Substance X 387, 388, 615, 704, 2118 



Substances, dissolved 446 



, harmful 1389 



, interfering 586 



, release active 387 



, transmitter 710 



Substitution, position of 700 . 



Substrate/substrate effects 85, 89, 139, 165, 211, 268, 276, 298, 1193, 1433, 

 1646, 1825, 1897 



composition 783 



concentration/substrate reaction velocity 747 



, depressions in 276 



, exposed above 457 



firm with oyster shell debris 1246 



for mineral deposition, original 1374 



, kind of 1025 



-level phosphorylations 856 



of pea gravel and crushed oyster shell 1294 



organic content 717 



particle size 717 



proteins 837 



, sand 1045 



, stability in the 1719 



to 18 inches, penetrated 675 



, type of 719, 824 



, unselective of 1528 

 utilization 325 



Substrates, hard or soft 621 



were tolerable 1241 



Substratum, with or without 1503 



Subtidally 298, 537, 538 



Success and failure, criteria of 699 



not yet achieved in United States 1592 



Succinate dehydrogenase (SD) 750 



formation 2147 



oxidation (SO) 747, 748 



oxidoreductase 745, 746, 747, 748 



synthesis 2200 



Succinic dehydrogenase 130, 1029 



activity 853, 1029 



Succumbs at -6°C 1491 



Suction 358 



Sudanophil droplets 2065 



Suffolk County, N. Y. 927, 1317 



Sugar, reducible 1325 



Sugarloaf Key, Fla. 2047 



Sulfa drugs 446 



818 



