The essential oil of locally available Trachyspermumammi(ajowan) seeds was obtained through hydrodistillation. Its chemical composition analysed by gas chromatography mass spectrometry (GC-MS). Twenty - two compounds EO were identified with the help NIST library. Thymol (38.5%), ρ-cymene (27.2%) and γ-terpinene (26.8%) as major components. Furthermore, its antioxidant power IC50 value 65.3 μ...

In this study a cobalt(II) complex of quercetin was synthetized in the solid state with general formula Co(C15H9O7)2∙2H2O. The FT-IR, elemental analysis, and UV/Vis methods were used to composition water solution. anti-/pro-oxidant activity Co(II) studied by means spectrophotometric DPPH (2,2-diphenyl-1-picrylhydrazyl), FRAP (ferric reducing antioxidant activity) Trolox oxidation assays. cytoto...

Three new orcinol (3-hydroxy-5-methylphenol)-conjugated hydrolysable tannins, together with two known compounds were isolated from the leaves of Cleyera japonica (CJ), and have been tentatively named cleyeratannin A (1), cleyeratannin B (2) and cleyeratannin C (3). The chemical structures of these compounds were elucidated using 1 dimensional (1D)/2D NMR and high resolution FAB-MS, and the abso...

A series of new 5-(2-amino-5-methylthiazol-4-yl)-1,3,4-oxadiazole-2-thiol derivatives 6(a-j) were designed and synthesized with various substituted aldehydes. The chemical structures were confirmed by elemental analyses, FT-IR, (1)H NMR, and mass spectral studies. The antioxidant activity of the synthesized compounds was evaluated by 2,2-diphenyl-1-picrylhydrazyl (DPPH), hydroxyl, nitric oxide,...

EPR spectroscopy, in a constant-frequency field-swept experiment, was used to determine the resonant magnetic field, g-factor, line width, and hyperfine constant for diphenyl picrylhydrazyl at room temperature manganese (II) chloride cryogenic temperatures (using liquid nitrogen). Diphenyl determined be free radical, indicated by g-factor of 2.022, with field 3.23 kG microwave frequency 9.14 GH...

A new butenolide derivative (1), along with three known compounds (2-4) were isolated from the MeOH extract of brown alga Sargassum micracanthum. The structures 1 to 4 determined by analyses 1D and 2D NMR mass spectroscopic data. identified as (5 E,10 Z)-6,10,14-trimethylpentadeca-5,10-dien-2,12-dione (2), E,9 E)-6,10,14-trimethylpentadeca-5,9-dien-2,12-dione (3), (-)-loliolide (4) comparing th...

The antioxidant action of ethanolic extract from Agaricus bisporus which is available in the supermarkets of Bucharest, Romania, was assessed by determining its reducing power and its radical scavenging activity. The determinations were made by analyzing the freeze-dried ethanolic extract. The radical scavenging activity was determined using 2, 2-diphenyl-1-picrylhydrazyl (DPPH), superoxide rad...

This study was done to investigate the interaction effect of the mixture of each pair of traditional medicinal plants including: Sage (Salvia officinalis), Hawthorn (Crataegusoxyacantha), Walnut Leaf (Juglansregia L.), Red Cabbage (Brassica oleracea), and Yellow Sweet Clover (Melilotus officinalis) on the antioxidant activities and free radical scavenging by using DPPH (2, 2-diphenyl-1-picrylhy...

We evaluated the antioxidant activity and tyrosinase inhibitory effects of Pleurotus ostreatus fruiting bodies extracted with acetone, methanol, and hot water. The antioxidant activities were tested against β-carotene-linoleic acid, reducing power, 1,1-diphenyl-2-picrylhydrazyl free radical scavenging activity, and ferrous chelating ability. Furthermore, phenolic acid and flavonoid contents wer...