Low-voltage electrical stimulation effects on proteolysis and lamb tenderness

S. Lee, P. Polidori, R. G. Kauffman, B. C. Kim

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Lamb carcasses were subjected to low-voltage electrical stimulation (ES; 28 V, 60 Hz) within 5 min postmortem (PM). After ES, the longissimus thoracis (LT) and semimembranosus (SM) muscles were removed to investigate subsequent biochemical changes. The pH values of the ES muscles declined rapidly until the 1(st) 3 h PM (p < 0.05). The activities of μ-calpain and calpastatin in ES muscles decreased significantly after 10 h PM (p < 0.05). Both ES LT and SM muscles tended to have lower shear-force values, which suggested ES might accelerate activation of calpains as well as glycolytic rate, thereby improving muscle tenderness. Differences in titin and troponin-T degradation between treatments were also observed with time PM.

Original languageEnglish
Pages (from-to)786-790
Number of pages5
JournalJournal of Food Science
Volume65
Issue number5
DOIs
Publication statusPublished - 2000

Keywords

  • Calpains
  • Glycolytic rate
  • Low-voltage electrical stimulation
  • Tenderness
  • Titin
  • Troponin-T

ASJC Scopus subject areas

  • Food Science

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