The
gum
exudate
of
Sterculla
urens
was
deacetylated
and
purified
by
dissolution
in
sodium
hydroxide
solution
(or
in
aqueous
ammonia)
and
precipitation
with
ethanol
acidified
with
concentrated
hydrochloric
acid.
The
purified
gum
had
[<l]d
+62
and
galaoturonio
acid,
glucuronic
acid,
galactose,
rhamnose
and
a
trace
of
arabinose
as
component
sugars.
The
purified
gum
was
examined
for
heterogeneity
by
the
various
available
methods.
The
results
obtained
indicated
the
presence
of
a
homogeneous
polymer
