Get help from a doctor now âº. Spinal disease: Basically those terms describe changes in vertebrae that are affected by arthritis or degenerative changes. Facets are the small posterior joints at each level of spine. Disease there is again a component of arthritis.Osteophytes are spurs which occur as areas of bone and joint are stressed and try to protect their structures.Endplate sclerosis is bony thickening seen at vertebral disc area.isease there is again a component of arthritis. Osteophytes are spurs which occur as areas of bone and joint are stressed and try to protect their structures. Endplate sclerosis is bony thickening seen at vertebral disc area.
For one, heterogeneous catalysts can be separated from a reaction mixture in a straightforward manner, such as by filtration. In this way, expensive catalysts can be easily and effectively recovered, which is an important consideration for industrial manufacturing processes.
A catalyst in the same phase (usually liquid or gas solution) as the reactants and products is called homogeneous catalyst. A catalyst that is in a separate phase from the reactants is said to be a heterogeneous, or contact, catalyst. Contact catalysts are materials with the capability of adsorbing molecules of gases or liquids onto their surfaces. An example of heterogeneous catalysis is the use of finely divided platinum to catalyze the reaction of carbon monoxide with oxygen to form carbon dioxide.