| http://www.w3.org/ns/prov#value | - -O)x --CH2 --CH2 --OH; polycationic surfactants of formula (IV): R--NH(CH2 --CH2 --CH2 --NH)x --CH2 --CH2 --CH2 --NH2 ; wherein R is a C8 to C18 hydrocarbon chain and x is from 1 to 10 in the surfactants containing nitrogen and from 4 to 16 in the surfactants containing oxygen, said treatment being carried out in a modification regulating medium selected from the group consisting of urea, organic
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