Download or read book A Study of Brettanomyces and Dekkera in Synthetic Wine Media written by David Gordon Lattin and published by . This book was released on 1985 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, SIld disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna and broader dissemination. tional publishing house to assure improved service Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 30 (thesis year 1985) a total of 12,400 theses titles from 26 Canadian and 186 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work.
Download or read book A Survey of Brettanomyces Dekkera Strains for Differences in Aroma Production written by Elizabeth Anne Albino and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Brettanomyces bruxellensis is a yeast known to cause widespread spoilage in the wine industry. However, the presence of Brettanomyces character in wine is not universally disliked or feared- some winemakers believe there are Brettanomyces strains which contribute positively to the complexity of a wine, without imparting a negative character that reduces wine saleability. In this study, 95 Brettanomyces/Dekkera isolates of global origin were screened, with the goal of determining the validity of this belief. Strains were grown in minimal media supplemented with the aromatic amino acids phenylalanine, tryptophan, and tyrosine. After a 14-day incubation period, strains were scored for intensity, likeability, and types of aromas perceived. Using these data, 16 strains were selected for growth in wine, to determine strain viability in wine, as well as aromatic compound production. Due to loss of viability in wine and no significant differences in aroma perception, an 11-strain subset was regrown in minimal media, this time including a treatment supplemented with both amino acids and the phenolic precursors to 4-EP, 4-EG, and 4-EC. Production of volatile compounds was analyzed using static headspace solid-phase microextraction (SPME) coupled with gas chromatography-mass spectrometry (GC/MS). Twenty-three compounds were tentatively identified as Brettanomyces metabolites, including 10 not previously associated with Brettanomyces. Strain effect was significant with all compounds except nerolidol. Absence of 4-EP/4-EG was correlated with poor growth. Comparisons of sensory descriptors and compound production by SPME showed no consistent correlations with the possible exception of floral aromas and phenylalanine byproducts. Fruity aroma perception did not correlate with ethyl ester production, even though these esters are known to have fruity aromas. Rotten/putrid aromas may have been related to the high fatty acid production in strain 2092, but other strains showing similar levels of fatty acids were not perceived as high in rotten/putrid character. It is suspected that masking and/or enhancing sensory effects, or sensitivity of the SPME protocol, were responsible for the lack of clearly correlated compounds and aromas. Strains 605, 2091, 2404, 2408 and 2402 are recommended for further investigation under enological conditions, to assess their viability as commercial strains.
Download or read book The Effect of Amino Nitrogen on Brettanomyces Dekkera Growth and Aroma Production written by Bradford Scott Kitson and published by . This book was released on 2007 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wine Microbiology written by Kenneth C. Fugelsang and published by Рипол Классик. This book was released on 2007 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Post Fermentation and Distillation Technology written by Matteo Bordiga and published by CRC Press. This book was released on 2017-12-15 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: While most wine and spirits books focus on vineyard and crop management or fermentation and distillation processes, few address critical post process aspects of stabilization, aging, and spoilage. This book serves as a comprehensive source of information on post-fermentation and -distillation technology applied to wine, beer, vinegar and distillates in a broad spectrum. Post-Fermentation and -Distillation Technology: Stabilization, Aging, and Spoilage thoroughly describes all of the operations related to these products after the fermentation or distillation steps, focusing on the complex issues related to their stabilization, aging, and spoilage. The final product must be stable against microbial activity as well as undesirable chemical and physical chemical reactions that occur in the bottle. For example, clarity, stability, compositional adjustment, style development and packaging represent the five goals of "finishing" a wine. Concerning the visual defects associated with spoilage, it is crucial that wine at the point of consumption not be cloudy or contain any haze or precipitate, especially white wines. Similarly, it is also important to prevent unwanted microbial growth from occurring in the wine after the primary fermentation is complete, affecting the flavor and aroma profile in unpredicted ways. The book addresses all of these issues and more. Moreover, the discussion also involves beer, vinegar and distillates, giving this book a novel and interesting approach. The book combines referenced research with practical applications and case studies of novel technologies such as square barrels, synthetic closures, and Tetra Pak®.
