Levels of selenium, dl-α-tocopherol, dl-γ-tocopherol, all-trans-retinol, thymoquinone and thymol in different brands of Nigella sativa seeds

Fatty acid, tocopherol, mineral composition, total phenolic, flavonoid and thymoquinone content, and antioxidant potential of Nigella stellaris

“…The oil contained α-tocopherol (2.04±0.07 mg/100 g) and δ-tocopherol (0.17±0.01 mg/100 g). Our results were quite different from the tocopherol composition of N. sativa seed oil that the oil had mainly α-and γ-tocopherols [8,16].…”

“…The seeds had a thymoquinone (TQ) concentration of 0.02±0.0003 µg/mL. In the literature, the presence of TQ in essential/fixed oil and the methanolic extract of N. sativa seed were determined by different methods [8,29]. It was found that TQ content ranged between 3098.5-1274.6 mg/kg in the seeds from different origin [8].…”

“…In the literature, the presence of TQ in essential/fixed oil and the methanolic extract of N. sativa seed were determined by different methods [8,29]. It was found that TQ content ranged between 3098.5-1274.6 mg/kg in the seeds from different origin [8]. It has been shown to be the principal active ingredient in the seeds of N. sativa [9].…”

“…The volume was completed to 10 mL with methanol. An aliquot of 20 µL was injected into the HPLC [8].…”

“…Black cumin has been extensively studied phytochemically and pharmacologically [5,6] and it was known that the plant contain fixed and volatile oil, quinonic compounds, vitamins, phenolic compounds, alkaloids, saponins, sterols, minerals, aminoacids, proteins and carbonhydrates [6][7][8][9]. Recent studies showed that N.sativa have antimicrobial, anticestode, antitumor, antidiabetic, antioxidant, antiallergic, anti-inflammatory, immunomodulatory, antiaflatoxine, spasmolytic, bronchodilator, hypocholesterolemic, hypotensive, hepatoprotective, antinociceptive, neuroprotective and anticonvulsant effects [5][6][7][8][9][10][11][12].…”