466 



INDEX 



Serotonin, 304 



Sex hormones, 292-297 



male, 295-297 

 Silicon : 



in living cells, 176 



in plants, 195 

 Simple sugars. 19, 22 



distinguishing from other carbohydrates, 

 31 

 Sinigrin, 28 

 Sitosterol, 95 

 Skatole, 320, 354 

 Slipped tendon in chicks, 189 

 Snake venoms, lecithinase in, 99 

 Soaps, 86, 87 



water-insoluble, uses of, 88 

 Sodium : 



functions in body, 182 



in body fluids, 182 



with Addison's disease, 291 



with adrenals. 291 

 Sodium chloride, in nutrition, 182, 183 

 Sodium content of foods, table, 4.39 

 Sodium palmitate, 86 

 Solar energy, fraction intercepted by 



earth, 387 

 Solutions : 



molar, 163 

 , normal, 163 



standard, 163 



standardization of, 165 

 Sorbitol, production from glucose, 37 

 Sorbose, 36 

 Specific rotation, 24 

 Sperm oil. 92 

 Spermaceti, 92. 93 

 Sphingomyelins, 100 

 Sphingosine, 73, 100 



dihydro-, in cerebrosides. 101 

 Sprouting of stored vegetables, chemical 



control of, 407 

 Sprue, 248, 251 

 Standard solutions, 103 

 Standardization of solutions, 165. 166 

 Standards, primary, for titrations, 165 

 Staphylococcus aureus: 



effect of penicillin on, 375 * 



nitrogen requirements of, 358 

 Starch : 



acid hydrolysis of, 29 



elementary composition, 75 



granules, 54, 55, 56 



iodine test, 54 



occurrence, 54 



phosphorus in. 54 



synthesis of in plants, 399, 400 

 Steapsin, 86 

 Stearaldehyde, 101 

 Stearic acid, 77 

 Stercobilin, 318 

 Stercobilinogen, 318 

 Stereoisomerism, 23 

 Stereoisomers. 23 

 Sterility, relation of vitamin E to. 216, 



217, 219 

 Steroid ring system, 94 



Steroids, 94 



biosynthesis of, 340 

 Sterols. 94 

 Stilbestrol, 297, 298 

 Stored fat, dynamic state of, 335 

 Streptidine, 306 

 Streptococcus fecalis. 359 

 Streptococcus lactis, 360, 376 

 Streptomyces aureofaciens, 368 

 Streptomyces griseus, 365 

 Streptomyces rimosus. 368 

 Streptomyces venezuelae, 369 

 Streptomycin : 



bacteria dependent on, 367, .368 



formula of, 365-367 



mode of action, 367 



production of, .366 



resistance to, .367 



toxicity of, 366 

 Streptose, 365, 366, 367 

 Substrate, 270 

 Subtilin, 122 

 Succinic acid, bacterial formation of, .363, 



377, 383 

 Succinic acid oxidation, energy from, 421 

 Succinic dehydrogenase, 268 

 Sucrase, 262, 263 

 Sucrose : 



advantages of hydrolysis of, 34 



cost of food calories from, 43 



determination in foods, 44, 45 



food value, 43 



formation in plants. 397-399 



human consumption, 42. 43 



inversion of, 42, 43, 45 



occurrence, 42 



optical rotation of, 45 



jii-eparation of, 43 



production, 42 



structural formula. 44 

 Sucrose phosphorylase, 267 

 Sucrose synthesis, 399 

 Sugar alcohols, 21 

 Sugars : 



action of acids on, 26, 39, 52 



action of alkalies on. 31 



D- and L- forms of, 22 



desoxy, 20, 27 



formation in plants, 397, 398 



interconversion in body, 324 



melting points of, table, 36 



optical rotations of, table, 36 



reducing power of, 30, .31, 35, 41 



ring structures of, 24-26 



sweetness of, 43 

 Sulfa drugs, effect on intestinal bacteria, 



322 

 Sulfanilamide. 256 

 Sulfatase. 264 

 Sulfur compounds : 



in mustard, garlic, etc., 179 



required by animals, 192 

 Sulfur content of foods, table, 4.39 

 Sweet clover, toxicity of fermented, 221 

 Sweetening power of sugars, 43 

 Symbiosis, 403 



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