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Aqueous nucleic acid constituents uracil, uridine, and uridine-5‘-monophosphate are selectively adsorbed by a solid German peat-derived humic acid (GHA) and its tightly bound mercury(II) form (MGHA). Adsorption isotherms with GHA and MGHA adsorbents were obtained at 19 solute concentrations from 0 to 1.20 mM and seven fixed temperatures from 5.0 to 35.0 °C. Langmuir data analysis indicates that adsorption occurs in sequential steps A, B, and C, depending on the solute and experimental conditions. MGHA very strongly adsorbs low concentrations of uracil and site capacity vA for uracil adsorption on MGHA in step A increases with increasing temperature. The last steps of adsorption of relatively high concentrations of uridine, and uridine-5‘-monophosphate on MGHA are S-curves ascribed to increasing site capacity with increasing solute concentration. Comparison of the new data for adsorbents GHA and MGHA with data for adsorption of uracil, uridine, and uridine-5‘-monophosphate on compost-derived humic acid (CHA) from part 1 reveals similarities and differences. Nevertheless, linear plots of adsorption enthalpies vs entropies in all detected steps with CHA, GHA, and MGHA as adsorbents indicate that selective adsorption of nucleic acid constituents on different HAs is free energy buffered by similar mechanisms.

La volonté d’offrir un meilleur accès universel dans un système public se voit souvent confrontée à un désir du gouvernement à maîtriser ses dépenses dans le système de la santé. Les listes d’attente sont perçues comme un mécanisme de rationnement des soins, qui se substitue au rationnement fondé sur les prix, afin d’assurer l’équilibre entre l’offre et la demande. Nous cherchons à mesurer l’impact d’une politique financière incitative (un financement à l’activité) pour les hôpitaux sur l’évolution de l’accès aux services ainsi que la qualité des soins offerts.