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Ítem Caracterización fisicoquímica de la sal sódica y potásica del poli (ácido-maléico-atl-octadeceno) con diferentes porcentajes de ionización en medio acuoso.(Universidad Icesi, 2017-01-01) Palacio Ramírez, Maria Del Mar; Salamanca Mejía, Constain Hugo; Asesor TesisEn este proyecto se realizó la caracterización fisicoquímica de la sal sódica y potásica del poli(ácido-maléico-alt-octadeceno) con diferentes grados de ionización en medio acuoso. Inicialmente, se evaluó el efecto de la concentración sobre la turbidez generada en los sistemas acuosos a partir de ensayos de transmitancia y con esto, se definió una concentración óptima de trabajo de 1 mg/mL. Posteriormente, se evaluó el efecto del tiempo sobre diversas variables fisicoquímicas, tales como el pH y la conductividad mediante estudios potenciométricos, además del potencial Z, el tamaño de partícula y la polidispersidad de tamaño por medio de estudios de dispersión de luz dinámica. Los resultados muestran que con el paso del tiempo, los sistemas tienden a disminuir el pH y el potencial Z, mientras que el tamaño de partícula y la polidispersidad de tamaño aumentan, sugiriendo que el estado termodinámico de dichos sistemas tiende a la agregación interpolimérica.Ítem Caracterización de las dispersiones acuosas homogéneas de hidroxipropilmetil celulosa rh y alginato de sodio, empleadas como aglutinantes en la fabricación de productos farmacéuticos granulados de uso veterinario.(Universidad Icesi, 2014-01-01) Torres España, Katherine; Mora Guerrero, Carolina del Pilar; Asesor TesisThis document represent a research to the aqueous dispersions of two binders at different concentrations, Hydroxypropylmethyl Cellulose RH (3 %, 4 %, 5 %, 6 % and 7 % w/v) and Sodium alginate (0.5 %, 1 %, 2 % , 3 % and 4 % w/v), in these were determinated physicochemical characteristics as pH, density (specific weight) and viscosity, which were reported in their respective datasheets. As well also, establish the performance characteristics of the granulation, through fluidization technique for three of the five concentrations studied of the aqueous dispersions of each material. The functionality characteristics or performance about the proposed use as binders corresponded to granulometric measurements and the fluidity; this determinations were made to the product obtained of granulation process of a diluent commonly used, Lactose monohydrate alimentary-grade, with each of the selected binder dispersions in a granulator of fluid bed. Actually, the Pharmaceutical Laboratory Carval Colombia, company dedicated to the production and marketing of veterinary pharmaceuticals, is interested in the development and production of dosage forms types granulated, which bring on the uniform distribution of the product in the mixing of products where they are incorporated, ensuring correct dosing of the product, since this prevent the segregation of the active ingredient, improve the homogeneity of the mixing process, and allow to obtain a product with good flow and a lower percentage of fine dusts. All this proof the need of have useful information about the possible use of different excipients in a pharmaceutical shape of granulate type, remain central the binders.Ítem Estudio termodinámico del fenómeno de asociación entre el polímero clorhidrato de eudragit® e-100 y el sustrato 5hdibenz [b,f] azepine-5-carboxamide en medio acuoso, utilizando el modelo de pseudo-fases poliméricas(Universidad Icesi, 2015-05-21) Cadena Herrera, Daniela; Salamanca Mejía, Constain Hugo; Asesor TesisThis work is part of a research project of high amplitude, which has focused on the characterization of the physicochemical properties of amphiphilic polymer systems in aqueous solution, in order to evaluate their potential application as novel matrix systems capable of establishing specific interactions with apolar substrates and thus be able to contribute to the improvement of the physicochemical characteristics of these. Specifically, in this study, the degree of association occurred between the polymeric material hydrochloride Eudragit ® E- 100 and the substrate apolar 5H - dibenz [ b , f ] azepine -5 -carboxamide was evaluated , using the ultrafiltration technique and the pseudo-polymeric phases model. This technique involves a process of normal filtration , where cut-off membrane allows exclusive pass of the solvent and the substrate is not retained by the polymer system , the experimental parameter of measurement can be expressed in terms of percent retention ( % R ) , from a relationship between amount of added substrate and amount of ultrafiltrate substrate. For this, an ultrafiltration cell fitted with a cellulose membrane with a pore size of 30,000 Daltons, through which the passage of solvent and substrate held with the application of 45 psi pressure , in the presence of forced continuous stirring is used.