摘要
Ⅰ. INTRODUCTION Previous studies showed that the Mssbauer spectrum of Model I demonstrated two doublets: one was called S doublet and the other was named C doublet. The Q. S. and I. S. values of S doublet of Model I were quite close to the values of natural plant-type Fd (2Fe-2S). However, the natural Fd showed no C doublet in its Mssbauer spectrum. The data for magnetic susceptibility and the ESR spectrum were also different between Model I and natural Fd.
