dc.contributor.author |
H Sawalha, R den Adel, P Venema, A Bot, E Flöter, E van der Linden |
|
dc.date.accessioned |
2019-12-08T11:06:26Z |
|
dc.date.accessioned |
2022-05-22T08:52:13Z |
|
dc.date.available |
2019-12-08T11:06:26Z |
|
dc.date.available |
2022-05-22T08:52:13Z |
|
dc.date.issued |
2012 |
|
dc.identifier.uri |
http://localhost:8080/xmlui/handle/123456789/8069 |
|
dc.description.abstract |
In this study, water-in-oil emulsions were prepared from water containing different salt concentrations dispersed in an oil phase containing a mixture of β-sitosterol and γ-oryzanol. In pure oil, the β-sitosterol and γ-oryzanol molecules self-assemble into tubular microstructures to produce a firm organogel. However, in the emulsion, the water molecules bind to the β-sitosterol molecules, forming monohydrate crystals that hinder the formation of the tubules and resulting in a weaker emulsion-gel. Addition of salt to the water phase decreases the water activity, thereby suppressing the formation of sitosterol monohydrate crystals even after prolonged storage times (∼1 year). When the emulsions were prepared with less polar oils, the tubular microstructure was promoted, which significantly increased the firmness of the emulsion-gel. The main conclusion of this study is that the formation of oryzanol and sitosterol tubular microstructure in the emulsion can be promoted by reducing the water activity and/or by using oils of low polarity. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
American Chemical Society |
en_US |
dc.subject |
Organogel emulsion tubules water activity polarity self-assembly |
en_US |
dc.title |
Organogel-emulsions with mixtures of β-sitosterol and γ-oryzanol: influence of water activity and type of oil phase on gelling capability |
en_US |