| http://www.w3.org/ns/prov#value | - o 40 when R a sorbitan fatty ester of the formula ##STR16## where each of p, q, r and s is an integer and the sum of said integers is from 0 to 100, R1 is H or --COR2 and R2 is alkyl, alkylphenyl, or dialkylphenyl 5 to 30 carbon atoms; or x and y are each integers of from 0 to 40 when R is --NH(CH2)3 O--R3, or ##STR17## where R2 is H or R3, and R3 is alkyl, alkylphenyl, or dialkylphenyl of from 5
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