ABSTRACT: The effect of ultrasound on Biceps femoris muscle tenderness was investigated using a 22 Central Composite Rotatable Design (CCRD) with triplicates at the central point. We evaluated the following independent variables: ultrasound intensity ranging from 11.30 to 33.90 W cm-2 and exposure time between 35 and 205 s. The ultrasound bath’s frequency (80 kHz) and temperature (10 ºC) were the fixed ones. To validate the model, the muscle was treated at the CCRD’s optimized condition (80 kHz, 22.60 W cm-2, 120 s, 10 ºC) evaluated, and compared with the muscle control sample (non-treated). A 22% shear force reduction was observed compared to the control sample (no ultrasound treatment) after 144 h, and stored at 5 ºC. Moreover, a sarcoplasmic calcium concentration increase was noted for ultrasound-treated muscle, probably activating the calpain enzyme system. In contrast, no significant influence (P > 0.05) was observed for pH, color index, lipid oxidation, water holding capacity, and drip loss by ultrasound treatment at the optimized conditions. Therefore, ultrasound application is promising and suitable for improving muscle tenderness without losing meat quality. This study highlighted the ultrasound effect on the tenderness of a less studied muscle (Biceps femoris) by combining short ultrasound exposure (120 s) and an 80 kHz frequency.

RESUMO: O efeito do ultrassom sob a maciez do músculo Biceps femoris foi avaliado usando um Delineamento Composto Central Rotacional (DCCR) 22 com triplicatas no ponto central. As variáveis independentes estudadas foram a intensidade do ultrassom que variou de 11,30 a 33,90 W cm-2 e o tempo de exposição de 35 e 205 s. A frequência do banho de ultrassom (80 kHz) e a temperatura (10 ºC) foram fixas. Para validar o modelo, a carne foi tratada na condição otimizada do DCCR (80 kHz, 22,60 W cm-2, 120 s, 10 ºC), avaliada e comparada à amostra controle (não tratada). Uma redução de 22% na força de cisalhamento foi observada em comparação à amostra controle após 144 h e armazenada a 5 ºC. Além disso, um aumento da concentração de cálcio sarcoplasmático foi observado para o músculo tratado com ultrassom, o que provavelmente ativou o sistema enzimático da calpaína. Em contraste, o tratamento com ultrassom nas condições otimizadas não influenciou significativamente (P > 0,05) o pH, cor, oxidação lipídica, capacidade de retenção de água e perda de gotejamento. Portanto, a aplicação do ultrassom é promissora e adequada para melhorar a maciez do músculo sem perder a qualidade da carne. Este estudo destacou o efeito do ultrassom na maciez de um músculo pouco estudado (Biceps femoris) ao combinar exposição curta ao ultrassom (120 s) e uma frequência de 80 kHz.

ABSTRACT: Previous investigations have revealed that a functional fermented orange beverage presented in its composition different phenolic compounds, which through in silico investigation demonstrated to have biological effects of therapeutic importance as antioxidant, gastrorepair, and anti-ulcerative properties. Thus, this study confirmed in vivo, through a model of EtOH-induced gastric ulcers in rats, the beneficial properties indicated by the in silico tests. Gastric ulcer was induced by EtOH (intragastric) and was treated after 1 h with fermented orange beverage with and without Menthapiperita extract (0.5 mL/100 g w.b). Omeprazole was used as positive control. Histopathological evaluation revealed that EtOH administration resulted in the formation of gastric ulcers due to the reduction of the mucus layer, presence of hemorrhage, and infiltration of neutrophils in the stomach tissue of rats, and only treatment with omeprazole was able to reverse these changes. Additionally, EtOH administration altered the gastric juice volume and induced oxidative stress in the gastric tissue observed through the increase in lipid peroxidation (TBARS), reduction in the levels of non-protein thiols (NPSH), and alteration in the superoxide dismutase (SOD) activity. The ingestion of the fermented orange beverage increased NPSH levels and reduced changes in TBARS levels induced by ethanol. These findings suggested that the fermented orange beverage has antioxidant effects, as pointed out by in silico studies, but not gastrorepair and anti-ulcerative effects.

