Drip production in meat refrigeration 23 Fig 2.1 Diagrammatic representation of cut surface of muscle to show bundles of fibres(source: Voyle, 1974) 腫‖D Fig 2.2 Single muscle fibre Diagrammatic representation of morphology as seen by direct microscopy(source: Voyle, 1974). sents a single muscle fibre in cross-section, showing myofibrils and asso ated structures that are referred to below Each myofibril is enwrapped in a thin vesicular structure the sarcoplas- mic reticulum, which is involved in the transmission of the nervous impulse to the contractile elements. The characteristic striated appearance of each muscle fibre, represented in Fig. 2. 2, may be observed by direct microscopy The finer details of structure, represented in Figs 2.3-2.4, can only be resolved by electron microscopy Between the myofibrils are small particles, the mitochondria, which provide the energy for contraction via oxidative processes. The myofibrils are bathed in a fluid, the sarcoplasm, which contains many soluble enzymes. These are mostly concerned with the process of glycolysis by which lactic acid is produced in the oxygen-free post-mortem muscle. The myofibrils occupy about 74% of the total fibre volume. The myofibrils are packed with contractile microfilaments of actin and myosin which, in cross-section, may be seen to be arranged in a hexagonal lattice. The interdigitating sliding action of these filaments when stimulated to contract is suggested by the longitudinal view represented in Fig. 2.3.A fibril contains about 16% contractile protein and about 84% water in which are dissolved small solutes such as adenosine triphosphate(ATP),sents a single muscle fibre in cross-section, showing myofibrils and associ￾ated structures that are referred to below. Each myofibril is enwrapped in a thin vesicular structure the sarcoplas￾mic reticulum, which is involved in the transmission of the nervous impulse to the contractile elements. The characteristic striated appearance of each muscle fibre, represented in Fig. 2.2, may be observed by direct microscopy. The finer details of structure, represented in Figs 2.3–2.4, can only be resolved by electron microscopy. Between the myofibrils are small particles, the mitochondria, which provide the energy for contraction via oxidative processes. The myofibrils are bathed in a fluid, the sarcoplasm, which contains many soluble enzymes. These are mostly concerned with the process of glycolysis by which lactic acid is produced in the oxygen-free post-mortem muscle. The myofibrils occupy about 74% of the total fibre volume. The myofibrils are packed with contractile microfilaments of actin and myosin which, in cross-section, may be seen to be arranged in a hexagonal lattice. The interdigitating sliding action of these filaments when stimulated to contract is suggested by the longitudinal view represented in Fig. 2.3. A fibril contains about 16% contractile protein and about 84% water in which are dissolved small solutes such as adenosine triphosphate (ATP), Drip production in meat refrigeration 23 Fig. 2.1 Diagrammatic representation of cut surface of muscle to show bundles of fibres (source: Voyle, 1974). Fig. 2.2 Single muscle fibre. Diagrammatic representation of morphology as seen by direct microscopy (source: Voyle, 1974)