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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

yeast --- adaptation --- interactions --- Metabolism --- Wine --- Saccharomyces --- Brettanomyces --- Microbial Diversity --- Fermentation --- Aroma compound

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Aroma compounds are some of the main compounds responsible for the acceptance of oenological products such as wine, vinegar and derived products. These kinds of compounds are produced during the winemaking process and they can be affected by natural, geographical and human factors: raw material, alcoholic and acetic fermentation, ageing, distillation, technological processes, etc. Therefore, it is very important to study and to characterize the aromatic fraction of these oenological beverages in order to improve the quality of the final product. Therefore, this book is focused on some recent studies related to the study of the volatile composition of wine, vinegar and derived products, in many different fields of science: oenology, chemistry, food science and technology, biochemistry, microbiology, biotechnology, engineering, sensory analysis, etc., and it shows the great importance of both sensory and analytical study of oenological products aroma and how they are influenced by the different stages and conditions under which they are elaborated. In this book, you will find 12 valuable scientific contributions: 2 literature reviews and 10 original research works, which deal with the latest advances in both sensory and analytical tools in order to evaluate the effects of different techniques or winemaking stages on the oenological products’ aromas.

sensory analysis --- sweet wine --- raisining --- climate chamber --- 1,1,6-Trimethyl-1,2-dihydronaphthalene (TDN) --- wine --- sensory threshold --- serving temperature --- bee pollen --- Tintilla de Rota --- alcoholic fermentation --- warm climate --- volatile compounds --- sensory profile --- fermentative activator --- red winemaking --- red wines --- chitosan --- sparkling wine --- foamability --- sensory --- bottle aging --- flavor profile --- sensory evaluation --- volatile composition --- white wine --- grapes --- wines --- cryoextraction --- oak --- cherry --- chestnut --- wood chips --- phenolic compounds --- aroma --- ageing --- wine secondary aroma --- fermentation --- non-saccharomyces yeasts --- lactic acid bacteria --- strain variability --- tannins --- polyphenol-aroma interactions --- saliva --- in vitro release --- in vivo release --- retronasal aroma --- time-intensity --- HS-GC/MS --- sparkling wines --- bentonite --- foam properties --- wine aroma --- oral release --- aroma persistence --- in-mouth headspace sorptive extraction --- Sherry --- vinegar --- brandy --- n/a

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Odors --- Smell --- -Smell --- -Social aspects --- History --- Odors. --- Smell. --- -#VCV monografie 1999 --- Olfaction --- Chemical senses --- Senses and sensation --- Nose --- Aromas --- Fragrances --- Scents --- Smells --- Sensory evaluation --- Sense of Smell --- Smell Sense --- Olfactometry --- Odor --- Social aspects. --- Odorants. --- Odorants --- Odorant --- Aroma --- Fragrance --- Scent --- Odours --- Social aspects --- Odors - - Social aspects --- Smell - - History --- -Odorants --- -Odors --- -Smell -

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Yeasts are truly fascinating microorganisms. Due to their diverse and dynamic activities, they have been used for the production of many interesting products, such as beer, wine, bread, biofuels and biopharmaceuticals. Saccharomyces cerevisiae (bakers’ yeast) is the yeast species that is surely the most exploited by man. Saccharomyces is a top choice organism for industrial applications, although its use for producing beer dates back to at least the 6th millennium BC. Bakers’ yeast has been a cornerstone of modern biotechnology, enabling the development of efficient production processes for antibiotics, biopharmaceuticals, technical enzymes, and ethanol and biofuels. Today, diverse yeast species are explored for industrial applications, such as e.g. Saccharomyces species, Pichia pastoris and other Pichia species, Kluyveromyces marxianus, Hansenula polymorpha, Yarrowia lipolytica, Candida species, Phaffia rhodozyma, wild yeasts for beer brewing, etc. This Special Issue is focused on recent developments of yeast biotechnology with topics including recent techniques for characterizing yeast and their physiology (including omics and nanobiotechnology techniques), methods to adapt industrial strains (including metabolic, synthetic and evolutionary engineering) and the use of yeasts as microbial cell factories to produce biopharmaceuticals, enzymes, alcohols, organic acids, flavours and fine chemicals, and advances in yeast fermentation technology and industrial fermentation processes.

