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Advisor(s)
Abstract(s)
O objetivo deste trabalho foi desenvolver duas formulações cosméticas para aplicação tópica que combinem produtos apícolas e óleos essenciais de plantas medicinais. Foi testado o efeito de dois produtos apícolas diferentes (extrato hidroalcoólico de própolis e dois méis de Lavandula spp. com diferentes proveniências) e de óleos essenciais de duas espécies diferentes (Thymus Zygis L. subsp. Zygis e Mentha pulegium L.). Para tal elaboraram-se várias preparações às quais foi adicionado um óleo essencial e um produto apícola.
Foi ainda elaborada, para cada tipo de formulação, uma preparação com óleo essencial, mas sem nenhum produto apícola e uma preparação sem óleo essencial, nem produto apícola. Relativamente aos produtos apícolas o mel de Lavandula spp. foi utilizado na proporção de 1:50 (v/m) e de 1:20 (v/m) e o extrato hidraalcoólico de própolis foi adicionado numa concentração de 5% (m/v). A concentração de óleo essencial utilizada foi de 7,86x10-4 g/g (o.e/emulsão).
Para cada uma das formulações foram elaborados testes físico-químicos, de estabilidade e microbiológicos. Quando submetidas aos testes de luminosidade, uma das preparações não apresentou alterações na cor, tendo-se verificado no entanto uma diminuição do pH de 4,7 para 3,6 nessa preparação. Em relação às restantes amostras todas apresentaram uma alteração na cor de bege para branco, pelo que se pode concluir que as amostras são fotossensíveis. Quando submetidas a testes de vibração não foi verificada qualquer alteração no aspeto das emulsões. O valor da densidade relativa de todas as amostras situou-se no intervalo entre 0,5-0,6.
The aim of this work was to develop two cosmetic formulations for topical application that combine bee products and essential oils from medicinal plants. The effect of two different bee products (hydroalcoholic extract of propolis and two honeys of Lavandula ssp. with different provenance) and essential oils from two different species (Thymus zygis L. ssp. zygis and Mentha pulegium L.) was tested. For that purpose, several preparations were elaborated to witch one essential oil and a bee product were added. For each type of formulation, one preparation with essential oils (e.o.) but without a bee product and a preparation without any essential oil or bee product was also prepared. In relation to the bee products, the Lavandula spp. honey was used in the proportion of 1:50 (v/m) and 1:20 (v/m); the hydroalcoholic extract of propolis, using ethanol, was add in a concentration of 5% (m/v). The concentration of essential oil used was 7.86x10-4 g/g (e.o./ emulsion). Additionally was also tested the toxicity of the two essential oils through the LD50 determination, using Artemia Salina L. Physical chemical, stability and microbiological tests were made to each formulation. When submitted to the light tests, one preparation didn’t change color, however, it was verified a diminution in the pH from 4.7 to 3.6. In relation to the others samples, all presented a color change from beige to white. When submitted to the vibration test alterations in the emulsion aspect were not verified. The relative density value of all the samples was between 0.5 and 0.6.
The aim of this work was to develop two cosmetic formulations for topical application that combine bee products and essential oils from medicinal plants. The effect of two different bee products (hydroalcoholic extract of propolis and two honeys of Lavandula ssp. with different provenance) and essential oils from two different species (Thymus zygis L. ssp. zygis and Mentha pulegium L.) was tested. For that purpose, several preparations were elaborated to witch one essential oil and a bee product were added. For each type of formulation, one preparation with essential oils (e.o.) but without a bee product and a preparation without any essential oil or bee product was also prepared. In relation to the bee products, the Lavandula spp. honey was used in the proportion of 1:50 (v/m) and 1:20 (v/m); the hydroalcoholic extract of propolis, using ethanol, was add in a concentration of 5% (m/v). The concentration of essential oil used was 7.86x10-4 g/g (e.o./ emulsion). Additionally was also tested the toxicity of the two essential oils through the LD50 determination, using Artemia Salina L. Physical chemical, stability and microbiological tests were made to each formulation. When submitted to the light tests, one preparation didn’t change color, however, it was verified a diminution in the pH from 4.7 to 3.6. In relation to the others samples, all presented a color change from beige to white. When submitted to the vibration test alterations in the emulsion aspect were not verified. The relative density value of all the samples was between 0.5 and 0.6.
Description
Keywords
Produtos apicolas Estabilidade Emulsão Toxicidade
Citation
Frazão, Joana; Sousa, Maria João; Martins, Vitor Manuel Ramalheira (2016). Desenvolvimento e determinação da estabilidade e toxicidade de duas formulações cosméticas. In Martins, Anabela (Ed.) II Encontro de Investigadores do Instituto Politécnico de Bragança: livro de resumos. Bragança: Instituto Politécnico. ISBN 978-972-745-218-7
Publisher
Instituto Politécnico de Bragança