Effect of Acetylene and Carbon Monoxide on Hydrogen Uptake and Evolution by Nitrogen-Starved Cultures of Mastigocladus laminosus

Isolation and Characterization of a Nonheterocystous Cyanobacterium,Lyngbyasp. Isolate No. 108, for Large-quantity Hydrogen Production

“…In seven days, this strain produced 770 ml hydrogen/g dry cells (0.205,umol/mg cells/hr). Anabaena eylindriea, 13) Mastigoẽ ladus laminosus 14 ) and Oseil/atoria sp. Miami BG-7 9 ) produce hydrogen in closed vessels.…”

Hydrogen Production and Carbohydrate Consumption byLyngbyasp. (No. 108)

“…Cells were cultivated in a . 21 Erlenmeyer flask containing 1 1 of. Pringsheim and Wiessner's medium,22) modified by the addition of vitamin B 12 (0.02 mg/I), KN0 3 (0.05 g/I), and yeast extract (0.1 gil).…”

Aerobic Hydrogen Accumulation by a Nitrogen-Fixing Cyanobacterium, Anabaena sp

“…Uptake hydrogenase is thought to recover hydrogen gas produced by a side reaction of nitrogenase through anaerobic light-dependent reaction and oxy-hydrogen reaction; the latter is suggested to contribute to the protection of nitrogenase against oxygen (5,10,22,23). In applicational studies, however, addition of carbon monoxide and acetylene (4, 13,14) and aerobic treatment of darkness (18) were tried to inactivate or repress uptake hydrogenase, which reduces net hydrogen production. The property of this strain described in Table 1 is advantageous for applicational hydrogen evolution since there is no need for artificial prevention of uptake of hydrogen.…”