Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2004 by Universidad Católica de Valparaíso -- Chile
Vol. 7 No. 3, Issue of December 15, 2004 
 

Table 4. Effect of nitrogen sources on production of FPase, cell mass and extracellular protein production relative to control which contained a-cellulose -Dubos salts +0.2% yeast extract +0.1% sodium nitrate. Control was composed of Dubos salts medium +0.2% yeast extract and supported 35.2 IU/ I/h, 21.02 mg/I/h and 0.255 g cells/I/h extracellular FPase, extracellular protein and cell mass productivity respectively. Standard deviation among 3 replicates was 2.0-3.5% of given values and have not been presented.

Nitrogen

Relative values (%) of control

 

FPase

Cell mass

Extracelluar

Dubos medium

 

 

 

Sodium nitrate in the control

100

100

100

Sodium nitrate (8-fold)

250

150

175

Potasium nitrate (2-fold)

125

125

135

Urea

85

78

80

Ammonium chloride

30

25

35

Ammonium sulphate

45

30

40

Diammonium hydrogen phosphate

70

65

75

Sodium glutamate

80

85

96

Ammonium nitrate

90

95

80

Corn steep liquor

45

60

70

 

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