A pharmaceutical or medicinal preparation comprising a mixture of herbs including Glycine max, Asparagus racemosa, Boerhavia diffusa, Withania somnifera, Saraca indica, and Coleus forskohlii, or a mixture of the active ingredients that have been extracted from those herbs. The conveyor belt has the feature that at least the most outward lying leg of a link has a third hole; the pin is inserted with its free end into the third hole of the link or a link of an adjacent coupling element; and the pin is substantially fixed relative to each link on the sides of the conveyor belt. Methods of using these compounds for modulation of PTEN expression and for treatment of diseases and conditions associated with expression of PTEN are provided. The convection heating air is pressurized with a compressor, cleaned with a filter.