Browsing by Autor "Maria Alexandra Romero"

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    Producción de microorganismos probióticos como aditivo para alimentos concentrados para ganado vacuno (primera parte)
    (Universidad de Los Andes, 2004) Edgar Vargas; Clara Juliana Gómez; Móníca Eliana Parra; Maria Alexandra Romero
    Probiotic bacteria have been recognized as an important alternative to antibiotics and other growth factors used in animals, which have a negative influence on animal and consumer’s health. Preliminar experiments were performed in shaker to obtain the media formulation and the growth kinetics for isolated strains of Lactobacillus spp. and Bifidobacterium spp. Experiments on a 2.7 L batch reactor allowed the study of operation parameters as agitation and aeration, obtaining the highest growth using two 6-paddle Rushton turbines and air flow of 1.4 WM. These results were used to scale-up the batch process to a 50.0 L bioreactor, obtaining a geometrically similar design that produces a cell density of 6.5 g/L in 24 hours of operation, with optimum media and operating conditions, broadening the field of application of probiotics to industries not necessarily related to dairy products.
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    Producción de microorganismos probióticos como aditivo para alimentos concentrados para ganado vacuno (segunda parte)
    (Universidad de Los Andes, 2004) Edgar Vargas; Clara Juliana Gómez; Móníca Eliana Parra; Maria Alexandra Romero
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    Production of probiotic microorganisms as an additive to cattle feed concentrates (second part)
    (2004) Edgar Vargas; Clara Juliana Gómez; Móníca Eliana Parra; Maria Alexandra Romero
    For years, industries and research labs have investigated probiotics for nonhuman applications. The use of probiotics as an alternative natural way of enhancing animal performance has shown promising results. Modern farm methods which include rearing conditions and diets induce stress and cause changes in the composition of the microflora, which compromises the animal's resistance to infection. The aim of the probiotic approach is to repair the deficiencies in the microflora and restore the animal's resistance to disease. Improving animal health and performance has always been the goal for farm and livestock producers. For this reason the present study was conducted to develop the microencapsulation of Probiotics (Lactobacillus Thuringenesis and Bifidobacterium Pseudulongum) by the methods of Emulsion and Extrusion, to obtain a daily diet for calves that could offer not only the benefits of a high quality supplement but also the advantages of a product with incorporated probiotics.