DATE     98/12/29
                                       See alsoCHI1 
                                               CHI2 
                                               COAC 
    Procédure CALACTIV
    ------------------

  CHP1 = CALACTIV TAB1 TAB2 LENT1 ;

        Description
        -----------
        The CALACTIV procedure allow the calculation of activity
         in aqueous systems.

        Contents :
        ----------

      TAB1 : is a TABLE type object, subtype CHIMI1. (cf operator CHI1)
      TAB2 : is a TABLE type object, subtype CHIMI2. (cf operator CHI2)
      LENT1: LISTENTI
      CHP1 : is a CHPOIN type object. Contains the values of activity
            for each chemical species of LENT1.