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- 저자 : Amanda Garcia (검색결과 4 건)
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Physicochemical properties of a calcium aluminate cement containing nanoparticles of zinc oxide
da Rosa Amanda Freitas,Amaral Thuany Schmitz,Paz Dotto Maria Eduarda,Goulart Taynara Santos,Rossetto Hebert Luís,Bortoluzzi Eduardo Antunes,Teixeira Cleonice da Silveira,Garcia Lucas da Fonseca Robert 대한치과보존학회 2023 Restorative Dentistry & Endodontics Vol.48 No.1
Objectives This study evaluated the effect of different nanoparticulated zinc oxide (nano-ZnO) and conventional-ZnO ratios on the physicochemical properties of calcium aluminate cement (CAC). Materials and Methods The conventional-ZnO and nano-ZnO were added to the cement powder in the following proportions: G1 (20% conventional-ZnO), G2 (15% conventional-ZnO + 5% nano-ZnO), G3 (12% conventional-ZnO + 3% nano-ZnO) and G4 (10% conventional-ZnO + 5% nano-ZnO). The radiopacity (Rad), setting time (Set), dimensional change (Dc), solubility (Sol), compressive strength (Cst), and pH were evaluated. The nano-ZnO and CAC containing conventional-ZnO were also assessed using scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. Radiopacity data were analyzed by the 1-way analysis of variance (ANOVA) and Bonferroni tests (p < 0.05). The data of the other properties were analyzed by the ANOVA, Tukey, and Fisher tests (p < 0.05). Results The nano-ZnO and CAC containing conventional-ZnO powders presented particles with few impurities and nanometric and micrometric sizes, respectively. G1 had the highest Rad mean value (p < 0.05). When compared to G1, groups containing nano-ZnO had a significant reduction in the Set (p < 0.05) and lower values of Dc at 24 hours (p < 0.05). The Cst was higher for G4, with a significant difference for the other groups (p < 0.05). The Sol did not present significant differences among groups (p > 0.05). Conclusions The addition of nano-ZnO to CAC improved its dimensional change, setting time, and compressive strength, which may be promising for the clinical performance of this cement.
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Research Development Using REDCap Software
Klauss Kleydmann Sabino Garcia,Amanda Amaral Abrahão 대한의료정보학회 2021 Healthcare Informatics Research Vol.27 No.4
Objectives: High-quality clinical research is dependent on adequate design, methodology, and data collection. The utilizationof electronic data capture (EDC) systems is recommended to optimize research data through proper management. This paper’s objective is to present the procedures of REDCap (Research Electronic Data Capture), which supports researchdevelopment, and to promote the utilization of this software among the scientific community. Methods: REDCap’s web applicationversion 10.4.1 released on 2021 (Vanderbilt University) is an EDC system suitable for clinical research development. This paper describes how to join the REDCap consortium and presents how to develop survey instruments and use them tocollect and analyze data. Results: Since REDCap is a web application that stimulates knowledge-sharing among the scientificcommunity, its development is not finished and it is constantly receiving updates to improve the system. REDCap’s tools provideaccess control, audit trails, and data security to the research team. Conclusions: REDCap is a web application that canfacilitate clinical research development, mainly in health fields, and reduce the costs of conducting research. Its tools allowresearchers to make the best use of EDC components, such as data storage.
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Unilateral Punctate Keratitis Secondary to Wallenberg Syndrome
Pino Cidad,Ana Boto,Almudena Del Hierro,Maria Capote,Susana Noval,Amanda Garcia,Susana Santiago 대한안과학회 2014 Korean Journal of Ophthalmology Vol.28 No.3
We studied three patients who developed left unilateral punctate keratitis after suffering left-sidedWallenberg Syndrome. A complex evolution occurred in two of them. In all cases, neurophysiologicalstudies showed damage in the trigeminal sensory component at the bulbar level. Corneal involvementsecondary to Wallenberg syndrome is a rare cause of unilateral superficial punctate keratitis. The lossof corneal sensitivity caused by trigeminal neuropathy leads to epithelial erosions that are frequentlyunobserved by the patient, resulting in a high risk of corneal-ulcer development with the possibility ofsuperinfection. Neurophysiological studies can help to locate the anatomical level of damage at theophthalmic branch of the trigeminal nerve, confirming the suspected etiology of stroke, and demonstratingthat prior vascular involvement coincides with the location of trigeminal nerve damage. In some of thesepatients, oculofacial pain is a distinctive feature.
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Murilo Henrique Souza Leal,André Ricardo Zeist,Nilson Rodrigues Júnior,André Dutra Silva Júnior,José Henrique Verhalem Arantes,Jair Garcia Neto,Julia Roberta Sanches de Pieri,Amanda Carvalho Perrud 한국작물학회 2021 Journal of crop science and biotechnology Vol.24 No.3
Sweet potato (Ipomoea batatas L.) is a root that allows healthy eating and combats malnutrition. There is a need for more productive sweet potato genotypes displaying good resistance and a favorable appearance and shape. New genotypes that are more productive, resistant to the main soil pests and with good physical characteristics would contribute to meet the needs of producers and the demands of consumers. The aim of this study was to develop and select sweet potato genotypes regarding agronomic and physical root parameters. The new genotypes were obtained through the cross-linking of 22 parents with commercial characteristics. Subsequently, 386 experimental genotypes were conducted in the feld in an experimental design consisting of augmented blocks with intercalated controls. Aspects related to agronomic, physical root characteristics and resistance to Euscepes postfasciatus were explored. Genotypes with higher performance than the controls were identifed for all assessed parameters. The genotypes UZBD-K-09, UZBD-K-56 and UZBD-K-78, with purple fesh roots, UZBD-F-15 and UZBD-F-34, with orange fesh, and UZBD-K-70, with a white fesh were selected.
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