Developments in nanotechnology and in the formulation of liposomal systems provide the opportunity for cosmetic dermatology to design novel delivery systems. Determination of their physico-chemical parameters has importance when developing a nano-delivery system. The present study highlights some technological aspects/characteristics of liposomes formulated from egg or soy lecithins for topical...

About the year 1846 Gobley succeeded in obtaining from egg yolk and other organs a substance of a fat-like nature containing nitrogen and phosphorus which he called lecithin [1846]. This substance was soluble in alcohol and in ether, formed an emulsion when rubbed up with water and yielded fatty acids and glycerophosphoric acid on hydrolysis. These observations of Gobley furnished a basis for t...

In the preceding paper it was shown that a phospholipase prepared,from Penicllium notatum will hydrolyse lecithin only after the, addition,, of a minimum proportion of anionic amphipathic molecules1 e.g. dicetylphosphoric acid, cardiolipin, sodium dodecyl sulphate (Bangham & Dawson, 1959), The onset of hydrolysis occurred, only when the emulsion particles carried a minimum net negative charge, ...

Chemiluminescence (CL) that appears during oxidation of lecithin and ascorbate has been studied. A simple system consisting only of purified lecithin, which has one double bond, and ascorbate as a physiological reductant with a low redox potential, was used. The CL spectrum of lecithin contain a strong band lying in the near infrared, and three bands at 20 900 cm-1, 17 700 cm-1 and 15 800 cm-1,...

A procedure for the enzymatic determination of lecithin and sphingomyelin in aqueous solution is described. The phospholipids are first dissolved in chloroform:methanol (2:1 by vol), the solvent is evaporated, and the residue is redissolved in an aqueous zwitterionic detergent solution. The enzymatic reaction sequences of both assays involve hydrolysis of the phospholipids to produce choline, w...

This paper focuses on alternative options regarding the often highly time-consuming treatments to overpaint removal from wooden polychrome objects used in Lithuanian conservation practice. It aims highlight variety of approaches throughout European region. Based case study analysis, four types that have been identified region are mechanical, solvent, biological, and physical. The methods found ...

Organogel as a system was to estimate its capacity delay and slow the drug release in duodenum. The gelators, 12HSA (12-hydroxystearic acid), span 60. 40 were used; castor oil (CO) anise (AO) also represented liquid phase. To achieve goal of this work by using diclofenac sodium (DS). Organogels specifications estimating thermal attitude tabletop rheology differential scanning calorimetry (DSC)....

Lecithin and lecithin/cholesterol dispersions as well as lysolecithin micelles were used to provide basic information on the mechanism of the interaction of zwitterionic phospholipids with dextran sulfate. The addition of dextran sulfate to lecithin dispersions or lysolecithin micelles in the presence of Ca2+ produced insoluble complexes. At each Ca2+ concentration, the amount of insoluble comp...

In a 42-d experiment, 576 one-day-old Vencobb 308 broiler chicks were used to investigate the effects of lecithin extract (0.5 g/kg), choline chloride 60% (1 g/kg) and Bio choline (1 g/kg) in diets of moderate and high energy in a 4 × 2 factorial arrangement on performance and certain physiological traits in broiler chickens. The inclusion of Bio choline and lecithin extract in the diet signifi...