Manual de laboratorio de química orgánica I

1 archivo PDF (56 páginas)El manual de química orgánica 1, tiene como objetivo servir como guía para el curso del mismo nombre, éste abarca temas que no son contemplados en el curso teórico pero que complementan el estudio de los compuestos orgánicos. Al inicio del manual se describe en forma breve el uso y cuidado del equipo que se usará durante el curso, así mismo al inicio de cada práctica se presenta un cuestionario que deberá ser elaborado antes de realizar la práctica, esto con el fin de que el alumno se familiarice con los conceptos que le serán de gran utilidad para la comprensión de los experimentos

Teachers’ perception of digital technology in teaching and research. Case: professors-researchers UAM-A, Mexico, attached to chemistry

Este trabajo presenta la percepción del profesor-investigador de la UAM-A sobre la Tecnología Digital TD en la docencia teórica, experimental y la investigación, en el área de la química, con un estudio descriptivo-cuantitativo de caso. Los datos adquiridos de un cuestionario-encuesta, se analizan mediante la estadística descriptiva. Los resultados indican que la investigación es favorecida en el uso de la TD y la menos favorecida es la docencia experimental. La infraestructura tecnológica y las políticas son reconocidas en la investigación y en la docencia teórica. Con base en el análisis se establece la Teoría del Bienestar Financiero.This paper studies UAM-A professor-researcher’s perceptions about Digital Technology in theoretical, experimental teaching and research, in chemistry. With a descriptive – quantitative case study. The data acquired from a questionnaire-survey analyzed using descriptive statistics. The results indicate that research is favored in the use of TD and the least favored is experimental teaching. Technological infrastructure and policies are recognized in research and theoretical teaching. Based on the analysis, the Financial Well-Being Theory is established

The risk of COVID-19 death is much greater and age dependent with type I IFN autoantibodies

International audienceSignificance There is growing evidence that preexisting autoantibodies neutralizing type I interferons (IFNs) are strong determinants of life-threatening COVID-19 pneumonia. It is important to estimate their quantitative impact on COVID-19 mortality upon SARS-CoV-2 infection, by age and sex, as both the prevalence of these autoantibodies and the risk of COVID-19 death increase with age and are higher in men. Using an unvaccinated sample of 1,261 deceased patients and 34,159 individuals from the general population, we found that autoantibodies against type I IFNs strongly increased the SARS-CoV-2 infection fatality rate at all ages, in both men and women. Autoantibodies against type I IFNs are strong and common predictors of life-threatening COVID-19. Testing for these autoantibodies should be considered in the general population

The risk of COVID-19 death is much greater and age dependent with type I IFN autoantibodies

International audienceSignificance There is growing evidence that preexisting autoantibodies neutralizing type I interferons (IFNs) are strong determinants of life-threatening COVID-19 pneumonia. It is important to estimate their quantitative impact on COVID-19 mortality upon SARS-CoV-2 infection, by age and sex, as both the prevalence of these autoantibodies and the risk of COVID-19 death increase with age and are higher in men. Using an unvaccinated sample of 1,261 deceased patients and 34,159 individuals from the general population, we found that autoantibodies against type I IFNs strongly increased the SARS-CoV-2 infection fatality rate at all ages, in both men and women. Autoantibodies against type I IFNs are strong and common predictors of life-threatening COVID-19. Testing for these autoantibodies should be considered in the general population

Diminishing benefits of urban living for children and adolescents’ growth and development

Optimal growth and development in childhood and adolescence is crucial for lifelong health and well-being1–6. Here we used data from 2,325 population-based studies, with measurements of height and weight from 71 million participants, to report the height and body-mass index (BMI) of children and adolescents aged 5–19 years on the basis of rural and urban place of residence in 200 countries and territories from 1990 to 2020. In 1990, children and adolescents residing in cities were taller than their rural counterparts in all but a few high-income countries. By 2020, the urban height advantage became smaller in most countries, and in many high-income western countries it reversed into a small urban-based disadvantage. The exception was for boys in most countries in sub-Saharan Africa and in some countries in Oceania, south Asia and the region of central Asia, Middle East and north Africa. In these countries, successive cohorts of boys from rural places either did not gain height or possibly became shorter, and hence fell further behind their urban peers. The difference between the age-standardized mean BMI of children in urban and rural areas was <1.1 kg m–2 in the vast majority of countries. Within this small range, BMI increased slightly more in cities than in rural areas, except in south Asia, sub-Saharan Africa and some countries in central and eastern Europe. Our results show that in much of the world, the growth and developmental advantages of living in cities have diminished in the twenty-first century, whereas in much of sub-Saharan Africa they have amplified