J. of Chromatogr. A 1218 (45), 8273-8280 (2011). Study of the chromatographic processes in a new variation of a Smin-chamber with a counter plate (a Smin(CP)-chamber) positioned at a small distance above a separating plate. The adsorption layers of the separating plate and the counter plate face each other. Use of a dry counter plate in the Smin-chamber lead to an increase of up to 50 % in the volume of the mobile phase that migrates through the separating plate. This lead to higher Rf values, especially in the lower Rf range, improved the efficiency of separation more than two times, and increased the peak resolution of the method by 25 %. However there was also an increase in the experiment duration by 20-50 % depending on the size of the used plate.

J. Planar Chromatogr. 29, 66-71 (2016). Controlled gas phase HPTLC of benzoic acids (benzoic o-, m-, p-hydroxybenzoic, 2,4-dihydroxybenzoic, nitrobenzoic, o-, m-, p-aminobenzoic, o- and p-chlorobenzoic, o- and p-bromobenzoic, and o-phthalic acids) on silica gel, RP-18 and polyamide-11 with hexane – 2-propanol 19:1. This variant was based on the use of a gas phase (carbon dioxide, ammonia or acetic acid) moving over the TLC plate for regulation of the stationary and mobile phases. The most considerable change in the retention of benzoic acid derivatives was observed for normal-phase plates due to change of acid-base properties of stationary and mobile phases.

Part 2: Comparative study on centrifugal layer chromatography (CLC) and SCLC for the separation of furocoumarin isomers. J. High Resol. Chromatogr. 8, 132-134 (1985). Preparative separation of furocoumarin isomers (isobergapten, pimpinellin, bergapten, isopimpinellin, sphondin) on silica containing calcium sulphate hemihydrate with hexane - THF 7:3, hexane - chloroform - THF 63:16:1, dichloromethane. Detection by UV 254 and 366 nm.

J. High Resol. Chromatogr. 8, 265-266 (1985). Description of gravity flow circular TLC for preparative separations by which the polycyclic aromatic hydrocarbon fraction of a creosote extract is isolated. A 200 Ál concentrated extract spotted at the center of the plate positioned 1 cm beneath the stem of a separation funnel. The spot was eluted with hexane, and the PAH-band focused with benzene. Detection under UV light.Polycyclic aromatic hydrocarbons, preparative TLC.

J. High Resol. Chromatogr. 10, 352-356 (1987). Description of fundamental factors causing the "disturbing zones" in OPLC. Possibilities for the elimination were discussed. They consist of a pre-run with hexane in the case of apolar substances, or with hexane or a solvent in which the components are unable to migrate in the case of polar substances.

Planta Med. 1988, 219-221. TLC of flavonoids and xanthones on silica with chloroform - methanol - water 70:30:3, cyclohexane - ethyl acetate 1:2 and on polyamide with methanol - acetic acid 50% 9:1. Preparative separation by centrifugal TLC (2 mm silica plates) with toluene - ethyl acetate mixtures.

J. Planar Chromatogr. 2, 138-141 (1989). To overcome structure signals of the HPTLC-plates the concept of multiple scanning at changed angles of a planar chromatogram rotated stepwise was used. The procedure does not falsify raw data and has nothing to do with any kind of smoothing. The authors work with the mean values but do not touch the original raw data.

Proc. 6th Int. Symp. Instrum. Planar Chromatogr., (Interlaken 1991), Inst. Chroma-togr., Bad Dürkheim, FRG, 245-246 (1991). Description of a time-controlled semi-automated developing system for small TLC-plates. The system consists of a digital timer and a simple mechanical unit that lower the glass chamber to stop development.