Add time:09/30/2019         Source:infona.pl

The aim of conducted research was the estimation of 8-Hydroxyquinoline sulfate (cas 134-31-6) activity on selected mould strains isolated from the buildings with biodeterioration evidence. In the tests for the fungicidal activity, 6 working concentrations rangeing from 0.01 % to 1.0 % of 8-hydroxyquinoline sulfate were tested in terms of their efficiency. All strains under study were isolated from the building compartments and they were: Cladosporium cladosporioides, Alternaria tenuissima, Stachybotrys chartarum, Aspergillus flavus and Penicillium notatum. The effect of fungicide activity against moulds was assessed by means of diffusion cylinder-plate method. The rate of mycelial growth and the ability to germinate in the presence of the tested chemical was also estimated. In the cylinder-plate method the criterion for assessing fungicidal activity was based on the size of the zone of growth inhibition (measured in mm). The biggest – 85.0 mm zone of growth inhibition was obtained at the concentration of 1.0 % for Aspergillus and additionally for Penicillium at the concentration of 0.75 %. The same sizes of the zones (85.0 mm) were noted for Stachybotrys at 0.5 % concentration, and for Cladosporium and Alternatia at 0.25 % concentration. The increase in concentrations in all cases did not have an effect on the size of the zones of growth inhibition. On the basis of the growth rate of mycelium, it was noted that the most sensitive to 8-hydroxyquinoline sulfate activity are Stachybotrys and Alternaria strains. The lowest inhibitory dose which inhibited the mycelial growth completely was 0.2 %. The effective activity of the examined chemical at following concentrations: 0.25; 0.5; 0.75; and 1 % against the ability to germinate was observed for Cladosporium, Stachybotrys and Alternaria. The results obtained in the research showed that the inhibition of mycelium and spores were effective in case of 1 % of 8-hydroxyquinoline sulfate.

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