Flaxseed (Linum usitatissimum L.) is important source of oil and protein for industrial, pharmaceutical, and nutritional applications. In order to estimate the effects of lyophilized aqueous extract of flaxseed shell (AEF) and evaporated ethanolic extract of flaxseed shell (EEF), we studied their DPPH, ABTS, DMPD and O 2•-scavenging effects. 3+ reducing ability, and Fe 2+ chelating activity. Also, α-tocopherol, BHA, trolox, and BHT were used as positive controls. The results clearly AEF and EEF demonstrated effective antioxidant activity. The quantity of p-hydroxybenzoic, vanillin, p-coumaric acid, ascorbic acid, ferulic acid, and ellagic acid were investigated by LC-MS/MS. The present study will introduce a novelty for further studies on the antioxidant effects of AEF and EEF.

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Brevifilamentum were analyzed for their essential oil and phenolic components. For the essential oil analyses, GC-MS and GC-FID were used. Phenolic contents of the aerial parts of the chloroform, acetone, and methanol extracts were analyzed using LC-MS/MS. Antioxidant activity of the species was investigated by three methods; DPPH free radical scavenging activity, β-carotene linoleic acid assays and CUPRAC assays. Also, acetyl and butyrylcholinesterase inhibition of the extracts were investigated. While the essential oil contents of the section Brevifilamentum showed difference in chemotype, the phenolic contents were found to be coumaric acids and derivatives. These groups were the most abundant components of the extracts. Especially rosmarinic acid was detected in high amounts in acetone and methanol extracts. OA had the best activity both in antioxidant and anticholinesterase assays.

The fatty acid composition of the seed oil of 23 Stachys taxa was analysed by GC/MS. The main compounds were found to be linoleic (27.1-64.3%), oleic (20.25-48.1%), palmitic (4.3-9.1%), stearic (trace to 5.2%) and 6-octadecynoic (2.2-34.1%) acids. The latter compound could be used as a chemotaxonomic marker of the genus Stachys. A cluster analysis was performed for comparison and characterisation of the seed oil from Stachys species.

In present study, we report phenolic compounds and antioxidant activity of decoction and infusion of T. polium. The quantitative amounts of the phenolic contents were determined by LC-MS/MS. The main compounds and amounts were determined as follow for decoction ; fumaric acid, luteolin-7-O-glucoside, luteolin-5-O-glucoside, and pelargonin (2060.1; 1167.0; 835.2; 829.9 mg/kg dried herba, respectively). For the infusion sample main compounds and amounts were as follow; fumaric acid, luteolin-7-O-glucoside, pelargonin, and luteolin-5-O-glucoside (1456.2; 431.1; 312.5; 278.4 mg/kg dried herba, respectively , luteolin-7-O-glikozit, pelargonin ve luteolin-5-Oglikozit (sırasıyla 1456.2; 431.1; 312.5; 278.4