| http://www.w3.org/ns/prov#value | - The aldehyde may be an aromatic aldehyde, such as benzaldehyde, tolualdehyde (o-, m-, or p-) or salicylaldehyde.Any type of oxidoreductase enzyme can be used to cross-link the humic acid, including peroxidases and hydrogenases.The cross-linking is effected by reacting the humic acid with the aldehyde or oxidoreductase enzymes such as peroxidase enzymes at room temperature or slightly above room te
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