Recently, the methodology that will serve as a basis of the standard for antifungal susceptibility testing of fermentative yeasts of the European Committee on Antibiotic Susceptibility Testing has been described. This procedure employs a spectrophotometric method for both inoculum adjustment and endpoint determination. However, the utilization of a spectrophotometer requires studies for standar...

V. NAYDENOVA, V., S. VASSILEV, M. KANEVA and G. KOSTOV, 2013. Encapsulation of brewing yeast in alginate/ chitosan matrix: comparative study of beer fermentation with immobilized and free cells. Bulg. J. Agric. Sci., Supplement 2, 19: 123–127 In the present study, the possibilities for beer production with lager brewing yeasts, encapsulated in alginate/chitosan matrix with a liquid core, were i...

Actidione, an antibiotic produced by Streptomyces griseus, is highly active against a large number of yeasts but it has no marked antibacterial activity. Of 22 species of yeasts tested by Whiffen (1948), 9 were completely inhibited by 0.17 jig drug per ml; Saccharomyces cerevisae required 10 ,ug per ml and 5 species were not inhibited by 1000 ,ug per ml. There appears to be little in the litera...

Killer yeasts are able to produce toxins that antagonize the growth of susceptible yeasts cells of the same species or the ones that are related to them. Killer strains are resistant to their own toxins but can be sensitive to killer proteins of other yeasts. The killer proteins of Pichia spp. are known for its broad spectrum of antifungal activity including pathogens such as Candida albicans. ...

Saccharomyces cerevisiae is the main microorganism responsible for the fermentation of wine. Nevertheless, in the last years wineries are facing new challenges due to current market demands and climate change effects on the wine quality. New yeast starters formed by non-conventional Saccharomyces species (such as S. uvarum or S. kudriavzevii) or their hybrids (S. cerevisiae x S. uvarum and S. c...

The addition of a solid carrier before drying seems promising way to improve the processability and kinetics yeast pellets. However, its influence on quality yeasts during at end is not yet well understood investigated in this communication. A paste was mixed with different amounts wheat flour, carrier, obtain pellets 69, 55, 40 wt% moisture content. fermentation activity measured samples taken...

UNLABELLED The naturally occurring compound, fumaric acid, was evaluated as a potential preservative for the long-term storage of cucumbers. Fumaric acid inhibited growth of lactic acid bacteria (LAB) in an acidified cucumber juice medium model system resembling conditions that could allow preservation of cucumbers in the presence of sodium benzoate. Forty millimolars of fumaric acid were requi...

Yeasts can accumulate heavy metals and grow in acidic media. In the present study, it was shown that Candida yeasts an aqueous solution single Cu(II) Ni(II) cations. The effect of metal ions on specific growth rate biomasses uptake during phase investigated a batch system. Bioaccumulation efficiency decreased with increasing ion concentrations at constant sucrose concentrations. Both biomass co...

Microbial contamination may represent a loss of money for wine producers as several defects can arise due to microorganism’s growth during storage. The aim this study was implement bioluminescence assay protocol rapidly and simultaneously detect bacteria yeasts in wines. Different wines samples were deliberately contaminated with at different concentrations filtered through two serial filters d...