Diffuse-reflectance laser flash photolysis has been used to record transient spectra and decay kinetics of the photodynamic therapy sensitizer disulfonated aluminium phthalocyanine in two murine cancer cell lines, P815 derived from white mouse mast cells, and EL4, a lymphoblast derived from black mouse lymphocytes. In contrast to results with bacterial cells and yeasts, no transient other than ...

Two different growth media, namely complex and defined media, were used to examine establishment of steady-state conditions in phosphate-limited culture system of Saccharomyces cerevisiae CEN.PK113-5D strain. Using the defined growth medium, it was possible to obtain steady state condition in the continuous culture. The effect of phosphate concentration on the growth of S. cerevisiae in pho...

In the present work, a practical method for determination of the basic physicochemical parameters of beer real extract, alcohol and biomass concentration based on the amount of produced CO2 during the fermentation is investigated. The method was applied for determination of biomass concentration in immobilized preparations after its approbation with analytical data for beer fermentations with f...

The conversion of grape must into wine involves the development and succession of yeast populations differing in species composition. The initial population is formed by vineyard strains which are washed into the must from the crushed grapes and then completed with yeasts coming from the cellar environment. As the origin and natural habitat of the vineyard yeasts are not fully understood, this ...

Yeast volatiles attract insects, which apparently is of mutual benefit, for both yeasts and insects. However, it is unknown whether biosynthesis of metabolites that attract insects is a basic and general trait, or if it is specific for yeasts that live in close association with insects. Our goal was to study chemical insect attractants produced by yeasts that span more than 250 million years of...

background: chronic myeloid leukemia is a common cancer in human and chemical therapy is a routine method for treatment that has some side effects. so the goal of this study was the use of natural compound such as cell wall obtained from saccharomyces cerevisiae ( s. cerevisiae ) and saccharomyces boulardi ( s. boulardi ) and iron nanoparticles on the growth inhibition of k562 cell line. method...

BACKGROUND Under N-limiting conditions, Saccharomyces cerevisiae strains display a substantial variability in their biomass yield from consumed nitrogen -in particular wine yeasts exhibit high growth abilities- that is correlated with their capacity to complete alcoholic fermentation, a trait of interest for fermented beverages industries. The aim of the present work was to assess the contribut...

The polyene antibiotic candicidin produces a rapid efflux of K(+) ions from a suspension of Candida albicans. Onset of K(+) leakage depends on the culture age, stationary-phase yeasts leaking K(+) more slowly than exponential-phase yeasts. The time taken for potassium leakage to begin represents the time taken by the antibiotic to cross the cell wall and produce membrane damage. It was shown th...

Objective: The aim of this study was to determine the Minimum inhibitory concentration (MIC) and minimum fungicidal or bactericidal concentration (MFC, MBC) of oleo-gum resin of Ferula assafoetida on the growth of food spoilage microbes of bacteria, yeasts and fungal and investigation of the most sensitive of them to oleo-gum resin of these plant. Methods: In this study oleo-gum resin ...

Objective: The aim of this study was to determine the Minimum inhibitory concentration (MIC) and minimum fungicidal or bactericidal concentration (MFC, MBC) of oleo-gum resin of Ferula assafoetida on the growth of food spoilage microbes of bacteria, yeasts and fungal and investigation of the most sensitive of them to oleo-gum resin of these plant. Methods: In this study oleo-gum resin ...