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The Scientific World Journal
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2012
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Article
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Tab 1
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Research Article
Comparative Study of Various
E. coli
Strains for Biohydrogen Production Applying Response Surface Methodology
Table 1
The codes and levels of the variables used in the experimental design.
Variables
Coded level
ā1
0
1
pH
6
6.5
7
Formate conc. (g/L)
0
0.9
1.8