decolourise


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Synonyms for decolourise

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For protein precipitated at 60 to 100% saturation, only laccase activity was detected and all protein precipitates were able to decolourise RBBR dye.
The fungal isolate MS8 was able to decolourise RBBR dye in the GM liquid medium (Figure 1) as can be seen with the disappearance of the blue coloured dye in flask treated with the fungus (Figure 1(b)).
Interestingly, the result showed that the harvested culture medium was able to decolourise RBBR dye in vitro and the higher the ligninolytic enzymes content in the culture medium, the higher the percentage of RBBR dye decolourised (Figure 4).
In order to examine the ability of isolate MS8 to continuously decolourise RBBR, fresh RBBR dye was further supplemented to the culture medium when dye decolourisation in the culture reached more than 80%.
The results obtained showed that the protein precipitate containing 450 U [L.sup.-1] of laccase activity was able to decolourise all the tested dye that can be seen in Figures 6(a)-6(c), with the decrease in the spectrum at the maximal absorbance of the dye (arrow) after 19 hours.
The dye decolourising enzyme induced by RBBR dye (anthraquinone), apart from the ability to decolourise the inducing dye, was also able to decolourise dyes (azo) which were structurally different from the inducer.
Interestingly, the induced laccase activity allowed the fungus to repeatedly decolourise freshly supplemented RBBR dye at a much faster rate [18].
It expected to be involved in dye decolourisation because under the anaerobic conditions many bacteria have been reported to readily decolourise azo dyes [24].
Several bacterial strains have been reported to decolourise azo dyes aerobically by reductive mechanisms [26] such as Bacillus subtilis, Proteus mirabilis, Pseudomonas pseudomallei 13NA and Pseudomonas luteola [27; 28; 29].
Amounts of different samples used to decolourise DCPIP solution at different time intervals.
After rinsing the slides with a gentle stream of water, 25 per cent sulphuric acid was used to decolourise the smears for 2 to 3 min.