RESUMO: Investigações anteriores revelaram que uma bebida funcional fermentada de laranja apresentou em sua composição diferentes compostos fenólicos, que através de investigações in silico demonstraram ter efeitos biológicos de importância terapêutica como propriedades antioxidantes, gastroreparadoras e antiulcerativas. Assim, o objetivo deste estudo foi confirmar in vivo, através de um modelo de úlcera gástrica induzida por EtOH em ratos, as propriedades benéficas indicadas pelos ensaios in silico. A úlcera gástrica foi induzida por EtOH (intragástrico) e tratada após 1 h com bebida fermentada de laranja com e sem o extrato de Mentha piperita (0,5 mL/100 g peso corporal). Omeprazol foi usado como controle positivo. A avaliação histopatológica revelou que a administração de EtOH resultou na formação de úlceras gástricas decorrentes da redução da camada de muco, presença de hemorragia e infiltração de neutrófilos no tecido estomacal de ratos, sendo apenas o tratamento com omeprazol capaz de reverter essas alterações. Além disso, a administração de EtOH alterou o volume do suco gástrico e induziu estresse oxidativo no tecido estomacal observado através do aumento da peroxidação lipídica (TBARS), redução dos níveis de tióis não-proteicos (SHNP) e alteração da atividade da superóxido dismutase (SOD). A ingestão da bebida fermentada de laranja aumentou os níveis de SHNP e reduziu as alterações nos níveis de TBARS induzidos pelo EtOH. Esses achados sugerem que a bebida fermentada de laranja apresenta efeitos antioxidantes, conforme apontado por estudos in silico, mas não efeitos gastroreparadores e antiulcerativos.

Resumo O objetivo desta pesquisa é analisar a coexistência de comportamentos de risco modificáveis para doenças cardiovasculares (DCV) em adolescentes de 12 a 17 anos residentes no Brasil e sua influência no excesso de peso. Estudo epidemiológico nacional, transversal, de base escolar, com foco em estimar a prevalência de fatores de risco cardiovascular e síndrome metabólica em adolescentes de 12 a 17 anos matriculados em escolas públicas e privadas de municípios brasileiros que somam mais de 100 mil habitantes. O grade of membership foi utilizado para identificar a coexistência de fatores de risco entre os adolescentes. A amostra analítica foi composta por 71.552 adolescentes. De acordo com os dois perfis gerados, os adolescentes classificados no Perfil 2 mostraram comportamentos como fumar, consumo de álcool e dieta rica em alimentos ultraprocessados ≥ 80% da porcentagem do valor calórico total. Além disso, adolescentes com perfil de risco para DCV mostraram maior probabilidade de apresentar excesso de peso. O estudo encontrou coexistência de fatores de risco para DCV em adolescentes brasileiros, com destaque para tabagismo e consumo de bebidas alcoólicas. Além disso, demonstra associação entre fatores de risco para DCV e desfechos de saúde, como o excesso de peso.

Abstract The aim of the current research is to analyze the coexistence of modifiable risk behaviors for cardiovascular disease (CVD) in 12-to-17-year-old adolescents living in Brazil and their influence on overweight. National, cross-sectional, school-based epidemiological study focused on estimating the prevalence of cardiovascular risk factors and metabolic syndrome in 12 to 17 year old adolescents enrolled in public and private schools in Brazilian counties accounting for more than 100 thousand inhabitants. The grade of membership method was used to identify the coexistence of risk factors among adolescents. The analytical sample comprised 71,552 adolescents. According to the two herein generated profiles, adolescents classified under Profile 2 have shown behaviors such as smoking, alcohol consumption and diet rich in Ultra-processed food intake ≥ 80% of the percentage of total caloric value. In addition, adolescents presenting CVD risk profile have shown increased likelihood of being overweight. The study has found coexistence of risk factors for CVD in Brazilian adolescents, with emphasis on tobacco smoking and alcoholic beverage intake. In addition, it heads towards the analysis of the association between CVD risk factors and health outcomes, such as overweight.

