Mating surfaces, nature

Metal mobility in soils is governed by interfacial processes, such as dissolution. The role of DOM in such processes will be determined by the nature t organic matter-surface associations. The surface complexation model pro-odes a conceptual framework for estimating the contributions of specific DOM components, particularly LMW organic ligands, to the mobilization f metals in soils. With this framework, the effects of humic substances on mineral dissolution can be interpreted to provide some insight into hu--mate-surface interactions. 

Joining of similar or dissimilar materials (adherent) by the application of a natural or synthetic substance (adhesive) to their mating surfaces which subsequently cures to form a bond (see 7.15F). 

The effect of the nature of mating surfaces on friction coefficient... 

In general, surfaces are different creatures than the bulk that spawns them. For instance, a water drop forms itself into a sphere because the water molecules inside the water drop have all their opportunities of hydrogen bonding met and are content. The water molecules at the surface have some unhappy hydrogen ends without their oxygen mate on an adjacent molecule and vice versa. This situation creates a tension, called surface tension, and the natural response of the system to minimize this tension... 

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