The analysis and characterization of lipids andwaxes is of great importance in the food industry, pharmaceutical and cosmetic industry, in surfactant and detergent technology and in natural product research. Lipid analysts have always been on the forefront of developments in separation sciences and new techniques in chromatography have often been developed for the separation of lipids. The Rrst...

A cloud point extraction coupled with high performance liquid chromatography (HPLC/UV) method was developed for the determination of Δ(9)-tetrahydrocannabinol (THC) in micellar phase. The nonionic surfactant "Dowfax 20B102" was used to extract and pre-concentrate THC from cannabis resin, prior to its determination with a HPLC-UV system (diode array detector) with isocratic elution. The paramete...

This article refers to:Formation of Lyotropic Micellar Nematic Phase in Binary Mixture Liquid Crystals

The absorption of endogenous cholesterol, labeled with tracer doses of cholesterol (14)C or cholesterol-(3)H and of near physiological doses of vitamin D(3)-(3)H was studied in rats with cannulated intestinal lymphatics. The effects of administering mixed micellar solutions of fatty acid, monoglyceride, and bile salt on the absorption of these labeled sterols was determined. It was observed tha...

The focus of this work is the dosimetric impact of multileaf collimator (MLC) leaf width on the treatment of prostate cancer with intensity-modulated radiation therapy (IMRT). Ten patients with prostate cancer were planned for IMRT delivery using two different MLC leaf widths--4mm and 10mm--representing the Radionics micro-multileaf collimator (mMLC) and Siemens MLC, respectively. Treatment pla...

Two methods, high-performance liquid chromatography (HPLC) and micellar electrokinetic chromatography (MEKC), for analysis of multicomponent lipopeptide antibiotic iturin A are described. After conducting a series of optimizations, the HPLC separation of iturin A2, A3, A4, A5, A6, A7, and A8 isomers were achieved by a NPS RP-C18 column with an isocratic elution of acetonitrile/10 mM ammonium ac...

A microwave-assisted fluorescence labeling method for use in CE-LIF (capillary electrophoresis-laser induced fluorescence) is described. Six amphetamine-like designer drugs, namely, o-, m-, p-chloro- and o-, m-, p-fluoro-amphetamine derivatives, were synthesized and used as model compounds. FITC (fluorescein isothiocyanate isomer I) and a blue-laser were used as the fluorescent labeling reagent...

The separation and on-line concentrations of lysergic acid diethylamide (LSD), iso-lysergic acid diethylamide (iso-LSD) and lysergic acid N,N-methylpropylamide (LAMPA) in human urine were investigated by capillary electrophoresis-fluorescence spectroscopy using sodium dodecyl sulfate (SDS) as an anionic surfactant. A number of parameters such as buffer pH, SDS concentration, Brij-30 concentrati...

short timeframe, and rapid approaches are needed to assess log Pow values of these compounds (2,4,7). Several separation-based approaches for indirectly determining log Pow values in a rapid fashion have been reported, including reversed-phase high performance liquid chromatography (HPLC) (2,3,8–11), thin-layer chromatography (12,13), micellar electrokinetic chromatography (MEKC) (7,14–16), and...