共 50 条
- [41] A potentiometer for measuring voltages of 10 microvolts to an accuracy of 0.01 microvolt JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS, 1939, 22 (4/6): : 431 - 439
- [42] Further studies in the hydrogen ion concentrations of nasal secretions ARCHIVES OF OTOLARYNGOLOGY, 1938, 27 (01): : 83 - 90
- [43] NEW POTENTIAL FLUORESCENT INDICATORS FOR MEASURING INTRACELLULAR ION CONCENTRATIONS ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1994, 208 : 243 - MEDI
- [44] Optimization of an electrolyte conductivity detector for measuring low ion concentrations LAB ON A CHIP, 2002, 2 (02): : 121 - 124
- [45] On measuring hydrogen ion concentration of sea water. BIOCHEMISCHE ZEITSCHRIFT, 1910, 24 : 387 - 415
- [46] Apparatus for measuring hydrogen-ion concentration of the soil INDUSTRIAL AND ENGINEERING CHEMISTRY, 1928, 20 (01): : 421 - 423
- [47] Direct-reading measuring instruments: claim and reality - a discussion paper GEFAHRSTOFFE REINHALTUNG DER LUFT, 2020, 80 (10): : 385 - 389
- [48] A DIRECT-READING INSTRUMENT FOR MEASURING UNBALANCED IMPEDANCES AT DECIMETRIC WAVELENGTHS PROCEEDINGS OF THE INSTITUTION OF ELECTRICAL ENGINEERS-LONDON, 1950, 97 (47): : 199 - 205
- [49] A PRECISE DIRECT READING PHASE AND TRANSMISSION MEASURING SYSTEM FOR VIDEO FREQUENCIES BELL SYSTEM TECHNICAL JOURNAL, 1949, 28 (02): : 221 - 238