THE OPTICAL-ROTATION OF ORDERED CARRAGEENANS

The optical rotation of carrageenan is modeled as a function of chain conformation, by application of the MOLROT algorithm. As with agarose, previously studied, the optical rotation observed for gels is adequat ely accounted for by a variant of the chain geometry found in the fibe r x-ray diffraction based model, albeit one with a smaller chain exten sion. Also as with agarose, the coil rotation indicates the presence o f chain segments which are locally almost fully extended. Copyright (C ) 1996 Elsevier Science Ltd