A study on the quality of water for human consumption was carried out in Julián, Severino and Balsa en Medio communities located in the micro-basin of the Carrizal River in the province of Manabí, Ecuador. Surface water samples were taken to determine chemical, physical and microbiological properties. To establish the quality of the water in the sampling sites, the ICA NSF water quality index was used, which allows weighing parameters assigning a weight. A completely randomized design with three repetitions was used, taking the localities as treatments. The analysis of variance was carried out through the InfoStat program and the average comparisons through the Tukey test at 5% probability. The physical chemical variables of the locality of Severino showed values that induced lower water quality than those obtained for the localities of Julián and Balsa en Medio, with a similar beh...

Se realizó un estudio sobre la calidad del agua de consumo humano en las comunidades Julián, Severino y Balsa en Medio situadas en la microcuenca del río Carrizal en la provincia de Manabí, Ecuador. Se tomaron muestras de aguas superficiales con fines de determinar propiedades químicas, físicas y microbiológicas. Para establecer la calidad del agua en los lugares de muestreo se empleó el índice de calidad del agua ICA NSF, según el cual permite ponderar parámetros asignándole un peso. Se utilizó un diseño completamente aleatorizado con tres repeticiones, tomando a las localidades como tratamientos. Los análisis de varianza se realizaron a través de programa InfoStat ® y las comparaciones de promedio a través de la prueba de Tukey al 5% de probabilidad. Las variables físico químicas de la localidad de Severino mostraron valores que indujeron de menor calidad de agua qu...

In order to determine the amount of phenols in an oily extract of Origanum vulgare leaves with an agile, accessible, economical and respectful procedure with the living environment, UV visible spectroscopy was used, creating a chromophore with iron III chloride. at 10,000 mg / L in 95% ethanol solution, a wave width of 330 nanometers and as a reference, a standard of 5-Isopropyl-2-methylphenol with a concentration of 997000 mg/L, dissolved successively (99 700 - 110 000 - 120 000 - 130000 - 140000 mg/L). The graphical representation of verification of the known quantities of phenols contained in the solutions and the product of the extraction by vapor drag of the leaves with respect to the absorbance, shows after the statistical analysis of variance by linear adjustment of the least squares, a linearity and precision in the procedure used, achieving concentrations between 120,000 and 140...