Methyl palmitate - a fatty acid preferred for use in biodiesel engines, and methyl linolenate
were the major components in the extracted lipid, with no significant difference in methyl palmitate concentration of electrolyzed and untreated samples.
The presence of C18 fatty acids (oleic, linoleic and linolenic) in oil and in their esters was confirmed by the signals at 2.77 ppm, which are a combine measure of triene (linolenate
) and diene (linoleate), and those at 2.05 ppm that relate to all these esters.
Chromatogram obtained after the injection of 1.0 [micro]L of standard stock solution containing the palmitate esters of methyl (1), methyl stearate (2), methyl oleate (3), methyl linoleate (4) and methyl linolenate
Hydroperoxy-cyclic peroxides and other secondary products from methyl linolenate
Lipids, 1981, June, Volume 16, Issue 6, pp 439-448.
However, most plant oils used as biodiesel feedstock have a high level of polyunsaturated fatty acids (linoleate and linolenate
acids) which impacts the biodiesel with poor cold-temperature performance and low oxidative stability.
My intention in this article is to study the cis-trans isomerization and isomers formed during the thermal induction of methyl linolenate
Fatty acid composition of crude, degummed, neutralised and bleached oils obtained from fluted pumpkin seeds Fatty acid Fatty acids Carbon Crude methylester number oil (%) Myristate Myristic 14:0 0.12 Palmitate Palmitic 16:0 10.80 Stearate Stearic 18:0 0.24 Arachidate Arachidic 20:0 1.17 Behenoate Behenic 22.0 0.42 Palmitoleate Palmitoleic 16:1 N.D Oleate Oleic 18:1 47.40 Linoleate Linoleic 18:2 26.36 Linolenate
Linolenic 18:3 0.01 Fatty acid Degummed Neutralised Bleached methylester oil (%) oil (%) oil (%) Myristate 0.30 0.45 0.63 Palmitate 12.40 13.00 13.57 Stearate 1.65 1.80 2.33 Arachidate 1.70 1.83 2.00 Behenoate 0.46 0.51 0.62 Palmitoleate 0.17 0.25 0.30 Oleate 47.86 47.90 49.02 Linoleate 27.36 28.20 30.44 Linolenate
0.01 0.01 0.05 ND = not detected.
Whereas, gamma linolenate
(C18:3n6, p<0.05) and arachidonic acid (C20:4n6, p = 0.07) were higher in the 4CM group than the NCM group.
Some individuals recommend summing 7 meconium FAEE (ethyl linolenate
, palmitoleate, arachidonate, linoleate, palmitate, oleate, and stearate) and using a [greater than or equal to]2-nmol/g cutoff for heavy PAE (9, 10), whereas others sum fewer FAEE (11, 21).
Chromatographic analysis (Figure 3) showed that biodiesel obtained under optimal conditions indicated in Figure 4 consisted mainly of palmitic acid methyl esters, methyl oleate, methyl linoleate, methyl linolenate
and other methyl esters whose composition range between C16:0 and C22:0.
Another class of aroma compounds, the aliphatic acid methyl, esters, including hexadecanoic acid, methyl, ester, and methyl linolenate
, was abundant in algae from Shizuoka prefecture.