An upstream amplifier is integrated on a substrate with a digital-to-analog converter to form an integrated circuit. In the method, the solid waste is melted into a liquid waste at first. The liquidus temperature of the first alloy and the liquidus temperature of the second alloy differ by not greater than about 15\xb0 C. The invention also concerns with a process for preparation of the System and a method for treatingpreventing diseases, by administering to a subject in need thereof, the System of the invention.