Sistema removedor de galhos na fabricação de componentes plásticos moldados por injeção

Tendo em vista que o processo de moldagem por injeção é um dos processos fabris mais utilizados na atualidade, esse estudo busca automatizar parte do processo produtivo removendo os galhos de injeção decorrentes do processo de moldagem, utilizando um dispositivo removedor de galhos de injeção, aqui chamado de desgalhador, embutido no molde do produto. O desgalhador consiste em um mecanismo de acionador e seguidor, acionado pneumaticamente e integrado às portas I/O da máquina injetora, que utiliza-se de tensão cisalhante para cortar o galho. Por fim, o desgalhador será instalado em um molde de injeção já existente, que sofrerá adaptações para receber o sistema.Considering that the injection molding process is one of the most used manufacturing processes today, this study seeks to automate part of the production process by removing the injection sprues resulting from the molding process, using an injection sprue remover device, here called desprueing device, built into the mold of the product. The desprueing device consists of an actuator and follower mechanism, pneumatically driven and integrated into the I/O ports of the injection molding machine, which uses shear tension to cut the sprue. Finally, the desprueing will be installed in an existing injection mold, which will undergo adaptations to receive the system

Potassium Nutrition in Fruits and Vegetables and Food Safety through Hydroponic System

Although it is not an element with structural function in plants, potassium (K) is demanded in considerable quantities by plants due to multifunctional role in plant physiology and metabolism. Nevertheless, the interface of plant mineral nutrition and food safety evidences needs for a better understanding of functional mechanisms of this nutrient in plants, taking into account its management in hydroponic cultivation and food production with nutritional quality. Thus, the nutritional content of K in vegetables is indicative of post-harvest and nutritional quality. This fact is important considering that modern life has induced increased consumption of processed foods whose preparation implies reduction of K levels and increase of Na levels, with the consequent low K intake and appearance of diseases related to insufficient intake. Therefore, the present chapter aimed to address main nutritional, physiological, and biochemical aspects of K in a context of hydroponic plant production and importance of potassium nutrition to human health

MEIO AMBIENTE DO TRABALHO RURAL E PULVERIZAÇÃO AÉREA DE AGROTÓXICOS NA AGRICULTURA: O CASO DA AÇÃO DIRETA DE INCONSTITUCIONALIDADE (ADI) 6137/2019

O uso de agrotóxicos na produção agrícola submete os ecossistemas, a biodiversidade e os seres humanos, principalmente de trabalhadores(as) rurais, a graves riscos e danos à saúde e à vida, notadamente quando a técnica de aplicação se dá por meio da pulverização aérea no campo. Por esse motivo, o Estado do Ceará editou a Lei n.º 16.820/2019, proibindo a pulverização aérea de agrotóxicos em seu território e estabelecendo sanção pelo respectivo descumprimento, contra a qual foi proposta a ADI 6137/2019 perante o STF. Este artigo objetiva descrever os fundamentos dessa ADI e da decisão nela proferida, sob a perspectiva da proteção do meio ambiente do trabalho rural e da saúde dos rurícolas. O método utilizado é o dedutivo e as técnicas de pesquisa são a bibliográfica e a documental. Concluiu-se que o voto proferido nessa ADI apresentou fundamentos protetivos ao meio ambiente e à saúde dos trabalhadores rurais

Método de simulação ergonômica e simulador eletrônico de ergonomia

Universidade Federal do Rio Grande do SulArquiteturaDepositad

Medical Students’ Awareness About Value-Based Health Care in Brazil: A Cross Sectional Study

Background: Rising healthcare costs demand a transition from the current fee-for-service to a Value-Based Health Care (VBHC) Model. This requires that all future doctors to understand the VBHC Model. We aimed to evaluate the VBHC awareness among Brazilian medical students and to identify it’s associated intrinsic/extrinsic factors through a survey-based, cross-sectional study. Methods: An online survey was sent to students from Brazilian medical schools. A descriptive analysis based on participants' level of awareness about VBHC was performed. The categorical variables included were absolute and relative frequencies using chi-square tests. A multivariate binary logistic regression analysis was performed by calculating the odds ratio (OR) and 95% confidence intervals (95%CI) to compare each response according to VBHC awareness. Results: We collected 3030 responses from 148 Medical Schools across all Brazilian states. Medical students were compared into 2 groups; 1 was familiar with VBHC (14%; 426); 2 were not (86%; 2575). The univariate analysis showed that group 1 was more willing to share clinical outcomes/costs data related to their practice (57.04%) compared to 2 (48.12%), p<0.01. The multivariate analysis showed that internship experience was the most relevant factor associated with VBHC exposure (OR 4.32 [CI 95% 1.82 - 10.24]). Conclusion: We found that few medical students understand VBHC concepts, and that exposure was due to self-education efforts. Our results suggest that medical schools have the potential to reinforce both intrinsic and extrinsic factors related to students with regards to VBHC knowledge in order to prepare future doctors to practice in a value-driven context

Body composition and protein and energy net requeriments of steers of four genetic groups finished in feedlot

