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Table 1 Physicochemical properties of infraspinatus (IS) and gluteus medius (GM) muscles in goats during postmortem chill storage

From: Comparison of myofibrillar protein degradation, antioxidant profile, fatty acids, metmyoglobin reducing activity, physicochemical properties and sensory attributes of gluteus medius and infraspinatus muscles in goats

   Storage time (days) P value
Parameter Muscle 0 1 4 7 Storage Muscle × storage
pH IS 6.61 ± 0.110 ay 5.87 ± 0.111by 5.89 ± 0.140by 5.88 ± 0.102by <.0001  
  GM 6.34 ± 0.031ax 5.60 ± 0.101bx 5.60 ± 0.310bx 5.59 ± 0.221bx 0.001 0.091
  P value 0.012 0.001 0.012 0.021   
Glycogen (mg/g) IS 1.35 ± 0.010a 0.68 ± 0.023by 0.64 ± 0.011by 0.65 ± 0.010 by <.0001  
  GM 1.30 ± 0.030a 0.58 ± 0.012bx 0.56 ± 0.011 bx 0.57 ± 0.012 bx <.0001 0.100
  P value 0.213 0.021 0.011 0.019   
Drip loss (%) IS - 3.55 ± 0.342c 4.67 ± 0.481b 6.05 ± 0.731ay <.0001  
  GM - 2.80 ± 0.110c 3.98 ± 0.210b 4.72 ± 0.140ax <.0001 0.104
  P value   0.090 0.080 0.023   
Cooking loss (%) IS 38.22 ± 0.532ax 33.27 ± 0.230bx 34.54 ± 0.682b 34.48 ± 0.920b <.0001  
  GM 42.12 ± 0.651ay 37.87 ± 0.471by 36.67 ± 0.701b 36.79 ± 0.991b 0.0431 0.120
  P value 0.029 0.014 0.072 0.064   
Shear force (kg) IS 1.21 ± 0.011ax 0.89 ± 0.042bx 0.83 ± 0.011bcx 0.77 ± 0.020c 0.0275 0.224
  GM 1.32 ± 0.041ay 0.94 ± 0.021by 0.88 ± 0.012bcy 0.80 ± 0.042c <.0001  
  P value 0.023 0.015 0.016 0.201   
Lightness (L*) IS 32.64 ± 0.470b 33.26 ± 0.850b 37.77 ± 1.152a 37.52 ± 0.464a 0.004 0.126
  GM 34.04 ± 0.220b 34.98 ± 0.111b 37.22 ± 1.201a 38.02 ± 1.013a 0.002  
  P value 0.061 0.258 0.078 0.069   
Redness (a*) IS 13.24 ± 0.221ay 14.12 ± 0.261ay 10.70 ± 0.690b 8.83 ± 0.180cx <.0001 0.113
  GM 11. 20 ± 0.142ax 12.02 ± 0.111ax 10.23 ± 0.160b 9.45 ± 0.171cy 0.002  
  P value 0.012 0.038 0.500 0.019   
Yellowness (b*) IS 13.38 ± 0.470 13.76 ± 0.150 11.64 ± 1.442 13.92 ± 0.882 0.288 0.183
  GM 13.14 ± 0.231 12.98 ± 0.712 12.47 ± 0.221 12.33 ± 0.332 0.543  
  P value 0.231 0.106 0.114 0.321   
Myoglobin (mg/g) IS 3.21 ± 0.143ay 2.94 ± 0.072ay 2.74 ± 0.083b 2.68 ± 0.111b 0.020 0.156
  GM 2.89 ± 0.110ax 2.80 ± 0.122ax 2.71 ± 0.041b 2.60 ± 0.122b 0.013  
  P value 0.032 0.022 0.091 0.213   
Metmyoglobin (%) IS 2.83 ± 0.252d 7.19 ± 0.391c 12.77 ± 0.480b 20.47 ± 0.571ay <.0001 0.120
  GM 2.91 ± 0.433d 7.39 ± 0.222c 12.35 ± 0.232b 18.99 ± 0.110ax 0.002  
  P value 0.156 0.412 0.210 0.046   
MRA1 (nmol/min/g) IS 200.06 ± 2.081a 189.50 ± 5.001ab 180.44 ± 6.562b 169.08 ± 4.920c 0.043 0.189
  GM 212.77 ± 3.112a 200.45 ± 3.232b 190.22 ± 4.113c 151.90 ± 3.120d 0.004  
  P value 0.216 0.120 0.147 0.548   
  1. a, b c means having different superscripts along the same row are significantly different (P < 0.05). x, y means having different superscripts along the same column are significantly different (P < 0.05). 1metmyoglobin reducing activity