[Screening of yeast-producers of alpha-L-rhamnosidase].

Screening of producers of alpha-L-rhamnosidase among 331 yeast strains (representatives of 12 genera and 17 species) has been performed. A capacity to synthesize the enzyme was revealed in 45% of the studied strains with activity 0.01-0.

[Characteristics of three species of genus Debaryomyces Lodder & Kreger-van Rij].

A taxonomic state of the collection strains of three marketable species of genus Debaryomyses has been specified. Sources of their isolation have been analyzed and a list of econiches where the yeast occur has been supplemented. The properties have been found which are recommended to be used as additional for differentiation of D.

[Screening of microorganisms--producers of proteases].

Screening of producers of proteases among 367 strains of microorganisms has been carried out. A capacity to synthesize the enzymes was revealed in 25% of the studied strains of Bacillus genus (from 0.0054 to 0.

[Elaboration of systematic position and some physiological characteristics of collection strains of Debaryomyces hansenii (Zopf) Looder et Kreger-Van Rij].

Morphological and physiological properties of 52 strains of yeast Debaryomyces hansenii from the Ukrainian collection of microorganisms has been investigated. The belonging of 40 strains to the given species is confirmed. According to new classification 35 of them are referred to D.

[Investigation of the activity of the preparation cerbiden against Candida spp].

Antifungal activity of a new complex antibiotical preparation cerbiden obtained from medical plant Bidens cernua L. of the Asteraceae family, was investigated in vitro against the clinical and museum strains of Candida spp. High cerbiden activity against clinical and museum strains of Candida albicans, C.

[Search for lectin-producers among representatives of some yeast genera].

Hemagglutinating properties of the culture liquid and cells of 451 strains, 24 species, 7 genera of the museum and fresh yeast cultures have been investigated. The researchers have distinguished 333 strains (74%) capable for production of extracellular lectins and those bound to the cell surface with activity about 512-1024 hemagglutinating units. The extracellular lectins were found in 41% of lectin-synthesizing strains; the highest amount of their producers were found among representatives of genera Saccharomyces, Kluyveromyces, Cryptococcus.

[Screening of collagenase and keratinase producers].

The study of the capacity of 310 strains of microorganisms from different taxonomic groups (40 bacilli, 43 yeast, 105 streptomycetes, 12 micromycetes) to hydrolyze collagen and keratin allowed to establish that the highest level of collagenase (KA) and keratinase (KerA) activity is inherent in representatives of streptomycetes. Two strains of Streptomyces sp.--1349 and 1382 with the highest KA and KerA indices--1.