Download or read book Production of Sulfur Dioxide and Sulfur Dioxide Binding Compounds by Saccharomyces Cerevisiae During the Alcoholic Fermentation and the Impact on Wine Lactic Acid Bacteria written by Allison L. O'Neil and published by . This book was released on 2010 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Malolactic fermentation (MLF) is important in the production of wines as it reduces acidity through the conversion of malic acid to lactic acid. However, successful MLF can be difficult to achieve due to yeast antagonism of the bacterium responsible for the secondary fermentation, Oenococcus oeni. In particular, yeast produced sulfur dioxide (SO2) has been implicated in causing problematic MLFs. SO2 can exist in a free or bound form with the free form thought to have the antimicrobial action. However, some recent studies have demonstrated bacterial inhibition in wine when no free SO2 was present indicating that bound SO2 was responsible. Despite this, very little is known regarding the toxicity of the different forms of bound SO2 and how they may impact the MLF. Therefore, the purpose of this research was to investigate the production of SO2, and the major SO2 binding compounds, acetaldehyde, pyruvic acid, and [alpha]-ketoglutaric acid, by various commercial wine yeast strains and the impact these compounds have on the MLF. Fermentations were conducted in a synthetic grape juice and Pinot gris must where viable yeast cell growth, SO2, acetaldehyde, pyruvic acid, and [alpha]-ketoglutaric acid were measured during the alcoholic fermentation. At weekly intervals samples were taken from the fermentations, sterile filtered, and inoculated with O. oeni strain VFO to induce MLF. Progress of MLF was monitored by measuring malic acid and bacterial viable cell counts. Results show that there were significant differences between the amount of SO2, acetaldehyde, and pyruvic acid produced by the various yeast strains but not [alpha]-ketoglutaric acid. Some yeast strains, such as FX10, S102, F15, and M69, produced significantly higher SO2 concentrations than other yeast strains and O. oeni viability decreased rapidly when inoculated into these wines. Very little if any free SO2 was measured indicating that bound SO2 and not free SO2 was responsible for bacterial inhibition. Acetaldehyde bound SO2 was the dominant species of bound SO2 found at almost all time points of the alcoholic fermentation indicating that inhibition of MLF by bound SO2 was due to acetaldehyde bound SO2. To further elucidate the role of bound SO2 in the inhibition of wine lactic acid bacteria (LAB), growth studies on the impact of O. oeni strain VFO, Pediococcus parvulus, P. damnosus, and Lactobacillus hilgardii in media containing free SO2 or acetaldehyde and pyruvic acid bound SO2 at two different pHs were performed. In general, inhibition was greater at pH 3.5 than at 3.7 and only P. damnosus demonstrated some tolerance to SO2. Acetaldehyde bound SO2 appeared to be more inhibitory than either pyruvic acid bound SO2 or a combination of acetaldehyde and pyruvic acid bound SO2. Degradation of acetaldehyde appeared to stimulate the growth of O. oeni VFO and Lb. hilgardii at pH 3.5 but not at 3.7. Overall, a reduction in acetaldehyde and pyruvic acid as well as SO2 bound acetaldehyde and pyruvic acid was observed for all LAB tested, with the exception of O. oeni VFO which did not show a decrease in SO2 bound pyruvic acid at pH 3.5. Bacteria were inhibited in media containing acetaldehyde bound SO2 and pyruvic acid bound SO2 even though a decrease in SO2 bound acetaldehyde and pyruvic acid was observed. This suggests that the decrease of the compound bound to SO2 may have lead to inhibition by the subsequently released free SO2.
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 Handbook of Alcoholic Beverages 2 Volume Set written by Alan J. Buglass and published by John Wiley & Sons. This book was released on 2011-02-14 with total page 1207 pages. Available in PDF, EPUB and Kindle. Book excerpt: HANDBOOK OF ALCOHOLIC BEVERAGES A comprehensive two-volume set that describes the science and technology involved in the production and analysis of alcoholic beverages HANDBOOK OF ALCOHOLIC BEVERAGES Technical, Analytical and Nutritional Aspects At the heart of all alcoholic beverages is the process of fermentation, particularly alcoholic fermentation, whereby sugars are converted to ethanol and many other minor products. The Handbook of Alcoholic Beverages tracks the major fermentation process, and the major chemical, physical and technical processes that accompany the production of the world’s most familiar alcoholic drinks. Indigenous beverages and small-scale production are also covered to a significant extent. The overall approach is multidisciplinary, reflecting the true nature of the subject. Thus, aspects of biochemistry, biology (including microbiology), chemistry, health science, nutrition, physics and technology are all necessarily involved, but the emphasis is on chemistry in many areas of the book. Emphasis is also on more recent developments and innovations, but there is sufficient background for less experienced readers. The approach is unified, in that although different beverages are dealt with in different chapters, there is extensive cross-referencing and comparison between the subjects of each chapter. Appropriate for food professionals working in the development and manufacture of alcohol-based drinks, as well as academic and industrial researchers involved in the development of testing methods for the analysis and regulation of alcohol in the drinks industry. Divided into five parts, this comprehensive two-volume work presents: INTRODUCTION, BACKGROUND AND HISTORY: a simple introduction to the history and development of alcohol and some recent trends and developments. FERMENTED BEVERAGES: BEERS, CIDERS, WINES AND RELATED DRINKS: the latest innovations and aspects of the different fermentation processes used in beer, wine, cider, liqueur wines, fruit wines, low-alcohol and related beverages. SPIRITS: covers distillation methods and stills used in the production of whisky, cereal- and cane-based spirits, brandy, fruit spirits and liqueurs. ANALYTICAL METHODS: covering the monitoring of processes in the production of alcoholic beverages, as well as sample preparation, chromatographic, spectroscopic, electrochemical, physical, sensory and organoleptic methods of analysis. NUTRITION AND HEALTH ASPECTS RELATING TO ALCOHOLIC BEVERAGES: includes a discussion on nutritional aspects, both macro- and micro-nutrients, of alcoholic beverages, their ingestion, absorption and catabolism, the health consequences of alcohol, and details of the additives and residues within the various beverages and their raw materials.
