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Table 2 Apple juice color values before and after the treatmentsa

From: Microbial inactivation and shelf life of apple juice treated with high pressure carbon dioxide

Pressure (MPa)

T (°C)

Time (min)

L* Untreated

L* Treated

a* Untreated

a* Treated

b* Untreated

b* Treated

ΔE

HPCD treatments

7.0

35

150

49.17b

-0.87c

2.77c

48.03c

-0.87d

-0.83f

-0.83c

2.93c

1.15e

2.77g

2.93h

1.15l

13.0

35

150

49.50b

-0.80c

2.77c

48.70d

-0.87d

-0.80e, f

2.87c

0.83e

2.77g

2.87h

0.83l

13.0

50

80

49.73b

-0.87c

2.73c

48.53d

-0.87d

-0.87e, f

2.73g

2.47i

1.24l

16.0

50

80

49.17b

-0.97c

2.77c

48.77d

-0.97d

-0.83e, f

2.77g

2.33i

0.62l

16.0

60

40

49.17b

-0.97c

2.77c

48.67d

-0.97d

-0.87e, f

2.77g

2.33i

0.68l

Thermal treatment

-

85

60

49.5b

48.10c

-0.87d

-0.90e

2.77g

2.47i

1.44l

Sixth compression and decompression cycle

13.0

35

10

49.17b

48.57d

-0.93d

-0.87e, f

-0.87bc

2.83bc

0.62be

2.73g

2.83h

0.62l

  1. aValues are means and represent the trends seen for 3 processing runs.
  2. The same superscripts in a column are not significantly different (p < 0.05).