TABLE 2.

Student’s t-test comparisons (p-values) between vanadium leaching in selected treatments.

S. desiccabilis on ISS
Microgravity (biology vs. control)	0.047*
Mars gravity (biology vs. control)	0.006*
Earth gravity (biology vs. control)	0.003*
Microgravity biology vs. Mars gravity biology	0.152
Microgravity biology vs. Earth gravity biology	0.361
Mars gravity biology vs. Earth gravity biology	0.341
B. subtilis on ISS
Microgravity (biology vs. control)	0.013*
Mars gravity (biology vs. control)	0.017*
Earth gravity (biology vs. control)	0.005*
Microgravity biology vs. Mars gravity biology	0.140
Microgravity biology vs. Earth gravity biology	0.053
Mars gravity biology vs. Earth gravity biology	0.771
C. metallidurans on ISS
Microgravity (biology vs. control)	0.394
Mars gravity (biology vs. control)	0.852
Earth gravity (biology vs. control)	0.338
Microgravity biology vs. Mars gravity biology	0.132
Microgravity biology vs. Earth gravity biology	0.995
Mars gravity biology vs. Earth gravity biology	0.431
ISS control comparisons
Microgravity control vs. Mars gravity control	0.895
Microgravity control vs. Earth gravity control	0.974
Mars gravity control vs. Earth gravity control	0.833
Ground 1×g experiments
S. desiccabilis vs. control	0.126
B. subtilis vs. control	0.101
C. metallidurans vs. control	0.778
Ground and ISS comparisons
S. desiccabilis ground vs. ISS Earth gravity	0.635
B. subtilis ground vs. ISS Earth gravity	0.994
C. metallidurans ground vs. ISS Earth gravity	0.294
Ground control vs. ISS Earth gravity control	0.793

p-values below 0.05 are shown as *. ‘Control’ refers to sterile control.