Download or read book Wine Science written by Ronald S. Jackson and published by Academic Press. This book was released on 2008-04-30 with total page 789 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wine Science, Third Edition, covers the three pillars of wine science – grape culture, wine production, and sensory evaluation. It takes readers on a scientific tour into the world of wine by detailing the latest discoveries in this exciting industry. From grape anatomy to wine and health, this book includes coverage of material not found in other enology or viticulture texts including details on cork and oak, specialized wine making procedures, and historical origins of procedures. Author Ronald Jackson uniquely breaks down sophisticated techniques, allowing the reader to easily understand wine science processes. This updated edition covers the chemistry of red wine color, origin of grape varietyies, wine language, significance of color and other biasing factors to wine perception, various meanings and significance of wine oxidation. It includes significant additional coverage on brandy and ice wine production as well as new illustrations and color photos. This book is recommended for grape growers, fermentation technologists; students of enology and viticulture, enologists, and viticulturalists. NEW to this edition: * Extensive revision and additions on: chemistry of red wine color, origin of grape varietyies, wine language, significance of color and other biasing factors to wine perception, various meanings and significance of wine oxidation * Significant additional coverage on brandy and ice wine production * New illustrations and color photos
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 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 Understanding Wine Chemistry written by Andrew L. Waterhouse and published by John Wiley & Sons. This book was released on 2024-05-16 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding Wine Chemistry Understand the reactions behind the world’s most alluring beverages The immense variety of wines on the market is the product of multiple chemical processes – whether acting on components arising in the vineyard, during fermentation, or throughout storage. Winemaking decisions alter the chemistry of finished wines, affecting the flavor, color, stability, and other aspects of the final product. Knowledge of these chemical and biochemical processes is integral to the art and science of winemaking. Understanding Wine Chemistry has served as the definitive introduction to the chemical components of wine, their properties, and their reaction mechanisms. It equips the knowledgeable reader to interpret and predict the outcomes of physicochemical reactions involved with winemaking processes. Now updated to reflect recent research findings, most notably in relation to wine redox chemistry, along with new Special Topics chapters on emerging areas, it continues to set the standard in the subject. Readers of the second edition of Understanding Wine Chemistry will also find: Case studies throughout showing chemistry at work in creating different wine styles and avoiding common adverse chemical and sensory outcomes Detailed treatment of novel subjects like non-alcoholic wines, non-glass alternatives to wine packaging, synthetic wines, and more An authorial team with decades of combined experience in wine chemistry research and education Understanding Wine Chemistry is ideal for college and university students, winemakers at any stage in their practice, professionals in related fields such as suppliers or sommeliers, and chemists with an interest in wine.
Download or read book Wine Microbiology and Biotechnology written by Graham H. Fleet and published by CRC Press. This book was released on 1993-01-01 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wine Microbiology and Biotechnology presents developments in fermentation technology, enzyme technology, and technologies for the genetic engineering of microorganisms in a single volume. The book emphasizes the diversity of microorganisms associated with the winemaking process, and broadens the discussion of winemaking to include more modern concepts of biotechnology and molecular biology. In each chapter, recognized authorities in their field link the scientific fundamentals of microbiology, biochemistry, and biotechnology to the practical aspects of wine production and quality. They also provide relevant historical background and offer directions for future research.
