الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
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waS 11.09 % - 13.20 % in all treatments. Stearic ranged
from 2.43 % to 2.91 % ,while unsaturated tatty
acids ranged from 83.65% to 86.00~ !he principal fatty
acid waS linoleic as it ranged from 58.67% to 63.02 %
while oleic ranged from 10.13% to 18.20% and linolenic
from 3.39% to 4.77%. In treatment, 4 (soaked seeds oil)
palmitoleic and heptadecenoic were detected,their relative
percentages were 0.97% and 5.45% respectively.
3- The unsaponiflable matter constituents were fractionated
using column chromatographic, neutral aluminum oxide
for non polar and polar fractions. The highest percentage
of non polar fraction in the case of the oil from
soaked seeds in boiling water was 74.45%, while it
was 28.08.; 16.87% and 14.12% in crude soybean oil ;
degummed oil and roasted seeds oil. Total unsaturated
hydrocarbons as squalene was determined, its concentration
was 15.86 mg./IOO g. oil in crude soybean oil t
while degummed 011 and roasted seeds oil contain 23.38
and 20.77 mg./IOO g. oil, it was not detected in the
case of oil frca .oaked -seeds in boiling water’.·
4- The unsaponifiable matter of soybean oils were identified
by G.L.C. and the unsaponifiable in crude soybean
oil contained 43.61% hydrocarbons, C2? was a major hydrocarbon
compound, 1IIhichamount:ed to 25.52%, while squalene
compound was 7. 67.~.other hydrocarbon compounds °22;°23;
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025; 029; 0;1 and 032 were detected and their relative
percentages were 1.65%; 1.68%; 1.91%; 2.01; 0.75% and
0.75 % respectively. The relative percentage of hydrocarbOni
decreased from 43.61% in crude oil to 37.4~nd
20.75% in both degUmmed oil and roasted seed oil respectively,
while total hydrocarbons increased in
case of soaked seeds oil in boiling water, it increased
to 86.71%. The relative percentage of C27 decreased
from 25.52% in crude oil to 2.65%; 1.7;% and 21.58 %
in degummed oil; roasted seeds all and soaked seeds oil
respectively. ’Moreover degummed all and roasted seeds
oil increased the relative percentage of squalene to
29.18 % and 16.58%, while it was not detected in the
case of soaked seeds oil in boiling water. 022; C23snd
025 hydrocarbon compounds, increased to 20.41%, 20.41%
and 11.62% respectively for soaked seeds oil. 028 was
detected only in oil of roasted and soaked seeds.
The relative percentage of ~-tocopherol was 3.27 % ;
3.50; 4~40 % and 0.66 respectively.
The unsaponifiable of crude oil contained 53.11 % sterols,
fractionated to B-sltostero1, the. JD.8jorsterol compound,
it waS 34.40% of UD88ponlfiable; caapesterol was found
in a moderate conteat 8.30’1 while cholesterol,stigmasterol,
?
unknown and ~ -aveaasterol were found also. Degummed oil
and roasted seeds 011 8h0W84 1Do:Naa~ o:f.. to’taJ. sterol.
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from 53.11 % in the crude oil to 62.06 % and 74.84 respectively,
while in oil of soaked seeds it decreased to
12.61%. B-si tosterol increased to 39. 73/~ and 46.20% for
degummed oil and roasted seeds oil, while it decreased
to 8.96’i; in oil of’ soaked seeds in boiling water.
5- GLC headspace analysis of volatile compounds of soybean
oils were carried out. In crude oil hex-2-ena1 octanal,
heptanul und 2-octanol were identified where their
relative percentages were 82.03%,9.37%,7.03% and 1.5&%
respectively. The volatile components in degummed oil
were also identified to hexanal, which was the major compound
(73.74%). The unkno\vu was found in a moderate percentage
of 22.26%, while hex-2-enal was identified in a
lower percentage of 3.89% and 2-octanol amounted to 0.14%.
Tha oil of roasted seeds contained only pentanal,hexanal,
and hex-2-enal with relative percentages 80.91;, 18.277~
and 0.80% respectively. In oil obtained from soaked seeds,
the major compound was hex-2-enal which reached 84.)8 %,
while heptanel, pen.anal and 2-octanol amounted to 1.86,
7.52 and 0.22% resp.ctively.
6- The stability of soybean oils was evaluated by the oven
test at 6)Oc. The longest induction period was detected
in case of roasted .oybean seeds 011 as it was 12 days,
while the shortest induction period was observed in case
of degl.1mlledsoybean oil. ».reover crude soybean oil end
the oil fram soaked seeds in boiling w~ter had an induction
period of 9 ant 10 days respectively.