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A rapid and accurate method by liquid chromatography/tandem mass spectrometry (LC–MS/MS) using positive electrospray was established for the determination of ricinine in cooking oils. The homogenized samples, spiked with 13 C 6 -labelled ricinine as an internal standard, were extracted using ethanol/water (20:80, v/v) and purified by dispersive solid-phase extraction (dSPE) using primary–secondary...
The objective of this study was to evaluate the antioxidant activity of cultivated fruiting bodies of an endophytic Xylaria sp. (strain number YX-28), from Ginkgo biloba. The results indicated that the methanol extract exhibited strong antioxidant capacity in both 2,2-diphenyl-1-picrylhydrazyl (DPPH) analysis and β-carotene–linoleic acid model system. Total phenolic and flavonoid contents extracted...
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