TABLE 1.

Data associated with the biomining of vanadium.

		1	2	3	4
		Quantity (ng)	Comparison with control (%)	Comparison with quantity in basalt (%) x 10–4	Percentage of total leached in cell pellet (%)
S. desiccabilis	Microgravity	19.84 ± 2.29	184.92 ± 75.33	60.61 ± 7.01	1.39 ± 0.51
	Mars gravity	23.45 ± 2.70	216.32 ± 68.43	71.65 ± 8.25	1.69 ± 0.40
	Earth gravity	21.50 ± 1.59	208.70 ± 55.85	65.70 ± 4.85	0.96 ± 0.23
B. subtilis	Microgravity	30.38 ± 3.90	283.22 ± 116.44	92.82 ± 11.91	0.96 ± 0.36
	Mars gravity	23.83 ± 4.78	219.78 ± 78.37	72.805 ± 14.62	1.86 ± 0.53
	Earth gravity	22.83 ± 2.84	221.59 ± 63.30	69.74 ± 8.66	1.74 ± 0.85
C. metallidurans	Microgravity	13.19 ± 1.53	122.97 ± 50.10	40.30 ± 4.66	2.67 ± 1.05
	Mars gravity	11.23 ± 0.96	103.54 ± 31.78	34.30 ± 2.94	4.20 ± 1.73
	Earth gravity	13.21 ± 3.80	128.21 ± 49.47	40.35 ± 11.61	1.67 ± 0.35
Sterile ISS control	Microgravity	10.73 ± 4.19	−	32.77 ± 12.80	−
	Mars gravity	10.84 ± 3.19	−	33.12 ± 9.76	−
	Earth gravity	10.30 ± 2.65	−	31.47 ± 8.09	−
Ground 1 g experiment	S. desiccabilis	22.69 ± 3.72	194.13 ± 143.11	69.33 ± 11.36	2.46 ± 1.31
	B. subtilis	22.81 ± 2.31	195.12 ± 141.63	69.68 ± 7.07	1.41 ± 0.31
	C. metallidurans	10.26 ± 1.85	87.78 ± 65.04	31.35 ± 5.65	2.73 ± 1.06
	Sterile control	11.69 ± 8.40	−	35.72 ± 25.67	−

Columns: (1) Mean (± standard deviation) of quantities of vanadium (ng) in the chamber fluid (6 mL) at the end of the experiment (50% R2A and fixative contribution subtracted). Data presented in Figure 2; (2) Mean (± standard deviation) leached quantity of vanadium in biological experiments expressed as a percentage of sterile controls; (3) Quantity of vanadium leached in biological experiments as percentage of total quantity in basalt slide; (4) Total yield of vanadium absorbed by cell pellet, expressed as a percentage of total yield in the pellet and bulk chamber fluid (%). Mars gravity and Earth gravity refer to simulated Martian (0.4 × g) and terrestrial (1 × g) gravity on ISS.