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In the first section of this study, the effects of two different
extraction methods on the efficiency and chemical composition and
antioxidant activity were compared. Extraction efficiency of
supercritical fluid was significantly higher than distillation of water.
The results showed that antioxidant activity increased by increasing the
concentration of the essential oil. In the second part of the study, to
evaluate the impact of various walls, Lepidium sativum (LS) , Lepidium
perfoliatum (LP) and a combination of both (LP/LS)were used for
nano-encapsulation essential oil of basil by freeze-drying.
Nanoencapsulate powder was evaluated regarding efficiency, particle
size, PDI, Zeta poteintial,SEM, viscosity, Brix,pH, density.humidity, aw
and FTIR. In the third part, essential oil of basil in free mode at
Level 1%, 5% and 20% and in encapsulated at the level of 2% and TBHQ
at 0.01% added to Kilka oil without antioxidants and then the samples
were place in an oven at 60 ° C for 16 days. Storage stability of kilka
oil regarding peroxide, thiobarbituric and color were analyzed. The
results showed that basil essential oil had antioxidant activity and
reduced the oxidation process, and also nanocapsule essential oil
(especially with a coating of LP gum) showed better antioxidant activity
than free essential oil, so that its antioxidant activity is competitive
with TBHQ synthetic antioxidants. Finally, we can conclude that it is
possible to substitute synthetic antioxidants by natural ones like olive
leaf phenolic compounds but we have to apply some forms of encapsulation
techniques in order to protect their properties.
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