J. Chromatogr. Sci. 31, 220-224 (1993). TLC of various non-ionic tensides consisting of ethylene oxide oligomer mixtures on silica and alumina with 55 systems. Calculation of the solvent strength and selectivity for each chromatographic system and correlation of them with the physicochemical parameters of the solvent using stepwise regression analysis.

Effects of alumina on separations of esters of maleic and fumaric acids. J. Chromatogr. 670, 181-190 (1994). Study of the TLC separations of 20 diastereoisomeric 1,2-disubstituted ethenes. ROOCCH=CHCOOR on three different aluminas with 24 mobile phases having strength e in the range 0.210 - 0.250. Observation of a wide variety of solvent selectivity effects. Discussion of the influence of type of the alumina and the selectivity of the mobile phases and the effective values of the group R on the relative retention of the diastereoisomers. Comparison of the results from alumina with those from silica using a given mobile phase.

Chromatographia 40, 453-457 (1995). Reversed-phase ion-pair HPTLC on RP-18 silica with 70-90% methanol containing 0.01 M buffer solution of orthophosphoric acid (85% m/m) - water 1:160 (v/v), pH 7.5, and 0.01M TBA-Br. Quantification of the effect of the individual substituents on retention by DRM values. Investigation of the influence of the compounds differing in substituents on the retention of organic modifier and ion-pair reagent concentration.

J. Chromatogr. A 766, 165-170 (1997). Determination of the RM values of substituted piperazine derivatives on silanized silica with buffered aqueous acetone with or without n-octylamine. Comparison of the difference between the chromatographically determined lipophilicity of substances containing aromatic nuclei that are separated by a sufficiently flexible chain and that calculated on the basis of tabulated fragmental constants.

J. Planar Chromatogr. 11, 141-144 (1998). TLC of 26 compounds derived from 1,2-diphenylhydrazine (half of which were stable free radicals) on silica gel or alumina with toluene and on silica gel impregnated with paraffin oil with different mixtures of water, acetone, and 2-propanol. Detection by direct observation. Rf values, lipophilicities, and specific lipophilic surface areas were determined. Simple, inexpensive, quick, and sensitive TLC procedure.

J. Liq. Chrom. & Rel. Technol. 22, 51-75 (1999). Examination of the retention behavior of 13 phenols and 19 aromatic amines on modified TLC plates using normal-phase eluent systems (polar modifier (2-propanol, ethyl methyl ketone, dioxane, tetrahydrofuran, diisopropyl ether) in n-heptane) and comparison of the results with those obtained on bare silica gel. - Visualization under UV 254 nm.

J. Planar Chromatogr. 13, 384-387 (2000). TLC of enantiomers (1-acenaphthol, phenoxymethyl oxirane, 4-chlorophenoxymethyl oxirane, 2-methylphenoxymethyl oxirane, trityloxymethyl oxirane) on microcrystalline cellulose triacetate (MCTA) with 2-propanol - water resp. ethanol - water 4:1 or of 7 glycidyl ethers with mobile phases containing derivatized and underivatized cyclodextrins on chiral stationary phases. Detection under UV 254 and 366 nm. Quantitation by densitometry in reflectance mode at 254 nm.

J. Liq. Chrom. Rel. Technol. 27, 1981-1992 (2004). Study of the interaction between cholesterol and non-ionic surfactants by reversed-phase TLC using cholesterol-impregnated TLC plates and methanol - water mixtures. TLC on aluminum oxide impregnated by overnight pre-development in a solution of cholesterol dissolved in chloroform - acetone 1:1. 20 surfactants were tested (Arcopal, Sapogenat, Tween, Genapol, Myrj, and Brij). The intercept obtained from linear regression anal. (RM0), being characteristic for the strength of interaction, and the slope (b), being related to the surface area of surfactants in contact with cholesterol, were detected. Stepwise regression anal. (SRA) was performed to find relation between the structural parameters of surfactants and strength of interaction. Stacking interaction exists between cholesterol and the aromatic ring of the surfactants. The number of ethylene oxide units and length of the carbon chain in the surfactant molecules have significant effect on the strength of the interaction between the compounds studied.