Objetivou-se neste estudo avaliar a composição corporal e as exigências para crescimento de bovinos de quatro grupos genéticos em confinamento. Utilizou-se a metodologia de abate comparativo, com delineamento inteiramente ao acaso, com quatro tratamentos: Nelore (NE), ½ Aberdeen Angus + ½ Nelore (AN), ½ Canchim + ½ Nelore (CN) e ½ Simental + ½ Nelore (SN). Quarenta e sete animais castrados, com média de 22 meses de idade e peso em jejum de 310 kg, foram confinados por 101 dias. A dieta experimental continha 13,34% de proteína bruta (PB) e 71,81% de nutrientes digestíveis totais (NDT). A composição do corte da 9ª-10ª-11ª costelas foi utilizada para estimar a composição do corpo vazio. Bovinos AN (428 kg) e SN (410 kg) não diferiram quanto ao peso final de corpo vazio, que foi semelhante também entre os animais CN, NE e SN (389, 390 e 410 kg, respectivamente). Animais AN tiveram maior proporção de gordura no corte das costelas, porém menor proporção de músculo. A menor porcentagem de ossos no corte das costelas foi observada nos animais da raça Nelore. Os grupos AN e SN tiveram maior proporção de extrato etéreo (EE) e menor porcentagem de água no corpo vazio no momento do abate. Animais AN, NE e SN não diferiram quanto à taxa de deposição de energia (6,06, 5,20 e 5,80 Mcal/dia, respectivamente). O grupo AN não diferiu dos grupos CN e SN quanto à proporção de EE na composição do ganho de peso do corpo vazio. Bovinos SN apresentaram maior exigência de proteína (0,164 kg/kg de ganho de peso vazio - GPV) e os animais AN e CN, o menor valor (0,140 e 0,142 kg/kg de GPV, respectivamente). Animais AN tiveram a maior exigência líquida de energia para ganho (4,685 Mcal/kg de GPVz).The body composition and protein and energy requirements for growth of steers of four genetic groups finished in feedlot were evaluated in this experiment. comparative slaughter method was used in a completely randomly experimental design, with four treatments: Nellore (NE), ½ Aberdeen Angus + ½ Nellore (AN), ½ Canchim + ½ Nellore (CN) e ½ Simmental + ½ Nellore (SN). Forty-seven steers averaging 310 kg initial shrunk body weight (SBW) and 22 months were fed during 101 days in a feedlot. Diet on feedlot had the following composition: crude protein, 13.34%; rumen degradable protein, 9.35%; and total digestible nutrients, 71.81% (estimated value). Composition of the 9th-10th-11th ribs was used to calculate empty body composition. No significant differences were found between AN (428 kg) and SN (410 kg) in final empty body weight (EBW), and similarly among CN, NE and SN (389, 390 and 410 kg, respectively), but EBW of AN steers was greater than that of CN and NE cattle. AN steers had higher amount of fat percentage on rib cut. However, less proportion of muscle was observed in the AN group and less bone percentage at the rib cut of the Nelore breed. AN and SN groups had the largest concentration of ether extract and the smallest amount of water percentage on the empty body at slaughter. Steers of AN, NE and SN groups were similar in rate of energy deposition (6.06, 5.20 and 5.80 Mcal/day, respectively). There was no difference among AN and CN cattle on ether extract in empty body weight gain. Simmental × Nelore demonstrated the greatest requirements of protein (0.164 kg/kg of EWG), and AN and CN cattle (0.140 and 0.142 kg/kg of EWG, respectively), the smallest. Angus × Nelore animals required the greatest net energy for gain (4.685 Mcal/kg of EWG).FapespEmbrapa Pecuária SudesteUSP - ESALQ e Instituto de Zootecni

Current situation of Chagas disease vectors (Hemiptera, Reduviidae) in Southern Rio Grande do Sul State, Brazil

Chagas disease (CD) has been considered endemic in the South of Rio Grande do Sul (RS) State, Brazil. This study aimed at evaluating the occurrence of Trypanosoma cruzi vectors based on the main species captured in Southern Rio Grande do Sul State from 2008 to 2019. The study area comprised counties that belong to the 3rd Regional Health Coordination (RHC) and to the 7th RHC, whose headquarters are in Pelotas and Bage, respectively. The study was based on secondary data provided by the partnership between the Federal University of Pelotas, Rio Grande do Sul State (UFPel-RS) and the State Health Surveillance Center in RS (SCHS-RS). One thousand and four hundred triatomines were captured in the area supervised by the 3rd RHC, mainly in Cangucu (37.7%), Piratini (22.4%) and Pinheiro Machado (15.1%), while, in the area supervised by the 7th RHC, the largest number of triatomines was captured in Lavras do Sul (64.15%). In both areas, Triatoma rubrovaria (90.6%) and Panstrongylus tupynambai (7.4%) were the most common species. Most were captured inside households but T. cruzi-positive insects were not found in the period under study. The results of this study show that, in Southern Rio Grande do Sul State, there is still a high rate of triatomine household invasion and dispersal, mainly by T. rubrovaria. Thus, the entomological surveillance should be maintained with the participation of the population and further studies should be deepened in the area