Mit Konjuenölen modifizierte Alkydharze

Kaufmann, H. P.; Sud, R. K.

doi:10.1002/lipi.19600620422

Cited by 2 publications

(1 citation statement)

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“…The UV data of the oil indicate a content of 27.56% conjugated fatty acids 1% (using E ---1710 at 270 nm for calculation) 1 cm with cis, trans, trans configuration (18). This was supported by the IR spectra, which are very similar to the IR spectra of oiticica oil (Licania rigida), known to contain a-eloestearic acid and a-licanic acid (19). Particularly significant are the keto absorption at 1720 cm -1 and the two bands at 962 cm -1 (w) and 990 cm -1 (s), typical for two trans and one cis double bond in conjugation (20).…”

Section: Resultsmentioning

confidence: 60%

Identification of conjugated fatty acids in the seed oil of Acioa edulis (Prance) syn. Couepia edulis (Chrysobalanaceae)

Spitzer

Marx

Maia

et al. 1991

J Americ Oil Chem Soc

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The oil ofAcioa edulis has the fatty acid composition: palmitic acid 28.3%, palmitoleic acid 1.3%, stearic acid 6.8%, oleic acid 26.5%, vaccenic acid 1.3%, linoleic acid 8.8%, arachidic acid 0.7%, a-eleostearic acid 7.3% and a-licanic acid 19%. The oil was analyzed and components were identified by ultraviolet (UV), infrared (IR), nuclear magnetic resonance (IH-NMR, 13C-NMR), gas chromatography/mass spectrometry (GC/ MS) and chemical methods. For transesterification the tetramethylguanidine reagent was used and it was shown that the method is very suitable for co~ugated fatty acids. The equivalent chain lengths of aeleostearic acid and ~-licanic acid and their all-trans isomers were determined on DB 23 and OV-1. The electron impact (EI) and chemical ionization (CI) (with isobutane) mass spectra of Hcanic acid, eleostearic acid and the EI mass spectrum of 4-oxo-azelalc acid are presented and discussed. Furthermore, a comparison of literature data of seeds with the same common name is presented. KEY WORDS: Acioa edulis, Chrysobalanaceae, conjugated fatty acids, eleostearic acid, gas chromatography/mass spectrometry (GC/MS), licanic acid, 4-oxo-azelaic acid.Acioa edulis syn. Couepia edulis is a member of the family Chrysobalanaceae found in the basin of the Rio Purus and the central Solimoes of Amazonia, Brazil. The tree is 25 m tall and its stone-fruits are 8-9 cm long and 4.5-cm broad. The kernel is eaten raw by the habitants of the described region or is crushed and added to tapioca cakes. The oil of the seeds is used for cooking and soapmaking (1).The common name "Cotia Chestnut (Castanha de Cotia)" obviously is not unique for this fruit. This curious designation is derived from the name of a tailless animal called "Cotia, "which feeds on these kernels (2). There obtained by argentation thin-layer chromatography was converted to the bis-(methylthio) derivates as described previously (10).

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Section: Resultsmentioning

confidence: 60%