Electron microscopy of contractile bands in low voltage electrical stimulation beef
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Updated: May 27, 2026

Isolating Myofibrils from Skeletal Muscle Biopsies and Determining Contractile Function with a Nano-Newton Resolution Force Transducer
Published on: May 7, 2020
Xin Luo1, Yan Zhu, Guanghong Zhou
1College of Food Science and Technology, Shandong Agricultural University, No. 61, Daizong Street, Taian, Shandong Province 271018, PR China.
Abstract:
This study was designed to explore the effects of low voltage electrical stimulation and delay chilling on the ultrastructure of beef longissimus muscle. The results showed that 44.9% of sarcomeres in the ES samples had contractile zones, and 16.9% of sarcomeres adjacent to contractile zones were stretched in 100 views of electron microscopy. The ultrastructures of 60.9% of sarcomeres changed when the samples were electrically stimulated and then delay-chilled. Contractile bands play an important role in meat tenderization during postmortem aging.
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