| http://www.w3.org/ns/prov#value | - Gels are in particular aqueous solutions or suspensions of the active substances in which gel formers, preferably those of the group of cellulose ethers, for example methyl cellulose, hydroxyethyl cellulose or carboxymethyl cellulose, or of the vegetable hydrocolloids, such as sodium alginate, tragacanth or gum arabic, are dispersed and swelled.
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