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Showing 1 to 20 of 33 for “"grape juice"”.
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Evaluation of film, jacket and internal cooling during fermentation of grape juice
The work described in this thesis deals with analytical and experimental aspects of water-film cooling, jacket cooling and internal cooling, which are the three predominant types of fermentation cooling found in the South African wine industry. During the past decades questions were constantly …
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Consumer Willingness-to-pay for Concord Grape Juice Treated by High-pressure Processing and Pulsed Electric Field
The New York Concord grape industry, the second-largest Concord grape producing statein the country, makes enormous contributions to the labor market and has huge economic impacts in the state. However, change of consumers’ preferences, decreasing consumption of carbohydrate-rich juice, and …
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Methoxypyrazine removal in grape juice: Development of a removal system using odorant and pheromone binding proteins coupled with bentonite fining
… when they are processed with the grapes, resulting in wines containing a taint. The main methoxypyrazine associated with this taint is 3-isopropyl-2-methoxypyrazine (IPMP). The wines are described as having aroma and flavours of peanut butter, peanut shells, asparagus and earthy …
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Identification of yeast genes involved in sauvignon blanc aroma development
The grape variety Sauvignon Blanc (SB) is the flagship of New Zealand’s wine industry and accounted for over 75 % of the value of total wine exports in 2008. Two volatile thiols, 3-mercaptohexan-1-ol (3MH) and 3-mercaptohexyl-acetate (3MHA), reminiscent of grapefruit and passion fruit respectively, …
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Breast Cancer Inhibition by Grape Constituents
… breast cancer preventive properties. Concord grapes are rich in polyphenolic chemicals and anthocyanin pigments that may have biological properties which could suppress cancer such as having antioxidant, antiproliferative, and proapoptotic actions. To determine the potential breast cancer …
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Efeito do suco de uva tinto integral na pressão arterial de repouso e na capacidade hipotensora em resposta a uma sessão de exercício físico.
… the foods with greater hypotensive effect is the grape and grape and physical exercise have similar mechanisms involved in improved levels of PA. But even before this, it is unclear to associate exercise wit h supplementation of integral red grape juice decrease resting BP and maintains or …
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Antibacterial Activity of Hydrogen Peroxide Against Escherichia Coli O157:H7 and Salmonella Spp. in Fruit Juices, Both Alone and in Combination With Organic Acids
… of hydrogen peroxide treatments in four fruit juices was determined. Preservative free apple cider, white grape, and purple grape juice were inoculated with ~ 6.4 log CFU/ml of a five strain, acid adapted, nalidixic acid resistant E. coli O157:H7 cocktail. Orange juice was inoculated with a …
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Survival of Listeria monocytogenes in Fruit Juices During Refrigerated and Temperature-Abusive Storage
… of Listeria monocytogenes in apple, orange, red grape, and white grape juice was evaluated. A six-strain cocktail of L. monocytogenes was used to inoculate (approx. 7 log cfu/ml) fruit juices, which were stored at 4, 10 and 24°C for up to 61 days. Inoculated red grape juice was stored for up to 5 …
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La influencia de la tecnología de la vinificación en la microbiología y el desarrollo de la fermentación alcohólica
… vintages since 1994 to 1998, using white grape juice of Viura variety from La Rioja (Spain). The clarification treatments used were clarification by settling and clarification by vacuum filtering. The resources studied: Nitrogen addition (diammonium phosphate and commercial activator with …
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Land treatment of grape-processing effluents near Robertson, Western Cape
… generated by distilling, wine making and grape juice production in the Western Cape. Primary settling and treatment in aerobic and anaerobic lagoons typically precede disposal to land. Land treatment can effectively remove COD and also benefit the soil by increasing organic matter, cation …
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Pervaporation applications in food processing
… of pervaporation to the manufacture of grape juice essence and the extraction of diacetyl from aqueous solutions. The main findings of this study were: (1) It is indeed possible to manufacture grape juice essence by pervaporation. Starting with a 150x fold essence, it was possible to …
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The use of isothermal membrane distillation in tomato processing
… in the food commenced with the concentration of grape juice for winemaking. Although IMD can concentrate grape juice up to 70% total solids level, its use is limited to clarified juices due to membrane materials currently available. Tomato juice contains a considerable amount of suspended solids …
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The development and evolution of Saccharomyces interspecific hybrids for improved, industry relevant, phenotypes
… closely related to S. cerevisiae were assessed. Grape juice fermentation by hybrids from crosses between a commercial S. cerevisiae wine yeast and either Saccharomyces paradoxus or Saccharomyces kudriavzevii showed that the hybrids had robust fermentation properties and produced wines with …
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The Effects of the Storage Conditions of the Juice and the Effects of Nutrient Supplementation on Wine Fermentation
Storage conditions of Concord grape juice prior to fermentation and types of supplementation during fermentation were studied. Two batches of juice were stored, one at ambient temperature and one at 4.4°C, and were then fermented using four different nitrogen supplementation methods: a control with …
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Efficacy of Ultraviolet Radiation to Control Lactic Acid Bacteria in Wine Must
… species of LAB were introduced into white grape juice adjusted for brix and pH to match that of wine must commonly found in the Yakima Valley American Viticultural Area. The mixture was then agitated and allowed time to evenly distribute the bacteria throughout the juice. The juice was sent …
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Bioprospecting the Regional Diversity of Australian Wine Microbiota
Like all plants, grapevines are host to a plethora of microorganisms. During the winemaking process, the microflora of the grape surface can be transferred into the fermentation environment. While the yeast Saccharomyces cerevisiae is the main driver of alcoholic fermentation during wine …
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Rapid and high-resolution analysis of winemaking yeasts using MALDI-TOF MS : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
… diverse and dynamic process in which the grape sugar is converted into ethanol, CO2 and other aromatic compounds by yeasts. Saccharomyces cerevisiae is the main species used for wine production, whereas the contribution of non-Saccharomyces yeasts to the distinctiveness of wine was not …
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Brain Bioavailability Of Polyphenols: Implications For Delivery Of Brain Health Benefits
… polyphenol bioavailability from a `Standardized Grape Polyphenol' (grape seed extract, Concord grape juice and resveratrol). Additionally, this thesis will provide novel evidence on plasma pharmacokinetics and regional brain distribution of polyphenol metabolites from apple/grape seed and …
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Discriminant analysis : a review of its application to the classificationof grape cultivars
… function for discriminating between five grape cultivars with a view to determine the cultivar of an unknown grape juice. In order to discriminate between the five grape cultivars various multivariate statistical techniques, such as principal component analysis, cluster analysis, …
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Viticultural techniques of canopy management to mitigate the effects of global warming
… the effects of different cultural techniques on grape yield components and fruit quality. In particular, within the climate change scenario, their effectiveness of delaying grape technological ripening and improving the anthocyanins-to-sugar ratio was the main priority of the research. All the …
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