Serum lipoamide dehydrogenase activity and kinetics were studied in nine patients with Friedreich's ataxia before and three months after therapy with oral lecithin. Results disclosed a significant reduction in LAD inhibition by NADH in all patients after therapy. Three patients normalized their increased Km for lipoamide and one patient showed the opposite results after therapy. Two patients ce...

Lipid-containing artificial tears are a type of artificial tears that use lipid components in order to restore the lipid layer of the tear film. One of these components is lecithin which can be applied in spray solutions containing lecithin liposomes. In this work the behavior of three of these commercial tears based on lecithin, Innoxa, Opticalm and Optrex, are studied using the Langmuir techn...

Phospholipids in the brain cell membranes contain different polyunsaturated fatty acids (PUFAs), which are critical to nervous system function and structure. In particular, brain function critically depends on the uptake of the so-called "essential" fatty acids such as omega-3 (n-3) and omega-6 (n-6) PUFAs that cannot be readily synthesized by the human body. We extracted natural lecithin rich ...

Deficiency of surfactant in alveoli leads to increased resistance to breathing. Histamine is a mediator in allergic respiratory diseases. Though the bronchoconstrictor effect of histamine is well recognised, histamine may have additional actions that contribute to pathogenesis in these diseases. The present study aimed to observe the effect of histamine on lecithin, a major component of alveola...

The proton magnetic resonance spectrum of DL-a!-lecithin at 100 MHz in CHCJ solvent is reported. An analysis of the spectrum is made. The chemical shifts of the N-(CH& protons and the resonance peak associated with the condensed water molecule showed concentration dependence with the latter showing the more pronounced response. These chemical shift changes are interpreted in terms of micelle fo...

Hydroxyapatite Ca10(PO4)6(OH)2 nanoparticles have been successfully synthesized by the wet chemical precipitation method at 60 °C in the presence of biocompatible natural surfactant-lecithin. The composition and morphology of nanoparticles of hydroxyapatite synthesized with lecithin (nHAp-PC) was studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning el...

Abstract Extra virgin olive oil-in-water nanoemulsions stabilised with synthetic or clean label surfactants (Tween 20 soy lecithin) was prepared using high-pressure homogenisation (HPH). The effect of HPH pressure and the number cycles were assessed through response surface methodology to optimise processing parameter. Mean droplet diameter (MDD), polydispersity index (PDI), thermal stability o...

This paper describes a procedure for the separation of lecithins according to the number of ethylenic bonds in their fatty acid residues. The procedure uses a column of alkylated dextran (Sephadex LH-20) eluted with an organic solvent system, the unsaturated lipids being separated as their mercuric acetate addition compounds. The system is capable of resolving at least four species of lecithin,...

Metformin hydrochloride, a drug group of biguanides, with significant efficacy in the treatment of diabetes type II, is decomposed before reaching to the stomach and is wasted in great losses. In this study, the nanoliposomes of metformin hydrochloride were prepared with Bingham method. At first, the single factor test is done. Design variables are: lecithin to cholesterol ratio, organic solven...

Metformin hydrochloride, a drug group of biguanides, with significant efficacy in the treatment of diabetes type II, is decomposed before reaching to the stomach and is wasted in great losses. In this study, the nanoliposomes of metformin hydrochloride were prepared with Bingham method. At first, the single factor test is done. Design variables are: lecithin to cholesterol ratio, organic solven...