Mutation 



182 



Mutation: significance of the study of 



asexual organisms, V. 28, 29, 30, 40, 64, 



73-75, 84, 214, 254. 

 Mycobacterium, systematic position, V. 



157, 182. 

 Mycoderma, see : Saccharomyces mycoder- 



ma, S. sphaericus, S. orientalis. 

 Mycogone, isolation from garden soil, V. 



146, 147. 



Mycorrhiza, II. 69; IV. 16, 262-265. 

 Myrosine, III. 327, 328; IV. 7, 9, 12. 



N 



Narren, I. 15. 



Natural selection, I. 157, 411; II. 49, 98, 

 100, 101. 



Natural system, II. 94; IV. 39, 73-75, 

 79; V. 29. 



Necrobiosis, III. 258-266-270, 284-286, 

 289-291, 335; IV. 11, 12, 89, 99, 102, 

 227, 271-273, 308, 309, 319; V. 169- 

 177, 205-207, 215, 220-227, 251, 252, 

 279. 



- concept, V. 205, 206. 

 Necrobiotic: enzyme action, prevention 



in herbarium, IV. 12. 



- fermentation, V. 207, 215, 220-227, 

 251. 



- line in partly killed leaves, III. 335; 

 IV. 11, 12, 308, 309*. 



- processes of yeast, III. 258, 266-270, 

 285, 286, 289-291; IV. 319; V. 207, 

 215, 220-227, 251. 



- production of aromatic substances, 

 IV. 12. 



- proteolysis, III. 258, 266-269-270, 

 284-286, 289-291 ; IV. 319. 



- reaction to detect the origin of a leaf 

 of Cytisus Adami, C. purpureum or C. 

 laburnum, IV. 308, 309*. 



- reaction to detect enzymes and glu- 

 cosides in plants, III. 335; IV. 11, 12. 



- substances as the cause of gummosis 

 of the Amygdaleae, IV. 271-273; V. 

 169-177, see also: Traumatic excita- 

 tion and : Coryneum B eij erinckii . 



Nematode disease: of Gardenia roots, II. 

 139-140*-143*. 



- of Onions, I. 283-291. 



Nematode, catch plant for the collection 



of , I. 290. 



Nephrozymase, II. 278; III. 270. 

 Nettle (Brandnetel, Brennnessel), I. 24; 



IV. 235. 



Newton rings, II. 168, 181; IV. 84, 102; 



V. 247, see also: Irisation. 

 Nitragine, IV. 260. 



Nitrate : assimilation by microorganisms, 

 II. 250, 296-298, 316; III. 7, 1 1, 18-20, 

 22, 31, 184, 276, 277; IV. 73, 117, 279, 

 353, 354; V. 5, 16, 273; VI. 11, 61, 62. 



- antifermenting action, III. 347; IV. 29. 



- concentration, influence on the enrich- 

 ment culture of denitrifying bacteria, 

 IV. 356, 357, 367. 



- no reduction by yeast, III. 99. 



- reduction to ammonia, IV. 148, 177, 

 192, 195. 



- reduction to nitrite, II. 151; III. 18, 

 19, 117; IV. 18, 22, 29, 33, 34, 36; 



VI. 13. 



- reduction to nitrogen, see: Denitri- 

 fication. 



- reduction to nitrous oxide, II. 151; 



IV. 348, 352-354-356-370, 382. 

 Nitrate bacteria (nitric bacteria) : descrip- 

 tion, IV. 261, 265*; V. 181, 183, 185, 

 186, 189, 193*; VI. 71. 



- films, V. 179, 181, 183. 



- modifications, oligotrophic and poly- 

 trophic, V. 178, 179, 187-193, 210. 



pure culture, IV. 108, 109, 128, 183; 



V. 179, 181, 183, 185; VI. 71. 



- systematic position, V. 143, 187. 

 Nitrification: II. 183, 324; III. 113, 168, 



238; IV. 174, 178, 180, 182, 205, 206, 

 256*, 257, 260, 261, 262, 379; V. 133, 

 141, 178-193; VI. 71. 



- elimination of denitrifcation in crude 

 nitrification by aeration, IV. 262. 



- determination of the quantity of ni- 

 trate and nitrite, IV. 174. 



- influence of acid, V. 183. 



- in the soil, IV. 261; V. 179. 



- nitratation, V. 178-193; VI. 71. 



- nitratation, and growth, separate 

 processes, no chemosynthesis, V. 179, 

 185, 188, 191. 



- nitratation, crude, symbiotic flora, V. 

 181, 182, 183, 190. 



- nitratation, energy produced by nitrite 

 oxidation, IV. 379; V. 191. 



- nitratation, influence of hu mates, V. 

 180. 



- nitratation, influence of organic 

 substances, III. 238; IV. 261, 262; V. 

 179, 181, 187, 188-193; VI. 71. 



- nitritation, III. 113, 190; V. 183, 184, 

 185; VI. 71. 



