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Table 5 Mineral contents (mg/100 g of sample) of FDC, RAIs and RPIs prepared by ISP process and positive controls

From: Preparation and characterization of protein isolate from Yellowfin tuna Thunnus albacares roe by isoelectric solubilization/precipitation process

Sample FDC RAI-11 RAI-12 RPI-1 RPI-2 RPI-3 RPI-4 Casein Hb
Moisture (%) 4.3 6.5 10.1 4.7 3.4 2.3 5.0 4.0 2.0
K 1179.9 ± 8.3a 108.9 ± 3.9d 130.6 ± 0.6c 36.2 ± 1.7g 57.5 ± 1.3f 51.6 ± 1.7f 68.5 ± 4.9e 912.0 ± 12.3b 71.4 ± 3.0e
S 992.3 ± 92.6b 591.4 ± 33.4e 627.9 ± 40.9cde 609.2 ± 40.9de 715.7 ± 26.9c 664.1 ± 75.0cde 698.9 ± 73.9cd 1984.1 ± 3.2a 442.0 ± 46.2f
Na 376.2 ± 2.1b 213.0 ± 3.6e 303.3 ± 3.7c 78.2 ± 0.1h 123.7 ± 1.0g 188.0 ± 2.0f 244.4 ± 4.2d 706.3 ± 10.9a 212.6 ± 1.8e
P 257.7 ± 2.8a 84.3 ± 1.5f 97.1 ± 1.4e 254.6 ± 2.5a 246.8 ± 7.8b 235.7 ± 1.2c 215.3 ± 1.6d 34.7 ± 0.4g 29.1 ± 0.3h
Mg 66.8 ± 0.4a 23.4 ± 0.2d 51.7 ± 0.5b 6.6 ± 0.1f 32.3 ± 0.6c 4.6 ± 0.1g 21.4 ± 0.0e - -
Zn 45.0 ± 0.3b 42.8 ± 0.3c 44.4 ± 0.2b 23.2 ± 0.4d 52.1 ± 0.4a 23.0 ± 0.2d 52.6 ± 0.8a - -
Ca 33.5 ± 0.3b 39.4 ± 1.0b 37.2 ± 0.2b 7.8 ± 0.1d 15.3P ± 0.5cd 12.4 ± 0.1cd 16.5 ± 0.3cd 987.2 ± 17.3a 21.2 ± 0.2c
Fe 9.8 ± 0.1d 5.8 ± 0.1e 6.6 ± 0.1e 12.9 ± 0.3bc 11.9 ± 0.1c 13.5 ± 0.2b 13.2 ± 0.3b 4.8 ± 0.0f 250.1 ± 1.8a
Mn 0.1 ± 0.0c 0.1 ± 0.0c 0.0 ± 0.0d −0.1 ± 0.0e 0.0 ± 0.0d −0.1 ± 0.0e 0.0 ± 0.0d 4.0 ± 0.0a 0.4 ± 0.0b
  1. FDC freeze-dried concentrate; RAI-11 and 12, roe alkaline insolubles after alkaline solubilization at pH 11 and 12, respectively; RPI-1, 2, 3 and 4, roe protein isolate adjusting at pH 4.5 and 5.5, respectively after alkaline solubilization at pH 11 and 12; Hb hemoglobin
  2. Values are means ± standard deviation of triple determinations
  3. Means with different letter within the same row are significantly different at P < 0.05 by Duncan’s multiple range test
  4. -; not determined