RESUMO
The sugar cane industry has seen how biomass production in sugar mills would be converted to a readily available source of molecules besides sugar. Properly managed, byproducts would be transformed into a sustainable source of renewable and environmentally friendly chemical products. As a principal and more abundant organic acid in sugar cane juice, trans-aconitic acid (TAA) has been studied for use as a plasticizer in the polymer industry. However, up to now no industrial-scale application has been reported. As a reasonable approach to recover TAA from a sugar mill, first, an analytical method to determine its presence in all stages of the sugar-manufacturing process is needed. A new modern method was developed to measure TAA in seven stages in a sugar mill located in Valle del Cauca, Colombia. The stages with higher content of TAA were syrup, with 3363.6 ± 589.3 mg/L, and honey (molasses), with 6110.05 ± 139.5 mg/L.
Assuntos
Ácido Aconítico/química , Manipulação de Alimentos/métodos , Saccharum/química , IsomerismoRESUMO
En el presente trabajo hemos efectuado un análisis esterológico de los cambios ultraestructurales producidos en forma aguda por la administración de una dosis máxima de dihidroergotamina (Dihydroergot, Sandoz), en hígado prefundido de rata. Se utilizaron los parámetros morfométricos de Weibel tales como densidad de volumen, densidad númerica y densidad de superfície. En el grupo experimental se observaron cambios muy significativos de la densidad de superfície mitocondrial, con disminución en la matriz mitocondrial comprobada por la disminución de la densidad de volumen, mientras que la densidad numérica no varió. Los resultados morfométricos indican cambios mitocondriales a nivel de la membrana externa, las crestas y la matriz