Proceedings

aerosol agar airborne aircraft algae altitude ambient Andersen sampler atmos bacteria balloon biological Cladosporium collection efficiency colonies concentration contamination counts culture decrease density developed device diameter diffusion Dimmick distribution electrostatic precipitator Equation exobiology fallout fiber Figure filter paper flight flow frost point Goetz Gregory heat high altitudes humidity hygrometer impaction impactor indicated Inlet Cone instrument Junge laboratory latitude layer lithium chloride lower marcescens material mean free path measurements mechanism methods micro microbial microorganisms mixing ratio moisture molecules obtained organisms ozone particles plant plates pollen polyurethane pressure problem radiation radioactivity radiosonde resistance rocket sampler sampling sedimentation Soffen sphere spores sterile stratosphere studies surface survival techniques temperature thermal tion transport trap tropopause troposphere unit upper atmosphere vegetative cells velocity vertical viable voltage volume water vapor