Discrimination of n-3 Rich Oils by Gas Chromatography

Exploring the capabilities of instrumental techniques for discriminating n-3 rich oils derived from animals is a very important though much neglected area that was emphasized more than 100 years ago. In this study the potential of gas chromatography (GC) for discriminating full fatty acid methyl ester (FAME) profiles from fish (cod liver and salmon) and marine mammal (seal and whale) oils is evaluated by means of principal component analysis (PCA). The FAME profiles from plant oils such as rapeseed, linseed and soy oils and seven different brands of n-3 supplements are also used in the discrimination process. The results from the PCA plots can reliably distinguish between plant, n-3 supplements, fish and marine mammal oils. By removing the contribution of the n-3 supplements and plant oils it is possible to discriminate between types of fish and marine animal oils. GC offers a rapid, simple and convenient means of discriminating oils from different species, brands and grades

Synthesis, characterization and free radical scavenging properties of rosmarinic acid fatty esters

Contacts: [email protected], [email protected] audienceThe hydrophobation of rosmarinic acid with saturated aliphatic primary alcohols of various chain lengths (methanol to eicosanol) was achieved via an acid-catalyzed esterification in the presence of a highly acidic sulfonic resin. The resulting alkyl rosmarinates were isolated, characterized and their global free radical scavenging activity was determined by the 2,2-diphenyl-1-picrylhydrazyl method in the stationary state. Only the dodecyl ester showed a stronger activity than rosmarinic aci

Complexes of nitric oxide with water and imidazole

R.C-O and R.S acknowledge a research fellowship from Universidad Autónoma de Madrid. E.S-G and K.B-R acknowledge Liebig and doctoral stipends, respectively, from the Fonds der Chemischen Industrie, Germany. E.S-G acknowledges the support of the Cluster of Excellence RESOLV (EXC 1069) and the Collaborative Research Center SFB 1093, both funded by the Deutsche Forschungsgemeinschaft. J.M.GV thanks MICINN (Project No. CTQ2010-12932) and AECID (Project No. A1/035856/11)