| Registro completo |
| Provedor de dados: |
BABT
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| País: |
Brazil
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| Título: |
Characterization and shelf life of β-carotene loaded solid lipid microparticles produced with stearic acid and sunflower oil
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| Autores: |
Gomes,Graziela Veiga de Lara
Borrin,Thais Ribeiro
Cardoso,Lisandro Pavie
Souto,Eliana
Pinho,Samantha Cristina de
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| Data: |
2013-08-01
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| Ano: |
2013
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| Palavras-chave: |
Solid lipid microparticles
Β-carotene
Microencapsulation
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| 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.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000400017
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| Editor: |
Instituto de Tecnologia do Paraná - Tecpar
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| Relação: |
10.1590/S1516-89132013000400017
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| Formato: |
text/html
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| Fonte: |
Brazilian Archives of Biology and Technology v.56 n.4 2013
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| Direitos: |
info:eu-repo/semantics/openAccess
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