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Table 1 Experiments of second step designed by response surface analysis

From: A novel biosurfactant producing Kocuria rosea ABR6 as potential strain in oil sludge recovery and lubrication

Experiment

Factor number1

Agitation rate

Factor number2

Incubation

Factor number3

pH

1

140

120

9

2

140

72

8

3

140

96

10

4

100

120

9

5

100

96

10

6

100

72

8

7

120

96

9

8

120

96

8

9

120

120

10

10

120

72

10

11

120

96

9

12

120

96

8

13

120

72

9

14

120

96

9

15

120

120

10