Search results for "Lipid fraction"

Coffee components and cardiovascular risk: beneficial and detrimental effects

2014

Coffee consists of several biological active compounds, such as caffeine, diterpenes, chlorogenic acids, and melanoidins, which may affect human health. The intake of each compound depends on the variety of coffee species, roasting degree, type of brewing method and serving size. The bioavailability and the distribution of each compound and its metabolites also contribute to coffee mechanisms of action. The health benefits of coffee consumption regarding cardiovascular system and metabolism mostly depend on its antioxidant compounds. In contrast, diterpenes and caffeine may produce harmful effects by raising lipid fraction and affecting endothelial function, respectively. Studying the mecha…

Effect of lactoferrin addition on the dialysability of iron from infant formulas

2003

A possible enhancing effect of lactoferrin (Lf) on iron absorption by breast-fed infants has been suggested, however the available results failed to confirm this hypothesis. Nevertheless, Lf could be useful in protecting the lipid fraction of infant formulas against oxidation. Concerning the possibility of adding Lf to infant formulas with this aim, we considered it necessary to evaluate the effect of this addition on iron dialysability, which was used as a parameter indicator of bioavailability. An in vitro dialysability method was applied to three types of infant formulas, with and without Lf added, respectively. In none of the analysed formulas did the added Lf have a negative effect on …

1984

Different polymeric transport systems for biologically active substances are presented. In the past, most of the reviews on polymeric drugs dealt with pharmaca, fixed to conventional water-soluble polymers. Naturally occuring transport proteins with their complex features have recently been imitated by micellar solubilized polymers. Polymerized liposomes from polymerizable lipids can be regarded as vesicular solubilized polymers and are discussed as stable models for biomembranes. By insertion of glycolipids, these liposomes are rendered susceptible to specific recognition by proteins. When natural or cleavable synthetic lipids are incorporated into polymerizable membranes, phase-separation…

Organic solvent-soluble contents of nickel and cobalt in some algae

1990

In pursuit of our work on metal contents of lipid fractions isolated from plant material, we now show by means of highly sensitive analytical methods that nickel and cobalt are also present in organic extracts of algae in detectable amounts