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Table I.
Physicochemical characteristics of milk samples during dialysis against a weak cation exchanger. D2 and D3 are two repetitions of the dialysis experiment. tdialysis, time of dialysis; WP, whey proteins; tgel, gelation time; pHgel, gelation pH; tanδmin, minimum value of tanδ just after gelation; tanδ800, tanδ at 800 min; Δtan, difference between maximal and minimal value of tanδ; G′800, G′ at 800 min; tanδ800, tanδ at 800 min.
tdialysis (h) |
ζ-potential (mV) |
Casein (g·kg−1) | WP (g·kg−1) | NPN (g·kg−1) | tgel (min) | pHgel | tanδmin | tanδ800 | Δtan | G′800 (Pa) | tanδ800 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
NH* | H* | ||||||||||||
D2 | 0 | −20.4 ± 0.9aAχ | −18.3 ± 0.3aBε | 39.37 ± 1.04 | 8.55 ± 0.10 | 2.37 | 209.5 | 5.33 | 0.338 | 0.406 | 0.070 | 854 | 0.2161 |
14.5 | −19.8 ± 0.8abA | −17.1 ± 0.7bB | 39.34 ± 0.01 | 8.30 ± 0.10 | 2.14 | 225.6 | 5.31 | 0.375 | 0.453 | 0.078 | 643 | 0.2447 | |
22.08 | −18.9 ± 0.8bdA | −15.6 ± 0.6cB | 34.64 ± 0.07 | 8.00 ± 0.03 | 2.00 | 226.1 | 5.40 | 0.393 | 0.467 | 0.074 | 619 | 0.2411 | |
38.42 | −16.8 ± 0.8ceA | −15.3 ± 0.5cB | 33.91 ± 0.24 | 8.53 ± 0.01 | 1.67 | 247.8 | 5.41 | 0.417 | 0.492 | 0.075 | 650 | 0.2516 | |
43.08 | −17.8 ± 0.7deA | −15.9 ± 0.5cB | 33.79 ± 0.24 | 8.81 ± 0.04 | 1.34 | 240.0 | 5.34 | 0.429 | 0.500 | 0.071 | 714 | 0.2462 | |
D3 | 0 | −18.5 ± 0.5aAφ | −17.0 ± 0.8aBλ | 36.12 ± 4.23 | 9.47 ± 0.02 | 2.23 | 215.7 | 5.34 | 0.336 | 0.406 | 0.070 | 839 | 0.2215 |
14.25 | −18.7 ± 0.8aA | −17.4 ± 1.1aA | 35.10 ± 0.10 | 8.93 ± 0.03 | 1.90 | 228.7 | 5.57 | 0.384 | 0.453 | 0.069 | 764 | 0.2453 | |
21.75 | −18.5 ± 0.7aA | −16.2 ± 0.7aB | 34.82 ± 3.89 | 8.86 ± 0.01 | 1.80 | 237.5 | 5.16 | 0.398 | 0.470 | 0.073 | 651 | 0.2421 | |
38.26 | −17.5 ± 0.8bA | −14.4 ± 0.9bB | 33.70 ± 4.08 | 8.59 ± 0.01 | 1.57 | 358.1 | 5.10 | 0.447 | 0.513 | 0.066 | 702 | 0.2735 |