By simultaneously and directly measuring the diffusion coefficient of individual particles, the dedicated Nanoparticle Tracking Analysis (NTA) software suite uniquely allows the user to automatically count and size the viruses and aggregates in a sample. Results are displayed as graphs of size against count of individual particles (or size vs. relative brightness). This particle-by-particle approach overcomes the limitations inherent to other particle analysis systems which only generate mean particle size distribution data.
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