title: White wine taste and mouthfeel as affected by juice extraction and processing.
abstract: The juice used to make white wine can be extracted using various physical processes that affect the amount and timing of contact of juice with skins. The influence of juice extraction processes on the mouthfeel and taste of white wine and their relationship to wine composition were determined. The amount and type of interaction of juice with skins affected both wine total phenolic concentration and phenolic composition. Wine pH strongly influenced perceived viscosity, astringency/drying, and acidity. Despite a 5-fold variation in total phenolics among wines, differences in bitter taste were small. Perceived viscosity was associated with higher phenolics but was not associated with either glycerol or polysaccharide concentration. Bitterness may be reduced by using juice extraction and handling processes that minimize phenolic concentration, but lowering phenolic concentration may also result in wines of lower perceived viscosity.
authors.affiliation: Australian Wine Research Institute , P.O. Box 197, Glen Osmond, Adelaide, South Australia 5064, Australia.
authors.forename: Richard
authors.initials: R
authors.lastname: Gawel
authors.forename: Martin
authors.initials: M
authors.lastname: Day
authors.forename: Steven C
authors.initials: SC
authors.lastname: Van Sluyter
authors.forename: Helen
authors.initials: H
authors.lastname: Holt
authors.forename: Elizabeth J
authors.initials: EJ
authors.lastname: Waters
authors.forename: Paul A
authors.initials: PA
authors.lastname: Smith
mesh_terms: D000328:Adult; D001628:Beverages / Q000032:analysis; D005260:Female; D005511:Food Handling; D006801:Humans; D008297:Male; D010636:Phenols / Q000032:analysis; D028321:Plant Preparations / Q000737:chemistry* / Q000302:isolation & purification; D013649:Taste; D027843:Vitis / Q000737:chemistry*; D014920:Wine / Q000032:analysis*
chemical_list: D010636:Phenols; D028321:Plant Preparations
keywords: bitterness; hyperoxidation; mouthfeel; phenolics; polysaccharides; skin contact; white wine