A thermodynamic model of hysteresis in phase reactions based on regular solution theory is developed by invoking metastabilities. The effect of enthalpy and entropy change, pressure, temperature, and interaction energy on the hysteresis curve term is explored. The influence of a variation of the interaction term with temperature and composition is also studied. Observed hysteresis for the phase reactions Tb,Ol,P712Tb,03 + 3/40, and Pr9016 P 9/7Pr,012 + 2170, is discussed and the theory is applied to each case. The experimental details of data acquisition and the observed hysteresis in the praseodymium oxide reaction are given.
gested that this quenching takes place by metal ions situated at any of the 6 nearest phosphate groups to ethidium bromide excited state. The 6 nearest phosphate groups to intercalated ethidium bromide are the 2 adjacent groups and the 4 groups one base pair away. The distance between the ethidium bromide and a metal
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