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, 71, 72, 279, 289-297, ; 317 

 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. Ill, 

 113, 182, 190. 



- odour of the soil, IV. 14. 



pigment formation, IV. 13-22; V. Ill 

 -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 paulotYophus: 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- 

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

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



VI. 73. 



Aerobic species of 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. 



