269. Silver, W. S., and McElroy, W. D. Enzyme studies on nitrate and nitrite mutants. Arch. Biochem. Biophys. 51, 379-394 (1954).
269a. Silver, W. S. Pyridine nucleotide-nitrate reductase from Hansenula anomala, a nitrate reducing yeast. /. Bacteriol. 73, 241-246 (1957).
270. Simpson, J. R., and Evans, W. C. The metabolism of nitrophenols by certain bacteria. Biochem. J. 55, xxiv (1953).
271. Singh, R. N. The fixation of elementary nitrogen by some of the commonest blue-green algae from the paddy field soils of the United Provinces and Bihar.
Indian J. Agr. Sei. 12, 743-750 (1942).
271a. Skinner, F. Α., and Walker, N. Growth of Nitrosomonas europaea in batch and continuous culture. Arch. Mikrobiol. 38, 339-349 (1961).
272. Smith, V. M. On the mechanism of enzyme action. XXXIX. A comparative study of the metabolism of carbohydrates in the presence of inorganic and organic phosphates by Merulius lacrymans and Marasmius chordalis. Arch.
Biochem. 23, 446-472 (1949).
273. Snell, Ε. E. Microbiological techniques (inorganic ions). In "Trace Analysis"
(J. H. Yoe and H. J. Koch, eds.) p. 547. Wiley, New York, 1957.
274. Somers, E. Fungitoxicity of metal ions. Nature 187, 427-428 (1960).
275. Spencer, D., Takahashi, H., and Nason, A. Relationship of nitrite and hydro-xylamine reductases in nitrate assimilation and nitrogen fixation in Azotobacter agile. J. Bacteriol. 73, 553-562 (1957).
276. Spencer, B., and Harada, T. Role of choline sulphate in the sulphur metabolism of fungi. Biochem. J. 77, 305-315 (1960).
277. Stahl, W. H., McQue, B., Mandels, G. R., and Sin, R. G. H. Studies on the microbiological degradation of wool. I. Sulphur metabolism. Arch. Biochem. 20, 422-432 (1949).
278. Starkey, R. L., and Waksman, S. A. Fungi tolerant to extreme acidity and high concentrations of copper sulphate. 7. Bacteriol. 45, 509-519 (1943).
279. Starkey, R. L. Relations of micro organisms to transformation of sulphur in soil. Soil Sei. 70, 55-65 (1950).
280. Steinberg, R. A. A study of some factors in the chemical stimulation of the growth of Aspergillus niger. Am. J. Botany 6, 330-372 (1919).
281. Steinberg, R. A. Essentiality of gallium to growth and reproduction of Aspergillus niger. J. Agr. Research 57, 569-574 (1938).
3. I N O R G A N I C N U T R I E N T N U T R I T I O N O F M I C R O O R G A N I S M S 445
282. Steinberg, R. A. Growth of fungi in synthetic nutrient solutions. Botan. Rev. 5, 327-350 (1939).
283. Steinberg, R. Α., and Bowling, J. D. Optimum solutions as physiological refer-ence standards in estimating nitrogen utilization by Aspergillus niger. 7. Agr.
Research 58, 717-732 (1939).
284. Steinberg, R. A. Effects of nitrogen compounds and trace elements on growth of Aspergillus niger. J. Agr. Research 59, 731-742 (1939).
285. Steinberg, R. A. Sulfur and trace element nutrition of A. niger. J. Agr. Research 63, 109-127 (1941).
286. Steinberg, R. Α., and Thorn, C. Reversions in morphology of nitrite-induced
"mutants" of Aspergilli grown on acids. J. Agr. Research 64, 645-652 (1942).
287. Steinberg, R. A. Variants in fungi: formation, reversion and prevention.
Science 100, 10-11 (1944).
288. Steinberg, R. A. Specificity of potassium and magnesium for growth of Aspergillus niger. Am. 7. Botany 33, 210-214 (1946).
289. Stout, P. R., and Meagher, W. R. Studies of the molybdenum nutrition of plants with radioactive molybdenum. Science 108, 471-472 (1948).
290. Sussman, A. S., and Lowry, R. J. Physiology of the cell surface of Neurospora ascospores. J. Bacteriol. 70, 675-685 (1955).
291. Susuki, N., and Susuki, S. Hydroxylamine reduction and hydrazine oxidation by Azotobacter vinelandii. Sei. Repts. Tôhoku Univ. 4th Ser. 20, 195-201
(1954).
