DSpace Communidade:
http://repositorio.ufgd.edu.br/jspui/handle/prefix/51
2023-12-05T17:50:42ZAtributos químicos e físicos de solos de referência e sua relação com a fragilidade ambiental na bacia hidrográfica do Rio Ivinhema - MS
http://repositorio.ufgd.edu.br/jspui/handle/prefix/5789
Título: Atributos químicos e físicos de solos de referência e sua relação com a fragilidade ambiental na bacia hidrográfica do Rio Ivinhema - MS
Autor(es): Cassol, Cleidimar João
Primeiro Orientador: Arruda, Eduardo José de
Abstract: The advance of the agricultural frontier is growing in the Cerrado Biome, motivated by the production of meat and grains for export. Deforestation causes environmental concern, and in some regions of the Cerrado Biome they have already exceeded the limits for conversion of land use, and should be considered priority areas for carrying out environmental studies and monitoring. In this sense, aimed of this research was to evaluate chemical and physical attributes of reference soils and their relationship with environmental fragility in the Ivinhema River Basin, Mato Grosso do Sul. For this purpose, 62 soil samples were defined, representative of the geological and pedological units of the basin, in remnants of native vegetation. Deformed and undisturbed samples were collected to determine chemical and physical attributes in the laboratory. The results showed a great variety of soils inside the basin, whose natural fertility was high for the Leptsol, Regosol, and Nitisol soils, and low for the Argiluvic Plinthosol, Petroplinthic Plinthosol, and Planosol soils. The texture of the analyzed soils ranged from sandy to clayey, with particle size heterogeneity even within the same textural class. The predominance of medium sand and fine sand and, to a lesser extent, very fine sand, enables high particle adjustment capacity. Sandy soils associated with sandstone formations confer greater fragility to the environment when compared to basaltic clayey soils under similar environmental conditions. The fragility analysis showed that about 17,977 km2 or 47.7% of the area is composed of low potential fragility, associated with clayey soils and low slope (0 - 3%). The anthropic factor favors the increase of environmental fragility in the studied area, because, with the insertion of land use and land cover, high environmental fragility stood out in 16,795 km2 or 44.6% of the basin, especially with agriculture as the largest coverage found in the bowl. The data shown in research can fill the gaps of knowledge and/or for adapting conservation practices of agricultural soils that are more susceptible to erosive processes, as well as for environmental control and monitoring bodies and/or studies of area recovery and maintenance of soil fertility.
Editor: Universidade Federal da Grande Dourados
Tipo: Tese2022-02-07T00:00:00ZAvaliação temporal e espacial da qualidade da água do córrego Jaguapirú do município de Dourados - MS
http://repositorio.ufgd.edu.br/jspui/handle/prefix/5788
Título: Avaliação temporal e espacial da qualidade da água do córrego Jaguapirú do município de Dourados - MS
Autor(es): Gonçalves, Lucimeire Barros
Primeiro Orientador: Ramires, Ivan
Abstract: Even though Brazil is a country that has abundant water resources, it is not free from the threat of a water crisis, as the availability of fresh water varies greatly from one region to another, and furthermore, the country's drinking water reserves are decreasing, and environmental studies and monitoring are extremely important for controlling and evaluating the quality of natural resources. The objective of this research was to evaluate the water quality of the Jaguapirú stream in the Municipality of Dourados-MS according to physical chemical aspects on a spatial temporal scale. The study was carried out from November 2018 to October 2019, being conducted in selected stages based on the seasonal cycles (drought and rain) of the region. The variables analyzed comprised the physicochemical parameters: dissolved oxygen, total acidity, total alkalinity, hardness, chlorides, turbidity, total solids, consumed oxygen (organic matter). The data collection shows that there may be releases of domestic effluents or sources of pollution, although the changes in the results are small. Therefore, it is important to carry out collections at other points between the source and the mouth, in order to evaluate the real effect of this source of pollution, as well as trying to locate the points where inadequate disposal occurs. The Jaguapirú stream presents a relatively satisfactory quality when compared to the established limits, presenting values above expected only for dissolved oxygen and turbidity. The effect of seasonality is significant, modifying the values from the rainy period to the dry period, however it is ideal to carry out quantitative analyzes in order to validate the results obtained.