coffee processing --- coffee fermentation --- starter culture --- coffee beverage --- yeast --- Icewine --- Saccharomyces cerevisiae --- hyperosmotic stress --- CRISPR-Cas9 --- glycerol transport --- STL1 --- brewing --- Cyberlindnera --- NABLAB --- non-alcoholic beer --- non-conventional yeast --- non-Saccharomyces yeast --- response surface methodology --- Ustilago --- itaconic acid --- process improvement --- lignocellulosic feedstock --- yeasts --- grape --- federweisser --- wine --- microbiota identification --- MALDI-TOF MS Biotyper --- Torulaspora delbrueckii --- craft beer --- microbrewery plant --- mixed fermentation --- aroma profile --- strain collection --- aroma profiling --- gas chromatography --- wine yeast --- Saccharomyces --- fermentation --- volatile aroma compounds --- Simultaneous inoculation --- Alcoholic fermentation --- Malolactic fermentation --- Sacccharomyces cerevisiae --- Oenococcus oeni --- PN4TM --- OmegaTM --- Aroma profile --- antioxidant --- coffee --- W. anomalus --- industrial brewer’s strains --- adaptive laboratory evolution (ALE) --- snowflake phenotype --- beer fermentation --- wine yeasts --- lactic acid bacteria --- co-inoculation --- sequence inoculation --- flavor compounds --- color pigments --- cell printing --- piezoelectric dispensing --- GFP-tagged yeast clone collection --- living cell microarrays --- microfluidic chip --- dynamic single-cell analysis --- Candida albicans --- adhesion --- fibronectin --- nanomotion --- atomic force microscope (AFM) --- xylose metabolism --- genetic engineering --- biofuel --- Spathaspora passalidarum --- Pichia stipitis --- volatile organic compounds --- proton-transfer reaction-mass spectrometry --- Metschnikowia pulcherrima --- flavor --- non-Saccharomyces yeasts --- fermentation-derived products --- fermented beverages --- beer --- coffee bean fermentation --- itaconic acid production --- bioethanol production --- bioreactors --- yeast micro- and nanobiotechnology

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From the beginning of this century, non-Saccharomyces yeasts have taken increased relevance in wine processing. Several biotechnological companies now produce non-Saccharomyces yeasts at an industrial level to improve aroma or flavor, stabilize wine, produce biological acidification, or conversely metabolize malic acid. Species like Torulaspora delbrueckii, Metschnikowia pulcherrima, Kloeckera apiculata, Lachancea thermotolerans, Schizosaccharomyces pombe, and several others are common due to the technological applications they have in sensory quality but also in wine ageing and stabilization. Moreover, spoilage non-Saccharomyces yeasts like Brettanomyces bruxellensis, Saccharomycodes ludwigii, and Zygosacharomyces bailii are becoming important because of the alterations they are able to produce in high-quality wines. New strategies to control these defective yeasts have been developed to control them without affecting sensory quality. The knowledge of the physiology, ecology, biochemistry, and metabolomics of these yeasts can help to better use them in controlling traditional problems such as low fermentative power, excessive volatile acidity, low implantation under enological conditions, and sensibility to antimicrobial compounds like sulfites traditionally used in wine processing. This Special Issue intends to compile current research and revised information on non-Saccharomyces yeasts with enological applications to facilitate the use and the understanding of this biotechnological tool. In 1 year this SI has globally more than 15kdownloads and produced more than 30 citations.

n/a --- wine acidity --- pulcherrimin --- glycosidases --- Lactobacillus plantarum --- Saccharomycodes ludwigii --- sparkling wine --- processing foods --- non-Saccharomyces --- taxonomy --- Candida stellate --- wine quality --- Candida stellata --- non-Saccharomyces yeast --- Brettanomyces bruxellensis --- flavor complexity --- Schizosaccharomyces pombe --- Wickerhamomyces anomalus --- Stermerella bacillaris --- mixed cultures fermentation --- oenological uses --- winemaking --- re-fermentation --- Zygosaccharomyces rouxii --- Torulaspora delbrueckii --- genetic improvement --- Zygotorulaspora florentina --- maloalcoholic fermentation --- high-ethanol --- mixed starters --- yeast --- wines --- non-Saccharomyces yeasts --- aroma compounds --- spoilage yeasts’ control --- metabolism --- acetate esters --- Pichia anomala --- wine --- sequential fermentations --- spoilage-control --- enzymes --- yeast dominance --- acidification --- ageing-on-lees --- Kluyveromyces thermotolerans --- co-fermentation --- biotechnological applications --- stable pigments --- ecology --- Pichia kudriavzevii --- Lachancea thermotolerans --- Metschnikowia pulcherrima --- biocontrol --- S. ludwigii --- Candida intermedia --- nitrogen --- yeast inoculation --- volatile acidity --- off-flavors --- malolactic bacteria --- wine safety --- genome --- Aureobasidium pullulans --- viticulture --- anthocyanin --- aroma --- antimicrobial peptides --- spoilage yeasts' control