Antioxidant Potential of the Extracts, Fractions and Oils Derived from Oilseeds

Abstract

The polyphenolic extracts and oils were obtained from ajwain, mustard, fenugreek and poppy seeds. The extracts were partitioned into acidic and neutral polyphenolic fractions and following estimation of total phenolics in the crude extract, acidic and neutral fractions and oil, all were analyzed for their DPPH (2,2-diphenyl-1-picrylhydrazyl) scavenging potential, ferric reducing ability and chelating power. The highest amount of polyphenols was found in ajwain (8330 ± 107), then in mustard seeds (2844 ± 56.00) and in fenugreek (1130 ± 29.00), and least in poppy seeds (937 ± 18.52). The higher amounts of polyphenols were estimated in neutral fraction compared to acidic (p < 0.05). % Inhibition of DPPH by the crude extract and fractions of all oilseeds was quite significant, being higher for acidic than neutral. The highest % DPPH inhibition was shown by ajwain extract than mustard > fenugreek and least by poppy seed extracts (p < 0.05). The reducing power and the chelating effect of the oilseeds followed the same order as DPPH, but higher % chelation was shown by neutral than acidic fraction (p < 0.05). Though low in polyphenols, the oil fractions were as strong antioxidants as the acidic one. Though oilseeds are used in very small quantity in food, they are potential sources of natural antioxidants and may replace synthetic ones.

Identification and quantification of canolol and related sinapate precursors in Indian mustard oils and Canadian mustard products

“…Differences were also observed among the different brands of mustard oils with the Good Choice mustard oil containing the highest level of total phenolics (0.32 SAE mg/g) followed by Dabur (0.24 SAE mg/g), KTC (0.20 SAE mg/g), and Gagan (0.15 SAE mg/g) mustard oils. Expressing the results in gallic acid equivalence (GAE), thus making comparison of results with the data from the current study rather difficult, Janu et al reported a TPC of 0.0056 mg/g for an Indian unrefined mustard oil whereas Ishtiaque et al reported TPC of 3.60 mg/g for crude Pakistani mustard oil.…”

Evaluation of Antioxidant Activity of Some Indian Spices using Different In-Vitro Methods

“…El-Serehy et al [54] showed aqueous extracts of CC contains 22.08 mg/g of GAE TPC which is much lower than ethanolic extracts (Table 4). Results were significant with the study of Ishtiaque et al & Sivakumar and Meera [55,56]. Phenolics are better extracted in ethanolic solvent than other.…”

Relationship Between Lipid Assessment and Arterial Lesions Observed in Farm Chickens Fed on Different Vegetable Oils

“…Thus, palm oil presents the same benefits at the nutritional level as well as the histological level (on the arteries of chicken) as soya and cotton seed oils. Moreover, In addition to its numerous virtues, its high content of antioxidants and β-carotene plays a protective role in many pathologies including vitamin A deficiency, certain cancers and cardiovascular disease [26][27][28]. There was a significant fall in the HDL/LDL ratio in chickens fed on groundnut oil, whereas it was higher or constant for chickens fed on other vegetable oils.…”