Terminology

It is now agreed that pyrolysis (alternatively, thermal breakdown, thermal cracking, thermal decomposition, thermal degradation or thermal fragmentation) is the transformation of a compound into another substance or substances through the agency of heat alone. Indeed, most pyrolyses are thermal decompositions or fragmentations. Be warned that the formation of larger rather than smaller molecular weight substances is not only possible but, under certain conditions, highly probable (as the writer learnt to his cost very early in the development of the method).

A pyrogram is a chromatogram of a pyrolysate. It was originally used in the sense of a fingerprint and a tentative identity assigned after comparison with a library of known pyrograms which had been prepared under as near identical conditions as was then possible. With the advent of coupled gas chromato-graph/mass spectrometer and discriminative mathematical treatments of vast quantities of data, the technique was promoted to a much higher plane but it should be remembered that statistical methods are, on occasion, far from infallible.

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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