Abstract The aim of the current research is to analyze the coexistence of modifiable risk behaviors for cardiovascular disease (CVD) in 12-to-17-year-old adolescents living in Brazil and their influence on overweight. National, cross-sectional, school-based epidemiological study focused on estimating the prevalence of cardiovascular risk factors and metabolic syndrome in 12 to 17 year old adolescents enrolled in public and private schools in Brazilian counties accounting for more than 100 thousand inhabitants. The grade of membership method was used to identify the coexistence of risk factors among adolescents. The analytical sample comprised 71,552 adolescents. According to the two herein generated profiles, adolescents classified under Profile 2 have shown behaviors such as smoking, alcohol consumption and diet rich in Ultra-processed food intake ≥ 80% of the percentage of total caloric value. In addition, adolescents presenting CVD risk profile have shown increased likelihood of being overweight. The study has found coexistence of risk factors for CVD in Brazilian adolescents, with emphasis on tobacco smoking and alcoholic beverage intake. In addition, it heads towards the analysis of the association between CVD risk factors and health outcomes, such as overweight.

Resumo O objetivo desta pesquisa é analisar a coexistência de comportamentos de risco modificáveis para doenças cardiovasculares (DCV) em adolescentes de 12 a 17 anos residentes no Brasil e sua influência no excesso de peso. Estudo epidemiológico nacional, transversal, de base escolar, com foco em estimar a prevalência de fatores de risco cardiovascular e síndrome metabólica em adolescentes de 12 a 17 anos matriculados em escolas públicas e privadas de municípios brasileiros que somam mais de 100 mil habitantes. O grade of membership foi utilizado para identificar a coexistência de fatores de risco entre os adolescentes. A amostra analítica foi composta por 71.552 adolescentes. De acordo com os dois perfis gerados, os adolescentes classificados no Perfil 2 mostraram comportamentos como fumar, consumo de álcool e dieta rica em alimentos ultraprocessados ≥ 80% da porcentagem do valor calórico total. Além disso, adolescentes com perfil de risco para DCV mostraram maior probabilidade de apresentar excesso de peso. O estudo encontrou coexistência de fatores de risco para DCV em adolescentes brasileiros, com destaque para tabagismo e consumo de bebidas alcoólicas. Além disso, demonstra associação entre fatores de risco para DCV e desfechos de saúde, como o excesso de peso.

Abstract Hereditary Hemochromatosis is a disorder characterized by iron deposition in several organs and hyperferritinemia. The most studied variants are linked to the HFE gene. In Brazil, surveys that characterize this population are scarce, with no sampling in the state of Rio Grande do Sul. Our objective is to carry out a data collection focusing on the profile of this population and the influence of the most frequently HFE variants. Two centers were enrolled: Hospital de Clínicas de Porto Alegre and Hospital São Vicente de Paulo. Patients with hyperferritinemia and undergoing phlebotomy were invited. Clinical data were collected, including HFE investigation. Among the descriptive data, the allele frequency of the C282Y variant (0.252) stands out, which differs from the national scenario. Systemic arterial hypertension was the most cited comorbidity. Differences between centers were observed, highlighting higher frequency of H63D cases in HSVP (p<0.01). Genotypes were stratified according to deleterious effect of C282Y variant. Higher transferrin saturation and number of phlebotomies were observed in the C282Y/C282Y cases (p<0.001). Positive family history for hyperferritinemia was more prevalent in compound heterozygotes (p<0.01). The results presented confirm the importance of encouraging such studies and reiterate the need for greater attention to this population.

