ESTIMATION 



11. H. IsbeU, J. G. Wooley and H. F. Fraser, U.S. Publ. Health Rep., 



1941, 66, 282. 



12. M. L. Scott, F. E. Randall and F. H. Hessell, /. Biol. Chem., 



1941. 141, 325. 



13. E. C. Barton-Wright, Nature, 1942, 149, 696. 



14. M. I. Wegner, A. R. Kemmerer and G. S. Fraps, /. Biol. Chem., 



1942, 144, 731. 



15. J. C. Bauernfeind, A. L. Sotier and C. S. Boruff, Ind. Eng. Chem. 



Anal. Ed., 1942, 14, 666. 



16. M. I. Wegner, A. R. Kemmerer and G. S. Fraps /. Biol. Chem., 



1942, 146, 547. 



17. F. W. Chattaway, F. C. Happold and M. Sandford, Biochem. J., 



1943, 37, 298. 



18. F. M. Strong and L. E. Carpenter, Ind. Eng, Chem., Anal. Ed., 



1942, 14, 909. 



19. E. Kodicek and A. N. Worden, Biochem. J., 1945, 39, 79. 



20. R. A. Sullivan, A. Beatty, E. Bloom and E. Reeves, Arch. Biochem., 



1943. 2, 333. 



21. S. A. Price and H. C. H. Graves, Nature, 1944, 163, 461. 



22. R. H. Silber and C. W. Mushett, /. Biol. Chem., 1942, 146, 271. 



23. S. A. Price, Nature, 1948, 161, 19. 



24. E. C. Barton- Wright, Analyst, 1945, 70, 285 ; Practical Methods 



for the Microbiological Assay of the Vitamin B Complex and 

 Essential Amino Acids, Ashe Laboratories Ltd., London. 



25. H. A. Romberg, R. S. Langdon and V. H. Cheldelin, Anal. Chem., 



1948, 20, 81. 



26. M. van Eekelen and A. Emmerie, Acta Brevia Neerland., 1935, 6, 



77 ; 1936, 6, 136. 



27. G. C. Supplee, S. Ansbacher, G. E. Flanigan and Z. M. Hanford, 



/. Dairy Sci., 1936, 19, 215. 



28. S. M. Weisberg and I. Levin, Ind. Eng. Chem., Anal. Ed., 1937, 9» 



523- 



29. A. Z. Hodson and L. C. Norris, /. Biol. Chem., 1939, 131, 621. 



30. W. S. Jones and W. Christiansen, /. Amer. Pharm. Assoc, 1941, 



30, 270. 



31. G. E. Shaw, Pharm. J., 1939, 143, 222. 



32. A. R. Kemmerer, /. Assoc. Off. Agric. Chem., 1941, 24, 413. 



33. A. E. Schumacher and G. F. Heuser, Ind. Eng. Chem., Anal. Ed., 



1940, 12, 203. 



34. K. M. Henry, J. Houston and 5. K. Kon, Biochem. J., 1940, 34, 



601. 



35. F. O. Van Duyne, /. Biol. Chem., 1941, 139, 207. 



36. A. D. Emmett, O. D. Bird, R. A. Brown, G. Peacock and J. M. 



Vandenbelt, Ind. Eng. Chem., Anal. Ed., 1941, 13, 219. 



37. S. H. Rubin, E. de Ritter, R. L. Schuman and J. C. Bauernfeind, 



ibid., 1945, 17, 136. 



38. V. A. Najjar, /. Biol. Chem., 1941, 141, 355. 



39. E. C. Barton-Wright and R. G. Booth, Biochem. J., 1943, 37, 25. 



40. M. Swaminathan, Indian J. Med. Res., 1942, 30, 37. 



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