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Use of Organoleptic Methodologies to Evaluate Wine Oligosaccharides and Wines made from Grapevine Red Blotch Virus Positive Vines Subjected to Various Vineyard Management Practices

Creator:: Hoffman, Samuel
Abstract:: The human senses can be used as analytical tools to evaluate many different aspects of our daily lives. The use of our senses through organoleptic methods offers unique and powerful insights into the characteristics of different stimuli. Due to the unique function of the different sensory organs we use to...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: _____________________________________________________ James P. Osborne The

Interactions between Oenococcus oeni and Brettanomyces bruxellensis during winemaking and consequences for wine quality

Creator:: DuBois, Aubrey E.
Abstract:: The growth of Brettanomyces bruxellensis is a major cause of wine spoilage due tothe production of the volatile phenols 4-ethylphenol (4-EP) and 4-ethylguaiacol (4-EG), derivatives of p-coumaric acid and ferulic acid. During the winemaking process,some microorganisms can impact the concentration of the 4-EP precursors pcoumaricand coutaric acid (tartaric acid-esterified p-coumaric...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________ James P. Osborne The growth of Brettanomyces bruxellensis is a

Influence of Biotic and Abiotic Factors on Yeast Communities during Cold Soak and the Consequences for Wine Aroma

Creator:: Johnson, Jared D.
Abstract:: Pre-fermentation cold soak is a winemaking technique used to alter the color, mouthfeel, and aroma of red wine. While it is still debated what impact cold soak has on these wine quality parameters, current thoughts are that resident yeast populations found in fresh grape must play a role in altering...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________ James P. Osborne Pre-fermentation cold soak is a winemaking

The Influence of Vineyard and Winery Nitrogen Supplementation on Chardonnay and Pinot Noir Winemaking and Wine Quality

Creator:: Ruppel, Meghan L.
Abstract:: Nitrogen is a crucial nutrient required by yeast to successfully complete alcoholic fermentation. In particular, the concentration of yeast assimilable nitrogen (YAN) influences fermentation kinetics and the production of a range of volatile aroma compounds, both desirable and undesirable. YAN is naturally present in the grape, but producers can boost...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ James P. Osborne Nitrogen is a crucial nutrient required by yeast to successfully

Exploration into the Influence of Malolactic Fermentation Parameters and Pre-fermentation Juice Treatment on Chardonnay Mouthfeel

Creator:: Sereni, Anthony
Abstract:: Mouthfeel is one of the most important quality parameters of Chardonnay wines. Malolactic fermentation (MLF) is an important process in wine production, and influential to wine mouthfeel, with the reduction in acidity being particularly important for cool climate wines that generally have higher acidity such as Chardonnay. MLF is typically...
Resource Type:: Masters Thesis
Full Text:: James P. Osborne Mouthfeel is one of the most important quality parameters of Chardonnay

Effect of lactic acid bacteria growth on Brettanomyces bruxellensis growth and production of ethylphenols

Creator:: Chescheir, Stuart C.
Abstract:: The yeast Brettanomyces bruxellensis is the most important wines spoilage yeast encountered during winemaking as it can survive in wine for long periods, requires minimal nutrients for growth, and can be difficult to control. Brettanomyces produces two major spoilage products, the volatile phenols 4-ethylphenol (Band-Aid, medicinal smell) and 4-ethylguaiacol (smoke,...
Resource Type:: Masters Thesis
Full Text:: Growth and Production of Ethylphenols Abstract approved: James P. Osborne The yeast

Investigation of Optimal Extraction Conditions and Microencapsulation Technique for Stabilizing Anthocyanins and Polyphenols from Fruit Materials

Creator:: Wang, Wenjie
Abstract:: The objectives of this research were to investigate the optimal conditions for anthocyanins extraction from different anthocyanin rich fruit and to develop microencapsulation formulation for improving stability of anthocyanin extracts. In the extraction optimization study, two extraction methods, "conventional solvent extraction (CE)" and "ultrasound-assisted extraction (UE)" for three different anthocyanin-rich...
Resource Type:: Masters Thesis
Full Text:: the optimal level for each factor (P< 0.05). The extraction optimization was determined based

Selective oxidation of biological matrices for subsequent peroxidase and peroxidase-based quantitative analyses

Creator:: Jiang, Shu
Abstract:: Hydrogen peroxide quantification is of broad interest due to the common use of hydrogen peroxide as an oxidizing agent in industrial processing and laboratory research. Hydrogen peroxide assays are also of general importance for biological studies aimed at understanding the role of in situ generated reactive oxygen species. In the...
Resource Type:: Masters Thesis
Full Text:: calibration curve generated by using ABTS•+ treated GPE sample was not significantly different (p>0.05) from

Impact of Pre-fermentation Cold Soak Conditions on Pinot Noir Wine Quality

Creator:: Fu, Mengying
Abstract:: Wine volatile composition is one of the most important components of wine quality, and it is greatly affected by multiple factors, including grape variety, viticultural practices, and winemaking procedures. Pre-fermentation cold soak is one of the winemaking techniques widely undertaken by winemakers to modify their red wine quality. Imposing a...
Resource Type:: Masters Thesis
Full Text:: -methyl-1-butanol (active amyl alcohol), and phenyl ethyl alcohol (Nykänen 1986, Ferreira, Lopez et al

Composition of Pinot noir Wines Produced from Different Crop Levels

Creator:: Li, Jingwen
Abstract:: The production of high-quality wine is an important target for wineries worldwide, and low crop level (yield) has been one vineyard management criterion long believed to achieve wine quality. Low yields are most often achieved by removing clusters from the grapevine. Some studies show that cluster thinning can enhance grape...
Resource Type:: Masters Thesis
Full Text:: , 1990; P. J. Williams, Strauss, Wilson, & Massy-Westropp, 1982). This high proportion of bound

ScholarsArchive@OSU

Use of Organoleptic Methodologies to Evaluate Wine Oligosaccharides and Wines made from Grapevine Red Blotch Virus Positive Vines Subjected to Various Vineyard Management Practices

Interactions between Oenococcus oeni and Brettanomyces bruxellensis during winemaking and consequences for wine quality

Influence of Biotic and Abiotic Factors on Yeast Communities during Cold Soak and the Consequences for Wine Aroma

The Influence of Vineyard and Winery Nitrogen Supplementation on Chardonnay and Pinot Noir Winemaking and Wine Quality

Exploration into the Influence of Malolactic Fermentation Parameters and Pre-fermentation Juice Treatment on Chardonnay Mouthfeel

Effect of lactic acid bacteria growth on Brettanomyces bruxellensis growth and production of ethylphenols

Investigation of Optimal Extraction Conditions and Microencapsulation Technique for Stabilizing Anthocyanins and Polyphenols from Fruit Materials

Selective oxidation of biological matrices for subsequent peroxidase and peroxidase-based quantitative analyses

Impact of Pre-fermentation Cold Soak Conditions on Pinot Noir Wine Quality

Composition of Pinot noir Wines Produced from Different Crop Levels

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