Download or read book Red Wine Technology written by Antonio Morata and published by Academic Press. This book was released on 2018-10-29 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Red Wine Technology is a solutions-based approach on the challenges associated with red wine production. It focuses on the technology and biotechnology of red wines, and is ideal for anyone who needs a quick reference on novel ways to increase and improve overall red wine production and innovation. The book provides emerging trends in modern enology, including molecular tools for wine quality and analysis. It includes sections on new ways of maceration extraction, alternative microorganisms for alcoholic fermentation, and malolactic fermentation. Recent studies and technological advancements to improve grape maturity and production are also presented, along with tactics to control PH level. This book is an essential resource for wine producers, researchers, practitioners, technologists and students. Winner of the OIV Award 2019 (Category: Enology), International Organization of Vine and Wine Provides innovative technologies to improve maceration and color/tannin extraction, which influences color stability due to the formation of pyranoanthocyanins and polymeric pigments Contains deep evaluations of barrel ageing as well as new alternatives such as microoxigenation, chips, and biological ageing on lees Explores emerging biotechnologies for red wine fermentation including the use of non-Saccharomyces yeasts and yeast-bacteria coinoculations, which have effects in wine aroma and sensory quality, and also control spoilage microorganisms
Download or read book Evaluation of DNA Fingerprinting Methods for Identification of Brettanomyces Dekkera Yeasts from Wines written by Craig Michael Mitrakul and published by . This book was released on 1997 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Managing Wine Quality written by Andrew G. Reynolds and published by Woodhead Publishing. This book was released on 2021-12-03 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt: Managing Wine Quality, Volume 2: Oenology and Wine Quality, Second Edition, brings together authoritative contributions from experts across the world’s winemaking regions who cover yeasts, fermentation, enzymes, and stabilization, amongst other topics. A new chapter covers, in detail, extraction technologies and wine quality. Other sections cover the management of wine sensory quality, with new chapters covering the management of fortified wines, of Botrytized wines, and of wines produced from dried grapes. In addition, an updated section on insect taints in wine has been widened to cover all insects. With a focus on recent studies, advanced methods, and a look to future technologies, this fully updated edition is an essential reference for anyone involved in viticulture and oenology who wants to explore new methods, understand different approaches, and refine existing practices. Reviews our current understanding of yeast and fermentation management, as well as the effects of aging on wine quality Details alternatives to cork in bottle closing and the latest developments in the stabilization and clarification of wines Includes new chapters covering extraction technologies for wine quality and on managing the quality of a wide range of wine types, including fortified and Botryized wines Provides extensively expanded coverage of insect taints and their effects on wine quality
Download or read book Wine Microbiology written by Claudio Delfini and published by CRC Press. This book was released on 2001-03-23 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 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 wine yeast and bacteria used to track wine spoilage and related problems.
Download or read book Wine Chemistry and Biochemistry written by M. Victoria Moreno-Arribas and published by Springer Science & Business Media. This book was released on 2008-11-06 with total page 729 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to describe chemical and biochemical aspects of winemaking that are currently being researched. The authors have selected the very best experts for each of the areas. The first part of the book summarizes the most important aspects of winemaking technology and microbiology. The second most extensive part deals with the different groups of compounds, how these are modified during the various steps of the production process, and how they affect the wine quality, sensorial aspects, and physiological activity, etc. The third section describes undesirable alterations of wines, including those affecting quality and food safety. Finally, the treatment of data will be considered, an aspect which has not yet been tackled in any other book on enology. In this chapter, the authors not only explain the tools available for analytical data processing, but also indicate the most appropriate treatment to apply, depending on the information required, illustrating with examples throughout the chapter from enological literature.
Download or read book Principles and Practices of Winemaking written by Roger B. Boulton and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: This essential text and reference offers a complete guide to winemaking. The authors, all well-known experts in their field, concentrate on the process of wine production, stressing the chemistry, biochemistry, microbiology and underlying science of enology. They present in-depth discussion of every aspect of the wine production process, from the selection of grapes and preparation of the must and the juice, through aging, bottling and storage of finished wines. Novices and experienced winemakers alike will find this clearly written and expertly crafted book an indispensable source of practical instruction and information.
Download or read book Effect of Lactic Acid Bacteria Growth on Brettanomyces Bruxellensis Growth and Production of Ethylphenols written by Stuart C. Chescheir and published by . This book was released on 2014 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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, clove smell) by decarboxylation and subsequent reductions of the hydroxycinnamic acids p-coumaric acid and ferulic acid. Hydroxycinnamic acids are naturally present in grapes and wine and are also often present in the form of tartaric acid- hydroxycinnamic acid esters which B. bruxellensis cannot utilize. The first objective of this study was therefore to investigate the ability of other wine microorganisms to hydrolyze tartaric acid bound hydroxycinnamic acids and the impact this may have on volatile phenol production by Brettanomyces. Of the thirty five strains of wine microorganisms tested only one, the commercial strain O. oeni VFO, hydrolyzed tartaric acid bound hydroxycinnamic acids in wine and increased the concentrations of the free hydroxycinnamic acids p- coumaric acid and ferulic acid. Because of this, B. bruxellensis produced significantly higher concentrations of 4-ethylphenol and 4-ethylguiaciol when growing in wine where VFO had conducted the malolactic fermentation. In contrast, wines that underwent MLF with O. oeni Alpha or VP41 contained similar 4-EP and 4-EG concentrations to the control. A subsequent study investigated interactions between the wine spoilage yeast Brettanomyces bruxellensis and wine lactic acid bacteria (LAB) and the impact on Brettanomyces growth and volatile phenol production. Studies in acidic grape juice (AGJ) broth (pH 3.50, 5% ethanol) demonstrated that growth of O. oeni could inhibit Brettanomyces growth in a strain dependent manner. Production of 4-ethyphenol was also delayed and reduced in a strain dependent manner. For example, in the control a maximum of 19 mg/L 4-EP was produced by B. bruxellensis UCD-2049 while during growth in media where VP41 had previously grown only 7.9 mg/L 4-EP was produced. When B. bruxellensis was inoculated into Pinot noir wine where malolactic fermentation (MLF) had been performed by O. oeni VFO, populations of B. bruxellensis quickly decreased below detectable levels and did not recover during the course of the experiment (50 days). In contrast, when B. bruxellensis UCD-2049 was inoculated into Pinot noir wine where Pediococcus damnosus OW2 had previously grown populations did not decrease and growth occurred in a similar manner to the control. The reason for this decrease in population was further explored by inoculating B. bruxellensis into AGJ broth (pH 3.50) where there had been previous growth of O. oeni Alpha or VP41. In half the treatments the O. oeni were removed by sterile filtration prior to Brettanomyces inoculation. Although there was delayed growth of B. bruxellensis in media where O. oeni had previously grown there was no significant difference between growth in sterile filtered and non-sterile filtered treatments. The relief of inhibition by sterile filtration suggests that neither nutrient depletion nor the production of an extracellular inhibitory compound by O. oeni were the causes of Brettanomyces inhibition, as sterile filtration would not have impacted these. Future work in this field should include screening a larger and more diverse group of wine microorganisms for the ability to hydrolyze tartaric ester bound hydroxycinnamic acids. This should include non-Saccharomyces yeast such as Kloeckera that are known to be present during early fermentation as well as spoilage bacteria such as Lactobacillus. In addition, the inhibition of B. bruxellensis should be explored further by testing O. oeni against a larger number of B. bruxellensis strains and additional mechanisms of inhibition should be investigated.