Resumen En este artículo discutimos los usos de la categoría “acoso” empleada por jóvenes estudiantes de escuelas públicas de enseñanza media para dar sentido a la experiencia de violencia y discriminación de género ocurridas dentro y fuera de la escuela. El análisis se basa en registros de trabajo en campo producidos en el ámbito de una investigación multicéntrica y de métodos mixtos, realizada en nueve escuelas de São Paulo (SP/BR). El acoso parece como una categoría polisémica que, al nombrar la violencia, ayuda en el enfrentamiento de las jerarquías y desigualdades de género y generación. Concluimos que las jóvenes han puesto en tela de juicio normativas y actitudes que alimentan las desigualdades de género de las escuelas, además de denunciar el silenciamiento o la inadecuación de la institución en el enfrentamiento del problema, lo que posibilita la identificación de convergencias con una nueva sensibilidad alrededor de la violencia contra mujeres que los discursos feministas globalizados hicieron surgir.

Abstract In this article, we discuss uses of “harassment” as a category employed by young students from public high schools to make sense of violence and gender discrimination experiences that occur in and out of school. The analysis is based on fieldwork records produced within the scope of a multicenter, mixed-methods research carried out in nine schools located in São Paulo. Harassment appears as a polysemic category that, by naming violence, helps to face gender and generation hierarchies and inequalities. We infer that the young girls have questioned norms and attitudes that feed gender inequalities in schools; in addition, they have denounced the silence or inadequacy of the institution in facing the problem. This enables to identify convergences with a new sensibility regarding violence against women that globalized feminist discourses have brought to the surface.

Neste artigo, discutimos os usos da categoria “assédio” empregada por jovens estudantes de escolas públicas de Ensino Médio para dar sentido a experiências de violência e discriminação de gênero ocorridas dentro e fora da escola. A análise baseia-se em registros de trabalho de campo produzidos no âmbito de uma pesquisa multicêntrica e de métodos mistos, realizada em nove escolas de São Paulo (SP/BR). O assédio aparece como uma categoria polissêmica que, ao nomear a violência, ajuda no enfrentamento das hierarquias e desigualdades de gênero e geração. Depreendemos que as jovens têm questionado normativas e atitudes que alimentam as desigualdades de gênero nas escolas, além de denunciarem o silenciamento ou inadequação da instituição no enfrentamento do problema, o que possibilita identificar convergências com uma nova sensibilidade em torno da violência contra mulheres que os discursos feministas globalizados fizeram emergir.

Abstract: Oriented Strand Board is a structural wood composite with applications that require good physical and mechanical performance. The addition of ZnO nanoparticles is an alternative that has been studied in order to improve the properties of Oriented Strand Board panels. However, there is no information about its effect Oriented Strand Board. The aim of this work was to evaluate the influence of the addition of zinc oxide nanoparticles in two different percentages (0,25 % and 0,50 %) on the physical-mechanical properties of Oriented Strand Board panels produced with phenol-formaldehyde resin and on the heat transfer during hot-pressing. Oriented Strand Board panels were produced and tested according to European Standards. The addition of ZnO nanoparticles improved the dimensional stability of the panel, reducing its thickness swelling, and also increased the screw withdraw strength. The heat transfer during hot-pressing increased the temperature more quickly on boards with nanoparticles addition; on the other hand the final temperature of the control treatment was higher.

Abstract The demands of high-quality zucchini fruits by the consumer market make studies regarding the improvement of cultivation systems, such as plant nutrition and salinity tolerance. Considering the demands of the consumer market for the high quality of zucchini fruits, it is necessary studies regarding the improvement of production systems for this improvement, such as nutrition and salinity tolerance to plant. Thus, this study aimed to evaluate the zucchini fruits quality characteristics, grown in soilless, under N:K ratios, and levels of electrical conductivity of the nutrient solution. The experiment was conducted in a protected environment in pots with 8.2 dm3 of volumetric capacity filled with commercial substrate. The trial design adopted was randomized blocks, with three replicates, in a 5x3 factorial scheme, with five levels of electrical conductivity (1.0; 2.0; 3.0; 4.0; and 5.0 dS m-1) and three N:K ratios (2:1; 1:1; and 1:2), both in the nutrient solution. The application of the nutrient solution was by fertigation through drip irrigation. Throughout the experiment, variables related to fruit quality and total plant biomass production were analyzed. The increase of the electrical conductivity in the nutrient solution provided an increase in the values of fruits organoleptic properties. Regarding the nutrient solution N:K ratios, the 1:2 ratio provided larger fruits and a higher percentage of water.

