Analysis of polyunsaturated fatty acid composition of Strongyloides ratti in relation to development

1990 ◽  
Vol 64 (4) ◽  
pp. 303-309 ◽  
Author(s):  
Takeya Minematsu ◽  
Seietsu Yamazaki ◽  
Yoshinori Uji ◽  
Hiroaki Okabe ◽  
Masataka Korenaga ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Linoleic Acid ◽  
Acid Composition ◽  
Polyunsaturated Fatty Acid ◽  
Fatty Acid Metabolism ◽  
Acid Metabolism ◽  
High Ratio ◽  
Free Living

ABSTRACTThe effect of linolenic acid (C18:3ω3) on the development of Strongyloides ratti first-stage larvae (L1) in culture was studied. The fatty acid composition of S. ratti free-living generations was analyzed by gas chromatography. L1 had abundant linoleic acid (C18:2ω6) but its proportion decreased with development. On the contrary, eicosapentaenoic acid (C20:5ω3) and C20:4ω3 were prominent in the filariform larva (L3). Because C20:5ω3 is generally synthesized from C18:3ω3 via C20:4ω3, the high ratio of C20:5ω3/C18:3ω3 of L3 in all the free-living generations suggested that polyunsaturated fatty acid metabolism, particularly the ω-3 series, and eicosanoids produced had important roles in the development of S. ratti L1.

Effect of fabA and desA Mediated Low Temperature Adaption on Shewanella putrefaciens via Regulation of Unsaturated Fatty Acid Metabolism

2019 ◽  
Vol 11 (10) ◽  
pp. 1430-1437
Author(s):  
Li Chen ◽  
Shengping Yang ◽  
Yunfang Qian ◽  
Jing Xie
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Low Temperature ◽  
Acid Composition ◽  
Fatty Acid Metabolism ◽  
Unsaturated Fatty Acid ◽  
Acid Metabolism ◽  
Shewanella Putrefaciens ◽  
Spoilage Bacteria ◽  
Temperature Environment

Shewanella putrefaciensis a kind of spoilage bacteria in low temperature chilled aquatic products, which seriously threats human health and aquaculture. The fatty acid composition of S. putrefaciens cell membranes has been shown to be involved in adaption of bacteria to various environments. However, the specific fatty acid metabolism of S. putrefaciens to the low temperature environment remains unknown. In this study, the growth of S. putrefaciens, the response of fatty acid composition to low temperature production, and the differential expression and synthesis of enzymes related to unsaturated fatty acid synthesis were investigated by lack of fabA and desA in S. putrefaciens. Results showed that loss of fabA and desA suppressed the growth of S. putrefaciens and reduced unsaturated fatty acid contents at low temperature. In addition, the upregulation of fabA, but not desA resulted in accumulation of unsaturated fatty acid. Up-regulations of fabA and desA both resulted in promotion of GPR41 and Retn gene and protein expressions. These results demonstrated that the deletions of fabA and desA resulted in reduction of unsaturated fatty acid and key downstream genes of fatty acid metabolism, which suggested that unsaturated fatty acid was involved in the adaptations of fabA and desA-mediated S. putrefaciens to the low temperature environment. These results provided a tentative mechanism of the synthesis of unsaturated fatty acids in S. putrefaciens under low temperature conditions.

FATTY ACID COMPOSITION OF SOME CUCURBITACEAE SEED OILS

1964 ◽  
Vol 42 (3) ◽  
pp. 560-564 ◽  
Author(s):  
Mary J. Chisholm ◽  
C. Y. Hopkins
Keyword(s):  
Gas Chromatography ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Linoleic Acid ◽  
Acid Composition ◽  
Eleostearic Acid ◽  
Seed Oils ◽  
Punicic Acid ◽  
Major Acid

Seed oils of nine species of Cucurbitaceae were analyzed by gas chromatography and other techniques. The oil of Ecballiumelaterium yielded 22% of punicic acid; Cucumisdipsaceus and Cucurbitaficifolia had the ordinary palmitic–oleic–linoleic composition; a variety of Momordicacharantia had 57% of α-eleostearic acid. Occurrence of punicic acid as the major acid of Trichosanthesanguina was confirmed. No evidence could be found for the existence of an isomer of linoleic acid in Telfairiapedata oil. The fatty acid composition was determined quantitatively for the above oils and for those of Cucumismelo, Lagenariasiceraria, and Luffacylindrica. The 4-bromophenacyl esters of α-eleostearic and punicic acids were prepared.

scholarly journals Substituting Fish Oil with Crude Palm Oil in the Diet of Atlantic Salmon (Salmo salar) Affects Muscle Fatty Acid Composition and Hepatic Fatty Acid Metabolism

2002 ◽  
Vol 132 (2) ◽  
pp. 222-230 ◽  
Author(s):  
J. Gordon Bell ◽  
R. James Henderson ◽  
Douglas R. Tocher ◽  
Fiona McGhee ◽  
James R. Dick ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Atlantic Salmon ◽  
Fish Oil ◽  
Acid Composition ◽  
Salmo Salar ◽  
Palm Oil ◽  
Fatty Acid Metabolism ◽  
Acid Metabolism ◽  
Crude Palm Oil
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