Physico-chemicalProperties Treatment no
  1 2 3 4 5 6 7 8 9
MR 28.3 ± 0.3d 23.3 ± 0.3e 18.2 ± 0.2g 17.9 ± 0.1g 30.5 ± 0.2b 24.0 ± 0.1e 29.7 ± 0.2c 33.3 ± 0.4a 20.8 ± 0.2f
MFR 0.36 ± 0.0ab 0.38 ± 0.0ab 0.17 ± 0.0d 0.15 ± 0.0de 0.27 ± 0.0c 0.33 ± 0.0bc 0.38 ± 0.0ab 0.43 ± 0.0a 0.07 ± 0.0e
FAC 0.45 ± 0.0ns 0.42 ± 0.0ns 0.42 ± 0.0ns 0.45 ± 0.0ns 0.43 ± 0.0ns 0.44 ± 0.0ns 0.42 ± 0.0ns 0.40 ± 0.0ns 0.42 ± 0.0ns
PS 0.27 ± 0.0g 0.32 ± 0.0ab 0.28 ± 0.0f 0.25 ± 0.0h 0.33 ± 0.0a 0.3 ± 0.0de  0.31 ± 0.0bc  0.3 ± 0.0cd 0.29 ± 0.0ef
MAC 0.3 ± 0.0c 0.4 ± 0.0b 0.6 ± 0.0a 0.6 ± 0.02a 0.2 ± 0.0d 0.2 ± 0.0d  0.2 ± 0.0d  0.2 ± 0.0d 0.4 ± 0.0b
TD 0.57 ± 0.0bc 0.61 ± 0.0a 0.59 ± 0.0ab 0.56 ± 0.0cd 0.53 ± 0.0d 0.58 ± 0.0abc  0.57 ± 0.0bc 0.58 ± 0.0abc 0.56 ± 0.0cd
TrD 1.38±0.1bcd 1.31±0.0bcd 1.48±0.0abc 1.29±0.0cd 1.60 ± 0.1a 1.39 ± 0.0bcd  1.22 ± 0.0d 1.30 ± 0.0bcd 1.49 ± 0.0ab
WHC 149.7±11.0b 153.1±8.0ab 165.1±4.7ab 181.7±13.2a 85.4±7.3c 156.9 ± 15.8ab 80.9 ± 6.8c  77.0 ± 5.0c 175.9 ± 7.8ab
WAI 16.1 ± 0.1bc 15.3 ± 0.2c 16.7 ± 0.2ab 16.3±0.9abc 13.9 ± 0.0d 15.8 ± 0.1bc 13.9 ± 0.2d  13.8 ± 0.3d 17.3 ± 0.3a
WSI 11.3 ± 0.2ns 11.5 ± 0.3ns 10.6 ± 0.0ns 10.9 ± 1.8ns 12.3 ± 0.1ns 10.7 ± 0.2ns 11.9 ± 0.3ns  12.6 ± 0.1ns 11.7 ± 0.3ns
BD 0.036 ± 0.0a 0.026 ± 0.0b 0.019±0.0cde 0.016±0.0de 0.022±0.0bcd 0.036 ± 0.0a 0.023 ± 0.0bc 0.025 ± 0.0b 0.016 ± 0.0e
ER IVSD 0.18 ± 0.0c
153.4 ±2.8b
0.24 ± 0.0d
157.2±1.1ab
0.29 ± 0.0b
160.7 ±0.9a
0.29 ± 0.0b
137.3 ±0.9c
0.32 ± 0.0ab
121.5 ± 0.6d
0.17 ± 0.0d
158.9 ±1.1a
0.32 ± 0.0ab
83.9 ± 1.0f
 0.34 ± 0.0a
112.7 ± 1.0e
0.24 ± 0.0c
111.7 ± 1.0e
Color (L*) 51.8 ± 0.0c 50.6 ± 0.0e 50.6 ± 0.0d 50.6 ± 0.0d 50.6 ± 0.0d 53.9 ± 0.0b 54.2 ± 0.0a 45.7 ± 0.0g 48.1 ± 0.0f
Color (a*) 2.1 ± 0.0e 1.7 ± 0.0g 2.1 ± 0.0d 2.8 ± 0.0a 1.9 ± 0.0f 2.3 ± 0.0c 2.5 ± 0.0b 1.6 ± 0.0h 1.9 ± 0.0f
Color (b*) 6.4 ± 0.0e 6.1 ± 0.0g 6.4 ± 0.0d 7.4 ± 0.0c 6.3 ± 0.0f 7.8 ± 0.0b 8.4 ± 0.0a 3.1 ± 0.0i 1.9 ± 0.0h
Values are presented as means ± standard error of triplicates except for ER and BD which are means of 10 and 20 readings respectively. Values connected by the same letter in each row are not significantly different (P<0.05). Treatments No: 1=85 rpm SS & 232.5°CBT; 2=60 rpm SS & 232.5°CBT; 3=110 rpm SS & 275°CBT; 4=85 rpm SS & 275°CBT; 5=60 rpm SS & 190°CBT; 6=110 rpm SS & 232.5°CBT; 7=85 rpm SS & 190°CBT; 8=110 rpm SS & 190°CBT; and 9=60 rpm SS & 275°C BT. SS= Screw speed, BT= barrel temperature, rpm= revolutions per minutes, and ns=not significant. Physico-chemical properties: MR=Moisture Retention (%), MFR=Mass Flow Rate (g/sec), FAC=Fat Absorption Capacity (%), PS=Protein Solubility (%), MAC=Milk Absorption Capacity (%), TD=Tap Density (g/cm3), TrD=True Density (g/mL), WHC=Water Holding Capacity (%), WAI=Water Absorption Index, WSI=Water Solubility Index (%), BD=Bulk Density (kg/cm3) and ER=Expansion Ratio, IVSD=In Vitro Starch Digestibility (μg of glucose per gram of sample). Color (L)=brightness with L=100 is white and L=0 is black, Color (a+)=red, Color (a-)=green, Color (b+)=yellow, and Color (b-)=blue.
Table 4: Physico-chemical Properties of the Nine extruded products