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Tipo de material : masterThesis
Título : Evaluación de la incidencia de aflatoxinas en maíz duro (zea mays) de las principales provincias productoras del Ecuador
Autor : Castro Demera, Dicke Alejandro
Tutor : Palacios Cabrera, Héctor Abel
Palabras clave : INDUSTRIA AGRÍCOLA;INDUSTRIA ALIMENTICIA;BIOTECNOLOGÍA MICROBIANA;ANÁLISIS COMPARATIVO;ECUADOR
Fecha de publicación : 2020
Editorial : Quito: Universidad de las Américas, 2020
Citación : Castro, D. (2020). Evaluación de la incidencia de aflatoxinas en maíz duro (zea mays) de las principales provincias productoras del Ecuador (Tesis de maestría). Universidad de las Américas, Quito.
Resumen : El maíz duro es un producto agrícola de gran impacto en la economía nacional, figurando como la principal materia prima en la manufactura de alimentos balanceados para animales…
Descripción : Corn variety ¨hard¨ is an agricultural product with great impact on the national economy, appearing as the main raw material in the manufacture of balanced animal feed. These crops are exposed to factors such as pests and diseases. Certain management practices and factors such as humidity or water activity favor the colonization of the external part of the grains by some fungal genera, which when multiplied synthesize a metabolite known as mycotoxin, which when ingested are toxic to animals and people. Aflatoxins are a type of mycotoxin most frequently associated with hard corn crops, characterized by producing teratogenic, mutagenic, carcinogenic and immunosuppressive effects. For this reason, the objective of this study was to evaluate the presence of aflatoxins in hard corn grains collected in the provinces with the highest production of this crop nationwide. For its execution, the aflatoxins present in the hard corn samples were quantified by HPLC and the fungal genera were characterized using microbiological isolation techniques. The aflatoxin quantification analysis showed the prevalence of AFB1 with 27.32 percent. The microbiological analysis allowed isolating some fungal genera in 100 percent of the samples, among which the aflatoxin-producing Aspergillus and Fusarium stood out. These analyzes evidenced a correlation between post-harvest (drying) processes, humidity, water activity with the proliferation of fungi and subsequent synthesis of aflatoxins in corn kernels.
URI : http://dspace.udla.edu.ec/handle/33000/12780
Aparece en las colecciones: Maestría en Agroindustria con Mención en Calidad y Seguridad Alimentaria

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