TABLE 145.-Elevation of the boiling point of sucrose solutions above that of water at various vapor pressures -Continued Elevation, degrees centigrade, above the boiling point of water TABLE 146.-Purity factors for use with dry-lead defecation 1 (The direct polariscope reading of the solution times the factor corresponding to the Brix gives the coefficient of purity] TABLE 148.---Optical rotation and melting point of certain sugars and sugar derivatives [This table lists the melting points, optical rotations, and molecular weights of a selected group of sugars and derivatives. Unfortunately, there is no universally accepted nomenclature for the sugar derivatives, and therefore names have been selected to With only a few exceptions (where the importance of the compound makes inclusion desirable) only crystalline compounds are given. For the calculation of the molecular weights, the 1938 International Atomic Weights were used. The specific rotations are given for 1 These values are read at 20° C, except where the temperature is specified otherwise in parentheses. ? Values from reference [1] extrapolated to zero time. [1] F. P. Phelps and F. J. Bates, J. Am. Chem. Soc. 56, 1250 (1934). REFERENCES [2] P. A. Levene and W. A. Jacobs, Ber. deut, chem. Ges. 43, 3141 (1910). [3] P. A. Levene and G. M. Meyer, J. Biol. Chem. 31, 625 (1917). [4] W. C. Austin and F. L. Humoller, J. Am. Chem. Soc. 55, 2167 (1933); 56, 1153 (1934). [5] F. L. Humoller, W. F. McManus, and W. C. Austin, J. Am. Chem. Soc. 58, 2479 (1936). |