الفهرس 
Biohydrogen Production from Biomass by Photofermentation Using Helium-Neon Laser Irradiation
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Abstract
Biohydrogen has significant feasibility since biological processes are much less energy intensive compared with electrolysis and thermo-chemical processes. Biohydrogen producing bacteria was exposed to helium-neon red and green laser, this led to photobiostimulation of the bacterial cells (Activity, growth rate,..etc). The yielded biohydrogen by photo-fermentation of food leftovers was increased significantly. The yielded biohydrogen using this new technique produced hydrogen 1.26 and 1.79 times the control for red and green laser.