEC) protocol RBR-10wckkk7.

Effect of BCG on Respiratory Complications Caused by COVID-19: A Scoping Review.

Introduction: Bacillus Calmette-Guérin (BCG) has been shown to have protective effects against respiratory viruses. We conducted a scoping review of the literature to clarify the available evidence regarding the effect of BCG therapy in preventing respiratory complications of coronavirus disease 2019 (COVID-19). Methods: We searched PubMed, Embase, CENTRAL, Scopus, and Web of Science for related studies up to October 2022. Results: In total, 35 publications and trials were included. One animal study, two observational studies, and six finalized trials measured the effect of BCG administration on respiratory complications of COVID-19. The remaining publications included eight unfinished trials, 12 ecological studies, and six observational studies that did not directly measure respiratory complications but assessed overall mortality of the disease and were included as an adjunct to our study. All trials involved vaccinating adults to protect them against severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection, and measured respiratory symptoms or the need for intensive respiratory support as the primary or secondary aim of the study. One trial that exclusively included at-risk adults between 18 and 60 years old showed a decreased chance of respiratory complications as the secondary outcome of the study. Another trial that exclusively evaluated this effect on the elderly (60 years and older) as the primary aim of the study reported no protective effect against respiratory complications. The remaining literature provided mostly inconclusive evidence. Conclusion: The majority of the literature on the protective effect of BCG against respiratory complications of COVID-19 is inconclusive.

Açaí seed extract (ASE) rich in proanthocyanidins improves cardiovascular remodeling by increasing antioxidant response in obese high-fat diet-fed mice.

Obesity is recognized as an independent risk factor for cardiovascular diseases and is an important contributor to cardiac mortality. Açaí seed extract (ASE), rich in proanthocyanidins, has been shown to have potential anti-obesity effects. This study aimed to investigate the therapeutic effect of ASE in cardiovascular remodeling associated with obesity and compare it with that of rosuvastatin. Male C57BL/6 mice were fed a high-fat diet or a standard diet for 12 weeks. The ASE (300 mg/kg/day) and rosuvastatin (20 mg/kg/day) treatments started in the 8th week until the 12th week, totaling 4 weeks of treatment. Our data showed that treatment with ASE and rosuvastatin reduced body weight, ameliorated lipid profile, and improved cardiovascular remodeling. Treatment with ASE but not rosuvastatin reduced hyperglycemia and oxidative stress by reducing immunostaining of 8-isoprostane and increasing SOD-1 and GPx expression in HFD mice. ASE and rosuvastatin reduced NOX4 expression, increased SIRT-1 and Nrf2 expression and catalase and GPx activities, and improved vascular and cardiac remodeling in HFD mice. The therapeutic effect of ASE was similar to that of rosuvastatin in reducing dyslipidemia and cardiovascular remodeling but was superior in reducing oxidative damage and hyperglycemia, suggesting that ASE was a promising natural product for the treatment of cardiovascular alterations associated with obesity.

A "turn-off" fluorescent sensor based on electrospun polycaprolactone nanofibers and fluorene(bisthiophene) derivative for nitroaromatic explosive detection.

The preparation of fluorene(bisthiophene)-based fluorescent nanofibers for nitroaromatic explosive detection provides a convenient rapid and low-cost strategy aiming at forensic applications. Polycaprolactone (PCL) and fluorene(bisthiophene) derivative (FBT) nanofibers were obtained by electrospinning technique as a free-standing mat and characterized by SEM, FTIR, thermal analysis and fluorescence spectroscopy. The PCL/FBT nanofibers presented high sensitivity towards 2,4,6-trinitrotoluene (TNT) and picric acid (PA), with fluorescence quenching (turn-off mechanism), and selectivity to another kind of explosives. The free-standing mats were used as a cloth strip that was swiped on surfaces contaminated with TNT traces allowing its visual detection under UV light source. These findings are particularly important for the development of a facile and promising strategy to assembly portable optical devices for nitroaromatic explosive detection.