Phenolic composition of European cranberrybush (Viburnum opulus L.) berries and astringency removal of its commercial juice

Phenolic composition of the European cranberrybush (ECB) (Viburnum opulus L.) juice was determined using high-performance liquid chromatography. The juice contained 2037 mg kg(-1) chlorogenic acid, which was 54% of total phenolics, and several other phenolics such as (+)-catechin, (-)-epicatechin, cyanidin-3-glucoside, cyanidin-3-rutinoside and six different glucosides of quercetin. Because of its strong astringent taste, the juices were treated with various doses of two different types of activated carbons (Granucol Bi and Granucol Ge) in order to remove phenolic compounds. Results revealed that both types of activated carbons were equally effective on astringency removal (P < 0.01). A 20-30% reduction in total phenolics was achieved by application of 2.0-3.0 g L-1 activated carbon which also removed unpleasant taste and odour

Sensory characterization of vitis vinifera cv. Malbec wines from seven viticulture regions of Argentina

Abstract: Fifty six Malbec wines from seven Argentine viticulture regions (Valles Calchaquíes, Mendoza del Este, Mendoza del Sur, Patagonia, Alto Río Mendoza, Valle de Uco and San Juan), of the 2004 vintage, were evaluated by sensory descriptive analysis using a panel of ten not sighted assessors. “Non commercial” samples were obtained using standardized conditions, not ageing and produced with grapes corresponding to each viticulture region. Malbec wines from same regions exhibited particular characteristics. Valles Calchaquíes wines had strong herbal, spicy, sweet pepper aromas and pungency in contrast to San Juan wines that showed fruity, strawberry, honey and citrus aromas. Mendoza del Este and Valle de Uco wines were associated with cooked fruit, raisin, floral and sweetness attributes as opposed to Mendoza del Sur and Patagonia wines which were characterized by sourness, bitterness, persistency and astringency and not by aroma attributes. Alto Río Mendoza wines were characterized by pungency, sweet pepper and bitterness