J. Planar Chromatogr. 10, 320-331 (1997). Discussion of the current state of chiral separations by TLC with particular reference to recent advances. The use of derivatizing reagents to produce diastereomers which can be resolved by conventional phases is described, together with the use of chiral TLC systems. These systems include those based on chiral stationary phases, phases modified by coating with a chiral selector, and chiral mobile phases. The examples provided illustrate the wide range of structural types which can be readily resolved into their enantiomers by planar chromatographic methods. Future directions of separations in TLC are also discussed.

J. Chinese Trad. Patent Med. (Zhongchengyao) 23 (5), 371-373 (2001). A review with 29 references on the title topic, involving the pharmacological actions, preparation procedures, quality control, dosage improvement, etc. of the Chinese traditional patent medicine, emphasizing on the wide application of TLC in its quality control.

J. Chromatogr. A 1053 (1-2), 15-26 (2004). The mini-review summarizes the develoment of different classes of novel quaternarized heterocyclic compounds able to modulate and reverse the electroendoosmotic flow (EOF) in a most peculiar manner. The first class comprises mono-salt compounds, with the determinant omega-iodoalkyl chains of different lengths (typically C4-C8), able to be adsorbed by silicas at alkaline pH and spontaneously alkylate ionised silanols, thus becoming covalently affixed to it. The second class is constituted by di-salt compounds, attached at the termini of an alkyl chain of variable lengths (typically C4-C8). This second class is unable to bind covalently silica surfaces although in thin-layer chromatography it exhibits an extraordinary affinity for silica beads, contrary to the first one. On the basis of the strikingly different behaviour structural rules are derived for the minimum requirements for general classes of amines to bind to silica walls and modify EOF. For compounds unable to bind covalently to the wall, the most important structural motif is two quaternary nitrogens spaced apart by a C4 chain: this seems to be the average distance (i.e. 0.8 nm) between two adjacent, ionized silanols for a snug fit. The other structural binding motif is the "hydrophobic decoration", i.e. the ratio of charged groups to alkyl residue in the various amines; amines with high levels of such alkane groups (i.e. with higher hydrophobicity), seem to bind more tenaciously to the wall, probably due to hydrophobic interaction not to the wall but among the amine derivatives themselves when carpeting the silica.

CBS Publishers & Distributors Pvt Ltd, New Dehli, 2010. Short review on planar chromatography in food analysis. Certain well-known applications are mentioned but important publications and recent scientific data is lacking.

Second edition, revised and expanded. Marcel Dekker Inc., New York, Basel, Hong Kong, ISBN 0-8247-9454-0, 1104 pages, 3380 references, 352 drawings and photographs, 312 tables.

Encyclopedia of Chromatography Third Edition 1, 874-877 (2009). The author describes the application of TLC to predict the optimum isocratic and gradient eluent composition in traditional and modern flash chromatography. For method development, the hRf should be between 15 and 35 for the component of interest. A relationship between hRF and column volumes for FC is proposed and solvent strenght calculations for different systems are described.

Springer Verlag, Heidelberg 1986, 139 pages. Review on recent progress in isolation techniques for natural products. PLC, centrifugal TLC, column chromatography, prep. HPLC, counter-current chromatography of various plant constituents. Numerous separation condition. and critical observations are reported.

J. of Chromatogr. A 1218 (19), 2676-2683 (2011). A review on bioautography on TLC plates as an important means of detecting the biological activity of a sample. The technique requires only small amounts of sample, is ideal for the investigation of plant constituents which often occur as complex mixtures, and can be used for the target-directed isolation of these constituents. In contrast to HPLC, many samples can be run at the same time on TLC, and organic solvents, which cause inactivation of enzymes or death of living organisms, can be completely removed before biological detection. Many bioassays are compatible with TLC and antimicrobial, radical scavenging, antioxidant activities and enzyme inhibition tests can be applied.