EMILIA SATOSHI MIYAMARU SEO
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Artigo IPEN-doc 28832 Critical analysis of mosquito repellents formulation in the Brazilian market2022 - GOMES, J.P.C.; BANKUTI, R.M.; MORAES, C.A.P.; SEO, E.S.M.Mosquitoes are responsible of a wide variety of infectious agents to humans. Malaria, dengue, yellow fever and other diseases transmitted by mosquito bites affect millions of people worldwide causing thousands of deaths each year, causing a major impact on the health services. National programmes to fight vector-born diseases are based on controlling the mosquito population with the use of insecticides in an attempt to interrupt the cycle of these diseases. Unfortunately, insecticide-resistant mosquitoes have already existed in many areas of the world. In Brazil, due to the difficulties in controlling mosquitoes, potential opportunities for intervention arise through innovations that can contribute to minimizing the current problem. We can highlight the use of mosquito repellents as an opportunity. The main aim of this work was to analyze and compare commonly commercialized repellent products in Brazil, designed to repel mosquitos, describing their composition according to ideal parameters for these products reported in scientific literature and also Brazilian legislation.It was a bibliographical review which was carried out using Scielo, Google Scholar and PubMed platforms to look for studies in national and international scientific literature. In addition, Brazilian legislation on the subject was used. The following keywords were used: mosquito, repellents, raw materials, and cosmetics. These keywords were searched for in Portuguese, Spanish and English. Despite the importance of repellents for public health, there is little variety of actives ingredients and formulations. The most important actives ingredients to repeal mosquitos are DEET, Icaridina and IR3535. And the formulations in Brazilian market are lotion, liquid and gel. Even though only a small fraction of the Brazilian population buys repellent products, commercial brands should invest in this sector with effective, safe, not harm the environment and have a good residual products.Artigo IPEN-doc 28408 Pseudoboehmite nanocarriers in cosmetic formulations2021 - HONEGGER, V.; SEO, E.S.M.; MIRANDA, L.F.; BARBOSA, I.T.F.The aim of this study is to contribute to the preparation and characterization of nanoemulsions for anti-aging cosmetic use. Palmarosa oil and Rosehip nanoemulsions were prepared with different active cosmetic ingredients such as mandelic acid and hyaluronic acid, in concentrations of 1%, 3% and 5% (wt%) of pseudoboehmite. After the nanoemulsions analysis, they were characterized in the following parameters: visual analysis, pH, density and optical microscopy. The results obtained show the possibility of using different compositions, the most suitable were: palmarosa oil nanoemulsion with 3 or 5wt% of mandellic acid/pseudoboehmite and palmarosa oil nanoemulsion with 1,3 or 5% of hyaluronic acid/pseudobohemite.Artigo IPEN-doc 28407 Obtaining and characterization of polymeric composites reinforced with natural fibers2021 - SEO, EMILIA S.M.; BARBOSA, ISABELLA T.F.; ATHIE, ALESSANDRO A.R.; LUCA, ADRIANO C. deCurrently, human activities cause impacts on the environment, and the generation of waste is a major concern. Among different residues will be agro-industrial residues, particularly residues of sugarcane bagasse and green coconut shell. Such chemically treated waste was reused as a polymer matrix reinforcement. In this sense, the present work aims to obtain and characterize polymeric composites reinforced with these natural fibers from green sugarcane bagasse and green coconut shell. The natural fibers were obtained by mercerization process, using sodium hydroxide and acetic acid in the optimized concentrations, washed in distilled water, dried, crushed and classified. By injection process, a polymeric composite made of high density polyethylene and different mass concentrations of natural fibers was obtained in a glass production matrix. The product obtained was characterized by a tensile test, verifying that the maximum tension obtained was 24.5 MPa for the concentrations of 3% and 5% (% wt) of natural fibers. In the compressive strength test, the sugarcane fibers showed greater tensile strength of 792.625 Kgf ± 73.873 at 5 (% wt) of fiber used, while for the higher coconut fibers, the tensile strength of 925,000 Kgf ± 12.832 at 3 (% wt) of fiber.