Photoproduction of Hydrogen under Different Cultural Conditions by Alginate Immobilized Rhodopsedomonas palustris KU003

Table 2

Effect of nitrogen source on hydrogen production (mL/15 mL vessel) by immobilized cells of Rps. palustris in anaerobic light.

Nitrogen source			Incubation period (in hrs)
	24	48	72	96	120	144	166	192
Potassium nitrate	—	0.26 ± 0.16	0.48 ± 0.28	0.92 ± 0.18	1.48 ± 0.36	0.76 ± 0.24	0.52 ± 0.02	0.34 ± 0.06
Sodium nitrate	—	0.48 ± 0.04	1.10 ± 0.18	1.66 ± 0.14	2.2 ± 0.38	1.46 ± 0.22	0.78 ± 0.16	0.36 ± 0.18
Ammonium chloride	—	—	—	—	—	—	—	—
Urea	—	—	0.38 ± 0.02	0.66 ± 0.06	1.14 ± 0.34	0.78 ± 0.18	0.54 ± 0.24	0.24 ± 0.14
Thiourea	—	—	0.26 ± 0.02	0.38 ± 0.18	0.78 ± 0.10	0.82 ± 0.08	0.66 ± 0.26	0.34 ± 0.12
Glycine	—	0.16 ± 0.06	0.64 ± 0.10	0.82 ± 0.08	1.86 ± 0.22	1.46 ± 0.04	1.18 ± 0.08	0.94 ± 0.18
L-asparagine	—	0.36 ± 0.06	0.68 ± 0.18	0.98 ± 0.12	1.78 ± 0.18	2.26 ± 0.26	1.64 ± 0.10	1.12 ± 0.16
L-aspartic acid	—	0.40 ± 0.08	0.76 ± 0.12	1.48 ± 0.18	2.4 ± 0.20	1.24 ± 0.32	0.84 ± 0.16	0.64 ± 0.10
L-glutamic acid	—	0.34 ± 0.06	0.66 ± 0.18	0.96 ± 0.16	1.74 ± 0.10	2.62 ± 0.48	1.44 ± 0.24	0.68 ± 0.14
L-glutamine	—	—	0.28 ± 0.10	0.46 ± 0.08	0.72 ± 0.24	1.82 ± 0.38	1.36 ± 0.16	0.64 ± 0.02
L-tyrosine	—	0.16 ± 0.06	0.64 ± 0.02	0.82 ± 0.08	1.86 ± 0.32	2.48 ± 0.16	1.18 ± 0.18	0.94 ± 0.26
L-cystine	—	0.28 ± 0.04	0.46 ± 0.14	0.88 ± 0.28	1.46 ± 0.46	2.12 ± 0.22	1.76 ± 0.14	1.12 ± 0.08
L-methionine	—	—	0.4 ± 0.02	0.68 ± 0.18	0.88 ± 0.20	1.52 ± 0.10	1.1 ± 0.08	0.74 ± 0.10
Nitrogen gas	—	—	—	0.42 ± 0.14	0.74 ± 0.22	1.34 ± 0.22	0.88 ± 0.16	0.38 ± 0.12

—No hydrogen.