ANNOTATION
For the study of hydrogen production, 3 strains of nitrogen-fixing cyanobacteria
Nostoc calsicola RI-3, Anabaena variabilis R-I-5 and Anabaeba sp. Z-1 were taken from
the collection. To select cyanobacteria strains characterized by high hydrogen activity,
a hydrogen production study was conducted with three new strains isolated under dark
and light conditions. According to the results obtained, from 3 collection strains of
cyanobacteria Nostoc Calsicola RI-3 and Anabaena sp. Z-1 showed relatively high
hydrogen-forming activity in the dark. It was found that the greatest hydrogen release
occurred in the Nostoc calsicola RI-3 strain. The maximum accumulation of hydrogen
in this culture was observed after 72-hour incubation, which was 0.032 micromol H
2
/mg
chl/h. In light, the strain Anabaena variabilis R-I-5 had an active accumulation of
hydrogen, the activity of nitrogenase was significantly higher in light than in other
strains. The maximum rate of hydrogen accumulation by this type of strain was 0.012
micromol H
2
/mg hl/h. According to experimental data, light had a negative effect on the
production of hydrogen. For high-throughput of hydrogen through Nostoc calsicola RI-
3 and Anabaeba sp. Z-1 cells is optimal in dark conditions, light leads to a sharp decrease
in hydrogen production. Chlorophylls of PS2 may have too high activity, which causes
inactivation of hydrogenase enzymes, catalyzes the reduction of protons to molecular
hydrogen under the action of a directed flow of photosynthetic electrons, and promotes
the formation of an oxygen concentration that inhibits the evolution of hydrogen.
Достарыңызбен бөлісу: |