The variaton of micrographical structures of myofibrils of bovine and mutton muscle treated with hydrostatic high-pressure precessing was studied.Under the conditio of pressure level 7000atm,duralion time 20 min an room temperature,samples had much different micrographical structures of myofibrils compared with contral groups by using Transmissin electron micrograph.The contraction rate of bovine sarcomere was 34.8%,the rate for the mutton sarcomere was 33.3%.Meanwhile,the I band,M line and Z line of myofib...