Schulze–Hardy rule, 1340 Schulz–Zimm distribution, 1341 scintillation, 1341 scintillation counter, 1341 scintillation detector, 1341 scintillation spectrometer, 1341 scintillators, 1342 scrambling, 1342 scrubber in atmospheric chemistry , 1342 scrubbing, 1342 seco-, 1343 second , 1344 second messenger, 1344 second of arc , 1344 second-order transition, 1344 secondary crystallization, 1344 secondary electron multiplier in mass spectrometry , 1345 secondary electron yield in in situ microanalysis , 1345 secondary electrons (se) in in situ microanalysis , 1345 secondary fluorescence in X-ray emission spectroscopy , 1345 secondary ionization in mass spectrometry , 1346 secondary isotope effect, 1346 secondary kinetic isotope effect, 1346 secondary metabolites, 1346secondary pollution (emissions), 1347 secondary radiation, 1347 secondary structure, 1347 secular equation, 1347 secular equilibrium, 1347 sediment, 1348 sedimentation, 1348 sedimentation coefficient, , 1348 sedimentation equilibrium, 1348 sedimentation field strength, 1348 sedimentation in chemistry , 1349 sedimentation potential difference (sedimentation potential) , 1349 sedimentation velocity method, 1349 sedimentation velocity, , 1349 sedimentation volume, 1349 segment in analytical chemistry , 1350 segmented copolymer, 1350 segregated star macromolecule, 1350 segregation, 1350 segregation in polymers , 1351 selected ion monitoring in mass spectrometry , 1351 selection in biotechnology , 1351 selection rule, 1351 selective corrosion, 1352 selective elution in chromatography, 1352 selective in analysis , 1352 selective micro-sample in spectrochemical analysis , 1352 selective poisoning in catalysis, 1353 selective preconcentration in trace analysis , 1353 selective sample, 1353 selective solvent in polymer chemistry , 1353 selectively labelled, 1353 selectivity, 1354 selectivity coefficient, in ion exchange chromatography , 1354 selectivity factor in ion exchange chromatography , 1355 selectivity factor, , 1355 selectivity in analysis , 1355 selectivity of a reagent , 1356 selectivity ratio, 1356 selenenic acids, 1356 selenides, 1356 seleninic acids, 1356 selenocyanates, 1356 selenols, 1357selenones, 1357 selenonic acids, 1357 selenoxides, 1357 self inductance, , 1357 self-absorption, 1358 self-absorption broadening of a spectral line , 1358 self-absorption effect in luminescence spectroscopy , 1358 self-absorption factor of a radiation source , 1358 self-diffusion coefficient, 1359 self-localized excitations in conjugated organic polymers , 1359 self-poisoning in catalysis , 1359 self-quenching, 1360 self-reversal, 1360 self-shielding, 1360 selones, 1360 semi-empirical quantum mechanical methods, 1360 semi-interpenetrating polymer network, 1361 semi-rigid chain, 1361 semicarbazones, 1361 semicoke, 1361 semiconductor, 1362 semiconductor detector, 1362 semiconductor laser [obsolete] , 1362 semiconductor-metal transition, 1362 semioxamazones, 1363 semiquinones, 1363 semisystematic name (semitrivial name), 1363 seniority (senior) in organic nomenclature , 1363 sensitive area of a radiation detector, 1363 sensitive volume of a radiation detector , 1364 sensitivity in mass spectrometry , 1364 sensitivity, in metrology and analytical chemistry , 1364 sensitization, 1365 sensitization in colloid chemistry , 1365 sensitized luminescence, 1365 sensitizer, 1365 separability assumption, 1365 separated flame in flame spectroscopy , 1366 separation coefficient [obsolete] , 1366 separation factor, in column chromatography , 1366 separation factor, in liquid- liquid distribution , 1366