Characterization of cyclopropenoid acids in selected seed oils

Abstract

Evidence is provided that sterculie and malvalie acids occur together in seed oils of Sterculia foetida, Hibisctls syriacus~ and Lavatera trimestris. Sterctdia foetida oil contains 54.5% sterculic and 6.7% malvalic acids; Hibiscus syriacus oil contains 16.3% nmlvalic and 3.4% stereulic; and Lavatera trimestris oil contains 7.7% malvMic and 0.6% sterculie acids. H~biscus syriacus oil also contains 1.5% dihydrosterculie acid. The cyelopropenoid acids were characterized by hydrogenation in conjunction with gas-liquid chromatography and by oxidation to ~-dioxo acids with subsequent cleavage with peracetie acid. Acetolysis of epoxides in the presence of cyclopropenes was effectcd by room ten> perature treatment with acetic acid-10% sulfuric acid (5:2).

Potential of bioenergy production from industrial kenaf (Hibiscus cannabinus L.) based on Malaysian perspective

“…The oils produced by members of the Malvaceae family display unique fatty acid profile as compared to other oils [60]. Researchers reported that kenaf seed has also a potentiality to use as feedstocks for biodiesel production through trans esterification reaction [61].…”

Fatty acid profile of seashore mallow (Kosteletzkya pentacarpos) seed oil and properties of the methyl esters

“…As mentioned above, K. pentacarpos belongs to the Malvaceae family for which the existence of fatty acids with cyclic moieties in the seed oils has been well‐documented . This would indicate the presence of fatty acids with cyclic moieties in the seed oil of seashore mallow.…”

“…All reports agree that oleic acid in amounts of 11-21 wt% is the third most common fatty acid in Kosteletzkya seed oils. As mentioned above, K. pentacarpos belongs to the Malvaceae family for which the existence of fatty acids with cyclic moieties in the seed oils has been well-documented [37,[40][41][42]. This would indicate the presence of fatty acids with cyclic moieties in the seed oil of seashore mallow.…”

Fatty Acid Profile of Kenaf Seed Oil

“…Regarding the fatty acid profiles of other hibiscus species or, more generally, Malvaceae species, apparently the first report of an oxygenated fatty acid, 12,13-epoxy-9(Z)octadecenoic acid, namely okra (Hibiscus esculentus) apparently dates from 1957 [20]. Other authors studying Hibiscus syriacus and other malvaceous species noted that malvaceous seed oils often exhibit the ''biogenetic oddity'' of containing both cyclopropene and epoxy fatty acids [21], a feature not noted, however, in the above cited literature on the fatty acid profile of kenaf seed oil. In this connection, however, some reports on the fatty acid profiles of other hibiscus species should be briefly discussed.…”