sialon, 1375 side group or side-chain polymer liquid crystal, 1376 siemens , 1376 sievert , 1376 sigmatropic rearrangement, 1376 signal in analysis , 1377 silanes, 1377 silanols, 1377 silasesquiazanes, 1378silasesquioxanes, 1378 silasesquithianes, 1378 silathianes, 1378 silazanes, 1379 silicones, 1379 siloxanes, 1379 silver film, 1379 silyl groups, 1379 silyl radicals, 1380 silylene, 1380 simple shear, 1380 simulation technique in analysis , 1380 simultaneous interpenetrating polymer network, 1381 simultaneous pair transitions, 1381 simultaneous reactions, 1381 simultaneous semi-interpenetrating polymer network, 1382 simultaneous spectrometer, 1382 single cell protein (SCP), 1382 single escape peak, 1382 single scattering, 1382 single-beam (luminescence) spectrometer, 1383 single-electron transfer mechanism (SET), 1383 single-focusing mass spectrometer, 1383 single-photon timing, 1383 single-step reaction, 1384 single-strand chain in a polymer , 1384 single-strand macromolecule, 1384 single-strand polymer, 1384 singlet molecular oxygen (singlet molecular dioxygen), 1384 singlet state, 1385 singlet-singlet absorption, 1385 singlet-singlet annihilation, 1385 singlet-singlet energy transfer, 1385 singlet-triplet absorption, 1386 singlet-triplet energy transfer, 1386 singlet–triplet crossing, 1386 singly labelled, 1386 sink in atmospheric chemistry , 1387 sintering, 1387 size-exclusion chromatography (SEC), 1387 skeletal atom, 1387 skeletal bond, 1387 skeletal structure, 1388 skew, 1388