Differences in total iron content at various altitudes of Amazonian Andes soil in Ecuador

Mendoza, Benito; Guananga, Nelly; Melendez, Jesus R.; Löwy, Daniel A.

doi:10.12688/f1000research.22411.1

Cited by 7 publications

(3 citation statements)

References 15 publications

(14 reference statements)

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“…In addition, it is observed in the intermediate part before the upper limit of the aquifer of the same Figure 2, areas with cultivated grass and crops of short cycle. These areas have as main property the presence of organic matter in the upper part of the soil (Mendoza et al, 2020). Thus, the aforementioned can be said that the nitrates present in the surface layers of the soil in the study area is due to the effect of the nitrogen cycle (Holloway & Dahlgren, 2002).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of nitrate concentrations in groundwater of Llío and San Pablo, Guano – EC

Mendoza

Rojas²,

Castillo³

et al. 2023

F1000Res

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This paper analyzes the groundwater of the Chambo aquifer in the Llío and San Pablo sector, with emphasis on the temporary alternation of nitrate concentration, identifying the anthropogenic activities that may influence this area. This from the cartographic definition of the areas of begging influence the crossing of geological, hydraulic and anthropic activities. The temporality of the geochemical data is 5 years (2016-2020), these results show that water quality meets the requirements of the Ecuadorian national standard, and that the main composition of water is bicarbonated type of calcium-magnesium. Even if the groundwater in this sector meets the standard, variation in nitrate concentration is evident. This type of concentration is presented by the effect of agricultural activities on the surface of the soil, where nitrates occur naturally due to the nitrogen cycle, and that are dragged into the water table by infiltration when the rainy season occurs. In addition, it was found that the type of rock found underground cannot naturally generate nitrates.

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Section: Resultsmentioning

confidence: 99%

Evaluation of nitrate concentrations in groundwater of Llío and San Pablo, Guano – EC

Mendoza

Rojas²,

Castillo³

et al. 2023

F1000Res

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“…Por lo tanto, la bioproducción de etanol 2G, comprende principios de gestión empresarial, y de nuevas prácticas agrícolas integrales que abarquen estudios en la composición de suelos (Mátyás et al,2020;Mendoza, Guananga, Melendez & Lowy, 2020a;Mendoza et al, 2020b;Kincses et al,2020) que permitan mejores eficiencias en la producción de cultivos destinados a la producción de etanol y la promoción de modelos comerciales sostenibles (Lopes et al, 2016;, junto a la disminución de impactos ambientales que pudiera lograrse al reemplazar la producción de energía de origen fósil por biocombustibles alternativos (El Khatib et al, 2018).…”

Section: Introductionunclassified

Gestión para la Producción de biocombustibles 2G: revisión del escenario tecnológico y económico

Melendez

Velasquez-Rivera

Salous³

et al. 2021

RVG

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Actualmente existe un crecimiento mundial en el consumo de energía y son los biocombustibles la alternativa viable para reducir la dependencia de los combustibles fósiles, minimizar el impacto ambiental negativo e incrementar el uso de fuentes de energía alternativas. El etanol ha sido parte de esta solución, y su producción industrial evoluciona según el tratamiento aplicado a la materia prima. La producción de segunda generación (2G) a partir del material lignocelulósico es una alternativa que promete grandes oportunidades y rendimiento del biocombustible. Sin embargo, el tratamiento de la biomasa es costoso al compararlo con los métodos de producción de primera generación (1G). El objetivo se focalizó en describir los avances tecnológicos y el escenario económico que define la gestión empresarial habilitada para la producción del biocombustible de 2G. La metodología se basó en una revisión sistemática de literatura, con nivel descriptivo. Los resultados enfatizaron que la gestión agro-industrial dirigida a la producción de etanol dependerá de consideraciones relacionadas con la disponibilidad de recursos económicos, tecnológicos, de innovación y de su relación con los stakeholders. Se concluye que en las próximas décadas se logre un mayor desarrollo tecnológico a bajo costo. Por ahora la eficiencia en la producción de etanol 2G y las combinaciones de métodos de producción de etanol 1G-2G pudiera significar un elemento clave para complementar la demanda energética de los países que la requieran.

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“…However, although these wastes contain substances with high fiber and protein content, which may be of interest in the food industry, the main destinations are landfills, which represent major environmental problems worldwide, related to the affectation to the water bodies, production of high CO 2 contents, for which the fertility of the soils should be protected as a fundamental objective of sustainable development (Mendoza et al, 2020a). The recovery of this waste has become one of the most critical challenges in the food industry since it not only allows them to be used again as raw material but also allows lower costs and helps reduce environmental impact (Rezzadori et al, 2012) and sometimes the composition of the soil exerted by the presence of available minerals, which allows better crops (Mendoza et al, 2020b).…”

Section: Introductionmentioning

confidence: 99%

Kinetics of drying Bactris gasipaes Kunth sub-products: comparison of mathematical models

et al. 2021

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The industrialization of the heart of palm (palm heart), obtained from the sprout of a palm known as pejibaye, chontaduro, or peach palm (Bactris gasipaes Kunth), generates two main products: the fruit and the heart of the stem. The stem produces a highly perishable residue due to its high humidity, making drying an alternative to increase its useful life. The main objective of this study was to describe which of the selected mathematical models conform to better drying kinetics in samples (by-product) of palm heart (palm heart), according to the selected statistical criteria. Mathematical Modeling of the by-product drying curves (the heart of palm) was performed at two working temperatures (70 and 80 °C) and two groups, one minced and the other ground. The results of the water content were statistically processed to find the most convenient model among those proposed by other researchers. The calculation of the parameters of the different drying models was carried out with the STATISTICA version 8.0 program, using the non-linear estimation tool, according to the quasi-Newton algorithm estimation method. The results show that the models MR = exp(-k.tn) and MR = exp(-(k.t)n), called Page and modified Page respectively, were the best fit to the experimental data in all cases. Therefore, the models named Page and modified Page best fit the innovative information and the most suitable model.

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Differences in total iron content at various altitudes of Amazonian Andes soil in Ecuador

Cited by 7 publications

References 15 publications

Evaluation of nitrate concentrations in groundwater of Llío and San Pablo, Guano – EC

Evaluation of nitrate concentrations in groundwater of Llío and San Pablo, Guano – EC

Gestión para la Producción de biocombustibles 2G: revisión del escenario tecnológico y económico

Kinetics of drying Bactris gasipaes Kunth sub-products: comparison of mathematical models

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