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1.5.7. Shape and extension of amyloses and amylopectins
in
solution.
Many research groups have studied the R
G
-M and [
η
]-M relationships for
dissolved starches. One example is a study of amyloses (Nakanishi et al.,
1993):
Here, the amyloses are dissolved in dimethyl sulfoxide (DMSO). DMSO is a
good solvent for amylose, as indicated by A
2
values in the range 10
-4
to 10
-3
ml mol g
-2
:
Note that A
2
depends on the molecular weight, in accordance with theory.
<S
2
> =
R
G
2