Table 3. Colour, ΔE and chroma (C) values of ayran samples.
t/day | Sample | ||||||||
Ctr 1 | Ctr 2 | A5 | A5+MTG | A10 | A10+MTG | A15 | A15+MTG | ||
1 | (96.0±0.6)Ab* | (96.2±0.5)A | (94.5±1.2)B | (93.1±3.5)B | (88.6±2.2)C | (88.9±3.7)C | (84.3±0.7)D | (83.2±2.6)D | |
L* | 7 | (96.1±0.6)b | 96.1±0.4 | 93.1±0.3 | 92.5±0.7 | 90.0±0.7 | 89.0±1.9 | 85.0±0.6 | 86.8±0.8 |
15 | (94.9±0.5)a | 96.1±0.6 | 93.3±0.3 | 93.5±2.0 | 92.2±0.3 | 92.5±0.9 | 88.9±0.5 | 90.2±0.4 | |
1 | (8.4±0.2)D | (8.6±0.4)D | (11.9±1.1)C | (11.5±0.3)C | (16.5±0.3)B | (16.5±0.2)B | (18.9±1.1)A | (18.4±0.1)A | |
-a* | 7 | 8.5±0.5 | 8.7±0.8 | 11.1±1.2 | 11.0±0.9 | 14.3±0.3 | 16.4±0.6 | 18.4±1.1 | 19.0±2.6 |
15 | 8.5±0.2 | 8.6±0.4 | 11.3±0.0 | 11.3±0.3 | 14.5±0.3 | 15.1±0.9 | 18.0±0.7 | 17.7±0.9 | |
1 | (7.6±0.3)Cb | (7.7±0.1)C | (7.6±0.4)C | (7.5±0.4)C | (9.6±0.3)B | (9.8±0.5)B | (13.3±0.1)A | (14.9±0.8)A | |
b* | 7 | (7.9±0.1)b | 7.4±0.0 | 7.9±0.7 | 7.3±0.2 | 8.8±0.1 | 9.1±1.2 | 12.6±0.8 | 14.1±0.3 |
15 | (8.4±0.3)a | 8.7±0.2 | 8.6±0.1 | 8.9±0.0 | 10.0±1.0 | 10.1±0.4 | 14.5±0.6 | 14.9±0.0 | |
1 | (96.7±0.4)A | (96.9±0.4)A | (95.5±0.7)A | (94.1±2.4)A | (90.6±1.6)B | (91.0±2.6)B | (87.4±0.7)C | (86.5±1.7)C | |
ΔE | 7 | 96.8±0.5 | 96.8±0.2 | 94.1±0.3 | 93.5±0.6 | 91.6±0.6 | 90.9±1.3 | 87.9±0.5 | 89.3±0.9 |
15 | 95.7±0.4 | 96.9±0.5 | 96.4±0.2 | 94.6±1.4 | 93.8±0.1 | 94.3±0.5 | 91.8±0.3 | 93.2±0.1 | |
1 | (11.3±0.3)D | (11.5±0.3)D | (14.2±0.8)C | (13.7±0.4)C | (19.1±0.3)B | (19.2±0.1)B | (23.0±0.7)A | (23.7±0.3)A | |
C | 7 | 11.6±0.2 | 11.4±0.4 | 13.6±1.0 | 13.2±0.6 | 16.8±0.2 | 18.2±0.1 | 23.3±0.3 | 23.4±1.4 |
15 | 11.9±1.1 | 12.2±0.3 | 14.2±0.1 | 13.6±0.2 | 18.3±0.6 | 18.1±0.7 | 22.7±0.2 | 23.2±0.5 |
Mean value±S.E. (N=2) in the same column with different lowercase letters show significant differences during storage (p<0.05). Mean values in the same row with different capital letters show significant differences among samples (p<0.05). Ctr 1 and 2=samples without RWP and MTG (1) and with MTG (2) as control; A5, A10 and A15=samples with 5, 10 and 15% RWP; A5+MTG, A10+MTG and A15+MTG=samples with 5, 10 and 15% RWP and 0.5 U/g MTG; RWP=reconstituted whey powder; MTG=microbial transglutaminase