Download or read book Advances in Grape and Wine Biotechnology written by Antonio Morata and published by BoD – Books on Demand. This book was released on 2019-09-04 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Grape and Wine Biotechnology is a collection of fifteen chapters that addresses different issues related to the technological and biotechnological management of vineyards and winemaking. It focuses on recent advances in the field of viticulture with interesting topics such as the development of a microvine model for research purposes, the mechanisms of cultivar adaptation and evolution in a climate change scenario, and the consequences of vine water deficit on yield components. Other topics include the metabolic profiling of different Saccharomyces and non-Saccharomyces yeast species and their contribution in modulating the sensory quality of wines produced in warm regions, the use of new natural and sustainable fining agents, and available physical methods to reduce alcohol content. This volume will be of great interest to researchers and vine or wine professionals.
Download or read book Grapes and Wines written by António M. Jordão and published by BoD – Books on Demand. This book was released on 2018-02-28 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Grapes and Wines: Advances in Production, Processing, Analysis, and Valorization" intends to provide to the reader a comprehensive overview of the current state-of-the-art and different perspectives regarding the most recent knowledge related to grape and wine production. Thus, this book is composed of three different general sections: (1) Viticulture and Environmental Conditions, (2) Wine Production and Characterization, and (3) Economic Analysis and Valorization of Wine Products. Inside these 3 general sections, 16 different chapters provide current research on different topics of recent advances on production, processing, analysis, and valorization of grapes and wines. All chapters are written by a group of international researchers, in order to provide up-to-date reviews, overviews, and summaries of current research on the different dimensions of grape and wine production. This book is not only intended for technicians actively engaged in the field but also for students attending technical schools and/or universities and other professionals that might be interested in reading and learning about some fascinating areas of grape and wine research.
Download or read book Wine Fermentation written by Harald Claus and published by MDPI. This book was released on 2019-03-28 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wineries are facing new challenges due to actual market demands for the creation of products exhibiting more particular flavors. In addition, climate change has lead to the requirement for grape varieties with specific features, such as convenient maturation times, enhanced tolerance towards dryness, osmotic stress, and resistance against plant-pathogens. The next generation of yeast starter cultures should produce wines with an appealing sensory profile and less alcohol. This Special Issue comprises actual studies addressing some of the problems and solutions for the environmental, technical, and consumer challenges of wine making today: Development of sophisticated mass spectroscopic methods enable the identification of the major metabolite spectrum of grapes/wine and deliver detailed insights in terroir and yeast-specific traits;Knowledge of the origin and reactions of reductive sulphur compounds facilitates the avoidance of unpleasant wine odors;Innovative physical–chemical treatments support effective and sustainable color extraction from red grape varieties;Enological enzymes from yeasts used directly or in the form of starter cultures are promising tools to increase the juice yields, color intensity, and aroma of wine;Natural and artificial Saccharomyces hybrids as well as collections of adapted wild isolates from various ecological niches will extend winemakers repertoire, allowing individual fermentations;Exact process control of wine fermentations by convenient computer programs will guarantee consistently high product quality.
Download or read book Yeast written by Antonio Morata and published by BoD – Books on Demand. This book was released on 2017-11-08 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Yeast - Industrial Applications is a book that covers applications and utilities of yeasts in food, chemical, energy, and environmental industries collected in 12 chapters. The use of yeasts in the production of metabolites, enzymatic applications, fermented foods, microorganism controls, bioethanol production, and bioremediation of contaminated environments is covered showing results, methodologies, and processes and describing the specific role of yeasts in them. The traditional yeast Saccharomyces cerevisiae is complemented in many applications with the use of less known non-Saccharomyces yeasts that now are being used extensively in industry. This book compiles the experience and know-how of researchers and professors from international universities and research centers.
