ความเห็นเพิ่มเติมที่ 5 18 ก.ค. 2554 (15:49)
ขอบคุณครับ อ.ศานติ
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Abstract
Watermelon seed oil characteristics were
evaluated to determine whether this oil could be exploited
as an edible oil. Hexane extraction of watermelon seeds
produced yields of 50% (w/w) oil. The refractive
index,
saponification and iodine value were 1.4712
(at 25 0C),
200 mg KOH/g and 156 g I/100 g, respectively. The acid
and peroxide values were 2.4 mg KOH/g and 3.24
mequiv/kg, respectively. The induction time of the oil was
also 5.14 h at 110 0C, which was measured for the first
time. Total unsaturation contents of the oil was 81.6%,
with linoleic acid (18:2) being the dominant fatty
acid
(68.3%). Considering that the
watermelon seed oil was
highly unsaturated, the relatively high induction time might
indicate the presence of natural antioxidants. In addition,
the influence of extraction parameters on extraction of oil
from watermelon seed with hexane as a solvent was studied
at several temperatures (40, 50,
and 60 0C), times (1, 2,
and
3 h) and solvent/kernel ratios (1:1,
2:1, and 3:1). The oil
yield was primarily affected by the solvent/kernel ratio and
then time and temperature, respectively. The protein content
of the oil-free residue was 47%.
krutank 
ร่วมแบ่งปัน153 ครั้ง - ดาว 158 ดวง
ตอบแล้ว:
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