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High frequency of DHSS degrading actinomycetes confirmed their reputation for potent biodegraders. However, the biodégradation rates were rather slow (Figure 1). Only Streptomyces fradiae and Nocardiae argentinensis completed primary biodégradation of DHSS within 15 days under test conditions (Table 2).

Table 2

Primary biodégradation of DHSS by culture collection actinomycetes. 15 day cultivation in mineral medium containing 100 mg/1 DHSS. Inoculated with washed cells grown in liquid nutrient media.

Table 2

Primary biodégradation of DHSS by culture collection actinomycetes. 15 day cultivation in mineral medium containing 100 mg/1 DHSS. Inoculated with washed cells grown in liquid nutrient media.

Actinomycetes strains

Origin*

DHSS biodégradation (%)

Streptomyces fradiae

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