The research of a mine in no way impairs the rights of ownership of the land in which the mine is located.
The uncertainty of this mass impairs the accuracy of the method.
Ordinarily carbon is used as the electrode material, but when carbon comes in contact at high temperatures with any metal that is capable of forming a carbide a certain amount of combination between them is inevitable, and the carbon thus introduced impairs the mechanical properties of the ultimate metallic product.
When present in other metals, even in very small quantity, bismuth renders them brittle and impairs their electrical conductivity.
Tannin is a hardening and astringent substance, and in large quantities impairs digestion.