title: The spin-lattice relaxation times of water associated with early post mortem changes in skeletal muscle.
abstract: We studied the spin-echo signal of muscle water in a large time domain and found that the motion of the nuclear magnetic moment of tissue water cannot be characterized by a single spin-lattice relaxation time (T1). The relaxation time T1B, which is the T1 characterized by those protons with a slower relaxation rate, is influenced by the early post mortem changes in skeletal muscle. T1B increased with time after the tissue was taken from the animal and reached a maximum at 3 h. However, the weighted average of T1 of all water protons (T1A) did not change throughout the time course of the experiments.
mesh_terms: D000818:Animals; D001834:Body Water; D004578:Electron Spin Resonance Spectroscopy; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D009132:Muscles / Q000032:analysis* / Q000648:ultrastructure; D011180:Postmortem Changes; D051381:Rats; D013997:Time Factors