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Effects of processing on physicochemical properties and fatty acid composition of hibiscus sabdariffa seed oil
Author(s) -
Sarojini G.,
Rao K. Chittemma,
Tulpule P. G.,
Lakshminarayana G.
Publication year - 1985
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf03028740
Subject(s) - cyclopropene , hibiscus sabdariffa , oleic acid , chemistry , refining (metallurgy) , epoxy , hibiscus , organic chemistry , fatty acid , composition (language) , stearic acid , food science , nuclear chemistry , botany , biochemistry , biology , philosophy , linguistics
Expeller pressed crude Hibiscus sabdariffa seed oil (mesta oil) is dark and most unappealing. On refining, the appearance of the oil is improved. The unusual fatty acids present in the H. sabdariffa seed oil, cyclopropene acids (malvalic C 18 H 32 O 2 and sterculic C 19 H 34 O 2 ) and epoxy oleic acid (C 18 H 32 O 3 ), are not reduced by refining. Partial hydrogenation did not reduce the epoxy oleic acid, but it eliminated the cyclopropene acids. Heating for 10 min was sufficient for complete elimination of cyclopropene acids, but heating up to 60 min did not affect the epoxy acid.