. Author manuscript; available in PMC: 2014 Jan 15.

Published in final edited form as: Environ Sci Technol. 2012 Dec 28;47(2):1148–1154. doi: 10.1021/es3036785

Table 1.

Bacterial viability. Number of live cells after 24 h exposure to high [Cd] = 300 mgL⁻¹ and low [Cd] = 10 mgL⁻¹ concentrations of chemical control solutions and to nanoparticles at [Cd] = 10 mgL⁻¹. The results are expressed as the log of CFU/mL (colony-forming units/mL).

Sample	CFU	Log CFU	p-value
Buffer (Control)	1.5E+09	9.2	-
300 mgL⁻¹ CdSO₄	1.2E+09	9.1	0.07
10 mgL⁻¹ CdSO₄	1.5E+09	9.2	0.76
Core QD	1.5E+09	9.2	0.80
Core/shell QD	1.8E+09	9.3	0.13

Data shown are mean + SE from four independent experiments; p-values are derived from student t-test.