Two calculation models of mass action concentrations for CaO-MgO-SiO_2-Al_2O_3-Cr_2O_3 penta-slag was presented whether 3CaO·Cr_2O_3·3SiO_2 was existe
2,2'-Arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cycIohexene-l-one) 41-s produced from reaction between dimedone with various aldehydes in acetonitrile using