| http://www.w3.org/ns/prov#value | - The term ???non-degradable??? refers to a chemical structure that cannot be cleaved under physiological conditions.The term ???alkyl,??? as employed herein, includes both straight and branched chain hydrocarbons containing about 1 to about 20 carbons, particularly about 1 to about 15, particularly about 5 to about 15 carbons in the main chain.
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