Distribution of fatty acids in internal and external positions of triacylglycerols in 2 cyclopropanoid oils : litchi and longan.
| dc.creator | Grondin, I., | |
| dc.creator | Farines, M. | |
| dc.creator | Smadja, J. | |
| dc.creator | Soulier, J. | |
| dc.description | Triacylglycerols in Litchi sinensis [L. chinensis] and longan (Euphoria longana [Dimocarpus longan]) seed oils are characterized by cyclopropanoic fatty acids: cis-9,10-methyleneoctadecanoic acid or dihydrosterculic acid constitutes 38.0% of total fatty acids in litchi and 17.4% in longan, whereas cis-7,8-methylenehexadecanoic acid only constitutes 5.5% and 1.0%, respectively. Triacylglycerols of these 2 oils underwent enzymatic hydrolysis with porcine pancreatic lipase or chemical degradation withethyl magnesium bromide, a reagent without chain specificity or regioselectivity. An unequal distribution of cis-7,8-methylenehexadecanoic and cis-9,10-methyleneoctadecanoic acids was found. The former was found in the sn-2 position at 84% in litchi triacylglycerols and at 100% in longan triacylglycerols, while the latter was located in external positions at 88% and 92%, respectively. Comparison of results from the 2 methods confirmed the impossibility of using the results obtained from enzymatic hydrolysis to determine the internal and external distribution of fatty acids in triacylglycerols containing cyclopropanoic fatty acids. | |
| dc.description | Triacylglycerols in Litchi sinensis [L. chinensis] and longan (Euphoria longana [Dimocarpus longan]) seed oils are characterized by cyclopropanoic fatty acids: cis-9,10-methyleneoctadecanoic acid or dihydrosterculic acid constitutes 38.0% of total fatty acids in litchi and 17.4% in longan, whereas cis-7,8-methylenehexadecanoic acid only constitutes 5.5% and 1.0%, respectively. Triacylglycerols of these 2 oils underwent enzymatic hydrolysis with porcine pancreatic lipase or chemical degradation withethyl magnesium bromide, a reagent without chain specificity or regioselectivity. An unequal distribution of cis-7,8-methylenehexadecanoic and cis-9,10-methyleneoctadecanoic acids was found. The former was found in the sn-2 position at 84% in litchi triacylglycerols and at 100% in longan triacylglycerols, while the latter was located in external positions at 88% and 92%, respectively. Comparison of results from the 2 methods confirmed the impossibility of using the results obtained from enzymatic hydrolysis to determine the internal and external distribution of fatty acids in triacylglycerols containing cyclopropanoic fatty acids. | |
| dc.identifier.url | https://catalogo.fedepalma.org/cgi-bin/koha/opac-detail.pl?biblionumber=23342 | |
| dc.language | d | |
| dc.relation | ||
| dc.subject | enzymes | |
| dc.subject | fatty acids | |
| dc.subject | fatty oils | |
| dc.subject | fruit crops | |
| dc.subject | hydrolysis | |
| dc.subject | longans | |
| dc.subject | methodology | |
| dc.subject | position | |
| dc.subject | seed oils | |
| dc.subject | seeds | |
| dc.subject | subtropical fruits | |
| dc.subject | triacylglycerols | |
| dc.subject | Enzymes | |
| dc.subject | Enzymes | |
| dc.subject | Fatty acids | |
| dc.subject | Hydrolysis | |
| dc.subject | Methodology | |
| dc.subject | Methodology | |
| dc.subject | Seeds | |
| dc.subject | Seeds | |
| dc.subject | Tropical fruit | |
| dc.title | Distribution of fatty acids in internal and external positions of triacylglycerols in 2 cyclopropanoid oils : litchi and longan. | |
| dc.type | text |