Abstract:
Two processed A.seyal and A.senegal samples of gum arabic have
been studies in order to establish the physico chemical properties and
functionality of processed gum samples in comparison with unprocessed
gum arabic. Some of the determined physico - chemical properties have the
following values :
Moisture content : Moisture content for processed A.seyal was found
to be 7.3% where as that for A.senegal was 7.6% , which differe from the
values reported by other authors for non-processed A.seyal gum , which
were 8.5% , 12.6% , and 11.6% the value for non-processed A.senegal gum
were 10.7% , 11.8% and 14.8 % .
Ash content : Ash content for processed A.seyal& processed A.senegal was
found to be 0.25 %and 0.34% respectivly. which differe from the values
reported by other authors for non-processed gum which were , 2.74 , 2.9% ,
0.7% for non-processed A.seyal and 6.5% , 2.6%, 3.9% for non processed
A.senegal.
Intrinsic viscosity : Intrinsic viscosity for processed A.seyal and Asenegal
was found to be 11.5ml/g and 14.5ml/g respectively these values were
similar to the values of non-procsessed samples which were found to be
11.4ml/g , 14.2ml/g . for non-processed A.seyal and14.6 ml/g , 16.4 ml/g for
non-processed A.senegal .
Specific optical rotation : A.seyal , processed sample has specific rotation
ranging from +49.7 to + 50.2 . The average value was +49.9. and the value
)
(3
for A.senegal , processed sample was found to be -29.2 which agrees with
the values reported by other authors for non-processed sample which were
+49.4 , +51 , + 54 . for A.seyal and -26 , -31.3 , -29.4 for non-processed
A.senegal.
Nitrogen Content :
The nitrogen content for. Aseyal gum was found to be
≈
where as
that for A.senegal gum was found to be 0.34% which does not differe from
the values reported by other authors for non-processed gum , which were
0.13 , 0.11 and 0.33 , 0.35 respectively .
Theacid equivalent weight and glucuronic acid:
For processed A.seyal gum were found to be 1154 and 16.8% respectively
, where as those for processed A.senegal were 1315.8 and 14.7.
pH values :
The pH values for processed and row gum were almost equales ,
hence processed dose not affect the pH value of the gum .
Emulsifing Index :-
The relative emulsifying abilities of processed gum does not changed
by the treatments.
Conductance :
Spraydring processed has affected the conductance at infinite dilution
for A.seyal was found to be
where as that of A.senegal was
Which was different from those values reported for non-processed samples
which were found to be
sample .
for A.seyal and
for A.senegal
