The materials examined in this research were characterized
by X-ray powder diffraction (XRPD) to identify crystalline
form (results not shown). The XRPD patterns demonstrated
that genistein is the only crystalline form documented in the
literature,
33
griseofulvin is Form I,
34
indomethacin is the
(
form,
35
"
-lactose monohydrate is the only known polymorph of
the anomer, erythromycin A dihydrate is the channel hydrate
form,
36
and PVP K29-32 is amorphous.
To illustrate the basic dataset used in the analysis, the wa-
ter sorption isotherms for genistein are given in Figure 1a.
The error bars are one standard deviation for three repetitions.
Genistein is the lowest water sorbing material in these ex-
periments and illustrates that the measurements were able to
quantify water sorption isotherms as a function of the temper-
ature range examined, 5
◦
C–35
◦
C, within the variation of the
experiments.