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 40
... colonies of interest is cut out of the Petri plate and placed on the cover slip, allowing only the colonies to adhere to the cover slip. The cover glass is then placed upside-down on the ring with the agar cube in the space created by ...
... colonies of interest is cut out of the Petri plate and placed on the cover slip, allowing only the colonies to adhere to the cover slip. The cover glass is then placed upside-down on the ring with the agar cube in the space created by ...
Page 49
... colonies arising from single or from linked cells (Fig. 12 a-d) Determining microbial concentration in musts and wines There are a large number of methods cited in the literature that could be consid. ered for use in enology to estimate ...
... colonies arising from single or from linked cells (Fig. 12 a-d) Determining microbial concentration in musts and wines There are a large number of methods cited in the literature that could be consid. ered for use in enology to estimate ...
Page 50
... colonies that appear on the right were generated from cells that were 344 and 573 microns, respectively, from the center of the large group of cells. The sequence of photos c) and d) shou, the confluence of colonies after 48 hours of ...
... colonies that appear on the right were generated from cells that were 344 and 573 microns, respectively, from the center of the large group of cells. The sequence of photos c) and d) shou, the confluence of colonies after 48 hours of ...
Page 51
... colonies on solid or liquid medium in Petri plate, after placing a previously inoculated membrane filter on the ... colonies grown on a membrane filter; C - counting colonies grown on an agar medium; D - counting cells collected on a ...
... colonies on solid or liquid medium in Petri plate, after placing a previously inoculated membrane filter on the ... colonies grown on a membrane filter; C - counting colonies grown on an agar medium; D - counting cells collected on a ...
Page 61
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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