Day 0

Day 1

Day 7

Day 24

Fresh

8.19 (0.24)

27˚C

9.13 (0.95)*

9.14 (0.07)*

6.99 (0.01)*

4˚C

7.41 (0.44)

7.78 (0.61)

6.69 (0.19)*

−20˚C

8.16 (0.76)

7.06 (0.26)*

6.38 (0.07)*

−80˚C

8.01 (0.50)

7.47 (0.31)

6.31 (0.02)*