title: Comparison of routine techniques for cell breakage and release of beta-lactamase activity.
mesh_terms: D001419:Bacteria / Q000201:enzymology*; D001431:Bacteriological Techniques; D002458:Cell Fractionation / Q000379:methods*; D005615:Freezing; D009996:Osmotic Fragility; D014465:Ultrasonics; D001618:beta-Lactamases / Q000378:metabolism*
chemical_list: D001618:beta-Lactamases