| http://www.w3.org/ns/prov#value | - Suitable foam stabilizers are, e.g., polyvinyl alcohol, cellulose derivatives such as carboxymethylcellulose, sulphoxides of the formula R--SO--R' wherein R represents an alkyl radical having 8 to 18 carbon atoms and R' an alkyl radical having 1 to 4 carbon atoms, monoglycerides of fatty acids such as of lauric acid or oleic acid.
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