Editor: Universidade Federal da Grande Dourados
Tipo: Dissertação2020-09-28T00:00:00ZAnálise térmica dos complexos de lantânio e gadolínio com aceclofenaco sob condição não isotérmica: Com a determinação da energia de ativação por termogravimetria
http://repositorio.ufgd.edu.br/jspui/handle/prefix/5731
Título: Análise térmica dos complexos de lantânio e gadolínio com aceclofenaco sob condição não isotérmica: Com a determinação da energia de ativação por termogravimetria
Autor(es): Mendoza, Laís da Silva
Primeiro Orientador: Colman, Tiago André Denck
Abstract: The complexation of lanthanide metals with a class of drugs, the non-steroidal antiinflammatory drugs, may present promising drugs with great carcinogenic and bacterial biological activity. With the need to better understand the physical and chemical interactions of these new complexes, the objective of this work is to characterize two compounds of lanthanum and gadolinium with aceclofenac using Thermal Analysis by TGDSC curves and kinetic analysis of the compounds applying thermogravimetry. To carry out a bibliographic survey of recent articles that studied the kinetics of solid state reactions applying thermal analysis. The results obtained determined that the lanthanum compound is the least stable compared to the gadolinium compound, it also has a lower activation energy and a lower linearity. The gadolinium compound, in addition to having a higher activation energy, also has higher linearity, that is, the static model applied to the compounds was r2= 0.94 for the lanthanum compound and r2= 0.98 for the gadolinium compound. gadolinium, thus, the results of the characterization and the kinetic study performed were considered satisfactory.; La complejación de metales lantánidos con una clase de fármacos, los antiinflamatorios no esteroideos, puede presentar fármacos prometedores con alta actividad biológica cancerígena y bacteriana. Con la necesidad de comprender mejor las interacciones físico-químicas de estos nuevos complejos, el objetivo de este trabajo es caracterizar dos compuestos de lantano y gadolinio con aceclofenaco mediante análisis térmico por curvas TG-DSC y el análisis cinético de los compuestos aplicando termogravimetría. Realizar un levantamiento bibliográfico de artículos recientes que hayan estudiado la cinética de reacciones en estado sólido aplicando análisis térmico. Los resultados obtenidos determinaron que el compuesto de lantano es el menos estable en comparación con el compuesto de gadolinio, además tiene una menor energía de activación y una menor linealidad. El compuesto de gadolinio además de tener mayor energía de activación también presenta mayor linealidad, es decir, el modelo estático aplicado a los compuestos fue r2= 0.95 para el compuesto de lantano y r2= 0.98 para el compuesto de gadolinio, por lo tanto, los resultados de la caracterización y el estudio cinético realizado se consideraron satisfactorias.
