超高压对草鱼肌肉超微结构与质构特性的影响

EFFECTS OF HIGH PRESSURE ON THE ULTRASTRUCTURE AND TEXTURAL PROPERTY OF GRASS CARP MUSCLE

研究了等静超高压（２００ＭＰａ，１５ｍｉｎ）对草鱼肌肉超微结构与质构特性的影响，并与猪肌肉作对照。结果表明：１．加压处理的草鱼肌肉，其超微结构中出现较明显的变化，如肌原纤维中Ａ带和Ｉ带的细丝均被破坏，粗丝相互聚集，出现间隙，Ｚ线变粗、不连续，Ｈ带和Ｍ线消失等，但肌原纤维的外形仍保持完整。２．加压处理的草鱼肌肉，其外观无显著变化，色泽稍白，略有汁液流出，但质构特性与处理前无明显差别。

The effect of high hydrostatic pressure (200 MPa, 15 min) on the ultrastructure andtextural property of grass carp muscle was studied in comparison with those of pork muscle. The resultshow that: 1. The ultrastructure of grass carp muscle pressed with a high pressure exhibited suchsignificant changes as Z-line broadened, H-zone and M-line blurred in vision,myofilaments loosenedwith interstices viewed in the longitudal section, etc. However, the profile and light-dark fringe ofmuofibril remain inthct;2. The grass carp muscle subjected to a high pressure showed more white inmuscle color than the unpressed one, while the drips exuded in small quantity. Nevertheless, thetextural property of carp muscle showed no significant change.