Examinando por Materia "Yuca amarga"
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Publicación Acceso abierto Obtención y caracterización de un material compuesto a base de almidón de yuca amarga (Manihot Esculenta) y endocarpio de coco pulverizado(2019-03-29) García Álvarez, Jonathan; Morales Escobar, Karen Sleth; Espitia Sanjuán, Luis Armando; Franco Peñata, Arlet PatriciaLos plásticos elaborados a partir de polímeros sintéticos han sido ampliamente utilizados como material de embalaje debido a su estabilidad y resistencia, sin embargo generan problemas de contaminación por su largo tiempo de degradación. Esta problemática ha conducido al desarrollo de nuevos materiales a partir de fuentes biodegradables. En el presente trabajo se buscó la obtención de un material compuesto a base de almidón de yuca amarga, endocarpio de coco pulverizado y carboximetilcelulosa (CMC). Se evaluaron y compararon 10 corridas, en las que variaron las concentraciones de almidón de yuca amarga (3 - 4 y 5%), carboximetilcelulosa (0,1 - 0,2 y 0,3%) y endocarpio de coco (0,4 – 0,8 y 1,2%), a través de ensayos de tensión, solubilidad en agua, estabilidad en medio ácido y alcalino y espectroscopia infrarroja por transformada de Fourier (FTIR). En términos generales la corrida 8 presentó mayor resistencia última con 11,39 MPa. La corrida 10 presentó mayor solubilidad en agua y medio alcalino con un 100% de solubilidad. La corrida 15 expuso mayor estabilidad en medio ácido con 74,71 MPa. La caracterización FTIR por mostró que no hubo formación de nuevas uniones. La variación de la concentración de los componentes de las películas no tuvo efecto significativo en ninguna de las propiedades estudiadas.Publicación Acceso abierto Respuestas de la yuca Mtai-8 (Manihot sp.), estimulada con ANA en una localidad del Sinú Medio.(2020-11-14) Martínez González, Daniel José; Marzán Julio, Erika María; Pardo Plaza, Yuri Janio; Muñoz Pretel, CésarThe research was carried out on the MTai-8 variety of bitter or industrial cassava (Manihot sp.) At the field level cultivated in a locality of the middle Sinú of the Colombian Caribbean, with the objective of determining the response of this variety when subjecting propagules yucca to stimuli with different concentrations of the auxin biostimulant ANA applied in pre-planting. The investigation took six months, where destructive samplings were taken every month and, to this, a study of some of the physiotechnical indices was carried out, such as LAR, LAI, NAR, RGR and CGR, in the same way the performance in dry matter was evaluated of the crop. Before planting at field level, the cuttings were immersed for 15 minutes in auxin biostimulant, a product commercially known as Hormonagro® (ANA 17.2g / L). The concentrations of the biostimulant evaluated on the culture were 0 ppm (control in water), 100 ppm and 200 ppm. After this, a completely randomized block trial was set up. The effect of the treatments became visible from 60 DDS when the differentiation in the increase of the biomass of the organs began, showing clear significant differences between the treatments. Regarding the determination of LAR and LAI, the treatment of 100 ppm of auxin biostimulant is postulated as the treatment with the highest exposure of foliar area to radiation. The NAR, RGR, these indices show clear fluctuations which indicates the normal development of the crop for the three treatments; CGR shows that the 100 ppm treatment is the most effective treatment in terms of agronomic productivity. Everything that concerns crop yield during the six months after sowing shows that T2 or stimulating the cassava cuttings in pre-sowing with a concentration of 100 ppm of auxin biostimulant is the best treatment, since it induced the values to be obtained higher in terms of efficiency and production and accumulation of crop biomass. Finally, the application of auxins at 100 ppm to the cuttings of cassava variety MTai-8 in pre-planting, showed that the plants undergo greater differentiation and a better performance was shown in the development of the crop until 6 months of age. In addition to this, the results of this research suggest that the application of exogenous auxins should be continued at the field level, until more specific results are achieved.