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Table 1 Dissolved oxygen (DO) levels in 10% Hoagland’s solution generated by oxygen (O 2 ) or nitrogen (N 2 ) bubbling

From: Oxygen stress reduces zoospore survival of Phytophthora species in a simulated aquatic system

O2bubbling at 0.5 L min-1

N2bubbling at 0.4 L min-1

Time (Sec)

Assigned time segment value (x)

Measured DO (mg L-1)y

SD

Predicted DO increase within time segment (y)Z

Predicted total DO in solution

Time (Min)

Measured DO (mg L-1)

SD

0

0

5.6

0.2

-

5.6

0

5.3

0.1

15

1

8.8

0.0

3.2

8.8

2

2.0

0.0

30

2

11.2

0.2

2.5

11.3

5

1.2

0.0

45

3

13.4

0.3

2.1

13.4

10

0.9

0.1

60

4

15.2

0.2

1.8

15.4

20

0.9

0.0

75

5

16.7

0.2

1.6

16.7

30

1.0

0.1

90

6

Out of range

ND

1.4

18.1

   

120

8

Out of range

ND

1.1

19.2

   

150

10

Out of range

ND

0.9

20.1

   
  1. yThese numbers are meter readings and the meter cannot measure dissolved oxygen above 18.0 mg L-1.
  2. ZThese values are calculated based on a regression model: y = 3.2 - ln (x), as generated from the SAS analysis.