smog chamber in atmospheric chemistry , 1390 smog in atmospheric chemistry , 1390 smog index in atmospheric chemistry , 1390 smoke, 1391 soap, 1391 soap curd, 1391 soap film, 1391 soft-segment phase domain, 1391 soiling in atmospheric chemistry , 1392 sol, 1392 sol fraction, 1392 sol-gel coating, 1392 sol-gel critical concentration, 1393 sol-gel material, 1393 sol-gel metal oxide, 1393 sol-gel process, 1393 sol-gel silica, 1393 sol-gel transition, 1394 solar conversion efficiency, 1394 solar flare, 1394 solar radiation in atmospheric chemistry , 1394 solid angle, , , 1395 solid phase antibody radioimmunoassay, 1395 solid polymer electrolyte, 1395 solid state lasers, 1395 solid support in column chromatography , 1396 solid volume in column chromatography , 1396 solidification, 1396 solidus, 1396 soliton, 1396 solubility, 1397 solubility parameter, , 1397 solubility product, 1397 solute, 1398 solute-volatilization interference in flame spectroscopy , 1398 solution, 1398 solvation, 1398 solvation energy, 1399 solvatochromic relationship, 1399 solvatochromism, 1399 solvent extraction, 1399