Abstract This study investigates whether trust in government policies has a mediation effect between the students’ perception of COVID-19 health risk and their life satisfaction. In order to test the mediation effect, this study utilizes data collected from undergraduate students at Tecnológico de Monterrey in Mexico by means of online survey. The survey yielded 95 usable data out of 97. The valid results were tested via generalized linear model (GLM) Mediation approach for the mediation. Empirical findings of Delta method affirm the mediation (estimate = 0.4445, β = 0.474, z = 3.699, p < .001) role of trust in government as a mediator between students’ perception of COVID-19 health risk and their life satisfaction. In other words, Mexican undergraduate students are of the view that trusting government plays a crucial role as a mediator between their perception of coronavirus health risk and life satisfaction. These findings may guide the governments’ policy making efforts and motivate them to support their initiatives with trust-building efforts.

Resumo Este estudo investiga se a confiança nas políticas governamentais tem um efeito de mediação na percepção dos estudantes sobre o risco de saúde da COVID-19 e a satisfação de vida. A fim de testar o efeito de mediação, o estudo utiliza dados recolhidos de estudantes universitários do Tecnológico de Monterrey, no México. O inquérito produziu 95 dados utilizáveis de um total de 97. Os resultados válidos foram testados por meio da abordagem de mediação do modelo linear generalizado (GLM). Os resultados empíricos do método Delta afirmam (estimativa = 0,4445, β = 0,474, z = 3,699, p < .001) o papel de confiança no governo como mediador entre a percepção dos estudantes sobre o risco de saúde da COVID-19 e sua satisfação de vida. Em outras palavras, para os estudantes de graduação mexicanos a confiança no governo desempenha papel crucial como mediador entre suas percepções sobre o risco de saúde do coronavírus e a satisfação de vida. As conclusões do estudo podem orientar os esforços dos governos na elaboração de políticas e motivá-los a apoiar iniciativas de criação de confiança.

Abstract This paper aims to assess the differences and associations of the effect of COVID-19 on sleep habits, sleep quality, and burnout symptoms among faculty members of higher education in Mexico. This was a cross-sectional study with a total sample of 214 faculty members of higher education from Mexico between May 18th and June 10th of 2020. We applied questionnaires containing sociodemographic and specific questions regarding sleep habits, sleep quality, and burnout symptoms. The results show that during COVID-19 faculty members delayed their bedtime and rise time. No change was found with weekdays time in bed, however, during weekends, time in bed was more than an hour shorter. Social jetlag decreased significantly during COVID-19. Furthermore, during COVID-19, those who reported low sleep quality were more likely to report higher symptoms of emotional exhaustion and those who slept less on weekends were more likely to report higher symptoms of depersonalization. These results suggest that the COVID-19 pandemic may have an effect on sleep and sleep quality and burnout symptoms of faculty members from higher education in Mexico.

Resumo Este trabalho visa avaliar as diferenças e associações do impacto da COVID-19 sobre hábitos de sono, qualidade do sono e sintomas de burnout entre os docentes de ensino superior no México. Trata-se de um estudo transversal, com amostra total de 214 docentes, realizado entre 18 de maio e 10 de junho de 2020. Foram aplicados questionários contendo questões sociodemográficas e específicas sobre hábitos de sono, qualidade do sono e sintomas de burnout. Os resultados mostram que durante a pandemia os docentes atrasaram a hora de dormir e acordar. Nenhuma alteração foi observada com relação ao tempo de semana na cama, porém nos finais de semana o tempo na cama era mais de uma hora menor. O jetlag social diminuiu significativamente durante a COVID-19. Além disso, durante a pandemia, aqueles que relataram baixa qualidade do sono eram mais propensos a relatar sintomas mais fortes de exaustão emocional, e aqueles que dormiam menos nos fins de semana eram mais propensos a relatar sintomas mais fortes de despersonalização. Esses resultados sugerem que a pandemia de COVID-19 pode ter um efeito sobre a qualidade do sono e causar sintomas de burnout nos integrantes do corpo docente do ensino superior no México.

Resumo Este estudo investiga se a confiança nas políticas governamentais tem um efeito de mediação na percepção dos estudantes sobre o risco de saúde da COVID-19 e a satisfação de vida. A fim de testar o efeito de mediação, o estudo utiliza dados recolhidos de estudantes universitários do Tecnológico de Monterrey, no México. O inquérito produziu 95 dados utilizáveis de um total de 97. Os resultados válidos foram testados por meio da abordagem de mediação do modelo linear generalizado (GLM). Os resultados empíricos do método Delta afirmam (estimativa = 0,4445, β = 0,474, z = 3,699, p < .001) o papel de confiança no governo como mediador entre a percepção dos estudantes sobre o risco de saúde da COVID-19 e sua satisfação de vida. Em outras palavras, para os estudantes de graduação mexicanos a confiança no governo desempenha papel crucial como mediador entre suas percepções sobre o risco de saúde do coronavírus e a satisfação de vida. As conclusões do estudo podem orientar os esforços dos governos na elaboração de políticas e motivá-los a apoiar iniciativas de criação de confiança.

