Search results for " Wine fermentation"

showing 4 items of 4 documents

Beneficial effects of Candida zemplinina in wine fermentation: lower alcohol level and higher glycerol content

2012

Candida zemplinina wine fermentation alcohol glycerolSettore AGR/15 - Scienze E Tecnologie Alimentari
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Effects of temperature, pH and sugar concentration on the growth parameters of Saccharomyces cerevisiae, S. kudriavzevii and their interspecific hybr…

2008

The effects of temperature, pH and sugar concentration (50% glucose + 50% fructose) on the growth parameters of Saccharomyces cerevisiae T73, S. kudriavzevii IFO 1802T and the hybrid strain S. cerevisiae × S. kudriavzevii W27 were studied by means of response surface methodology based in a central composite circumscribed design. Lag phase could not be properly modelled in the wine model system, where yeasts started the fermentation in few hours after inoculation. In the case of the maximum specific growth rate (μ max), the temperature was the most important variable for three yeasts, although the effects of sugar concentration (in T73 and W27) and pH (W27 and 1802) were also significan…

Central composite designSaccharomyces cerevisiaeWineFructoseSaccharomyces cerevisiaeBiologyModels BiologicalMicrobiologySaccharomycesFood scienceResponse surface methodologySugarFermentation in winemakingChimeraTemperatureGeneral MedicineHydrogen-Ion Concentrationbiology.organism_classificationcentral composite design; hybrid yeast; response surface; Saccharomyces cerevisiae; Saccharomyces kudriavzevii; wine fermentationYeastGlucoseBiochemistryFermentationFermentationSaccharomyces kudriavzeviiFood Science
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Indigenous yeast communities in the environment of ‘‘Rovello bianco’’ grape variety and their use in commercial white wine fermentation

2009

The indigenous yeast communities associated with several vineyard habitats were analysed. Wild yeasts were isolated, differentiated at strain level and identified. A phylogenetic tree based on partial 26S rRNA genes was constructed. The strains were characterized and the indigenous Saccharomyces cerevisiae GR1 was then used to carry out a vinification process and compared with a commercial yeast. Wines obtained were subjected to chemical and sensory analysis. The comparison between the two products highlighted differences due to the fer- menting strains employed. The vineyard environment was found to strongly influence the composition of yeast communities, thus, confirming the theory of ‘te…

Fermentation in winemakingWinebiologyAscomycotaPhylogenetic treeBirds Grape variety ‘‘Rovello bianco’’ or ‘‘Greco muscio’’ PCR-DGGE Saccharomyces cerevisiae Vineyard environment Wild yeasts Wine fermentationPhysiologySaccharomyces cerevisiaefood and beveragesGeneral Medicinebiology.organism_classificationApplied Microbiology and BiotechnologyVineyardYeastBirds Grape variety ‘‘Rovello bianco’’ or ‘‘Greco muscio’’ PCR-DGGEBotanyFermentationBiotechnologySettore AGR/16 - Microbiologia Agraria
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Yeast ecology of vineyards within Marsala wine area (western Sicily) in two consecutive vintages and selection of autochthonous Saccharomyces cerevis…

2012

In this work, the yeast ecology associated with the spontaneous fermentation of Grillo cultivar grapes from 10 vineyards was analyzed from grape harvest till complete consumption of must sugars. The microbiological investigation started with the plate count onto two culture media to distinguish total yeasts (TY) and presumptive Saccharomyces (PS). Yeasts were randomly isolated and identified by a combined genotypic approach consisting of restriction fragment length polymorphism (RFLP) of 5.8S rRNA gene and 26S rRNA and sequencing of D1/D2 domain of the 26S rRNA gene, which resulted in the recognition of 14 species belonging to 10 genera. The distribution of the yeasts within the vineyards s…

IdentificationGenotypeSaccharomyces cerevisiaeAcetic Acid; Culture Media; DNA Fungal; Ethanol; Fermentation; Genotype; Hydrogen Sulfide; Microsatellite Repeats; Polymerase Chain Reaction; Polymorphism Restriction Fragment Length; RNA Ribosomal; Saccharomyces cerevisiae; Sicily; Sulfites; Temperature; Vitis; WineBioengineeringWineSaccharomyces cerevisiaeBiologyApplied Microbiology and BiotechnologySaccharomycesPolymerase Chain ReactionEnological aptitudeYeastsGenotypeSulfitesVitisHydrogen SulfidePolymorphismDNA FungalSicilyAcetic AcidRibosomalWineEthanolEcologyIdentification; Enological aptitudes; Saccharomyces cerevisiae; Spontaneous wine fermentation; YeastsTemperatureDNARibosomal RNASpontaneous wine fermentationbiology.organism_classificationYeastCulture MediaFungalRestriction Fragment LengthRNA RibosomalFermentationRNAFermentationRestriction fragment length polymorphismPolymorphism Restriction Fragment LengthBiotechnologySettore AGR/16 - Microbiologia AgrariaMicrosatellite RepeatsJournal of bioscience and bioengineering
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