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Table 3 D-optimal design and experimental results of exo-PG activity in the medium optimization for A. sojae ATCC 20235

From: Efficient polygalacturonase production from agricultural and agro-industrial residues by solid-state culture of Aspergillus sojae under optimized conditions

Trial

Experimental factors

Response

Inducer concentration (%)

Moisture level (%)

exo-PG activity (U/g)

1

10

85

124.1

2

35

85

270.1

3

10

135

371.2

4

35

135

552.3

5

10

110

252.4

6

35

110

413.5

7

22.5

85

221.9

8

22.5

135

493.6

9*

22.5

110

347.5

10*

22.5

110

328.5

11*

22.5

110

325.4

12

65

165

0

13

65

145

0

14

45

165

512.4

15

45

145

418.7

16

55

155

39.5

17

65

135

0

18

35

165

557.2

  1. *The standard variation between the center point repetitions was below 3%.