Study of coordination equilibria in systems of coexisting mononuclear and polynuclear complexes by an isosbestic point-spectrophotometric method.

This paper reports a method for determining the stability constants of complexes in a system of coexisting mononuclear and polynuclear complexes based on analysis of dual isosbestic points. First it is necessary to determine the dissociation degrees of either of the two complexes concerned in two directions, and then their stability constants. With this method, the conditional constant can be evaluated by appropriate treatment and selection of the proper equations for solutions. For demonstration purposes the scandium/Xylenol Orange system was used to test the model and satisfactory results were obtained.

[The grafting of mixed pulp of autoepidermis and autodermis in full-thickness skin burns].

This article described the procedures of grafting of mixed pulp of autoepidermis and autodermis in 22 cases of extensive third degree burns. It solved the problem of the shortage of autoskin. The proportion of donor site to wound surface reached 1:24. As the mixed skin pulp contained a large quantity of autodermis, the wound surface healed well without rejection.