Abstract In this article, we discuss uses of “harassment” as a category employed by young students from public high schools to make sense of violence and gender discrimination experiences that occur in and out of school. The analysis is based on fieldwork records produced within the scope of a multicenter, mixed-methods research carried out in nine schools located in São Paulo. Harassment appears as a polysemic category that, by naming violence, helps to face gender and generation hierarchies and inequalities. We infer that the young girls have questioned norms and attitudes that feed gender inequalities in schools; in addition, they have denounced the silence or inadequacy of the institution in facing the problem. This enables to identify convergences with a new sensibility regarding violence against women that globalized feminist discourses have brought to the surface.

Resumen En este artículo discutimos los usos de la categoría “acoso” empleada por jóvenes estudiantes de escuelas públicas de enseñanza media para dar sentido a la experiencia de violencia y discriminación de género ocurridas dentro y fuera de la escuela. El análisis se basa en registros de trabajo en campo producidos en el ámbito de una investigación multicéntrica y de métodos mixtos, realizada en nueve escuelas de São Paulo (SP/BR). El acoso parece como una categoría polisémica que, al nombrar la violencia, ayuda en el enfrentamiento de las jerarquías y desigualdades de género y generación. Concluimos que las jóvenes han puesto en tela de juicio normativas y actitudes que alimentan las desigualdades de género de las escuelas, además de denunciar el silenciamiento o la inadecuación de la institución en el enfrentamiento del problema, lo que posibilita la identificación de convergencias con una nueva sensibilidad alrededor de la violencia contra mujeres que los discursos feministas globalizados hicieron surgir.

Neste artigo, discutimos os usos da categoria “assédio” empregada por jovens estudantes de escolas públicas de Ensino Médio para dar sentido a experiências de violência e discriminação de gênero ocorridas dentro e fora da escola. A análise baseia-se em registros de trabalho de campo produzidos no âmbito de uma pesquisa multicêntrica e de métodos mistos, realizada em nove escolas de São Paulo (SP/BR). O assédio aparece como uma categoria polissêmica que, ao nomear a violência, ajuda no enfrentamento das hierarquias e desigualdades de gênero e geração. Depreendemos que as jovens têm questionado normativas e atitudes que alimentam as desigualdades de gênero nas escolas, além de denunciarem o silenciamento ou inadequação da instituição no enfrentamento do problema, o que possibilita identificar convergências com uma nova sensibilidade em torno da violência contra mulheres que os discursos feministas globalizados fizeram emergir.

ABSTRACT Objective: to analyze pediatric patient safety in the administration of blood components. Method: a documentary and retrospective study, developed at a hospital in the Brazilian Midwest region. Data collection took place through medical records and 234 transfusions were identified, performed in 90 patients aged from zero to twelve years old, hospitalized between July and December 2020. An instrument based on good practice guidelines about blood components was used. Descriptive and inferential statistics were used for data analysis. Results: the transfusions were predominantly performed in breastfeeding infants (71.1%). Blood transfusions in critical sectors stood out (86.3%), as well as with indication of a clinical order (87.2%) and prescription of packed red blood cells (75.3%). The Nursing reports identified adverse events (n=05) and incidents (n=13) that were associated with inadequacies between the prescribed and infused volumes and the request and administration time (p<0.001), although no notification was formalized in the institution during the period. Conclusion: the administration of blood components presented nonconformities, which results in risk situations for pediatric patients.

