Monografias, Dissertações e Teses
URI permanente desta comunidadehttps://repositorioacademico.universidadebrasil.edu.br/handle/123456789/1
Navegar
4 resultados
Resultados da Pesquisa
Item Avaliação da permeação e do efeito protetor UV de produtos capilares por Espectroscopia Raman Confocal(Universidade Brasil, 2022) Vazarin, Adaléia Regina Pontes Sant’ana; Martin, Airton Abrahão; Fávero, Priscila PereiraThe hair fiber suffers a lot of structural changes due to the chemical products exposition and the solar radiation, being the ultraviolet radiation (UV) the principal. The goal of this thesis is analyzed the photo protection and maintenance of the aminoacids concentrations in the hair fibers after the A and B compound suffer UV radiation, using the Raman Confocal electroscopy to measure. The Raman Confocal electroscopy inquires the biochemical and structural alterations of the fiber before and after the solar radiation exposition. In the project, the Raman River Diagnostics system was used the laser with 785 nm excitation and 21 mW of potency. The Raman range measured was between 400 - 1800 cm-1, besides that, the hair fiber was setted up in a 40x objective lens under a quartz window. 15 hair fibers for sample group were analyzed and 21 spectrums per fiber was collected, containing spectrum in the 1575 cm-1 zone. The homogeneity analysis of the virgin hair sample allowed the permeance evaluation in the samples irradiated and no irradiated with UV radiation. In the end, the compound A was more efficiency than the compound B. The efficiency variance of the samples due to the irradiation or the intrinsic features was possible to analysis too. The conclusion of the compound A and compound B analysis was necessary to describe the spectral alterations because of the UV radiation damages and the Raman Confocal electroscopy contributes in the comparation of the products A and products B efficiency.Item Tolerância à radiação UV-B do fungo entomopatogênico Metarhizium Rileyi para o desenvolvimento com o agente microbiano para o manejo das principais espécies lepidópteras nas culturas de soja e algodão(Universidade Brasil, 2022) Andrade, Eliezer Pereira de; Rangel, Drauzio Eduardo NarettoSoybean, corn and cotton crops are afflicted by several noctuid pests, therefore, the development of bioinsecticides can provide the control of these pests with the sustainability of the system. The fungus Metarhizium rileyi has the greatest potential since its epizootics decimate caterpillar populations in the absence of fungicide applications. The low survival of insect-pathogenic fungi when used for insect control in agriculture, however, is mainly due to the deleterious effects of ultraviolet radiation and heat from solar irradiation. In this study, fourteen isolates of M. rileyi were studied and compared with isolates ARSEF 324 and ARSEF 2575 of Metarhizium acridum and Metarhizium robertsii respectively, which sensitivity to UV-B radiation had been previously studied. Conidial suspensions were exposed at room temperature (ca. 26 °C) to 847.90 mWm2 of Quaite-weighted UV-B using two fluorescent lamps TL 20W12 RS (Philips, Eindhoven, Holland). The plates containing the conidial suspensions were irradiated for 1, 2, and 3 h, providing doses of 3.05, 6.10, 9.16, and 12.21 kJ m2 , respectively. Remarkable variability in conidial UV-B tolerance was found among 14 isolates of M. rileyi. Isolate CNPSo-Mr 150 was the most tolerant isolate (germination above 80% after 2 h exposure), which was comparable to ARSEF 324 (germination above 90% after 2 h exposure), the most tolerant Metarhizium isolate. The least tolerant isolate was CNPSo-Mr 597 (germination below 5% after 2 h exposure). Nine isolates were similar with ARSEF 2575 (germination above 50% after 2 h exposure). Concluding, the majority of M. rileyi isolates can endure 1 or 2 h of UV B radiation exposure. However, after 3 h exposure caused great reduction of germination below 40% for all isolates, except for CNPSo-Mr 150 and ARSEF 324.Item Avaliação dos efeitos da desinfecção química e com radiação ultravioleta na estabilidade dimensional de diferentes materiais de moldagem odontológicos(Universidade Brasil, 2021) Santos Neto, Antonio Vinicios dos; Navarro, Ricardo ScarparoThe disinfection of molds obtained with dental impression materials is within the biosafety protocols, in the control of cross-infection of microorganisms in dental offices, prosthesis laboratories, professionals and patients, being currently the target of greater attention due to the pandemic of COVID-19, with the implementation of alternative disinfection protocols and methods. The purpose of this study was to compare the effects of disinfection by ultraviolet radiation and chemical disinfection on dimensional stability of different dental molding materials. Acrylic resin mannequin molds with irreversible hydrocolloidal materials (alginate) (n = 25) and elastomer (condensation silicone) (n = 25) were used with different disinfection methods (n = 5): G1- negative control: no treatment, G2- Glutaraldehyde 2% (10 min), G3- Sodium hypochlorite 1% (10 min), G4- UV-C radiation (λ = 254 nm) (30 s), G5- Autoclave (positive control) (15 min). The molds after the treatments were cast with special plaster. After 24 h, the plaster models were measured by a calibrated, blinded researcher, with a caliper in determined places on the upper first molar: mesio-distal (MD-O) and vestibulo-lingual (VL-O) and buccal cervical-occlusal face (CV-B) and mesio-distal (MD-V). The data were tabulated and analyzed using the statistical tests of Kolmogorov-Smirnov, ANOVA one-way and Tukey tests (p <0.05). There were no statistically significant differences in the linear values of plaster models between chemical (Glutaraldehyde 2%, sodium hypochlorite 1%) and physical (UV-C radiation) disinfection methods with the control (p> 0.05), the autoclave showed a significant difference in relation to the control and the different methods of disinfection (p <0.05) with greater dimensional change for both impression materials. It can be concluded that the methods of chemical disinfection (Glutaraldehyde 2%, Sodium hypochlorite 1%) and physical (UV-C radiation) maintained the dimensional stability of the dental impression materials alginate and elastomer (condensation silicone).Item Carcinoma de células escamosas em felino tratado com eletroquimioterapia: revisão de literatura e relato de caso(Universidade Brasil, 2018) Generoso, Giovanna Cristina Bonichelli; Jark, Paulo César