A method and apparatus for measuring the presence or absence of interaction between at least a first and second material of interest by measuring osmotic pressure changes in an osmotic cell. Changes in osmotic pressure are determined by measuring the amount of compression exhibited by a compressible,...http://www.google.com.au/patents/US7666680?utm_source=gb-gplus-sharePatent US7666680 - Osmotic reaction detector for detecting biological and non-biological reactions