RESUMEN Objetivo: analizar la seguridad de pacientes pediátricos al administrar hemocomponentes. Método: estudio documental y retrospectivo, desarrollado en un hospital de la región Centro-Oeste de Brasil. Los datos se recolectaron a través de historias clínicas y se identificaron 234 transfusiones, realizadas en 90 pacientes de cero a doce años de edad, internados entre los meses de julio y diciembre de 2020. Se empleó un instrumento basado en directrices de buenas prácticas de hemocomponentes. Para el análisis se utilizó estadística descriptiva e inferencial. Resultados: las transfusiones se realizaron predominantemente en lactantes (71,1%). Hubo predominio de transfusiones sanguíneas en sectores críticos (86,3%), con indicación de orden clínico (87,2%) y prescripción de concentrado de glóbulos rojos (75,3%). En los informes de Enfermería se identificaron eventos adversos (n=05) e incidentes (n=13) que estuvieron asociados a inconsistencias entre los volúmenes prescripto e infundido y al tiempo de solicitud y administración (p<0,001), aunque no se formalizó ninguna notificación en la institución durante el período investigado. Conclusión: la administración de hemocomponentes presentó inconformidades, lo que deriva en situaciones de riesgo para los pacientes pediátricos.

RESUMO Objetivo: Analisar a segurança do paciente pediátrico na administração de hemocomponentes. Método: Estudo documental, retrospectivo, desenvolvido em um hospital da região Centro-Oeste do Brasil. A coleta de dados ocorreu através de prontuários e foram identificadas 234 transfusões, realizadas em 90 pacientes de zero a doze anos, internados entre os meses de julho a dezembro de 2020. Utilizou-se instrumento baseado em diretrizes de boas práticas de hemocomponentes. Para a análise foi utilizada estatística descritiva e inferencial. Resultados: As transfusões ocorreram predominantemente em lactentes (71,1%). Sobressaíram hemotransfusões em setores críticos (86,3%), com indicação de ordem clínica (87,2%) e a prescrição de concentrado de hemácias (75,3%). Identificou-se no relatório de enfermagem eventos adversos (n=05) e incidentes (n=13) que se associaram a inadequações entre volume prescrito e infundido e ao tempo de solicitação e administração (p<0,001), embora nenhuma notificação foi formalizada na instituição durante o período. Conclusão: A administração de hemocomponentes apresentou inconformidades, o que resulta em situações de risco ao paciente pediátrico.

Abstract This study aimed to evaluate the influence of cladode pruning on apical dominance in the production and post-harvest of pitaya fruits. The experiment was carried out at the Sítio das Pitaya do Pará, which is in the city of Tomé-Açu, State of Pará, Brazil. A randomized block design (RBD) in a 3 x 2 factorial scheme was used, with four replications for each treatment. Treatments consisted of three stand positions in the field (beginning, middle, and end of row) and two pruning regimes (with and without pruning). The interaction of factors Pruning and Stand position (P*SP) inhibited sprouting, while the Pruning factor provided heavier fruits and with a better pulp/peel ratio. Thus, cladode pruning provided benefits to plant management, production parameters, and post-harvest quality.

Resumen El objetivo de este estudio fue evaluar la influencia de la poda de cladodios sobre la dominancia apical en la producción y poscosecha de frutos de pitaya. El experimento se llevó a cabo en el Sitio Pitaya do Brasil, ubicado en el municipio de Tomé-Açu, Estado de Pará, Brasil. Se utilizó un diseño de bloques al azar (RBD) en un esquema factorial 3 x 2 con cuatro repeticiones de cada tratamiento. Los tratamientos consistieron en tres posiciones de rodales en campo (inicio, medio y final de hilera) y dos tipos de poda (con y sin poda). La interacción de los factores Poda y Posición del Stand (P*SP), inhiben la brotación, mientras que el factor Poda proporciona frutos con mayor masa y mejor relación pulpa/cáscara. Así, la poda de cladodios proporcionó beneficios para el manejo de la planta, los parámetros de producción y la calidad poscosecha.