292. Swaby, R. J., and Sherber, J. Phosphate-dissolving micro-organisms in the rhizosphere of legumes. In "Nutrition of the Legumes" (E. G. Hallsworth, ed.) p. 289. Academic Press, New York, 1958.
293. Syrett, P. J. Nitrogen assimilation by green algae. Symposium Soc. Gen.
Microbiol. 4th, 126-151 (1954).
294. Takahashi, H., and Nason, A. Tungstate as a competitive inhibitor of molybdate in nitrate assimilation and in N2 fixation by Azotobacter. Biochem. et Biophys.
Acta 23, 433-435 (1957).
295. Talley, P. J., and Blank, L. M. Some factors influencing the utilization of in-organic nitrogen by the root rot fungus. Plant Physiol. 17, 52-67 (1942).
296. Taniguchi, S., Mitsui, H., Toyoda, J., Yamada, T., and Egami, F. Successive reduction from nitrate to ammonia by cell-free enzyme systems. 7. Biochem.
(Tokyo) 40, 175-186 (1953).
297. Taniguchi, S., Sato, R., and Egami, F. The enzymic mechanisms of nitrate and nitrite metabolism in bacteria. In "Inorganic Nitrogen Metabolism" (W. D.
McElroy and B. Glass, eds.) pp. 87-108. Johns Hopkins Press, Baltimore, Maryland, 1956.
298. Taniguchi, S., Asano, Α., Iida, K., Kono, M., Ohmachi, K., and Egami, F. The enzymatic electron transfer to nitrate, nitrite and hydroxylamine. In "Proceed-ings of the International Symposium on Enzyme Chemistry, Tokyo-Kyoto, 1957" (K. Ichihara, ed.) pp. 238-245. Academic Press, 1958.
299. Texera, D. A. Production of antibiotic substances by Fusaria. Phytopathology 38, 70-81 (1948).
300. Updegraff, D. M., and Wren, J. B. The release of oil from petroleum bearing materials by sulphate-reducing bacteria. Appl. Microbiol. 2, 309 (1954).
301. Vallée, B. Metal and enzyme interactions: Correlation of composition, function and structure. In "The Enzymes" (P. D. Boy er, Η. Lardy, and K. Myrbäck, eds.) 2nd ed., Vol. 3, pp. 225-276. Academic Press, New York, 1960.
302. Van der Kerk, G. J. M., and Luitjen, J. G. A. Investigations on organo-tin compounds. III. The biocidal properties of organo-tin compounds. /. Appl. Chem.
4, 314-319 (1954).
303. Verhoeven, W. Aerobic spore forming nitrate reducing bacteria. Ph.D. Thesis, University of Delft, Netherlands, 1952.
304. Verhoeven, W. Nitrate and nitrite metabolism in micro-organisms. In "Inor-ganic Nitrogen Metabolism" (W. D. McElroy and B. Glass, eds.), pp. 61-86.
Johns Hopkins Press, Baltimore, Maryland, 1956.
305. Villanueva, J. R. Purification of nitro-reductase enzyme of a Nocardia species.
Biochem. J. 72, 36 (1959).
306. Villanueva, J. R. Nitroreductase of a Nocardia species. J. Gen. Microbiol. 20, 6 (1959).
307. Virtanen, A. I., and Laine, T. Investigations on the root nodule bacteria of leguminous plants. Biochem. J. 33, 412-420 (1939).
308. Virtanen, A. I., and Csàky, T. Z. Formation of oxime nitrogen in Torula yeast fed with potassium nitrate. Nature 161, 814-815 (1948).
309. Virtanen, A. I., and Rautanen, N. Nitrogen assimilation. In "The Enzymes"
(J. B. Sumner and K. Myrbäck, eds.) 1st ed., Vol. II, Part 2, pp. 1089-1130.
Academic Press, New York, 1952.
310. Virtanen, A. I., and Saris, Ν. E. Organic hydroxylamine compounds formed from nitrite in Torulopsis utilis. Acta Chem. Scand. 9, 337-339 (1955).
311. Virtanen, A. I., and Saris, Ν. E. Organic hydroxylamine compounds formed from nitrite in Torulopsis utilis. II. Acetylhydroxamic acid. Acta. Chem. Scand.
10, 483-485 (1956).
