ABSTRACT
The identification of more than three perfumes is difficult and no analytical tool can completely replace the human olfactory system for fragrance classification. Indeed, no analytical system can mimic the human fragrance perception, being the recognition of perfume aroma patterns by conventional or sensor-based analytical tools a challenging task. For the perfume sector, the possibility of applying fast, cost-effective and green analytical devices for perfume analysis would represent a huge economic revenue. Since the perfume aroma pattern will depend on the composition of the liquid phase and on the diffusion properties of their volatile components, this work aimed to apply a potentiometric electronic tongue, comprising non-specific cross-sensitive lipid polymeric membranes, combined with chemometric techniques, as a novel perfume classifier. The multisensors device allowed establishing perfumes' unique fingerprints, which were successfully used to discriminate men from women perfumes, to identify the perfume aroma family (Citric-Aromatic, Floral, Floral-Fruity, Floral-Oriental, Floral-Woody, Woody-Oriental and Woody-Spicy) and, assessing the perfume storage time-period (≤ 9 months; 9-24 months; and, ≥ 24 months). The established linear discriminant models were based on single-run potentiometric profiles gathered by sub-sets of sensors selected using the simulated annealing algorithm, which enabled achieving correct classification rates of 93-100% (for leave-one-out cross-validation procedure). The satisfactory performance of the electronic tongue demonstrates the versatility of the proposed approach as a practical perfume preliminary classifier sensor device, which industrial application may be foreseen in a near future, contributing to a green-sustained economic growth of the perfume industry.
ABSTRACT
Introdução: As queimaduras constituem um importante problema de saúde pública, representando a segunda causa de morte na infância não só nos Estados Unidos como também no Brasil. Porém, existem poucos dados e informações disponíveis para orientar programas de prevenção. O objetivo do trabalho foi de analisar dados epidemiológicos de pacientes com o diagnóstico de queimadura internados traçando um perfil dos pacientes no período estudado. Método: Estudo retrospectivo dos 716 pacientes internados no período de janeiro de 2011 a maio de 2017 na Santa Casa de Misericórdia de Santos (SCMS) para a especialidade de Cirurgia Plástica. Foram analisados o perfil demográfico, tempo de internação e mortalidade. Resultados: Dos 716 pacientes internados, a média de idade total é de 29 anos em ambos sexos e nesse período 28 foram a óbito, com média de idade de 58,6 anos. Conclusão: O estudo mostrou o perfil dos pacientes internados na SCMS e a importância dos cuidados com os pacientes queimados e todos os fatores de mau prognóstico, como a idade mais avançada, que se colocou como um importante fator para a evolução desfavorável dos casos.
Introduction: Burns are an important public health problem, representing the second cause of death in childhood not only in the United States but also in Brazil. However, available data and information for guiding prevention programs are limited. The objective of this study was to analyze the epidemiological data of hospitalized patients diagnosed with burns and to outline a profile of the patients in the study period. Methods: A retrospective study of the 716 hospitalized patients from January 2011 to May 2017 at Santa Casa de Misericórdia de Santos (SCMS) for Plastic Surgery was performed. The demographic profile, length of hospital stay, and mortality were analyzed. Results: Of the 716 hospitalized patients, the mean age was 29 years in both sexes, and 28 patients, with a mean age of 58.6 years, died during the study period. Conclusion: The study showed the profile of hospitalized patients in SCMS and the importance of care in burn patients. All factors of poor prognosis were determined, and older age was considered an important factor for the unfavorable progression of the cases.
