modificateur

OBS: modificateur (adj): Qui a la propriété de modifier. Agent modificateur.
OBS: Modifier: Changer (une chose) sans en altérer la nature, l'essence.
OBS: [L]'état de surface des corps n'est pas forcément identique à leur état interne: les surfaces sont en général modifiées par action chimique ou adsorption.

CONT: Modifying Agents. The chemical and physical additives discussed in this section are variously described in flotation literature as regulators, conditioners or more specifically as depressants, activators, wetting agents, flocculants and dispersants. The practical requirement from the operator's viewpoint is the ability of the additive to sharpen selectivity as between the mineral species floated and that (or those) left in the pulp. ... The regulating chemicals used in flotation stimulate the desired surface activity of specific minerals in the pulp. Modifying agents therefore either reinforce or make possible the adsorption of collectors in the case of floating species, or aid hydration if they are active depressants.