Data/hora: 04/06/2024 10:50:39

Provedor de dados: | Brazilian Archives of Biology and Technology
País: | Brazil
Título: | Characterization and shelf life of β-carotene loaded solid lipid microparticles produced with stearic acid and sunflower oil
Autores: | Gomes,Graziela Veiga de Lara; Borrin,Thais Ribeiro; Cardoso,Lisandro Pavie; Souto,Eliana; Pinho,Samantha Cristina de.
Data: | 2013-08-01
Ano: | 2013
Palavras-chave: | Solid lipid microparticles; Β-carotene; Microencapsulation.
Resumo: | Solid lipid microparticles were tested as microencapsulation systems for protecting β-carotene from degradation. Blends of long-chain (C18) solid lipids (70% stearic acid) and sunflower oil (30%) were used to produce lipid microparticles encapsulating the carotenoid. Polysorbate 80 (4%) was employed to stabilize the stearic acid microparticles. The concentration of β-carotene was monitored using spectrophotometry, the particle size distribution was measured by laser diffraction, the crystal structure was determined by wide angle X-ray diffraction (WAXD), and the thermal behaviour was characterized by differential scanning calorimetry (DSC) over a period of seven months. All of the systems had an average particle size smaller than 5 µm. To avoid β-carotene oxidation, α-tocopherol was added to the formulations and its action as an oxygen trap was crucial for the antioxidant effect. For stearic-acid microparticles with a-tocopherol, more than 90% of the initial amount of β-carotene was preserved after seven months under refrigerated storage (7-10°C) in the dark. Significant microstructural alterations were detected using WAXD and DSC only in the stearic acid microparticles without alpha-tocopherol. These results seemed promising and suggested that the blends of long-chain solid lipids and liquid lipids were suitable for the production of stable solid lipid microparticles.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000400017
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132013000400017
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.56 n.4 2013
Fonte: | info:eu-repo/semantics/openAccess