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A significant factor preventing the achievement of zero chromium in the effluent from the after-chrome dyeing process is the presence of soluble proteins in the dyebath. These proteins can react with the dichromate anion and thus interfere with its reaction with the wool fibre and dye molecules. This understanding may lead to the development of very low chromium in effluent dyeing methods that ensure the viability of chrome dyeing. [ABSTRACT FROM AUTHOR]

The article reflects the opinion of the author on the indirect occurrence of organism's mutability, an alteration in the inherited nucleic acid sequence of an organism. The author cited various theories in mutation such as an increased mutation rate based on female choice. He also said that mutator alleles can also be favored by strong selection for phenotypic variation, such as that imposed by immunological attack against pathogens, along with stable linkage to beneficial mutations.