Monografias, Dissertações e Teses
URI permanente desta comunidadehttps://repositorioacademico.universidadebrasil.edu.br/handle/123456789/1
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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 Análise da permeação de óleos em cabelo humano utilizando Espectroscopia Raman confocal.(Universidade Brasil, 2024) Grassi, Liliane Trivellato; Martin, Airton AbrahãoWith the different forms of hair treatments that exist today, hair suffers a lot of damage from physical and chemical procedures. So the challenge is to find oils that better permeate the hair fiber up to the inner layer, allowing protection against the aggressions promoted, as natural lipids have a protective function. Copaiba oil is a mixture of light and heavy terpenes and medium-chain fatty acids, which acts as a shine-giving agent and hair recovery agent. Andiroba oil is composed of triglycerides and saturated, monounsaturated and unsaturated fatty acids and coconut oil is composed of saturated fatty acids, giving it great potential to penetrate the hair fiber. The Raman spectroscopy technique allows identifying, with high resolution and specificity, the depth and concentration with which the oils penetrate the fiber. The study aimed to analyze the permeation of copaíba, andiroba and coconut oils in the hair fiber in human hair using the confocal Raman spectroscopy technique. Five untreated hair fibers were considered as control (CTR) and five treated fibers (TTD) for each oil tested. The treatment consisted of depositing 10 µl of the test oil on the five fibers (TTD). Raman spectra were collected before and after 30 minutes of treatment with the oils, from the surface to a depth of 40 µm, corresponding to the cuticle, cortex and medulla every 2 µm. Data pre-processing was done by removing fluorescence, followed by smoothing (Savitzky-Golay filter, grade 5) and vector normalization. After processing the data, the biochemical characterization of the oils was carried out, the marker peaks were identified and, through the calculation of the area under the curve, the permeation profile of each oil was detected. Quantification of the concentration of permeated oil showed proximity between the permeation of copaíba oil (30.14 a.u.) and coconut oil (27.85 a.u.), however, andiroba oil, despite permeating to the deepest layer (medulla), the concentration was lower (14. 09 a.u.) in relation to other oils. This study demonstrated the efficiency of copaíba, coconut and andiroba oils with regard to permeation in hair fibers, generating information for the development of products capable of permeating even the innermost layer of hair fibers, thus providing recovery of damaged hair, ensuring a healthy hair fiber.