The oxidation of organic films on cloud condensation nuclei has the potential to affect climate and precipitation events. In this work we present a study of the oxidation of a monolayer of deuterated oleic acid (cis-9-octadecenoic acid) at the air-water interface by ozone to determine if oxidation removes the organic film or replaces it with a product film. A range of different aqueous sub-phas...

Plasma levels of aldosterone are not always predictable from the activity of renin and the concentration of potassium. Among the unexplained are elevated levels of aldosterone in some obese humans. Obesity is characterized by increased plasma fatty acids and oxidative stress. We postulated that oxidized fatty acids stimulate aldosteronogenesis. The most readily oxidized fatty acids are the poly...

Article history: Received on: 18/08/2014 Revised on: 03/10/2014 Accepted on: 27/12/2014 Available online: 28/03/2015 Classical method of sample preparation for fatty acid analysis is a complicated, rigorous, multiple-step process that is often time-consuming. However, innovation has made it possible to obtain fatty acids esters in a single step without compromise of the quality and quantity of ...

The saturated fatty acid auxotroph of Saccharomyces cerevisiae, KD115, was used to determine the efficiency of various unsaturated fatty acids in supporting growth. The efficiency, as the number of cells produced per fmol of unsaturated fatty acid, ranged from zero for a number of acids to over 26 cells per fmol of eicosapentaenoic acid. Efficiencies tended to be higher for acids with fewer car...

Bitterness is a common aversive flavor attribute of foods associated with low consumer acceptance. Untargeted LC–MS flavoromic profiling was utilized to identify endogenous compounds that influence the generation bitter compound 9,12,13-trihydroxy-trans-10-octadecenoic acid (pinellic acid) during bread making. A diverse sample set wheat germplasm chemically profiled. The corresponding pinellic ...

The polymorphism of 25 glycerol trioctadecenoates with double bonds ranging from ~4-~ I 7 was investigated by differential scanning calorimetry. Triglycerides with cis bonds in odd positions ~7-~13 exhibited three intermediate melting (13'-) forms, but those with cis bonds in even positions, except cis ~4, lacked 13'-forms. Among the trans compounds, only ~ 11, 13, and 14 showed 13'-forms. The ...

A test system is described, which allows the search for compounds interfering with human sex hormone-binding globulin (SHBG) even in complex plant extracts. The method has been evaluated and applied to Urtica dioica root extracts. The lignan secoisolariciresinol (5) as well as a mixture of isomeric (11 E)-9,10,13-trihydroxy-11-octadecenoic and (10 E)-9,12,13-trihydroxy-10-octadecenoic acids (3 ...

The lipid metabolism of schistosomes is characterized by several intriguing adaptations to a parasitic way of living. The surface of the parasite consists of two closely apposed phospholipid bilayers, a structure unique to blood flukes. Schistosomes do not synthesize fatty acids de novo, but are able to modify fatty acids, which they obtain from the host, by chain elongation. Here we present ev...

The yew tree (Taxus baccata L.) is considered in folklore a symbol of immortality due to its qualities longevity and regeneration. Despite poisonous reputation, the has long history medicinal use, particularly form extracts from leaves bark. In work presented herein, gas chromatography–mass spectrometry (GC–MS) chemical profiling was applied aqueous ammonia/hydromethanolic several plant organs ...