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Stability of Cold‑Pressed Oil from Commercial Indian Niger (Guizotia abyssinica (L.f.) Cass.) Seed as affected by Blending and Interesterification.

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Relation http://ir.cftri.com/12061/
http://dx.doi.org/10.1007/s11746-015-2723-3
 
Title Stability of Cold‑Pressed Oil from Commercial Indian Niger
(Guizotia abyssinica (L.f.) Cass.) Seed as affected by Blending
and Interesterification.
 
Creator Bhatnagar, A. S.
Gopala Krishna, A. G.
 
Subject 01 Oilseeds
 
Description Blending and interesterification of cold-pressed
oil from commercially available niger (Guizotia abyssinica
(L.f.) Cass.) seeds was performed to improve its stability.
The fatty acid composition of cold-pressed niger
seed oil (NSO) revealed that it contained a huge amount
of polyunsaturated linoleic acid (69.2 %). NSO being rich
in polyunsaturated fatty acids (PUFA) was susceptible
to oxidation and hence was blended with saturated fatty
acid (SFA) rich coconut oil (CNO) and monounsaturated
fatty acid (MUFA) rich olive–pomace oil (OO) to enhance
its stability. CNO contained a total of 91.3 % of SFA,
while OO had oleic acid, C18:1 (74.3 %) as MUFA. Two
blends of NSO with CNO and OO, i.e. NSO + CNO(B)
and NSO + OO(B), were prepared in the ratio of 1:1.
The blends were further interesterified using the lipase
enzyme from Rhizomucor meihei and interesterified oils,
i.e. NSO + CNO(I) and NSO + OO(I), were obtained. The
oxidative stability of the oils was evaluated by incubating
them at 37 °C and 55 % relative humidity (RH) for a
period of 45 days. The peroxide values of NSO + CNO(B),
NSO + OO(B), NSO + CNO(I) and NSO + OO(I) showed
a reduction by 53.3, 42.6, 65.3 and 55.4 %, respectively,
while the conjugated diene values showed a reduction by
75.0, 66.9, 76.7 and 75.3 %, respectively, as compared to
NSO during the incubation period. This is probably the
first report on the stability improvement of niger seed oil
through blending and interesterification.
 
Date 2015
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://ir.cftri.com/12061/1/Journal%20of%20the%20American%20Oil%20Chemists%27%20Society%20December%202015%2C%20Volume%2092%2C%20Issue%2011%2C%20pp%201671-1680.pdf
Bhatnagar, A. S. and Gopala Krishna, A. G. (2015) Stability of Cold‑Pressed Oil from Commercial Indian Niger (Guizotia abyssinica (L.f.) Cass.) Seed as affected by Blending and Interesterification. Journal of the American Oil Chemists' Society, 92 (11). pp. 1671-1680.