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Lipid class composition of the microalga Pavlova lutheri: Eicosapentaenoic and docosahexaenoic acids

Title
Lipid class composition of the microalga Pavlova lutheri: Eicosapentaenoic and docosahexaenoic acids
Type
Article in International Scientific Journal
Year
2003
Authors
Meireles, LA
(Author)
Other
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Catarina Guedes, AC
(Author)
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F. Xavier Malcata
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Journal
Vol. 51
Pages: 2237-2241
ISSN: 0021-8561
Other information
Authenticus ID: P-000-H2X
Abstract (EN): The lipid classes of Pavlova lutheri, cultivated in semicontinuous mode, were studied by thin-layer chromatography and gas chromatography in attempts to describe the distribution of fatty acid residues within its lipid pool, with special emphasis on eicosapentaenoic (C20:5n-3, EPA) and docosahexaenoic (C22:6n-3, DHA) acids. Neutral lipids and glycolipids were the major constituents and accounted for similar to57 and 24% of the total fatty acid residues (TFA), respectively. Phospholipids accounted for similar to10% of TFA. Two lipid classes, acylated steryl glycosides (SG) and diphosphatidylglycerols (DPG), were eventually identified in P. lutheri for the first time. The nonpolar fraction was mainly composed of triacylglycerol (TAG), whereas the polar fraction was mainly composed of monogalactosylacylglycerols (MGDG). The distribution of total EPA and DHA within the lipid pool was calculated in attempts to ascertain the quality of said microalgae as a feed source, as well as the possibility of enhancement of individual fatty acid production and extraction thereafter. EPA was especially concentrated in MGDG (similar to45%) and TAG (similar to33%); conversely, DHA was dispersed through various classes, especially within TAG (similar to27%), DPG (similar to22%), and betaine lipids (21%).
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 5
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