312. Vishniac, H. S. The nutritional requirements of isolates of Labyrinthula spp.
/. Gen. Microbiol. 12, 455-63 (1955).
313. Vollenweider, R. A. Ökologische Untersuchungen von planktischen Algen auf experimenteller Grundlage. Schweiz. Z. Hydrol. 12, 194-262 (1950).
313a. Walker, J. B. Inorganic micronutrient requirements of Chlorella. 1. Require-ment for calcium (or strontium), copper and molybdenum. Arch. Biochem.
Biophys. 46, 1-10 (1953).
314. Walker, G. C., and Nicholas, D. J. D. An iron requirement for a dissimilatory nitrate reductase in Neurospora crassa. Nature 189, 141-142 (1961).
315. Walker, G. C , and Nicholas, D. J. D. Nitrite reductase from Pseudomonas aeruginosa. Biochem. J. 77, 4-5P (1960); Biochim. et Biophys. Acta 49, 350-360 (1961).
316. Warburg, O., and Negelein, E. Über die Reduktion der Salzpetersäure in grünen Zellen. Biochem. Ζ. 110, 66 (1920).
317. Warington, R. On nitrification. J. Chem. Soc. 33, 44-50 (1878).
318. Waring, W. S., and Werkman, C. H. Iron requirements of heterotrophic bacteria. Arch. Biochem. 1, 425-433 (1943); 4, 75-87 (1944).
319. Watanabe, A. Production in cultural solution of some amino acids by the atmospheric nitrogen-fixing blue-green algae. Arch. Biochem. Biophys. 34, 50 (1951).
320. Webb. M. The effect of magnesium on the growth and cell division of various bacterial species in complex media. J. Gen. Microbiol. 3, 410-417 (1949).
321. Webb, M. The influence of magnesium on cell division. The effect of mg on the growth of bacteria in chemically-defined media of varying complexity. J. Gen.
Microbiol. 5, 485-495 (1951).
322. Weillman, R. H., and McCallan, S. E. A. An analysis of factors causing
varia-3. I N O R G A N I C N U T R I E N T N U T R I T I O N O F M I C R O O R G A N I S M S 447
tion in spore germination tests of fungicides. IV. Time and temperature.
Contrits. Boyce Thompson Inst. 12, 431-450 (1942).
323. Wilson, P. W. Biological nitrogen fixation. In "Bacterial Physiology" (C. H.
Werkman and P. W. Wilson, eds.) pp. 467-494. Academic Press, New York, 1951.
324. Wilson, P. W. Asymbiotic nitrogen fixation. In "Handbuch der Pflanzen-physiologie" (Κ. Mothes, ed.) Vol. 8, pp. 9-42. Springer Verlag, Berlin, 1958.
325. Winfield, M. E. The role of boron in plant metabolism. 3. The influence of boron on certain enzyme systems. Australian J. Exptl. Biol. 23, 267-272 (1945).
326. Winogradsky, S. Recherches sur les organismes de la nitrification. Ann. inst.
Pasteur 4, 213, 257, 760 (1890).
327. Winter, G. Über die Assimilation des Luftstickstoffs durch endophytische Blaualgen. Beitr. Biol. Pflanz. 23, 295 (1935).
328. Woods, D. The reduction of nitrate to ammonia by Clostridium welchii.
Biochem. J. 32, 2000-2016 (1938).
329. Yoshii, H. Pathological studies of water melon wilt. V. Metabolism of Fusarium niveum with special reference to its gas evolution. Bui. Sei. Pak. Terkult. Kjusu Imp. Univ. Fukuoka Japan 6, 321-28 (1935).
330. Young, H. C , and Bennett, C. W. Growth of some parasitic fungi in synthetic culture media. Am. J. Botany 9, 459-469 (1922).
331. Zalokar, M. Reduction of selenite by Neurospora. Arch. Biochem. Biophys.
44, 330-337 (1953).
332. Zavarzin, G. A. The participation of molybdenum in the oxidation of nitrites by nitrifying bacteria. Doklady Akad. Nauk S.S.S.R. 113, 1301-1352 (1957).
333. ZoBell, C. E., "Marine Microbiology" Chronica Botanica, Waltham, Massa-chusetts, 1946.
334. Zucker, M., and Nason, A. Nitroaryl reductase from Neurospora crassa. In
"Methods in Enzymology" (S. P. Colowick and N. O. Kaplan, eds.) Vol. II, pp. 406-411. Academic Press, New York, 1956.