RESUMO: O objetivo desta revisão foi abordar a aplicabilidade da nanotecnologia na medicina veterinária, com ênfase nas pesquisas no Brasil de 2013 a 2020. Primeiramente, apresentam-se os aspectos gerais da aplicabilidade da nanotecnologia em medicina veterinária e, posteriormente, apontam-se as pesquisas envolvendo nanociência realizadas no Brasil, no período estudado. A nanotecnologia é o campo da ciência capaz de organizar a matéria em estruturas de nanoescala (1 a 100 nm), permitindo inovações em diferentes áreas, incluindo biotecnologia, agricultura, diagnóstico de doenças, indústria de alimentos e vestuário, eletrônica e terapias farmacológicas. Na medicina veterinária, diversos estudos estão sendo realizados no mundo, principalmente nas áreas que envolvem a busca de novas opções de tratamento e o desenvolvimento de imunoterapia, bem como no diagnóstico de doenças. No Brasil, está claro que o uso da nanotecnologia na medicina veterinária ainda é incipiente, mas pode ser considerada uma área em crescimento. Além disso, vários pontos devem ser refletidos e pesquisados, incluindo alguns efeitos adversos e implicações para validar o uso seguro da nanotecnologia na medicina veterinária. Nesta revisão, destaca-se a nanotecnologia como uma alternativa promissora no atual contexto de inovação tecnológica brasileira, envolvendo saúde animal, o diagnóstico e o potencial uso terapêutico no controle de doenças em medicina veterinária. Em relação às perspectivas futuras, acredita-se que maiores investimentos em ciência e tecnologia são fatores fundamentais a contribuir para o avanço e fortalecimento da nanotecnologia no Brasil.

ABSTRACT: The purpose of this review was to address the applicability of nanotechnology in veterinary medicine, with an emphasis on research in Brazil from 2013 to 2020. Firstly, we introduced to the general aspects of applicability of nanotechnology in veterinary medicine, and lately we pointed the research involving nanoscience performed in Brazil, in the studied period. Nanotechnology is the field of science that has the capacity to organize matter in nanoscale structures (1 to 100 nm), enabling innovations in different areas including biotechnology, agriculture, disease diagnosis, food and clothing industry, electronics, and pharmacological therapies. In veterinary medicine, several studies are being carried out in the world, mainly in the areas that involve search of new treatment options and the development of immunotherapy, as well as in the diagnosis of diseases. In Brazil, it is clear that the use of nanotechnology in veterinary medicine is still incipient, but it can be considered a growing area. In addition, several points have to be reflected and researched, including some adverse effects and implications to validate the safe use of nanotechnology in veterinary medicine. Therefore, this review highlighted the nanotechnology as a promise alternative in the current context of Brazilian technological innovation involving animal health, as well as a possible diagnostic tool and highlighting its potential therapeutic use in disease control in veterinary medicine. Regarding future perspectives, we believed that greater investment in science and technology could contribute to the advancement and strengthening of nanotechnology in Brazil.

Aim Although bulk fill composites have been widely used as restorative material, there is no consensus regarding the best clinical protocol in terms of composite technique and adhesive system. Therefore, this clinical trial evaluated the clinical performance of bulk fill composites for class I restorations under different protocols. Methods A randomized clinical trial including 155 class I restorations was conducted using different adhesive systems: conventional technique (phosphoric acid + conventional three-step adhesive system) (Group 1, 2 and 3); or self-etching adhesive system (Groups 4, 5 and 6). Control groups 1 and 4 were restored with conventional composite; groups 2 and 5 with low viscosity bulk fill and conventional composite as occlusal coverage; groups 3 and 6 with high viscosity bulk fill. The FDI criteria was used for clinical evaluation at baseline and after 6 months. Results All groups showed good clinical performance. At baseline, the adhesive system did not affect postoperative hypersensitivity. After 6 months, group 5 showed a significant reduction in color and translucency; group 6 a reduction in terms of anatomical form and for postoperative sensitivity and an improvement in patient satisfaction (p<0.05). Considering the same restorative technique, the use of the self-etching adhesive system showed a significant decrease in color and translucency (p<0.05). Conclusion All groups showed favorable clinical performance, and promising results were found for the conventional adhesive system and high viscosity bulk fill protocol.

