Effects of moisture enhancement, enzyme treatment, and blade tenderization on the processing characteristics and tenderness of beef semimembranosus steaks

The individual and combined effects of moisture enhancement with a salt/phosphate solution (ME), blade tenderization (BT), and enzyme injection with proteinases derived from Aspergillus oryzae or Bacillus subtilis on cooking properties. Warner-Bratzler shear force (WBSF), and sensory characteristics of beef semimembranosus were investigated. ME significantly (P<0.01) reduced WBSF and increased (P<0.05) sensory scores for juiciness and tenderness. BT increased (P<0.05) initial and overall tenderness scores and made connective tissue less perceptible. BT combined with ME resulted in the highest initial and overall tenderness scores, however, combining ME with either proteinase was as effective for reducing WBSF and increasing tenderness, particularly at 20 (vs. 10) ppm enzyme inclusion. Tenderness of enzyme-injected steaks was increased without compromising other palatability attributes. All treatments increased the frequency of steaks rated slightly tender or higher, with the ME + BT combination, or ME with inclusion of 20 ppm of either proteinase, being most effective. (C) 2010 The American Meat Science Association. Published by Elsevier Ltd. All rights reserved.