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 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 Biology of Microorganisms on Grapes in Must and in Wine written by Helmut König and published by Springer. This book was released on 2017-11-01 with total page 711 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of the book begins with the description of the diversity of wine-related microorganisms, followed by an outline of their primary and energy metabolism. Subsequently, important aspects of the secondary metabolism are dealt with, since these activities have an impact on wine quality and off-flavour formation. Then chapters about stimulating and inhibitory growth factors follow. This knowledge is helpful for the growth management of different microbial species. The next chapters focus on the application of the consolidated findings of molecular biology and regulation the functioning of regulatory cellular networks, leading to a better understanding of the phenotypic behaviour of the microbes in general and especially of the starter cultures as well as of stimulatory and inhibitory cell-cell interactions during wine making. In the last part of the book, a compilation of modern methods complete the understanding of microbial processes during the conversion of must to wine.This broad range of topics about the biology of the microbes involved in the vinification process could be provided in one book only because of the input of many experts from different wine-growing countries.
Download or read book White Wine Technology written by Antonio Morata and published by Academic Press. This book was released on 2021-09-21 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: White Wine Technology addresses the challenges surrounding white wine production. The book explores emerging trends in modern enology, including molecular tools for wine quality and analysis of modern approaches to maceration extraction, alternative microorganisms for alcoholic fermentation, and malolactic fermentation. The book focuses on the technology and biotechnology of white wines, providing a quick reference of novel ways to increase and improve overall wine production and innovation. Its reviews of recent studies and technological advancements to improve grape maturity and production and ways to control PH level make this book essential to wine producers, researchers, practitioners, technologists and students. Covers trends in in both traditional and modern enology technologies, including extraction, processing, stabilization and ageing technologies Examines the potential impacts of climate change on wine quality Provides an overview of biotechnologies to improve wine freshness in warm areas and to manage maturity in cold climates Includes detailed information on hot topics such as the use of GMOs in wine production, spoilage bacteria, the management of oxidation, and the production of dealcoholized wines
Download or read book Women In Microbiology written by Rachel Ann Foster and published by Frontiers Media SA. This book was released on 2022-08-26 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemistry of Food written by Jan Velisek and published by John Wiley & Sons. This book was released on 2013-12-31 with total page 1139 pages. Available in PDF, EPUB and Kindle. Book excerpt: THE CHEMISTRY OF FOOD THE CHEMISTRY OF FOOD This advanced textbook covers all the main macro- and micronutrients and the essential nutritional factors that determine the nutritional and energy value of foods and raw food material. It includes chapters devoted to amino acids, peptides and proteins, fats and other lipids, carbohydrates, vitamins, mineral substances and water, and in addition to chapters devoted to antinutritional, toxic and other biologically active substances, food additives and contaminants. Each chapter addresses one of the main individual components of food, reviewing its important properties and functions. Detailed descriptions and explanations of the changes and chemical/biochemical reactions that occur under different conditions are also covered. The book provides a comprehensive overview of the chemical composition of foods and the changes that take place during food production, processing and storage. With an extensive list of tables and its comprehensive coverage, this almost encyclopaedic volume will be ideal for students at the Masters level and beyond, and is a vital all-in-one reference for professional food chemists, researchers and the food industry. The Chemistry of Food is supported by a website of online resources, including web links to relevant news and journal articles, references and further reading, glossary of key terms, and revision notes for all topics/chapters.
Download or read book Effects of Yeast Strain PH and Vitamin Supplementation During Vinification with Simultaneous Inoculation of Saccharomyces Cerevisiae and Lactic Acid Bacteria written by Anthony Joseph Rynders and published by . This book was released on 1993 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Technology of Wine Making written by Maynard Andrew Amerine and published by A V I Publishing Company. This book was released on 1980 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The revolution in the ancient art of wine makingreally began with Pasteur, whose knowledge of chemistry andmicrobiology led to the application of scientific principlesto the fermentation process. The scientific approachcontinues to grow in importance, although certain aspects ofgrowing and fermenting grapes, not to mention tasting thewine, defy definition. In an effort to keep abreast of thisburgeoning technology, an updated reference work explainscommercial production techniques for all types of wine (red,white, sparkling, sherry, port, fruit, and brandy) andprocesses for avoiding bacterial and non-bacterial spoilage.Winery equipment and design, the molds and yeasts of grapesand wines, and the chemistry of fermentation are discussedin detail. Although the major wine producing areas of theworld are described, emphasis is on American varieties, botheastern and western.
Download or read book Modern Technologies and Their Influence in Fermentation Quality written by Santiago Benito and published by MDPI. This book was released on 2020-05-20 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last few years, industrial fermentation technologies have advanced in order to improve the quality of the final product. Some examples of those modern technologies are the biotechnology developments of microbial materials, such as Saccharomyces and non-Saccharomyces yeasts or lactic bacteria from different genera. Other technologies are related to the use of additives and adjuvants, such as nutrients, enzymes, fining agents, or preservatives and their management, which directly influence the quality and reduce the risks in final fermentation products. Other technologies are based on the management of thermal treatments, filtrations, pressure applications, ultrasounds, UV, and so on, which have also led to improvements in fermentation quality in recent years. The aim of the issue is to study new technologies able to improve the quality parameters of fermentation products, such as aroma, color, turbidity, acidity, or any other parameters related to improving sensory perception by the consumers. Food safety parameters are also included.
