nshirt H (1969) Synthetic pharmaceutical products. In: Stahl E (ed.) Thin-layer Chromatography, p. 541. London: G. Allen and Unwin. Guinchard C, Truong TT, Masson JD and Panouse JD (1976) Migration d’acides aromatiques en chromatographie sur couche mince de gel de silice en fonction de la teneur en eau ou en acide formique de solutions creH ant l’atmosphere de la cuve à chromatographie. Chromat...

The article is devoted to the results of studies on development thin–layer chromatography (TLC) and UV–spectrophotometry analysis methods introduction ketamine determination substance extracted from composition biological fluids. developed during research were applied fluids positive obtained.

Endotoxin extracted from the heptose-less mutant of Salmonella typhimurium was hydrolyzed in 0.1 N HCl in methanol/water (1:1, v/v) at 100 degrees C to yield lipid A, which was then fractionated on a Sephadex LH-20 column to yield a major monophosphoryl lipid A fraction. The monophosphoryl lipid A was further fractionated by preparative thin layer chromatography. This process yielded three majo...

A new method for on-spot detection and characterization of organic compounds resolved on thin layer chromatography (TLC) plates has been proposed. This method combines TLC with dielectric barrier discharge ionization (DBDI), which produces stable low-temperature plasma. At first, the compounds were separated on TLC plates and then their mass spectra were directly obtained with no additional sam...

Antibacterial activity of the aerial extracts from Xanthium brasilicum prepared in methanol, diethyl ether, petroleum benzene and an equal mixture of the three solvents were studied against bacterial laboratory standards and clinical isolates using the disk diffusion method. The best antibacterial results were obtained when methanol or the solvent mixture was used. The crude extract with the hi...

INTRODUCTION Ionophore antibiotics are widely used in veterinary medicine as anticoccidial drugs for poultry and as growth promoters for farm animals. The ionophores, despite their utility, possess a narrow range of safety; several species (horses in particular) appear highly susceptible to the toxic effects of these compounds, compared to other animal species. Thin layer chromatography method ...

Thin-layer chromatography (TLC) has been a useful tool in the analysis of numerous urinary constituents; as in most applications of adsorption TLC, it is best used in conjunction with other chromatographic processes. The application of TLC to the resolution of polar urinary products derived from lipids is shown for the metabolism of a 14C-labeled fatty acid and a 14C-labeled glyceryl thioether....

The present method describes the estimation of gamma-aminobutyric acid (GABA) from adult rat brain by thin layer chromatography (TLC). The major advantage of this TLC method is the sensitivity and repidity of estimation. About 93 to 98 percent recovery is possible by this procedure and this shows linearity up to 9 micrograms. Replicate analysis of GABA by this method shows a co-efficient variat...

The interaction between non-ionic surfactants and cholesterol has been studied by reversed-phase thin-layer chromatography (RP-TLC) using cholesterol impregnated TLC plates and methanol–water mixtures as mobile phases. The RM values obtained were in linear correlation with the methanol concentration of the mobile phase. The intercept obtained from linear regression analysis (RM0), being charact...

in the present study, an oxidative conversion of non-fluorescent dichlorofluoroscein (ldcf) to fluorescent dichlorofluoroscein (dcf) was used for detection of antioxidant properties of plant extracts. the rate of the reaction was followed by monitoring the formation of dcf as a function of time. the antioxidant assay was carried out for different concentrations of gallic acid, salvia mirzayanii...