TITLE:
Antioxygenic Activity of Solanum nigrum L. Leaves in Sunflower Oil Model System and Its Thermal Stability
AUTHORS:
Ananthan Padmashree, Gopal Kumar Sharma, Anil Dutt Semwal, Chitrashekarachar Mahesh
KEYWORDS:
Solanum nigrum L., Antioxygenic Activity, Solvent Extraction, Thermal Stability Phenolics, Flavonoids, Antioxygenic Activity, Solvent Extraction, Thermal Stability Phenolics, Flavonoids
JOURNAL NAME:
Food and Nutrition Sciences,
Vol.5 No.11,
June
18,
2014
ABSTRACT: The antioxygenic activity of Solanum
nigrum L. leaves and its various solvent extracts were evaluated
using sunflower oil model system. Leaf powder and its methanol/water (80:20)
soluble fraction showed strong antioxygenic activity in refined sunflower oil.
On the other hand, ethyl acetate fraction exhibited marginal antioxygenic
activity, whereas the water soluble fraction was practically devoid of any
activity in refined sunflower oil. Thermal stability of different extracts of Solanum nigrum L. leaves
heated at 80?C in refined sunflower oil also indicated the strong efficacy of
methanol/water (80:20) extract to inhibit thermal oxidation. Solanum nigrum L. contain
high levels of magnesium (239.0 mg/100g) and phosphorous (80.3 mg/100g). Fatty
acid analysis of the lipid extracted from Solanum
nigrum L. leaves indicated the presence of linoleic (59.1%) as a
major fatty acid. The result of this study confirmed the presence of
antioxygenic compounds in leaves, in particular its methanol/water (80:20)
extracts showed great potential as a natural antioxidant to inhibit lipid
peroxidation in foods.