Today the term planar chromatography is commonly used as a synonym for high performance thin-layer chromatography (HPLTC) and conventional thin-layer chromatography (TLC). Originally it referred more generally to a family of techniques including TLC, some types of electrophoresis and paper chromatography, which all have in common a stationary phase in the form of a flat thin layer rather than packed into a column. Modern planar chrom-atography is a form of liquid chromatography and its history is closely linked to the development of chromatography as an analytical tool.

Early roots go back to Beyrinck who in 1889 separated hydrochloric and sulfuric acid by diffusion through a thin layer of gelatine on a glass plate. With the same technique, Wijsman in 1898 was able to demonstrate the presence of two enzymes in malt diastase. When at the end of the 1930s Tswett's column chromatography became successful, research

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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