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A microwave assisted extraction (MAE) method has been developed for the extraction of polyphenols from grape seeds of Vitis vinifera cultivars Cabernet Sauvignon, Shiraz, Sauvignon Blanc and Chardonnay. An initial five-factor (ethanol concentration in the extraction solvent, liquid:solid ratio, time, power and temperature), five-level orthogonal experimental array was designed and three factors (ethanol...
The β-D-glucopyranoside of 3-methyl-4-hydroxyoctanoic acid (glucoside), exists in oak wood and is a potential precursor to cis-oak lactone. A method for the quantification of the glucoside in extracts of oak wood using liquid chromatography–tandem mass spectrometry was developed. The [ 2 H 4 ]-labeled analogue of the glucoside was synthesized and used as internal standard for the method...
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