Scientists, engineers, and technologists in many fields need a knowledge of chemistry because of the importance of chemistry in diverse technologies. In addition, to "classical" topics of chemistry, the new Encyclopedia covers nanotechnology, fuel cell technology, green chemistry, forensic chemistry, supramolecular chemistry, combinatorial chemistry, materials chemistry, and proteomics. This fifth print edition has been revised and updated, and includes over 200 new articles, as well as 1,300 updated articles.