197 



Sulphur 



Starch, soluble, mixed with agar agar, III. 

 298; IV. 343. 



— mixed with gelatin, III. 187, 188; IV. 

 342, 343. 



— preparation, III. 187; IV. 343; V. 

 196. 



— tannin reaction, V. 21, 22*. 



Starch grain: crystallization of granu- 

 lose in the amyloplast, V. 197, 198. 



— doublé refraction, IV. 346; V. 197. 



— nitrogen in, V. 24, 198. 



— structure, III. 138; V. 21, 22*-24, 

 197, 198. 



— „walls", V. 24, 198. 

 Starch plate method, III. 76, 92. 

 Starter (Zuursel, Zuurwekkers), IV. 55; 



V. 101. 

 Stelar theory, I. 395. 

 Stem, leafy, phylogenetic theories, II. 



107-111. 

 Stereoplasm, I. 393. 

 Stimulant substances, originating from 



glucosides in dying plant tissue, IV. 12. 

 Stomach sarcina: see Sarcina ventriculi. 

 Stomata, excretion of oxygen, IV. 131- 



132. 

 Stout, Guinness, IV. 56. 

 Strains: of bacteria, origin of natural, 



V. 38. 



— of microorganisms, V. 36. 

 Strawberry, dissemination by slugs, I. 



319-320. 

 Streak culture, VI. 58. 

 Suberified cell walls, V. 24. 

 Suberine, IV. 252. 

 Submutants, V. 63-65-70, 84, 85, 88*, 



see also: Subvariants. 

 Subvariants, IV. 39, 41, 42, 46, 52, 338- 



340, see also: Submutants. 

 Succinates, dissimilation, II. 264; III. 



13, 14; IV. 113, 121, 299; VI. 4, 21. 

 Succinic acid, formation by yeast, III. 2. 

 Suction, V. 15. 

 Sugar: fermentability by yeast, III. 12- 



16-17. 131-133-135, 147-149; V. 234, 



260. 



— manufacture, difficulties caused by 

 Lactococcus dextranicus, V. 238. 



Sugar beet, V. 15. 



Sugar cane (Suikerriet, Zuckerrohr), I. 



83; II. 290; V. 53. 

 Suikerriet: see Sugar cane. 

 Sulphate reduction: III. 102-107-114- 



127, 315; IV. 24-36, 53, 197-202, 210. 



— biological significance, IV. 25. 



Sulphate reduction: by pure cultures, 

 IV. 201. 



— in canal water, III. 111-117; IV. 24- 

 36. 53. 199. 



— in sea water, III. 102, 116, 127; IV. 

 199. 



— indirect by protein decomposition, 

 III. 104-106; IV. 24, 29, 33-36, 198. 

 199. 203. 204. 



— products formed in. III. 110, 115. 



— quantitative determination, III. 108- 



III. 114-116. 



— relation to oxygen. III. 118. 120-122. 



— theory. III. 107. 



Sulphate Spirillae: III. 102, 127, 314, 

 319, 320; IV. 24-26, 199-202, 210. 



— enrichment culture, IV. 200, 201. 

 Sulphide bacteria, III. 1 12-123*-125; IV. 



24-26. 

 Sulphides: see also: Sulphuretted hydro- 

 gen. 



— detection in the bacterial cell, IV. 35, 

 36. 



— (FeS) occurrence, III. 102, 103; IV. 

 243. 



Sulphite: (sodium) free oxygen in solu- 

 tionsof, IV. 194. 



— reduction, III. 105, 106; IV. 24, 35, 



202, 203, 210. 



— reduction, by yeast. III. 105. 106; 



IV. 24. 35. 203. 



— reduction. influence of nitrates and 

 nitrites. IV. 201. 202. 



Sulpher: compounds, aerobic enrichment 

 cultures in the dark, IV. 26-36, 204, 

 206. 207. 243. 244. 



— cycle in nature, III. 104-106; IV. 24, 

 25, 35, 36, 202, 208, 247. 



— flora and fauna, III. 102; IV. 192- 

 211, 243, 244; V. 136, 283. 



— or sulphur compounds, oxidation as 

 an energy source for chemosynthesis, 

 IV. 202, 205-211. 242-248, 379; V. 

 135-137, 139, 231, 281-288. 



— or sulphur compounds, oxidation as 

 an energy sourse for chemosynthetic 

 denitrification, IV. 207-211, 242,245- 

 248; V. 281-288. 



— or sulphur compounds. reduction by 

 Aerobacter, IV. 24. 29, 33-36, 198, 



203, 204, 210. 



— probable con verslons in the soil, III. 

 103. 



— reduction in denitrification cultures, 

 IV. 208, 247; V. 283. 



