J. Planar Chromatogr. 18, 13-18 (2005). Re-investigation of the initial stage of the retention process in TLC, namely the moment of the first contact between the analyte deposited at the origin and the mobile phase employed. Presentation of the results obtained in two different ways, i. e. as the dependence of densitometrically measured concentration profiles and of retardation factors (RF) on the amount of analyte and on the mode of application (dry or wet) to the stationary phase layer.

J. Planar Chromatogr. 24, 454-462 (2011). The scientometric study of the changes in basic chromatographic characteristics was carried out based on the analysis of papers published from 1980 to 1990 and from 2000 to 2010 in the following journals: J. Planar Chromatogr., Chromatographia, Anal. Chem., J. Anal. Chem., Russian J. Physical Chem., Sorption and Chromatographic Processes (Russia) as well as the abstracts of the articles published in CAMAG Bibliography Service (CBS). Based on the contents of the published articles the main analytical characteristics of planar chromatography were described: type of chromatographic chamber, variants of the plate used, development, previous preparation of the chamber and the plate, application of sample, composition of mobile phases, etc. The results obtained are of interest for analysts, manufacturers and designers of chromatographic equipment and apparatus for planar chromatography and other specialists working in the different areas of planar chromatography.

Chromatographia 21, 79-82 (1986). TLC of aromatic DL-amino acids on cellulose with pyridine - ethanol - water in various proportions. Discussion of the relationship between the resolution of DL-amino acids and cellulose conformation change under hydrophobic conditions.

J Chromatogr, 365, 117-122 (1986). Investigation of the relationships between reversed phase TLC RM values, Log p values and GLC retention data. Investigated: 31 aniline derivatives on six columns of different polarity by stepwise regression analysis. Discussion of the influence of organic solvents, partition coefficients, temperature and stationary phase on the RM values in TLC and on GLC retention indices.

Separations of aromatic amino acids, biogenic amines, alkaloids, dyes and phenols and determination of hydrophobic constants. J. Chomatogr. 440, 165-182 (1988). TLC of the title compounds on cellulose or paper with various solvent systems. Detection under UV 254 nm and 366 nm, iodine vapor or by spraying with ninhydrin for amino acids and biogenic amines. Determination of hydrophobic constants. Study of the mechanism of adsorption on cellulose from aqueous solutions.

J. Liquid Chromatogr. 12, 919-935 (1989). Investigation of chromatographic behavior of some polar organic dyes and dye intermediates on thin layer of various forms of cationic and anionic exchange resins, indicating the great effect of the stationary ion and mobile ion of both types of exchangers on both level of tailing and Rf values of the adsorbed compounds.

Chromatographia 37, 107-109 (1993). Study of the influence of the distance between the solvent entry and the starting zone position (Z0) on the average plate height. This factor was found to be of major importance and be optimized. The Guiochon and Siouffi model greatly underestimates the plate height for low values of the starting zone position.

Nyiredy, A. Kakuk (eds.): Planar Chromatography 2000, Lillafüred, Hungary, 24-26 June 2000, Res. Inst. for Med. Plants, p. 237-248. Determination of log kw values seem to be very useful for description of biological activity of organic substances (antifungal activity of benzanilides). Very good correlation between log kw values and minimal inhibitory concentration (MIC) values for all benzanilides and dermatophytes is observed. HPTLC of 9 benzanilides on RP-18 with methanol and its aqueous solutions. Quantitation by absorbance measurement at 325nm.