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CPC - G01N - 15.04.2013 - page 3EtchingG01N 1/34 . . PurifyingCleaning { ( processes or apparatus for extracting or separating nucleic acids frombiological samples C12N 15/1003 ) }G01N 1/36 . . Embedding or analogous mounting of samplesG01N 1/38 . . Diluting, dispersing or mixing samplesG01N 1/40 . . Concentrating samplesG01N 1/4005 . . . { by transferring a selected component through a membrane }G01N 1/4022 . . . { by thermal techniques; Phase changes }G01N 1/4044 . . . { by chemical techniques; Digestion; Chemical decomposition }G01N 1/405 . . . { by adsorption or absorption }G01N 1/4055 . . . { by solubility techniques }G01N 1/4077 . . . { by other techniques involving separation of suspended solids }G01N 1/42 . . Low-temperature sample treatment, e.g. cryofixationG01N 1/44 . . Sample treatment involving radiation, e.g. heatG01N 3/00Investigating strength properties of solid materials by application of mechanicalstress ( strain gauges G01B ; measuring stress in general G01L )NOTE-This group covers the stressing of materials not only below but also beyond theelastic limit, e.g. until breaking occurs.G01N 3/02 . DetailsG01N 3/04 . . ChucksG01N 3/06 . . Special adaptations of indicating or recording means ( indicating or recordingmeans for measuring in general G01D )G01N 3/062 . . . { with mechanical indicating or recording means }G01N 3/064 . . . { with hydraulic indicating or recording means }G01N 3/066 . . . { with electrical indicating or recording means }G01N 3/068 . . . { with optical indicating or recording means }G01N 3/08 . by applying steady tensile or compressive forces ( G01N 3/28 takes precedence )G01N 3/10 . . generated by pneumatic or hydraulic pressure ( G01N 3/18 takes precedence )G01N 3/12 . . . Pressure testing ( testing fluid-tightness G01M 3/00 )G01N 3/14 . . generated by dead weight, e.g. pendulumgenerated by springs tension ( G01N 3/18 takes precedence )G01N 3/16 . . applied through gearing ( G01N 3/18 takes precedence )G01N 3/165 . . . { generated by rotation, i.e. centrifugal force ( for testing structures or apparatusG01M 19/00C ) }G01N 3/18 . . Performing test at high or low temperaturesG01N 3/20 . by applying steady bending forces ( G01N 3/26 , G01N 3/28 take precedence )G01N 3/22 . by applying steady torsional forces ( G01N 3/26 , G01N 3/28 take precedence )