Articles
MONOUNSATURATED FATTY ACID ISOMERS OF GEVUINA AVELLANA MOL. NUT OIL AND ITS UV RADIATION FILTER BEHAVIOUR
Article number
845_97
Pages
619 – 626
Language
English
Abstract
The research programme for Gevuina avellana Mol. (Gevuin; Chilean hazelnut), has developed genotypes with interesting results for phytotherapy and cosmetic purposes.
The physical and chemical characteristics of nut oil have potential uses as skin care, for restoring treatments (turgor, elasticity, wound healing) and as UV radiation filter.
From 2003 to 2007, nut oil of selected clones was analyzed to determine the cis-monounsaturated fatty acids (cis-MUFAs) composition and UV filter quality of the nut oil.
HPLC and GC-MSD methods were used to determine the fatty acid content profile.
UV absorbance from different samples was analyzed with a Milton Roy Array 3000 spectrophotometer. 12 cis-MUFAs were detected, four of them being only traces.
Gevuin nut oil is composed of a great amount of unusual cis-MUFAs having between 14 to 24 carbons, with four different groups (C16, C18, C20, and C22). The effect of the positional double bond within the acyl chain (Δ/
), its molecular weight and carbon number together with the nature of its skin, could explain the UV filter behaviour in function of the different absorbance of the cis-MUFAs. Gevuina oil has an absorbance range starting at 350 nm up to a maximum at 250 nm, with a peak around 280 to 260 nm, with differential responses among clones.
The unique chemical composition of cis-MUFAs differentiates Gevuin from other seeds oils in respect to its UV filter behaviour.
The physical and chemical characteristics of nut oil have potential uses as skin care, for restoring treatments (turgor, elasticity, wound healing) and as UV radiation filter.
From 2003 to 2007, nut oil of selected clones was analyzed to determine the cis-monounsaturated fatty acids (cis-MUFAs) composition and UV filter quality of the nut oil.
HPLC and GC-MSD methods were used to determine the fatty acid content profile.
UV absorbance from different samples was analyzed with a Milton Roy Array 3000 spectrophotometer. 12 cis-MUFAs were detected, four of them being only traces.
Gevuin nut oil is composed of a great amount of unusual cis-MUFAs having between 14 to 24 carbons, with four different groups (C16, C18, C20, and C22). The effect of the positional double bond within the acyl chain (Δ/
), its molecular weight and carbon number together with the nature of its skin, could explain the UV filter behaviour in function of the different absorbance of the cis-MUFAs. Gevuina oil has an absorbance range starting at 350 nm up to a maximum at 250 nm, with a peak around 280 to 260 nm, with differential responses among clones.The unique chemical composition of cis-MUFAs differentiates Gevuin from other seeds oils in respect to its UV filter behaviour.
Publication
Authors
F. Medel, G. Medel, P. Jil, H. Palma, R. Mansilla
Keywords
Gevuina avellana, monounsaturated isomers, UV radiation filter
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