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Biophysical Journal 22: 439-452 (1978)
© 1978 the Biophysical Society

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A study of molecular dynamics and freezing phase transition in tissues by proton spin relaxation.

S N Rustgi, H Peemoeller, R T Thompson, D W Kydon and M M Pintar

ABSTRACT

Muscle, spleen, and kidney tissues from 4-wk-old C57 black mice were studied by proton magnetic resonance. Spin-lattice relaxation times at high fields and in the rotating frame, as well as the spin-spin relaxation times, are reported as a function of temperature in the liquid and frozen phase. Motions of large molecules and of water molecules and their changes at the freezing phase transition are studied. The shortcomings of the two-state fast-exchange relaxation model are discussed.






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Copyright © 1978 by the Biophysical Society.