used lab equiptment

keyser-soze at hushmail.com keyser-soze at hushmail.com
Thu Oct 18 10:32:58 PDT 2001


A specialized ultrasonic device is not required to produce micron fine aerosol powders.  All one needs is a used and cleaned print head assembly and its piezo pulse circuitry.  Nozzle apertures are typically 25-50 micron and if the material is suspended, in weak concentration, in a solution which quickly evaporates but doesn't harm the spores it should produce moderate quantities of fine powder quickly.  

If smaller sizes are desired a field ring charged to 1000-3000v DC can be placed around and in front of the nozzles.  If operated in sync with the nozzle pulses it can cause a the emerging droplets to cascade to nanometer size via the electrospray effect (now becoming common in drug production).  See http://www.essex.ac.uk/bs/staff/colbeck/index.htm#appas





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