Food Science and Biotechnology

Korean Society of Food Science and Technology (한국식품과학회)
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Occurrence of cis-4-Tetradecenoic Acid in the Oils of Kernels of Lindera erythrocarpa Seeds, as a Major Component

  • Kim, Seong-Jin (Department of Food Science & Nutrition, Dong-A University) ;
  • Joh, Yong-Goe (Department of Food Science & Nutrition, Dong-A University)
  • Published : 2006.02.28
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Abstract

Kernel oils of Lindera erythrocarpa seeds had high level of unusual fatty acid. Picolinyl ester of this unknown fatty acid showed molecular ion at m/z = 317 with other diagnostic ions such as m/z = 151, 191 (40 amu between two peaks), 204, and 218 on GC-MS. Characteristic peak at $720\;cm^{-1}$ appeared in IR spectrum. In $^1H-NMR$ spectrum both methylene protons at C-3 and C-6 resonated at ${\delta}2.309$ and ${\delta}2.012$, and methine protons of double bond resonated in lower magnetic field centered at ${\delta}5.296$ (C-4) and ${\delta}5.387$ (C-5) as multiplet (J = 9.7Hz). In $^{13}C-NMR$, signals at ${\delta}22.669$ and ${\delta}27.048$ were due to C-3 and C-6 of ${\delta}^4$-monoenoic acid. Results obtained from spectroscopic measurements confirmed unknown fatty acid as cis-4-tetradecenoic acid (cis-4-$C_{14:1}$). Main fatty acid components of oils were cis-4-$C_{14:1}$ (44.5-45.1%), oleic acid ($C_{18:1}$), 20.4-21.3%), and lauric acid ($C_{12:0}$, 11.6-12.4%), along with trace amounts of cis-4-$C_{12:1}$ and cis-4-$C_{16:1}$.

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References

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