Methods and apparatus for depositing an amorphous carbon layer on a substrate are provided. The membrane includes a plurality of pores, preferably filled with an erodible substance responsive to a selected characteristic of the blood product. Filter sections are coupled together by means of four direction couplers and surface grating couplers, and may be implemented as GSE photonic integrated circuit devices. Some embodiments provide an X-ray collimator that allows forming a scanning X-ray beam of desired size and flux independently of the beam angle. Thermo plastically extruded composition consists of each component by parts by weight as follows: 100 of resin ), 90-150 of non-halogen containing flame retardants, 1-20 of auxiliary secondary flame retardant agents, 2-4 of CNT and length under 20 \u03bcm and 0. A second base of the second bottom portion is coupled to the magnet.