Biomass-derived chemical substitutes for bisphenol A: recent advancements in catalytic synthesis

Rigid diols catalytically produced from biomass derivatives have been proposed as bisphenol A functional replacements

Condición nutricional en la puna argentina

The purpose of the present study is to assess the nutritional status of two populations of the Argentinean Puna that hold different socioeconomic conditions: Susques (Jujuy province) and Antofagasta de la Sierra (Catamarca province). The sample consisted of 491 children aged 5 to 18 years old. It was measured weight, height and body mass index (BMI). The weight/age, height/age and BMI/age indexes were estimated and compared with the Frisancho´s (1990) and Cole´s et al. (2000) standard growth tables. Most of the subjects fell below the 50th percentile. The results of the direct anthropometric measurement showed high frequencies of underweight and stunting amongst both populations. Lower percentages of underweight and stunting were obtained when comparing the BMI. Boys and girls of Susques have a better nutritional condition than those from Antofagasta. These results could be explained for disparities in the socioeconomic conditions of both communities.El objetivo de este trabajo es evaluar la condición nutricional en dos poblaciones de la Puna argentina: Susques (provincia de Jujuy) y Antofagasta de la Sierra (provincia de Catamarca). Se analizaron 491 individuos entre 5 y 18 años de edad. Se obtuvieron el peso, la talla y el índice de masa corporal (IMC) y se calcularon los indicadores peso/edad, talla/edad e IMC/edad en relación a los estándares de Frisancho (1990) y Cole et al. (2000). La mayor parte de la población se encuentra concentrada por debajo del percentil 50. Los resultados muestran porcentajes relativamente altos de desnutrición aguda y crónica en función de las medidas directas, y más bajos al comparar el IMC. Los chicos y chicas de Susques muestran una situación nutricional algo mejor que Antofagasta, lo que se interpreta como consecuencia de mejores condiciones socioeconómicas

Continuous-flow processes for the catalytic partial hydrogenation reaction of alkynes

The catalytic partial hydrogenation of substituted alkynes to alkenes is a process of high importance in the manufacture of several market chemicals. The present paper shortly reviews the heterogeneous catalytic systems engineered for this reaction under continuous flow and in the liquid phase. The main contributions appeared in the literature from 1997 up to August 2016 are discussed in terms of reactor design. A comparison with batch and industrial processes is provided whenever possible