The objective of the work carried out is to continue research on the effect of chloride ions on the variables that determine the behavior of concrete as a protective covering for reinforcing steel, when it is subjected to the environmental conditions of the marine coast of the Peruvian coast. Considering the relevance of the water / cement ratio in obtaining the compact properties of concrete and therefore in the ease with which chlorides can diffuse in this medium, we proceeded to prepare aggregates from the region with groundwater and Type I Portland cement, forty-five 75 x 150 mm cylindrical specimens, which after undergoing 1, 3 and 7 days of curing were paraffin-watered on all sides except in a basal plane and then immersed in water tridistilled with sodium chloride of high purity degree, in proportions similar to the salinity conditions of the Pacific Ocean in the Peruvian coast. A...

The objective of the work carried out is to continue research on the effect of chloride ions on the variables that determine the behavior of concrete as a protective covering for reinforcing steel, when it is subjected to the environmental conditions of the marine coast of the Peruvian coast. Considering the relevance of the water / cement ratio in obtaining the compact properties of concrete and therefore in the ease with which chlorides can diffuse in this medium, we proceeded to prepare aggregates from the region with groundwater and Type I Portland cement, forty-five 75 x 150 mm cylindrical specimens, which after undergoing 1, 3 and 7 days of curing were paraffin-watered on all sides except in a basal plane and then immersed in water tridistilled with sodium chloride of high purity degree, in proportions similar to the salinity conditions of the Pacific Ocean in the Peruvian coast. A...

This research paper is aimed at informing the results of a study conducted in 15 veterinarian centers located in Machala, El Oro province, Ecuador; in which physical, chemical, and microbiological properties of solid waste, that might have an impact on the environment and human health were analyzed. Random sampling, as well as systematic sampling was used in order to determine amount, humidity, density, and physical, physicochemical, microbiological composition of waste. The results allowed the researchers to determine the composition of waste generated by these veterinarian centers. Medical waste was found as predominant with 48%. It was also found the percentage of calorific capacity described as high in the majority of the veterinarian centers, as well as the microbiological characteristics, in which a high amount of mesophilic and pseudomona bacteria was established through leachate ...

El objetivo de este artículo es dar a conocer los resultados del estudio realizado en 15 centros veterinarios de Machala, provincia el Oro, Ecuador donde se analizó y caracterizó las propiedades físicas, químicas y microbiológicas de los Residuos Sólidos que pudieran tener impacto medio ambiental y a la salud. Para ello se realizó un muestreo probabilístico aleatorio simple combinado con un muestreo probabilístico sistemático que permitió determinar y analizar la cantidad, humedad, densidad, y composición física, fisicoquímica y microbiológica de los desechos. De los resultados obtenidos, se logró determinar la composición de los residuos generados en los centros de atención veterinaria, siendo predominantes los residuos Biosanitarios con un 48%. Se halló además el porcentaje de la capacidad calorífica de los residuos siendo elevada en la mayoría de los centros, as...

This paper presents the results obtained in a study conducted in the period 2013-2014 to determine the pathological profile of a sample of 200 schoolchildren from two urban-marginal schools in Machala, El Oro province, Ecuador, aged between 4-12 years, exposed to contact with pesticides used in the fumigation of banana crops.Individual characteristics of the children analyzed, such as sex, nutritional status and social stratum, among others, were determined and studies of blood cytometry and plasma cholinesterase were performed.Laboratory tests were not conclusive for the diagnosis of chronic intoxication, which may be related to the type of pesticide used, the time of exposure and the absence of reference values for this age group differentiated by sex.The symptomatology determined in almost all children is related to muscarinic or parasympathetic symptoms that occur in pesticide poison...

En el presente trabajo se presentan los resultados alcanzados en un estudio realizado en el periodo 2013-2014, para determinar el perfil patológico de una muestra de 200 escolares de dos escuelas urbano-marginales de Machala, provincia el Oro, Ecuador, con edades comprendidas entre 4-12 años, expuestos a contacto con pesticidas utilizados en la fumigación de cultivos de banano.Se determinaron características individuales de los niños analizados, como sexo, estado nutricional y estrato social entre otras y se les realizaron estudios de biometría hemática y colinesterasa plasmática. Los análisis de laboratorio no fueron concluyentes para el diagnóstico de intoxicación crónica lo cual pudiera estar relacionado con el tipo de plaguicida utilizado, el tiempo de exposición y a la no existencia de valores de referencia para ese grupo de edad diferenciada por sexo. La sintomatologí...