Acid 



148 



Acid: oxidation by yeast, III. 269. 



— production by Granulobacter, see : Bu- 

 tyric acid fermentation. 



— production by lactic acid bacteria, 

 significance, II. 217, 357; III. 13; IV. 

 63-65, 283, 284. 



— production in lactic acid fermenta- 

 tion, quantity, II. 217, 351 ; IV. 61, 62. 

 65, 66, 67, 69, 7 1 , 72, 279, 289-297, ; 3 1 7 

 V 12, 101, 131. 



— production by microorganisms, de- 

 monstration, III. 2, 3, 186, 189-190. 

 321; V. 185; VI. 71. 



— production by microorganisms, pre- 

 cipitation of albumose, V. 52. 



— production by Saccharomyces sphaeri- 

 cus, III. 184. 



Acids: organic — in a mixture, auxano- 

 graphic demonstration, V. 16. 



— salts of organic: dissimilation by 

 microorganisms. II. 264; III. 2. 13, 32, 

 133. 248. 269. 275-277; IV. 110-113, 

 121, 143, 145, 152. 161. 165. 196. 200. 

 210. 257, 258, 297-300, 302, 354; V. 

 1-3. 9. 16-18. 153-155, 217-219, 231, 

 232, 274; VI. 4. 13. 21, 26. 



Actinomyces: melanine formation in sym- 

 biosis with tyrosine bacteria. V. 112- 

 113. 280. 



— occurrence. IV. 15. 16. 91. 92; V. 1 1 1. 

 113. 182. 190. 



— - odour of the soil. IV. 14. 



— pigment formation, IV. 13-22; V. 1 1 1 

 -113, 115. 188. 280. 



— quinone production. IV. 13-21. 22; 

 V. 9. 



— selective cultivation. IV. 15. 16; V. 

 111-113. 152. 



— systematic position. V. 157. 182. 190. 



— tyrosine decomposition. V. 112. 113. 

 188. 280. 



— ureolysis. IV. 91, 92. 97. 



— variation, IV. 15; V. 158. 

 Actinomyces annulatus: mutation, V. 27, 



88*. 



— ring formation. V. 27. 88*. 

 Actinomyces chromogenes: alkali produc- 

 tion. IV. 13. 20. 



— description. IV. 14. 17, 18. 20; V. 112. 



— diastase and trypsine, IV. 18. 

 - — nitrate reduction, IV. 18, 22. 

 Actinomyces coelicolor: see Litmus micro- 



cocci. 

 Actinomyces paulotrophns: description. V. 

 182, 189-191. 



Actinomyces tyrosinaticus: oxidation of 

 tyrosine after growth has finished, V. 

 188. 



Adaptation, I. 27, 139. 296; II. 124. 125; 

 III. 23. 265. 294; IV. 46, 47, 146, 252; 



V. 27, 83, 84, 131, 136, 199, 200, 288, 

 see also: Modification and Variation. 



Adventitious buds : see Buds, adventiti- 

 ous. 



Adventitious roots : see Roots, adventiti- 

 ous. 



Aerobacter: adaptation, IV. 146. 



— alkali production, III. 347; IV. 29, 

 146. 159. 



— diagnosis of the genus, IV. 28-30. 



— fermentation of indigo, influence of 

 glucose, III. 347. 



— fermentation of indigo, catabolic, III. 

 344-347; IV. 29-31. 



— fermentation, influence of nitrate, 



III. 347; IV. 29. 



— • fermentation, lactic acid, IV. 28, 36, 

 146. 



— glycogen, IV. 29. 31. 



— hydrogen production. III. 346; IV. 

 28. 29. 33. 34. 36. 55. 146. 159, 283. 



— nitrogen ' fixation in symbiosis with 

 Azotobacter, IV. 139, 140. 146. 



— occurrence. III. 345-347; IV. 28, 30, 

 31. 



— reduction of nitrate, IV. 29, 33, 34, 36. 



— reduction of sulphur and sulphur 

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

 199, 203, 204, 210. 



— resistance to drying, IV. 29. 



— species and variaties, IV. 28-30, 32, 

 36, 146, 159. 



— sulphur formation (irisation pheno- 

 menon), IV. 29. 



Aerobic form, (oxygenform) of Granu- 

 lobacter, III. 39, 67, 68, 71, 75*, 82*. 

 89, 123, 316; IV. 147, 164, 224, 225; 



VI. 73. 



Aerobic s-pecies oi Granulobacter, IV. 148. 



Aerotaxis, III. 84. 



Aesculine reaction on lactic acid bacteria, 



IV. 285; V. 108. 



Aethylacetate yeast, III. 175, 345, see 

 also : Saccharomyces sphaericus. 



Agar agar: as a carbon source for micro- 

 organisms, V. 6, 111, 145, 148, 185. 



— determination of albuminoids in, IV. 

 33, 34. 



— mixed with gelatin or with soluble 

 starch, III. 298; IV. 342, 343. 



