6)
Monomer: means a
substance which is capable of forming covalent bonds with a sequence of additional like or unlike molecules under the
conditions of the
relevant polymer-forming reaction used for the particular process;
39)
Substances which occur in
nature: means a naturally occurring
substance as such, unprocessed or processed only by manual, mechanical or gravitational means, by
dissolution in
water, by flotation, by extraction with
water, by steam distillation or by heating solely to
remove water, or which is extracted from
air by any means;
41)
Alloy: means a metallic
material, homogenous on a macroscopic scale, consisting of two or more elements so combined that they cannot be readily separated
by mechanical means.