Skip to main content

Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Table 1 Proximate composition of FDC, roe alkaline insolubles (RAIs) as 2’nd byproducts and roe protein isolates (RPIs) by isoelectric solubilization and precipitation (ISP) process

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

Sample Yielda (g) Protein yieldb (g) Moisture (%) Protein (%) Lipid (%) Ash (%)
FDC 25.3 18.3 4.3 ± 0.1de 72.3 ± 0.4h 10.6 ± 0.1b 5.7 ± 0.5a
      
RAI-11 8.7 7.1 6.5 ± 0.1b 82.5 ± 0.2d 10.2 ± 0.1bc 2.0 ± 0.0d
RAI-12 8.0 5.9 10.1 ± 0.2a 73.7 ± 0.2g 13.1 ± 0.5a 2.3 ± 0.1d
      
RPI-1 12.6 10.1 4.7 ± 0.1cd 87.8 ± 0.7b 6.1 ± 0.2d 3.8 ± 0.2b
RPI-2 11.6 9.7 3.4 ± 0.1e 83.2 ± 0.7e 7.4 ± 0.1c 3.2 ± 0.1c
RPI-3 14.1 11.1 2.3 ± 1.5ef 79.1 ± 0.5f 5.6 ± 0.1d 3.2 ± 0.3c
RPI-4 13.4 10.6 5.0 ± 1.8c 79.6 ± 0.7f 6.3 ± 1.0d 3.0 ± 0.1c
      
Casein - - 4.0 ± 0.2d 85.5 ± 0.0c - -
Hemoglobin - - 2.0 ± 0.0f 94.4 ± 0.4a - -
  1. FDC freeze-dried concentrate; RAI-11 and RAI-12, roe alkaline insolubles after alkaline solubilization at pH 11 or 12 respectively. RPI-1 and RPI-2, roe protein isolate adjusting at pH 4.5 and 5.5, respectively, after alkaline solubilization at pH 11; RPI-3 and RPI-4, roe protein isolate adjusting at pH 4.5 and 5.5, respectively, after alkaline solubilization at pH 12
  2. Data are given as mean values ± SD (n = 3)
  3. Means with different letters within the same column are significantly different at P < 0.05 by Duncan’s multiple range test
  4. -; not determined
  5. aYield is weight (g) of roe protein isolate obtained from 100 g of raw YTR
  6. bProtein yield (g) = yield x protein (%)