concentration of proteins is saturated at early times. This behavior qualitatively reproduces the Vroman effect, apart from the behavior of Fib that here is monotonic, while in experiments has a maximum due to the competitive adsorption with heavier and more surface-affine plasma proteins, like the high molecular weight Kininogen, not included in our model [@LeDuc1995; @Turbill96].

![Simulations at $T=300$ K and (a) $X_P=100\%$, (b) $X_P=50\%$ and (c) $X_P=25\%$ show that, at any considered dilution, surface concentration $C^S_A$ of Alb (), $C^S_I$ of IgG () and $C^S_F$ of Fib ($\Delta$) are not all monotonic with time, while their sum ($\nabla$) is monotonic within our numerical precision. For sake of clarity we plot the symbols only for a limited number of times. Bulk concentrations are as indicated in the text. Errors are smaller than symbol sizes. []{data-label="f1"}](Fig2)

Effect of Plasma Dilution
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When $X_P$ is reduced the dynamics of the process slows down (Fig. \[fdil300\]). This is consistent with what is observed in experiments [@Brash1984] and was reproduced by kinetic models with displacement rates, “liberation” rates and semipermanently adsorbed state for Fib [@LeDuc1995]. Here we can observe the slowing down not only for Fib, but also for the competing proteins IgG and 