Oxidative and reductive cyclization methods also exist. Both substance and property dualism are opposed to reductive physicalism. It is also produced by reductive amination of acetaldehyde. One version of reductive physicalism is type physicalism or mind-body identity theory. The metastable oxidation state Cr(V) is achieved through reductive activation. Other types of explanation are Deductive-nomological, Functional, Historical, Psychological, Reductive, Teleological, Methodological explanations. L-PAC is then chemically converted to pseudoephedrine via reductive amination. Physicalism can be reductive or non-reductive. It can be deprotected to reveal the amine using reductive or strongly acidic conditions. Lie algebras are true more generally for reductive Lie algebras. This is an example of a reductive decarboxylation. This follows from an assumption about the possibility of reductive explanations. The reductive desorption occurs under two circumstances. This focuses attention on the representation theory of reductive groups. Copper hydride is also produced by reductive sonication.