Abstract
The ethanol and methanol extracts of Jojoba ( Simmondsia chinensis (Link). Schnider) leaves and seeds were screened for antioxidant activity. The antioxidative potential of ethanol and methanol extracts of Jojoba ( Simmondsia chinensis ) were investigated for the first time using DPPH 2,2-diphenyl-1-picrylhdrazyl, total phenolic contents, antioxidant activity. Total phenolic substance amounts were calculated according to Folin-Ciocalteu method, substance concentrations in mg/GAE g, equivalent to gallic acid based on mg/ml gallic acid equivalent (GAE). The phenolic substance amounts in the leaves extracts (jojoba leaves: 313 mg/g GAE). Free radical clearance activities of the extracts were determined by using DPPH free radical. The Phenolic substances were calculated in highest jojoba leaves and lowest jojoba seeds. When DPPH radical clearance activity results were analyzed, it was seen that the highest activity was exhibited by jojoba leaf extract (% 43.20, 0.5 mg/ml concentration). The antioxidant activities of extracts were calculated in (nmol/g) via ascorbic acid system. When the activity scores are analyzed, higher scores were found in the ethanol extracts of jojoba leaves. The antioxidant activity was lower in the extracts with methanol.
Highlights
IntroductionDue to the fact that these seeds have a high percentage of wax and proteins, they represent valuable raw material for various industries such as the jojoba wax producer and the animal food manufacturer, respectively [3]
The phenolic content ofthe ethanolic extracts are higher than the methanolic extracts
Total phenolic substance amounts were calculated according to Folin-Ciocalteu method, substance concentrations in mg/GAE g, equivalent to gallic acid based on mg/ml gallic acid equivalent (GAE)
Summary
Due to the fact that these seeds have a high percentage of wax and proteins, they represent valuable raw material for various industries such as the jojoba wax producer and the animal food manufacturer, respectively [3]. Phenolic compounds are a complex, but important group of naturally occurring products in plants and are present in the pharmacological products which includes jojoba seed and leaves. Phenolic compounds are plant secondary metabolites, which play important roles in disease resistance [4], protection aganist pests and species dissemination. The interest on these compounds is related with their antioxidant activity and promotion of health benefits.
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