Navegando por Autor "COSTA, Maria Elizabeth Gemaque"

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Acesso aberto (Open Access)
Análise clínica da doença periodontal em pacientes diabéticos tipo 2 correlacionada com o nível de hemoglobina glicada e proteína C-reativa
(Universidade Federal do Pará, 2006-05) COSTA, Maria Elizabeth Gemaque; FELÍCIO, João Soares; http://lattes.cnpq.br/8482132737976863; CORRÊA, Adriano Maia; http://lattes.cnpq.br/6062379402457289
Diabetes Mellitus is an endocrine disease that causes a large number of systemic disorders. It has been considered that diabetes may influence the installation and advancing of inflammatory periodontal disease, as seen with the wound healing difficulty, but is also influenced by periodontal disease, since the clinic course of periodontal disease may affect the glucose metabolism and diabetic control. So, the interrelationship between diabetes and periodontal disease has troubled the dental professionals. The aim of this study was to evaluate the clinical condition of periodontium in diabetic individuals type 2 and the necessity of periodontal treatment through Periodontal Screening Records (PSR), in conjunction with laboratorial analysis (HbA1c and high-sensitivity C-reactive protein-CRP). Of the 88 participants of the study, 5,69% had been presented free of disease; 36,36% had been presented with gingivitis and 57,95% had been presented with periodontitis. In the group of the not diabetic individuals, 51.06% had periodontitis, while 65.85% of the diabetic had presented the disease. The periodontal disease was presented more serious in the age group of 60-69 years (group not diabetic) and 70-79 years (group diabetic). All the diabetic had presented periodontal disease, and the score 3 (50,34%) was most prevalent In the group of the not diabetic individuals 89,36% had presented periodontal disease, and the score 2 (31,25%) was most prevalent.Although the high levels of C-reactive protein and the glycosylated hemoglobin, it did not have association with the gravity of the periodontal disease in the participants of the study.
Acesso aberto (Open Access)
Caracterização morfológica, cristalina e textural de bio-adsorventes produzidos via processamento hidrotérmico de resíduos de palha de milho com H2O sub-crítica: Aplicação na adsorção de ácido acético.
(Universidade Federal do Pará, 2021-12-06) COSTA, Maria Elizabeth Gemaque; MACHADO, Nélio Teixeira; http://lattes.cnpq.br/5698208558551065
This work aims to investigate the influence of temperature on the textural, morphological and crystalline characterization of bioabsorbents produced by hydrothermal processing of corn husk residues with hot compressed H2O. The experiments were carried out at 175, 200, 225 and 250 ºC, 240 minutes, heating rate of 2.0 ºC/min and biomass/H2O ratio of 1:10, using a pilot scale reactor of 18,927 L. The process is analyzed in terms of yields of reaction products as a function of temperature. The results showed yields of solids ranging from 62.92 to 35.82% (weight), gas yields ranging from 1.49 to 9.59% (weight) and liquid products ranging from 35.43 to 54.59% ( Weight). The yield of the solid phase decreases with temperature, presenting an inflection region between 200 and 225 °C, in which a drastic change occurs, while that of the liquid phase increases, presenting the same inflection region between 200 and 225 °C. The gas phase yield increases exponentially with temperature up to approximately 10% (weight) in the investigated temperature range. Elemental analysis of solid products shows that the carbon content increases, while the oxygen and hydrogen content decreases with temperature. The textural, morphological and crystalline characterization of solid phase products analyzed by TG/TDG, SEM/EDX, XRD and BET. The solid phase product (bio-adsorbent) obtained by hydrothermal processing of corn husk residues at 225 and 250 °C, 240 minutes, and biomass/H2O ratio of 1:10, were chemically activated with 2.0 NaOH solutions. M and 2.0 M HCl to investigate the adsorption of acetic acid solutions (1.0; 2.0; 3.0; and 4.0 mg/mL). The adsorption kinetics investigated at 30, 60, 120, 240, 480 and 960 seconds. The adsorption isotherm showed that chemically activated carbons were able to remove acetic acid from aqueous solutions.