Graduate Thesis Or Dissertation
 

Effect of chemical composition on textural quality of red wine

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/6d570089x

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  • Red wine texture is a particularly important property of overall red wine quality whose origin is not well understood. The overall goal of this study was to improve our understanding of how chemical composition influences red wine texture. Unlike previous studies that have used model systems to investigate how chemical composition influences red wine texture, this study used a different approach of analyzing wines whose texture has been characterized through sensory evaluation. This project had three main objectives. The first object was to develop analytical methods for determining wine chemical composition. A method for determining polysaccharides in wine based on acidified ethanol precipitation of polysaccharides was optimized and validated. The second objective was to analyze wines whose texture profile had been established through sensory evaluation with the goal of studying the relationship between wine composition and texture. The final objective was to investigate how grape maturity and vine vigor influenced extraction of polysaccharides and non-volatile solutes into wine. These wine constituents had earlier been found to have a generally positive effect on wine texture quality.
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  • Text: File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.Graphs: File scanned at 300 ppi (256 Grayscale) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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