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Table 1 Surface tension of 29 bacterial isolates on glucose-containing mineral medium over a period of 7 days. Results are presented as mean ± SD of three replicates

From: Isolation of biosurfactant-producing Pseudomonas aeruginosa RS29 from oil-contaminated soil and evaluation of different nitrogen sources in biosurfactant production

Isolate no.

Day

0

1

2

3

4

5

6

7

Ca

71.1 ± 0.30

71.0 ± 0.24

71.0 ± 0.40

69.9 ± 0.30

69.9 ± 0.23

70.0 ± 0.20

69.8 ± 0.32

69.8 ± 0.04

1

65.0 ± 0.25

60.0 ± 0.20

55.8 ± 0.50

46.3 ± 0.40

45.0 ± 0.43

45.0 ± 0.33

48.9 ± 0.30

50.0 ± 0.30

2

65.5 ± 0.50

56.3 ± 0.09

56.0 ± 0.20

53.9 ± 0.24

53.0 ± 0.32

53.2 ± 0.22

48.3 ± 0.20

40.8 ± 0.30

3

67.9 ± 0.40

69.4 ± 0.44

66.5 ± 0.43

65.0 ± 0.31

65.0 ± 0.33

63.7 ± 0.26

62.2 ± 0.40

60.0 ± 0.21

4

68.8 ± 0.16

64.0 ± 0.23

61.8 ± 0.43

61.0 ± 0.33

62.2 ± 0.43

63.0 ± 0.27

60.7 ± 0.44

69.5 ± 0.20

5

71.2 ± 0.19

71.0 ± 0.30

70.4 ± 0.41

70.1 ± 0.50

69.0 ± 0.50

69.0 ± 0.30

69.8 ± 0.32

57.2 ± 0.20

6

71.3 ± 0.25

71.0 ± 0.51

54.1 ± 0.40

53.4 ± 0.30

52.4 ± 0.30

55.5 ± 0.15

57.0 ± 0.20

44.5 ± 0.22

7

60.3 ± 0.16

45.9 ± 0.21

47.0 ± 0.20

46.0 ± 0.30

45.0 ± 0.20

43.2 ± 0.30

41.4 ± 0.24

56.4 ± 0.32

8

69.8 ± 0.12

68.5 ± 0.17

60.1 ± 0.24

60.0 ± 0.43

62.7 ± 0.41

59.8 ± 0.16

57.7 ± 0.25

69.5 ± 0.40

9

69.3 ± 0.50

69.5 ± 0.46

70.6 ± 0.34

70.6 ± 0.40

70.0 ± 0.30

69.7 ± 0.40

69.5 ± 0.30

54.0 ± 0.30

10

68.3 ± 0.25

52.2 ± 0.30

53.7 ± 0.40

51.8 ± 0.30

45.0 ± 0.16

48.3 ± 0.30

53.5 ± 0.40

62.2 ± 0.31

11

69.9 ± 0.51

56.6 ± 0.26

60.2 ± 0.40

60.0 ± 0.30

60.0 ± 0.37

61.7 ± 0.40

62.0 ± 0.21

61.8 ± 0.40

12

60.8 ± 0.15

57.7 ± 0.21

60.4 ± 0.16

57.8 ± 0.23

57.0 ± 0.16

59.5 ± 0.24

61.0 ± 0.40

57.1 ± 0.22

13

70.9 ± 0.50

70.2 ± 0.47

61.2 ± 0.50

61.0 ± 0.35

55.5 ± 0.25

55.0 ± 0.34

57.1 ± 0.23

44.7 ± 0.40

14

69.4 ± 0.16

59.2 ± 0.24

58.6 ± 0.22

57.1 ± 0.35

56.2 ± 0.40

55.0 ± 0.08

54.7 ± 0.12

57.4 ± 0.05

15

65.9 ± 0.06

63.8 ± 0.17

61.3 ± 0.07

55.3 ± 0.11

55.0 ± 0.22

45.0 ± 0.17

46.3 ± 0.41

54.5 ± 0.15

16

71.2 ± 0.40

70.5 ± 0.30

66.5 ± 0.31

66.2 ± 0.23

65.0 ± 0.33

60.9 ± 0.06

57.0 ± 0.32

57.0 ± 0.17

17

69.4 ± 0.21

66.0 ± 0.16

62.3 ± 0.45

59.0 ± 0.09

59.3 ± 0.24

59.3 ± 0.32

59.0 ± 0.05

51.6 ± 0.32

18

68.8 ± 0.06

58.9 ± 0.17

55.5 ± 0.30

53.9 ± 0.20

50.4 ± 0.31

50.0 ± 0.40

49.2 ± 0.09

67.6 ± 0.21

19

69.9 ± 0.05

68.0 ± 0.21

67.0 ± 0.31

67.1 ± 0.22

68.2 ± 0.09

68.3 ± 0.26

68.9 ± 0.17

54.4 ± 0.33

20

68.0 ± 0.15

60.9 ± 0.18

60.0 ± 0.09

59.4 ± 0.12

56.6 ± 0.47

56.0 ± 0.06

55.7 ± 0.27

47.0 ± 0.20

21

69.4 ± 0.50

55.9 ± 0.45

46.7 ± 0.30

45.0 ± 0.30

44.0 ± 0.24

44.2 ± 0.22

45.9 ± 0.40

57.1 ± 0.14

22

69.3 ± 0.30

65.0 ± 0.08

62.9 ± 0.30

58.1 ± 0.50

57.4 ± 0.06

57.0 ± 0.31

59.3 ± 0.16

66.8 ± 0.31

23

67.8 ± 0.31

64.6 ± 0.22

64.0 ± 0.06

56.6 ± 0.31

55.2 ± 0.21

60.8 ± 0.22

63.5 ± 0.40

56.8 ± 0.20

24

69.0 ± 0.16

65.4 ± 0.07

59.8 ± 0.21

52.3 ± 0.30

50.1 ± 0.20

50.0 ± 0.21

55.5 ± 0.30

57.3 ± 0.20

25

68.9 ± 0.22

66.6 ± 0.18

60.7 ± 0.16

54.9 ± 0.20

53.0 ± 0.20

53.2 ± 0.31

51.2 ± 0.40

52.0 ± 0.21

26

68.2 ± 0.40

54.7 ± 0.09

48.3 ± 0.23

47.2 ± 0.30

45.0 ± 0.21

52.2 ± 0.30

51.4 ± 0.30

57.7 ± 0.40

27

70.2 ± 0.21

64.0 ± 0.34

60.6 ± 0.32

58.2 ± 0.16

58.6 ± 0.21

58.0 ± 0.26

70.2 ± 0.19

44.0 ± 0.24

28

66.7 ± 0.04

47.0 ± 0.30

50.2 ± 0.30

49.0 ± 0.31

48.2 ± 0.30

44.2 ± 0.20

43.3 ± 0.50

35.6 ± 0.16

29b

60.5 ± 0.23

55.9 ± 0.33

31.4 ± 0.12

35.5 ± 0.15

35.3 ± 0.23

35.3 ± 0.33

35.5 ± 0.34

35.6 ± 0.22

  1. aAbiotic control
  2. bIsolate reducing surface tension to 31.4 mN/m, the lowest value amongst all isolates