Abstract This study investigates whether trust in government policies has a mediation effect between the students’ perception of COVID-19 health risk and their life satisfaction. In order to test the mediation effect, this study utilizes data collected from undergraduate students at Tecnológico de Monterrey in Mexico by means of online survey. The survey yielded 95 usable data out of 97. The valid results were tested via generalized linear model (GLM) Mediation approach for the mediation. Empirical findings of Delta method affirm the mediation (estimate = 0.4445, β = 0.474, z = 3.699, p < .001) role of trust in government as a mediator between students’ perception of COVID-19 health risk and their life satisfaction. In other words, Mexican undergraduate students are of the view that trusting government plays a crucial role as a mediator between their perception of coronavirus health risk and life satisfaction. These findings may guide the governments’ policy making efforts and motivate them to support their initiatives with trust-building efforts.

Resumo Este trabalho visa avaliar as diferenças e associações do impacto da COVID-19 sobre hábitos de sono, qualidade do sono e sintomas de burnout entre os docentes de ensino superior no México. Trata-se de um estudo transversal, com amostra total de 214 docentes, realizado entre 18 de maio e 10 de junho de 2020. Foram aplicados questionários contendo questões sociodemográficas e específicas sobre hábitos de sono, qualidade do sono e sintomas de burnout. Os resultados mostram que durante a pandemia os docentes atrasaram a hora de dormir e acordar. Nenhuma alteração foi observada com relação ao tempo de semana na cama, porém nos finais de semana o tempo na cama era mais de uma hora menor. O jetlag social diminuiu significativamente durante a COVID-19. Além disso, durante a pandemia, aqueles que relataram baixa qualidade do sono eram mais propensos a relatar sintomas mais fortes de exaustão emocional, e aqueles que dormiam menos nos fins de semana eram mais propensos a relatar sintomas mais fortes de despersonalização. Esses resultados sugerem que a pandemia de COVID-19 pode ter um efeito sobre a qualidade do sono e causar sintomas de burnout nos integrantes do corpo docente do ensino superior no México.

Abstract This paper aims to assess the differences and associations of the effect of COVID-19 on sleep habits, sleep quality, and burnout symptoms among faculty members of higher education in Mexico. This was a cross-sectional study with a total sample of 214 faculty members of higher education from Mexico between May 18th and June 10th of 2020. We applied questionnaires containing sociodemographic and specific questions regarding sleep habits, sleep quality, and burnout symptoms. The results show that during COVID-19 faculty members delayed their bedtime and rise time. No change was found with weekdays time in bed, however, during weekends, time in bed was more than an hour shorter. Social jetlag decreased significantly during COVID-19. Furthermore, during COVID-19, those who reported low sleep quality were more likely to report higher symptoms of emotional exhaustion and those who slept less on weekends were more likely to report higher symptoms of depersonalization. These results suggest that the COVID-19 pandemic may have an effect on sleep and sleep quality and burnout symptoms of faculty members from higher education in Mexico.

ABSTRACT. Meat and meat products are highly perishable as they can provide an appropriate environment for microbial growth due to their high water activity and proper pH level. Quality, safety, sensory and nutritional properties of meat products are highly influenced by pathogenic and spoilage microorganisms. To prevent microbial growth, artificial antimicrobials have been used in food matrices, however safety concerns regarding the use of synthetic preservatives is a challenging issue. Additionally, consumer’s trend towards natural mildly processed products with extended shelf life necessitates the identification of alternative additives originating from natural sources of new acceptable and effective antimicrobials. Although the effectiveness of some natural antimicrobial agents has already been reported, still, there is lack of information regarding the possibility of using lysozyme as a preservative in meat and meat products either alone or in combination with other hurdles. In the present review the applications and beneficial effects of applying lysozyme in meat products, considering its limitations such as allergic problems, interactions with food constituents, reducing sensory changes and toxicity due to high required concentrations to prevent spoilage and oxidation in foods will be discussed.

Abstract One of the main drawbacks of Element Free Galerkin (EFG) method is its dependence on moving least square shape functions which don’t satisfy the Kronecker Delta property, so in this method it’s not possible to apply Dirichlet boundary conditions directly. The aim of the present paper is to discuss different aspects of three widely used methods of applying Dirichlet boundary conditions in EFG method, called Lagrange multipliers, penalty method, and coupling with finite element method. Numerical simulations are presented to compare the results of these methods form the perspective of accuracy, convergence and computational expense. These methods have been implemented in an object oriented programing environment, called INSANE, and the results are presented and compared with the analytical solutions.