Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"white wine"”.
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Evaluating Winemaking Applications of Ultrafiltration
… potential applications of ultrafiltration in the wine industry and wine science have not been extensively explored. Therefore, this PhD project investigates the feasibility of applying UF technology in winemaking to improve sensory attributes such as colour, texture, mouthfeel, aroma, and flavour, …
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Effects of Capture and Return on Chardonnay (Vitis vinifera L.) Fermentation Volatiles
… fermentation volatiles, as a means of improving white wine quality, was evaluated. Twenty-three aroma-active volatiles including ethyl esters, acetate esters, fusel alcohols, and fatty acids, were quantified using head-space solid phase microextraction with GC/MS. Volatile analysis of …
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Papsak consumption and problem drinking amongst farm workers in the rural Western Cape : prevalence and risk factors
… the ease of availability of cheap, low quality white wine, typically packaged in foil bags (papsakke). A process is underway to regulate papsakke out of the market. However, limited research has been conducted on the use and impact of papsakke. [Aims and objectives] This study aims to determine …
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Effects of Hydroxycinnamates and Exogenous Yeast Assimilable Nitrogen on Cider Aroma and Fermentation Performance
… content of some cider apples far exceeds that of white wine, however most cider fermentation practices are directly taken from white winemaking, not accounting for effects of high concentrations of phenolic compounds on yeast fermentation. The objective of this study was to determine the impact of …
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La influencia de la tecnología de la vinificación en la microbiología y el desarrollo de la fermentación alcohólica
The enological practices used on white wine elaboration introduce some advantages and disadvantages. In order to avoid negative effects some applicable resources have been developed to assure a correct fermentation. The present Thesis studies the effects of these applicable resources on the natural …
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Impact of Juice Clarification Processes on Chemical Composition of Hard Cider
… is often associated with sulfur off-aromas in white wine production; therefore, pre-fermentation juice clarification is an important and routine step in white winemaking practice. However, cider makers are often reluctant to clarify juice pre-fermentation due to beliefs that pre-fermentation …
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Precursors to the potent odorant wine lactone.
… analysis of menthiafolic acid, a precursor to wine lactone in wine. (R)-Menthiafolic acid was synthesised and then taken through acid hydrolyses to confirm its conversion to wine lactone under wine-like conditions and to determine the chirality of the resultant product. A Gas Chromatography/ …
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Closed-loop insulin delivery in adults with type 1 diabetes
… 100g-carbohydrate meal and (mean 564 ml) white wine. The third study evaluated 24 hours of closed-loop in 12 pregnant women (mean age 32.9 years, 19 to 23 weeks gestation, HbA1c 6.4%) during normal daily activities, including low and moderate intensity exercise. Activity and glucose levels …
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Effetto pro-ossidante e pro-infiammatorio degli ossisteroli in cellule intestinali: attività modulatoria della frazione fenolica del vino
… cellular process such as inflammation. Wine accounts for a very high proportion of phenolic compounds intake in the Mediterranean diet; typically a glass of red wine contains about 100 mg of compounds generally called polyphenols. We investigated the ability of two wine phenolic …
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Impact of agronomical and technological factors and the oxidative protection of the matrix on polysulfide formation and atypical ageing in wine
Wine is an alcoholic beverage which has been important in human nutrition for centuries. Oenological research is expanding, focusing on different aspects, including sensory science, wine technology and wine chemistry. The latter aims to gain more understanding of the chemical processes involved in …
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Alcohol Use As A Precipitant And Comorbidity In Primary Headache
… Twenty-eight percent of individuals endorsed red wine as a trigger, 14% endorsed spirits, 12% endorsed white wine, and 10% endorsed beer or sparkling wine; however difference in endorsement rates was not significantly different (p = .06). The precipitating effect in relation to frequency and …
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Electrochemical determination of gallic acid in food matrices using novel materials.
… In this study, the detection of GA in red and white wines was achieved using CV, through the development of carbon-based working electrodes modified with graphene oxide nanoparticles and other metal oxide nanoparticles. The synthesised metal oxide nanoparticles were characterised using scanning …
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Chemistry of hydroxycinnamate esters and their role as precursors to Dekkera produced off-flavour in wine.
The potential for malodour in wine caused by the accumulation of ethylphenols has been widely studied with respect to the breakdown of the hydroxycinnamic acids, p-coumaric and ferulic acid, by D. bruxellensis. The presence of esterified hydroxycinnamate conjugates in grapes and wine is well …