nimbostratus cloud in atmospheric chemistry , 992 nitramines, 992 nitrenes, 992 nitrenium ions, 993 nitrification, 993 nitrile imides, 993 nitrile imines, 994 nitrile oxides, 994 nitrile sulfides, 994 nitrile ylides, 994 nitriles, 995 nitrilium betaines, 995 nitrilium ions, 995 nitrimines, 995 nitro compounds, 996 nitrogen fixation, 996 nitrogen laser, 996 nitrolic acids, 996 nitrones, 996 nitrosamides, 997 nitrosamines, 997 nitrosimines, 997 nitroso compounds, 997 nitrosolic acids, 998 nitroxides, 998nitroxyl radicals, 998 no carrier added, 998 no observed adverse effect level (NOAEL), 998 no-bond resonance, 999 no-load indication (for a precision balance), 999 no-observed-effect-level (NOEL), 999 nodal plane, 999 noise, 999 nominal linear flow, in chromatography , 1000 nominally labelled tracer, 1000 non-calorimetric thermophysical measurements, 1000 non-crossing rule, 1000 non-crystalline electrodes, 1000 non-destructive activation analysis, 1001 non-dissociative chemisorption, 1001 non-draining, 1001 non-equilibrium reaction, 1001 non-graphitic carbon, 1001 non-graphitizable carbon, 1002 non-ideal, linear chromatography, 1002 non-ideal, non-linear chromatography, 1002 non-ideal chromatography, 1002 non-isotopic labelling, 1003 non-Kekulé molecules, 1003 non-linear chromatography, 1003 non-linear distribution isotherm in chromatography , 1003 non-linear optical effect, 1004 non-linear optical polymer, 1004 non-linear optical techniques, 1004 non-linearity error in spectrochemical analysis , 1005 non-polarized interphases, 1005 non-radiative decay, 1005 non-specific adsorption, 1005 non-uniform corrosion, 1005 non-uniform polymer, 1006 non-vertical energy transfer, 1006 nonadiabatic coupling, 1006 nonadiabatic electron transfer, 1006 nonadiabatic photoreaction [obsolete] , 1006 nonbonded interactions, 1007 nonbonding molecular orbital, 1007 nonclassical carbocation, 1007 nonclassical structure, 1007 nonselectively labelled, 1008