The objective of the research was to determine the relationship between the quantity of cattle and methane emissions, in a study period of ten years, allowing to respond to the problem posed regarding the magnitude of CH4 emissions in the province. from Manabi. The study was based on the guides and guidelines issued by the intergovernmental panel on climate change, 2006, using the IPCC 2006 version 2.10 software. The results showed that CH4 emissions are considerably high, 531.68 Gg. CH4, highlighting enteric fermentation emissions, with approximately 50 times more methane than manure management emissions. Likewise, non-dairy cattle are responsible for a higher number of methane emissions compared to dairy cattle, in the case of enteric fermentation, with 287,724Gg. CH4, while for manure management, the highest emissions are generated by dairy cattle, with 7,217 Gg. of CH4. The hypothesi...

The objective of the research was to determine the relationship between the quantity of cattle and methane emissions, in a study period of ten years, allowing to respond to the problem posed regarding the magnitude of CH4 emissions in the province. from Manabi. The study was based on the guides and guidelines issued by the intergovernmental panel on climate change, 2006, using the IPCC 2006 version 2.10 software. The results showed that CH4 emissions are considerably high, 531.68 Gg. CH4, highlighting enteric fermentation emissions, with approximately 50 times more methane than manure management emissions. Likewise, non-dairy cattle are responsible for a higher number of methane emissions compared to dairy cattle, in the case of enteric fermentation, with 287,724Gg. CH4, while for manure management, the highest emissions are generated by dairy cattle, with 7,217 Gg. of CH4. The hypothesi...

La investigación se realizó para evaluar de manera cuantitativa, la relación de las clases sociales de la ciudad de Portoviejo, provincia de Manabí, Ecuador, con las preferencias y limitantes de sus acciones sociales, en relación a factores económicos, de comodidad, de tiempo y de contaminación. Se elaboró un cuestionario estructurado con ocho preguntas, de las cuales las siete primeras responden a acciones sociales ineludibles de una vida cotidiana en cualquier urbe. Y una pregunta que se dirigió en forma de una acción general y libre del compromiso de cualquier acción social que altere o modifique, los anhelos y deseos de las acciones establecidas en las siete preguntas precedentes. Esto permitió demostrar que las preferencias en las acciones sociales, son independientes de las clases sociales, prevaleciendo para ambas el factor económico y la contaminación como la últim...

Water contaminated by heavy metals is a risk to public health. This is the reason behind widespread research on water treatment oriented to removing metal ions. This research determined the intensity of adsorption of lead (Pb) by the Azolla caroliniana fern and its capacity to remove lead in synthetic waters. An atomic absorption spectrophotometer was used to determine the concentration of adsorbed lead. Langmuir isotherm graphs showed that the type of isothermal system was unfavorable for the four reactors used in the study (RL's greater than 1). On the other hand, Freundlich isotherm graphs showed the linear models of the kinetic behavior of lead adsorption by Azolla caroliniana for the four reactors and enabled us to determine that the best R2 and the highest adsorption intensity (n) of Pb (0,122) was achieved with reactor D (30 ppm Pb).

Water contaminated by heavy metals is a risk to public health. This is the reason behind widespread research on water treatment oriented to removing metal ions. This research determined the intensity of adsorption of lead (Pb) by the Azolla caroliniana fern and its capacity to remove lead in synthetic waters. An atomic absorption spectrophotometer was used to determine the concentration of adsorbed lead. Langmuir isotherm graphs showed that the type of isothermal system was unfavorable for the four reactors used in the study (RL's greater than 1). On the other hand, Freundlich isotherm graphs showed the linear models of the kinetic behavior of lead adsorption by Azolla caroliniana for the four reactors and enabled us to determine that the best R2 and the highest adsorption intensity (n) of Pb (0,122) was achieved with reactor D (30 ppm Pb).