Upon complete oxidation of glucose, a stoichiometric yield of 12 H2 mol/glucose mol is obtained without any energy flow to support growth and metabolism of the producing organisms [46, 60].
For [OH-] < 8.00 × 10-3 mol L-1 the effect is zero, and apparent activation energy of 60.3 kJ moL-1 was obtaineffect
For [OH-] < 1.90 × 10-2 moL-1thehe reaction order was zero and apparent activation energy of 74.4 kJ mol-1 was obtained.
On the other hand, during the conversion period in Ca(OH 2 media for [OH-] > 1.90 × 10-2 mol L-1, the reaction order was 1.15, and an apparent activation energy of 74.4 kJ moL-1 was obtained.
In NaOH media, an apparent activation energy (Ea) of 60.3 kJ mol-1 was obtained, and in Ca(OH 2 the obtained apparent activation energy (Ea) was 74.4 kJ mol-1.
During the conversion period in NaOH media for [OH-] > 8 × 10-3 mol L-1, the process showed a reaction order of 1.86, and an apparent activation energy of 60.3 kJ moL-1 was obtained.
Finally, highly transparent sol gel solution with yttrium concentration of 0.1 mol/L was obtained.
In case of the co-cultures, the highest H2 yield of 2.32 mol H2/ mol hexose was obtained for co-culture (3) with C. butyricum and C. pasteurianum.
By inputting the data into Eq. (2), where X is defined as in Eq. (1), an increase in oxygen level of 2.522×10−9 mol s−1 and 3.422×10−9 mol s−1 was obtained from the vale and canal water, respectively.
The detection limit, with α=β=0.05, for gallium APDC complex was 5.0×10−8 mol dm−3, for gallium PCV complex was 9.9×10−9 mol dm−3, and the lowest detection limit (1.3×10−9 mol dm−3) was obtained with DDTC.
Under the optimal parameter combination, a linear calibration curve ranged from (1.0 to 15) × 10−6 mol L−1 with a detection limit of 1.12 × 10−6 mol L−1 was obtained.