Abstract Objectives: To determine the incidence and risk of adverse obstetric and neonatal outcomes according to SARS-CoV-2 infection severity in pregnant women. Method: Open prospective study of pregnant women tested for SARS-CoV-2 by serological and molecular assays during pregnancy or delivery in two hospitals in Sao Paulo, Brazil from April 12, 2020, to February 28, 2021. Five groups were considered for analysis: C0, negative COVID-19 results and no COVID-19 symptoms; C1, positive COVID-19 results, and no symptoms; C2, positive COVID-19 results with mild symptoms; C3, positive COVID-19 results with moderate symptoms; and C4, positive COVID-19 results with severe symptoms. The association between obstetric and neonatal outcomes and COVID-19 severity was determined using multivariate analysis. Results: 734 eligible pregnant women were enrolled as follows: C0 (n = 357), C1 (n = 127), C2 (n = 174), C3 (n = 37), and C4 (n = 39). The following pregnancy and neonatal outcomes were associated with severe COVID-19: oligohydramnios (adjusted Odds Ratio [aOR] = 6.18; 95% CI 1.87‒20.39), fetal distress (aOR = 4.01; 95% Confidence Interval [CI] 1.84‒8.75), preterm birth (aOR = 5.51; 95% CI 1.47‒20.61), longer hospital stay (aOR = 1.66; 95% CI 1.36‒2.02), and admission to the neonatal intensive care unit (aOR = 19.36; 95% CI, 5.86‒63.99). All maternal (n = 6, 15.4%, p < 0.001) and neonatal (n = 5, 12.5%, p < 0.001) deaths and most fetal deaths (n = 4, 9.8%, p < 0.001) occurred in C4 group. Moderate COVID-19 was associated with oligohydramnios (aOR = 6.23; 95% CI 1.93‒20.13) and preterm birth (aOR = 3.60; 95% CI 1.45‒9.27). Mild COVID-19 was associated with oligohydramnios (aOR=3.77; 95% CI 1.56‒9.07). Conclusion: Adverse pregnancy and neonatal outcomes were associated with maternal symptomatic COVID-19 status, and risk increased with disease severity. HIGHLIGHTS COVID-19 increases the rates of adverse pregnancy and neonatal outcomes. Serious cases are associated with oligohydramnios, fetal distress, prematurity, neonatal ICU admission, maternal and neonatal deaths. The maternal clinical status dictates obstetric and neonatal outcomes.

Abstract: Purpose: to evaluate the effect of dentifrice pH and fluoride concentration ([F]) on fluoride uptake on the biofilm and nails of children from a non-fluoridated area. Methods: two hundred and twenty-eight two- to four-year-old children were randomly allocated into 3 groups according to the type of dentifrice: G1: 1100 μg F/g, pH 4.5 (n = 76); G2: 750 μg F/g, pH 4.5 (n = 74); and G3: 1100 μg F/g, pH 7.0 (n = 78). Nails were collected at 4, 8, and 12 months after starting dentifrice use and biofilm was collected 5 and 60 minutes after toothbrushing. The concentrations of F in nails and biofilm were analyzed by HMDS facilitated diffusion. Data were analyzed by Kruskal-Wallis/Mann-Whitney's test and the comparison between biofilm collection times was done using Wilcoxon test (p £ 0.05). Results: a significant reduction of [F] in biofilm was observed 60 minutes after toothbrushing, regardless of the dentifrice used. However, 5 minutes after toothbrushing, G1 had a significantly higher [F] compared to G2 and G3, and 60 minutes after toothbrushing, [F] was significantly higher for G1 and G2 compared to G3. G1 and G3 had significantly higher [F] in the nails compared to G2. Conclusion: a lower dentifrice concentration is a relevant factor for the reduction of excessive fluoride intake. The use of a low-F acidified dentifrice combines the reduction of fluoride uptake with caries prevention by leading to greater incorporation of F into the biofilm over time.