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

pH

IS

6.61 ± 0.110 ^ay

5.87 ± 0.111^by

5.89 ± 0.140^by

5.88 ± 0.102^by

<.0001

GM

6.34 ± 0.031^ax

5.60 ± 0.101^bx

5.60 ± 0.310^bx

5.59 ± 0.221^bx

0.001

0.091

P value

0.012

0.001

0.012

0.021

Glycogen (mg/g)

IS

1.35 ± 0.010^a

0.68 ± 0.023^by

0.64 ± 0.011^by

0.65 ± 0.010 ^by

<.0001

GM

1.30 ± 0.030^a

0.58 ± 0.012^bx

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 ± 0.342^c

4.67 ± 0.481^b

6.05 ± 0.731^ay

<.0001

GM

-

2.80 ± 0.110^c

3.98 ± 0.210^b

4.72 ± 0.140^ax

<.0001

0.104

P value

0.090

0.080

0.023

Cooking loss (%)

IS

38.22 ± 0.532^ax

33.27 ± 0.230^bx

34.54 ± 0.682^b

34.48 ± 0.920^b

<.0001

GM

42.12 ± 0.651^ay

37.87 ± 0.471^by

36.67 ± 0.701^b

36.79 ± 0.991^b

0.0431

0.120

P value

0.029

0.014

0.072

0.064

Shear force (kg)

IS

1.21 ± 0.011^ax

0.89 ± 0.042^bx

0.83 ± 0.011^bcx

0.77 ± 0.020^c

0.0275

0.224

GM

1.32 ± 0.041^ay

0.94 ± 0.021^by

0.88 ± 0.012^bcy

0.80 ± 0.042^c

<.0001

P value

0.023

0.015

0.016

0.201

Lightness (L*)

IS

32.64 ± 0.470^b

33.26 ± 0.850^b

37.77 ± 1.152^a

37.52 ± 0.464^a

0.004

0.126

GM

34.04 ± 0.220^b

34.98 ± 0.111^b

37.22 ± 1.201^a

38.02 ± 1.013^a

0.002

P value

0.061

0.258

0.078

0.069

Redness (a*)

IS

13.24 ± 0.221^ay

14.12 ± 0.261^ay

10.70 ± 0.690^b

8.83 ± 0.180^cx

<.0001

0.113

GM

11. 20 ± 0.142^ax

12.02 ± 0.111^ax

10.23 ± 0.160^b

9.45 ± 0.171^cy

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 ± 0.143^ay

2.94 ± 0.072^ay

2.74 ± 0.083^b

2.68 ± 0.111^b

0.020

0.156

GM

2.89 ± 0.110^ax

2.80 ± 0.122^ax

2.71 ± 0.041^b

2.60 ± 0.122^b

0.013

P value

0.032

0.022

0.091

0.213

Metmyoglobin (%)

IS

2.83 ± 0.252^d

7.19 ± 0.391^c

12.77 ± 0.480^b

20.47 ± 0.571^ay

<.0001

0.120

GM

2.91 ± 0.433^d

7.39 ± 0.222^c

12.35 ± 0.232^b

18.99 ± 0.110^ax

0.002

P value

0.156

0.412

0.210

0.046

MRA¹ (nmol/min/g)

IS

200.06 ± 2.081^a

189.50 ± 5.001^ab

180.44 ± 6.562^b

169.08 ± 4.920^c

0.043

0.189

GM

212.77 ± 3.112^a

200.45 ± 3.232^b

190.22 ± 4.113^c

151.90 ± 3.120^d

0.004

P value

0.216

0.120

0.147

0.548