• Apparao, A. (1956). The role of pH in nitrogen utilization by Piricularia oryzae. Experientia, 12, 215.
  • Archibald, R. M. (1943). The quantitative microdetermination of ammonia in the presence of glutamine and other labile substances. J. Biol. Chein., 151, 141.
  • Becking, J. H. (1956). On the mechanism of ammonium ion uptake by maize roots. Acta Bot. Neerl, 5, 1.
  • Budd, K. (1960). Studies on the nitrogen metabolism of fungi, with special reference to the initial stages of ammonia uptake. D.Phil. Thesis, University of Oxford.
  • Clark, W. M. & Lubs, H. A. (1916). Hydrogen electrode potentials of phthalate, phosphate and borate buffer mixtures. J. Biol. Chem., 25, 479.
  • Cocking, E. C. & Yemm, E. W. (1961). Synthesis of amino acids and proteins in barley seedlings. New Phytol., 60, 103.
  • Conway, E. J. (1950). Microdiffusion Analysis and Volumetric Error. Crosby, Lockwood & Co., London .
  • Conway, E. J. & Malley, E. (1942). Microdiffusion methods. Ammonia and urea using buffered absorbents (revised methods for ranges greater than 10 μg N). Biochem. J., 36, 655.
  • Cowie, D. B. & Roberts, R. B. (1955). Permeability of microorganisms to inorganic ions, amino acids and, peptides. In Shanes (ed.), Electrolytes in Biological Systems, p. 1. American Physiological Society, Washington .
  • Elliott, W. H. (1951). Studies on the enzymic synthesis of glutamine. Biochem. J., 49, 106.
  • Fincham, J. R. S. (1951). The occurrence of glutamic dehydrogenase in Neurospora, and its apparent absence in certain mutant strains. J. Gen. Microbiol., 5, 793.
  • Gale, E. F. (1954). The accumulation of amino acids within staphylococcal cells. Symp. Soc. Exp. Biol., 8, 243.
  • Harley, J. L. (1934). Some critical experiments upon culture methods used for fungi. New Phytol., 33, 372.
  • MaCmillan, A. (1956a). The entry of ammonia into fungal cells. J. Exp. Bot., 7, 113.
  • MaCmillan, A. (1956b). The entry of nitrate into fungal cells. Physiologia Plantarum, 9, 470.
  • MaCmillan, A. (1956c). The relation between nitrogen assimilation and respiration in Scopulariopsis brevicaulis. Physiologia Plantarum, 9, 533.
  • Morton, A. G. & MaCmillan, A. (1954). The assimilation of nitrogen from ammonium salts and nitrate by fungi. J. Exp. Bot., 5, 232.
  • Naguib, K. & Saddik, K. (1961). The use of ammonia source of nitrogen in the metabolism of Aspergillus nidulans Eidam. Can. J. Bot., 39, 955.
  • Parnas, J. K. & Heller, J. (1924). Über den Ammoniakgehalt und über die Ammoniakbildung im Blute. Biochem. Zeitschrift, 152, 1.
  • Pucher, G. W., Vickery, H. B. & Leavenworth, C. S. (1935). The determination of ammonia and of amide nitrogen in plant tissue. Ind. Eng. Chem. (Anal. Edn.), 7, 152.
  • Rautanen, N. (1948). On the formation of amino-acids and amides in green plants. Acta Chem. Scand., 2, 127.
  • Rippel, K. (1931). Quantitative Untersuchungen über die Abhangigkeit der Stickstoffassimilation von den Wasserstoffionenkonzentration bei einigen Pilzen. Arch. Mikrobiol., 2, 72.
  • Roine, P. (1947). On the formation of primary amino-acids in the protein synthesis in yeast. Ann. Acad. Scient. Fennicae, Ser. All Chemica, 26, 1.
  • Webster, G. C. (1961). Protein Synthesis. Ann. Rev. PL Physiol., 12, 113.
  • Yemm, E. W. & Cocking, E. C. (1955). The determination of amino acids with ninhydrin. Analyst, 80, 209.
  • Yemm, E. W. & Folkes, B. F. (1954). The regulation of respiration during the assimilation of nitrogen in Torulopsis utilis. Biochem. J., 57, 495.