Editor: Universidade Federal da Grande Dourados
Tipo: Dissertação2022-09-03T00:00:00ZAvaliação da formação de biofilme por Pseudomonas aeruginosa em sondas vesicais
http://repositorio.ufgd.edu.br/jspui/handle/prefix/5706
Título: Avaliação da formação de biofilme por Pseudomonas aeruginosa em sondas vesicais
Autor(es): Santos, Elane Galvão dos
Primeiro Orientador: Brabes, Kelly Cristina da Silva
Abstract: Biofilms are heterogeneous structures of a widespread nature composed of bacterial cells presenting in a tangled form in a matrix of organic polymers being these adhered to a surface. They can be beneficial, as well as those used in the food industries, in the treatment of influential drinking water and in the production of fermented products. However, biofilm can have a negative impact, especially when formed in medical devices, such as bladder tubes. The formation and adhesion of the biofilm is a bacterial survival strategy, with that the cells are under the protection of the biofilm, with tolerance and resistance to antibiotics, increasing and making even more difficult the clinical treatments of bacterial infections. Pseudomonas aeruginosa is one of the main responsible for nosocomial infections, being intrinsically resistant to some antibiotics, obtaining greater clinical and epidemiological importance. When this microorganism is in conditions of stress, there is a change in its growth mode, causing the formation of biofilms and providing the bacteria with adaptive mechanisms. The present study aims to evaluate the adhesion and formation of biofilm in bladder probes with the multiresistant bacteria Pseudomonas aeruginosa and ATCC 27853 taken from the laboratory of the University Hospital. The surface used for the analysis of adhesion and biofilm formation were the bladder probes made of siliconized latex, identified as “test coupons”, which were cut to a size of approximately 1 cm2. The bacteria were adhered to the test coupons after 24 hours of growth in Brain Heart Infusion (BHI) broth. The evaluation of the biofilm development was carried out in twelve contact times, these times being 0, 1h, 2h, 3h, 5h, 9h, 22h, 34h, 54h, 70h, 127h and 262h (12 days). In the analysis of antibiogram, there was a more effective inhibitory action of antibiotics imipenem and meropenem in dilutions of 10-20, with a halo around 35 mm in diameter. The bacteria used were isolated from Pseudomonas aeruginosa and ATCC 27853 from the hospital. The bacteria showed similar dynamics in the development of the biofilm causing the adhesion of planktonic cells, with little difference in the cycle of bacterial biofilm between the two species at the analyzed times.; Los biofilms son estructuras heterogéneas de naturaleza muy extendida compuestas por células bacterianas que se encuentran enredadas en una matriz de polímeros orgánicos que se encuentran adheridos a una superficie. Pueden ser beneficiosos, al igual que los utilizados en la industria alimentaria, en el tratamiento de afluentes de agua potable y en la elaboración de productos fermentados. Sin embargo, la biopelícula puede tener un impacto negativo, especialmente cuando se forma en dispositivos médicos como sondas vesicales. La formación y adhesión del biofilm es una estrategia de supervivencia bacteriana, con esto las células quedan bajo la protección del biofilm, con tolerancia y resistencia a los antibióticos, aumentando y dificultando aún más los tratamientos clínicos de las infecciones bacterianas. Pseudomonas aeruginosa es una de las principales responsables de que las infecciones nosocomiales sean intrínsecamente resistentes a algunos antibióticos, adquiriendo mayor importancia clínica y epidemiológica. Cuando este microorganismo se encuentra en condiciones de estrés, se produce un cambio en su modo de crecimiento, provocando la formación de biopelículas y dotando a la bacteria de mecanismos de adaptación. El presente estudio tiene como objetivo evaluar la adhesión y formación de biofilm en sondas vesicales con las bacterias multirresistentes Pseudomonas aeruginosa y ATCC 27853 tomadas del laboratorio del Hospital Universitario. La superficie utilizada para el análisis de adhesión y formación de biopelículas fueron las sondas vesicales de látex siliconado, identificadas como “cupones” de prueba, las cuales fueron cortadas a un tamaño aproximado de 1 cm2. Las bacterias se adhirieron a los cupones de prueba después de 24 horas de crecimiento en caldo Brain Heart Infusion (BHI). La evaluación del desarrollo del biofilm se realizó a doce tiempos de contacto, siendo estos tiempos 0, 1h, 2h, 3h, 5h, 9h, 22h, 34h, 54h, 70h, 127h y 262h (12 días). En el análisis del antibiograma se observó una acción inhibidora más eficaz de los antibióticos imipenem y meropenem a diluciones de 10-20, con un halo de alrededor de 35 mm de diámetro. Las bacterias utilizadas fueron aisladas de Pseudomonas aeruginosa y ATCC 27853 de un ambiente hospitalario. Las bacterias presentaron dinámicas similares en el desarrollo del biofilm, provocando la adhesión de células planctónicas, con una pequeña diferencia en el ciclo del biofilm bacteriano entre las dos especies en los tiempos analizados.
Editor: Universidade Federal da Grande Dourados
Tipo: Dissertação2020-11-03T00:00:00Z