A novel method for coating calcium phosphate with trace elements extracted from bone using electrical stimulation.

Hydroxyapatite (HAp) is a biomaterial used because of its high potential for improving the healing of bone fractures. HAp is typically prepared using synthetic methods. However, synthetic HAp generally does not contain trace elements, which are considered to be important factors in the healing process.

Strong ferromagnetic exchange couplings in copper(II) and nickel(II) complexes with a paramagnetic tridentate chelate ligand, 2,2'-bipyridin-6-yl tert-butyl nitroxide.

A paramagnetic ligand 6bpyNO (2,2'-bipyridin-6-yl tert-butyl nitroxide) is a newcomer in the field of metal-radical hybrid magnetic materials. Complexes [CuII(6bpyNO)Cl2] and [NiII(6bpyNO)2](PF6)2 having highly planar chelate rings showed considerably strong ferromagnetic exchange couplings J/kB = 202 and 192 K, respectively, across the direct radical oxygen coordination bonds (the spin Hamiltonian is defined as -2JSi.Sj).