Eicosanic acid

In another example a new acid from Sesquerella seed oil eventually found to be (-(-)-14-hydroxy-cis-A -eicosenoic acid (3) was converted by hydrogenation and then reduction to a product identified as eicosanic acid (5). 

Substantial changes occurred also in the relative content of fatty acids with 20 carbon atoms. The pool of 20 2co6 reduced by 2.7 times, 20 1(0-91.3 times. At the same time, the content of eicosanoic acid (20 0) increased more than 2-fold. As a resnlt, the ratio of pool unsaturated fatty acids containing 20 caibon atoms (20 l(o7 + 20 l(o 9) + (20 2co6) x 2 to eicosanic acid in mitochondrial membrane lipids decreased from 3.65 0.03 to 1.20 0.16. 

Cosanic acids n. A series of fatty acids beginning with eicosanic acid (C20H40O2) and ending with nanacosanic acid (C29H58O2), each acid differing from its predecessor by one CH2 group. 

Eicosanic Acid See Cosanic Acids. lUPAC Name nonadecanoic acid. 

CAS 506-30-9 EINECS/ELiNCS 208-031-3 Synonyms Arachic acid Eicosanic acid Eicosanoic acid Ciassification Fatty acid Empiricai C2(,H4(,02 Formuia CH3(CH2)isCOOH... 

Cold-water frsh like salmon are rich in omega-3 fatty acids, which have a double bond three carbons in from the noncarboxyl end of the chain and have been shown to lower blood cholesterol levels. Draw the structure of 5,8,11,14,17-eicosapentaenoic acid, a common example. (Eicosane = C20H42)... 

Gas Chromatography Analysis of Water for Pesticides. All analyses for pesticides in water were done by gas chromatography. Solvents used for extraction were checked by gas chromatography for purity and interferences and all glassware used in the extraction was cleaned in a chromic acid/sulfuric acid mixture. Standards consisted of mixtures of various pesticides (actual commercial formulations) suspended or dissolved in water. These aqueous standards were extracted in the same manner as unknown solutions. The standard concentrations encompassed the concentration of unknowns to be determined. A standard curve normally consisted of a set of four pesticide concentrations. Blanks were run and an internal standard (eicosane) was used. The internal standard concentration was kept constant for all analyses. The conditions for GC analysis were guided by the pesticides expected in the water. For the more complex mixtures, such as those employed in the synthetic waste and those encountered in the field, a 6 ft., 3 percent SE-30 on GAS CHROM Q column sufficed. A typical chromatogram of a complex pesticide mixture is shown in Figure 2. ( )... 

ALKANES Methane Decane Undecane Hexadecane Heptadecane Octadecane Nonadecane Eicosane Heneicosane Docosane Tricosane Pentacosane Hexacosane Octacosane Triacontane Dotriacontane Trimethyl cyclohexane Dimethyl cyclohexane ACIDS... 

Free fatty acids, whose levels are generally raised by insulin or alcohol, influence the rate of VLDL synthesis and hence the concentration of triglycerides. About 16 g glycerol, which are mainly utilized in the liver, are released daily by lipolysis, and about 120 g free fatty acids are made available for generating energy in the heart and skeletal musculature (75%) as well as in the liver itself (25%o). These free fatty acids are bound in the plasma to albumin (50%) and lipoproteins (50%). Their extremely short plasma half-life of approx. 2 minutes emphasizes their high metabolic activity. Fatty acids are present in the plasma in saturated (no double bond) and unsaturated (various numbers of double bonds) forms. Essential fatty acids cannot be synthesized by the body, which means they must be obtained from food intake. The most important ones are multiple unsaturated fatty acids such as linolic acid (Cis-fatty acid, 2 double bonds), linolenic acid (Ci8-fatty acid, 3 double bonds), and arachidonic acid (C2o-fatty acid, 4 double bonds). Their prime function is to act as precursors for the synthesis of eicosan-oids. (s. fig. 3.10)... 

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