500 



INDEX 



Tyrosinase, 52, 38G 



— copper in, 41 

 Tyrosine, 111 



— absence from mould proteins, 51 



— degradation of, 229, 231, 232, 233, 



386 389 



— in antigens, 399, 400, 401, 405, 414 

 Tyrosol, 231 



Tyrothricin, 165, 182 



Uleron, 134 

 Uracil, 333 



— as growth factor. 111 

 Urea, as energy source, 189, 211 



— effect on sulphonamide activity, 145 

 Urease, crystalline, 41 



— inhibition of, 49 



— in 3Iicrococcus lysodeiJdicus, 93 

 Uridylic acid, 333 



Urocanic acid, 230 



?i-Valeric acid, from proline, 237 



rf- Valine as energy source, 218 



Varianose, 352 



Verticillium albo-atrum, 305 



F-factor, 86 



Vibrio agar-liquefaciens, 325 



— amylocella, 325 



— comma, carbohydrates of, 353, 362, 



364 



co-enzyme in, 107 



vitamins in, 115 



Vinegar fermentation, 322 



Violacein, 388, 389 



• — as antibiotic, 185 



Viridin, 185 



Virus, metabolism, 81 



— of tobacco mosaic, 330 et seq. 

 Vitamin-A, absence from bacteria and 



yeasts, 65 

 Vitamin -B in bacteria, 65, 100 

 A'^itamin-C, absence from bacteria and 



yeasts, 65 



— production by fungi, 65 

 "\'itamin-D, absence from bacteria and 



yeasts, 65 



— from ergosterol, 63, 377 

 Vitamin-H, identity with biotin, 104 

 Vitamins, bacterial, 98, 245 

 Vogcs-Proskauer reaction, 252 

 Volutin, staining of, 56 



Warburg's yellow enzyme, crystalline, 



41 



constitution, 42 



riboflavin-5-phosphoric acid 



in, 42 

 Wassermann reaction, 403 * 

 Water content of bacteria, fungi, 



yeasts and spores, 58 



— dissociation, 5 



— hydrogen ions in, 6 



— hydroxyl ions in, 6 

 Waxes, 371 



— of acid-fast bacteria, 373, 374 



— of C. diphtheric^, 377 



— of micro-organisms, 63 



X-factor, 86 



Xanthine oxidase as bacteriostatic 



agent, 169 

 Xanthophylls, 385 

 Xanthopterin, 113 

 Xylonic acid, 293 



Yeasts, amino-acid degradation h\, 234 



— carbohydrate content of, 61 

 — - fatty acids in, 371 



— - fermentation of galactose by, 89, 96 



— gums, 345 



— fixation of nitrogen by, 215 



— juice, 38 



— — in fermentation, 263 

 zymase in, 53 



— nucleic acids of, 332, 337 



— nucleoproteins of, 60 



— phosphatide content, 64 



— proteins in, 338 



— sterol content, 63 



— Torula, pigments of, 64 



— w^ater content of, 58 

 Yellow enzyme (Warburg's), 169 



as hydrogen carrier, 206 



constitution, 42 



crj'stalline, 41 



Zeaxanthin, 390 

 Zephiran, lytic action, 177 

 Zinc chloriodide, 56 

 Zone phenomenon, 251 

 Zvmasc, 53, 268 

 Zymin, 263, 280, 435 

 Zymohexase, 212, 275, 320 

 Zymosan, 436 



