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Neutral lipid characterization of non-water-soluble fractions of Carica Papaya latex

Barouh N., Abdelkafi S., Fouquet B., Pina M., Scheirlinckx F., Carrière F., Villeneuve P.. 2010. Journal of the American Oil Chemists' Society, 87 (9) : p. 987-995.

DOI: 10.1007/s11746-010-1582-1

The non-water-soluble fraction of Carica papaya latex (CPL) constitutes a waste material from papain production; very little information exists regarding its chemical composition. The non-water-soluble fraction of CPL was fractionated by liquid chromatography into neutral lipids, glycolipids and phospholipids. The most abundant compounds were found to be the polar lipids, accounting for 79.2% (w/w) of the total extractible matter, while the total amount of neutral lipids was only around 20%. It was composed of free fatty acids, sterols and triterpenic alcohols, but no glycerides were detected. A high content of saturated fatty acids was measured; these saturated fatty acids were represented by very long chains with C24:0, C26:0 and C28:0 accounting for 6.3, 11.0 and 6.3%, respectively, in the total extractible matter and 7.3, 9.0 and 3.9% in the FFA fraction. The monounsaturated fatty acids were about 23-25% in both samples, with oleic acid (C18:1) being the most abundant. The polyunsaturated fatty acids that were 25.1% in the total matter and 21.6% in the FFA fraction were mainly represented by linoleic acid (C18:2n-6). Finally, a very interesting characteristic of the FA composition of this latex concerns the presence of odd-numbered fatty acids in significant amounts (around 22% in the total extract and 24.3% in the FFA fraction).

Mots-clés : carica papaya; latex; eau; déchet industriel; composition chimique; triterpénoïde; stérol; lipide; alcool gras; teneur en lipides; utilisation; hevea brasiliensis; congo; thaïlande; france

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