This study was conducted to determine the effects of addition of porcine blood
plasma (PBP) to the emulsified pork batter as a substitute for the soy protein
isolate (SPI) or sodium caseinate (SC) on the emulsion stability and
physicochemical and textural properties of the emulsified pork batter. A total
of 10 treatments were no addition and 0.5%, 1.0%, and 1.5% addition with each of
SPI, SC, and PBP. The moisture and fat losses of the pork emulsion after cooking
decreased with increasing percentage of any of SPI, SC, and PBP
(
p
< 0.05). Further, moisture loss was less for the
PBP treatment than for SPI and SC (
p
< 0.05). The
lightness, redness, and whiteness of the emulsified pork batter decreased
(
p
< 0.05) due to any of the SPI, SC, and PBP
treatments whereas the yellowness and the chroma and hue values increased. The
lightness, redness, yellowness, and chroma and hue values differed also among
the SPI, SC, and PBP treatments (
p
< 0.05); however, the
numerical difference between any two types of substitutes was less than 8% of
the two corresponding means in all of these variables. Textural properties,
including the hardness, cohesiveness, springiness, gumminess, chewiness, and
adhesiveness, were not influenced by any of the SPI, SC, and PBP treatments
(
p
> 0.05), except for greater gumminess and
chewiness for the PBP treatment than for SC. The present results indicate that
PBP is comparable or even superior to SPI or SC in its emulsion-stabilizing
effect and therefore could be used a substitute for the latter as a non-protein
ingredient of pork emulsion batter.