Wine Microbiology: Science and TechnologyThis volume applies an inductive experimental approach to recognize, control and resolve the variables that effect the wine-making process and the quality of the final product - focusing on the grape variety-yeast interaction controversy. It contains over 300 drawings, photographs and photomicrographs that illustrate the diagnostic morphology of wi |
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Page 8
... occurs remains largely unknown. In other words, the mechanisms yeast employ to carry out this "aromatic work" has yet to be ... occur with other varietals. Unraveling the biochemical and molecular mechanisms in yeast which result in the ...
... occurs remains largely unknown. In other words, the mechanisms yeast employ to carry out this "aromatic work" has yet to be ... occur with other varietals. Unraveling the biochemical and molecular mechanisms in yeast which result in the ...
Page 40
... occur during colony growth. The direct agar medium observation technique is easier to carry out. A slide is covered ... occurred, the agar medium on the underside is scraped off with a razor-blade to facilitate microscopic observation ...
... occur during colony growth. The direct agar medium observation technique is easier to carry out. A slide is covered ... occurred, the agar medium on the underside is scraped off with a razor-blade to facilitate microscopic observation ...
Page 44
... occurs, for example, with cells with cracked walls, even though their shape is intact. Cracked walls can result from osmotic shock or rapid depression, or can occur in a cell population that has been resting at the bottom of a bottle ...
... occurs, for example, with cells with cracked walls, even though their shape is intact. Cracked walls can result from osmotic shock or rapid depression, or can occur in a cell population that has been resting at the bottom of a bottle ...
Page 50
... occur with a single colony) and a vicinal cell grou, and coalesce into one budding cell, or from a group of hudding cells. In the colony. latter cases the colony will develop at a more rapid rate than in the former case. Fig. 12c, d. A ...
... occur with a single colony) and a vicinal cell grou, and coalesce into one budding cell, or from a group of hudding cells. In the colony. latter cases the colony will develop at a more rapid rate than in the former case. Fig. 12c, d. A ...
Page 57
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Contents
17 | |
27 | |
35 | |
49 | |
Sterilization techniques | 85 |
The antiseptic effect of sulfur dioxide | 99 |
Correlation between pH buffer power oxidationreduction potential microbiological stabilization and the acid taste of wine | 125 |
Alternative techniques to the use of sulfur dioxide for microbiological stabilization | 143 |
Microbiological monitoring of must and wine | 283 |
The use of selected yeast strains | 291 |
The formation of organoleptically important metabolites | 327 |
The production of acetic acid by yeasts | 339 |
Biological degradation of malic acid | 357 |
Microbiological control of concentrated musts and sulfured musts | 379 |
The microbiological control of wine during storage | 389 |
Methodology for the microbiological stabilization of musts and wines | 409 |
Cleansing and sanitation | 157 |
Taxonomy biology cytology and morphology of wineassociated yeasts | 167 |
Isolation selection and purification of wine yeasts | 193 |
Oenological characteristics of selected yeast strains and their genetic improvement | 219 |
Current and prospective microbiological topics in enology | 241 |
The metabolism of sugars and nitrogen by yeast | 253 |
The oxygen requirement for wine yeast | 269 |
Microbiological stabilization of wine through thermal treatment Pasteurization and hot bottling | 425 |
Microbiological stabilization through filtration | 433 |
Microscopic and chemical assays used for the identification of sediment Techniques used to determine a wines propensity to develop turbidity | 453 |
Bibliography | 461 |
Index | 483 |
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Common terms and phrases
acetaldehyde acetic acid bacteria activity addition agar alcoholic fermentation antiseptic aromatic bottling cells/mL characteristics clarified colonies color compounds concentration considered containing decrease degradation Delfini diluted dose effect enological enzymes ethyl eyepiece factors fatty acids favor filter filtration formation free-run genetic glucose glycerol grape growth H2SO heat hydrogen increase incubation inhibition initial inoculated inoculum juice lactic acid bacteria Leuconostoc liquid malic acid malolactic bacteria malolactic fermentation medium membrane mentation metabolic mg/L microbial microbiological stabilization micron microorganisms microscope molecular SO2 º º occur odor organoleptic oxidation oxygen Pasteur Petri plate phase preparation presence produced pyruvic acid quantity resistant Saccharomyces cerevisiae sample Schizosaccharomyces selected yeast strains slide solution species spoilage spores starter culture sterile sugar sulfur dioxide surface suspension Table tank tartaric acid techniques temperature tion tive treatment vegetative cells vinification volatile acidity wine yeasts yeast cells