| Registro completo |
| Provedor de dados: |
BJPS
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| País: |
Brazil
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| Título: |
Evaluation of foam properties of saponin from Ilex paraguariensis A. St. Hil. (Aquifoliaceae) fruits
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| Autores: |
Canto,Gizele Scotti do
Treter,Janine
Yang,Samanta
Borré,Gustavo Luís
Peixoto,Maria Paula Garofo
Ortega,George González
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| Data: |
2010-06-01
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| Ano: |
2010
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| Palavras-chave: |
Ilex paraguariensis
Aquifoliaceae
Mate
Saponins
Surfactants
Foam
Assay
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| Resumo: |
Saponins are natural compounds able to form abundant foam, a desirable quality required in some chemical, foods, cosmetic and pharmaceutical processes. Ilex paraguariensis A. St. Hil. (Aquifoliaceae) known as mate, is a South American widely cultivated specie due to the preparation of a tea-like beverage from its leaves. Moreover, its green fruits are a rich source of non-toxic and very low haemolytic saponins. In this study, mate saponin fraction (MSF) was evaluated as a foam former, focusing on its foamability, foam lifetime, and film drainage in the presence of different electrolytes (ionic strength I = 0.024 M). Sodium dodecyl sulphate (SDS) and polysorbate 80 (Poly-80) were used as reference surfactants. The critical micelle concentration (CMC), the minimum attainable surface tension (γCMC), surface excess concentration (Γ) and cross-section molecular surface (A) values of MSF were comparable to those of Poly-80. The foamability of MSF and both reference surfactants was equivalent. The addition of MgCl2 resulted in a negative effect on MSF foamability. The salts NaCl, KBr, and KNO3 exhibited a negative influence on MSF foam lifetime. Similar behavior was observed for MSF film drainage (order of activity: Na2HPO4 > MgCl2 ≈ NaCl ≈ KNO3 > KBr), where a primary fast film drainage rate was followed by film thinning stabilization after around 5 min. The behavior described above seems to be uncorrelated to the solutions' zeta potential.
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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=S1984-82502010000200010
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| Editor: |
Universidade de São Paulo, Faculdade de Ciências Farmacêuticas
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| Relação: |
10.1590/S1984-82502010000200010
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| Formato: |
text/html
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| Fonte: |
Brazilian Journal of Pharmaceutical Sciences v.46 n.2 2010
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| Direitos: |
info:eu-repo/semantics/openAccess
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