Increased inactivation of Saccharomyces cerevisiae by protraction of UV irradiation

Article Abstract:

Long exposure to low intensities of UV irradiation leads to better inactivation in haploid and diploid strains of Saccharomyces cerevisiae. The effect is higher in diploid yeast strains but absent in yeast spores. A study of the effects of variations in UV irradiation intensities on bacterial viruses, strains and spores indicates that bacteria and viruses are unaffected by changes in exposure times and intensities within selected UV doses. Variations in inactivation rates on exposure to three UV intensities are analyzed using Newman-Keuls tests.

Usage, Physiological aspects, Ultraviolet radiation, Microorganisms, Irradiation, Radiation effects, Irradiation (Radiation exposure)

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Induction of heat, freezing and salt tolerance by heat and salt shock in Saccharomyces cerevisiae

Article Abstract:

A study of the stress tolerance of Saccharomyces cerevisiae following salt and heat shock in the presence or absence of cycloheximide, the protein synthesis suppressor, reveals that heat shock proteins may be involved in salt and heat tolerance induction, while protein synthesis is essential for freezing tolerance stimulation. Stress protein synthesis and glycerol accumulation are activated by the exposure of cells to salt shock. Stress tolerance increases in response to salt shock in the absence of cycloheximide.

Analysis, Biocompatibility

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