2) Nomenclature. The nervous disease first reported in 1974, was named Viral Leukoencephalomyelitis of Goats (VLG). When it became apparent that arthritis could also result from the same virus infection, the name of the disease was changed to Caprine Arthritis Encephalitis Syndrome (CAE). It is now apparent that the virus also produces changes in the lung and udder. The name CAE however still remains in place.
chemical - of or made from or using substances produced by or used in reactions involving atomic or molecular changes; chemical fertilizer. noun compound, drug, substance, synthetic substance, potion The whole food-chain is affected by the over-use of chemicals in agriculture.
A chemical compound is a substance consisting of two or more elements chemically-bonded together in a fixed proportion by mass. By the definition given, a compound is a chemical substance with a definite chemical composition.ll of the atoms are the same, same number of protons and electrons. This means that they are all structurally and behaviorally the same = same composition. A compound on the other hand is made of atoms that are not the same.