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Phosphate favors the biosynthesis of CdS quantum dots in Acidithiobacillus thiooxidans ATCC 19703 by improving metal uptake and tolerance

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FIGURE 1 | Phosphate favors the biosynthesis of CdS-QDs at pH 3.5. (A) Fluorescence of cells exposed to CdS-QDs biosynthesis conditions during 24 h in presence of different phosphate concentrations (Cd 2+ 0.66 mM and phosphate 0, 10, or 50 mM)
FIGURE 2 | Response surface for a two variables model describing the effect of cadmium and phosphate culture concentrations on the uptake of Cd by A
FIGURE 4 | Response surface for a two variables model describing the effect of cadmium and phosphate on polyP levels during QDs formation conditions (R 2 : 86%, p < 0.05)
FIGURE 5 | Models for phosphate dependent CdS-QDs biosynthesis by A. thiooxidans ATCC 19703

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