It's that time of year again. Fall, when the leaves turn color and the Yankees turn into spectators. At least one of these is enjoyable. A lesson on the chemistry of colorful leaf pigments shows that, ...

Thin layer chromatography is used to analyse mixtures: determine the number, identity, and purity of compounds present in a mixture. This technique can also be used to visualize the progress of a ...

Thin-layer chromatography (TLC) was widely used in the 1960s and 1970s for pesticide residue analysis, but only to a limited extent since gas–liquid chromatography (GLC) and high performance liquid ...

MIXTURES in several proportions of petroleum ether (boiling point 30°–60° C), diethyl ether and acetic acid have been widely used as solvents for the separation by thin layer chromatography on silica ...

AN adverse reaction to local anesthetics has long been recognized as a calculated risk in the use of these drugs. 1 If such a reaction occurs characteristic clinical signs and symptoms signal the ...