Studies from the Rockefeller Institute for Medical Research Volume 9

Studies from the Rockefeller Institute for Medical Research Volume 9

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...and water and finally a small cake of ice. The reaction product is now allowed to come to room temperature. An excess of barium hydrate is added, the pyridine removed under diminished pressure, and the hydrochloric acid removed by shaking with silver sulfate, and further treated as previously described. The barium salt of diacetone phosphoric acid is very soluble in alcohol and is not precipitated by ether or acetone. On allowing the alcoholic solution to evaporate to dryness the barium salt is obtained as a fine white powder which when dry is no longer hygroscopic. It does not reduce Fehling's solution until after hydrolysis with acid. For analysis the substance was dried to constant weight under diminished pressure at the temperature of water vapor. 0.1133 gm. of substance gave on combustion 0.1331 gm. of CO and 0.0482 gm. of H0. 0.0923 gm. of substance gave 0.0341 gm. of BaSO. 0.2770"" " "0.062S " "Mg2P20: . CuHnaHsPO, . Calculated. C 42.25, H 6.18, P 9.10. Found (calculated Ba-free). C 41.5, H 6.18, P 8.S0. The rotation in water was found: r i-ll x 100 W" 1 X4.472 248 1-2-Monoacetone Phosphoric Acid Glucoside from Diacetone Glzcose. This substance is obtained by the action of phosphorus oxychloride on diacetone glucose when the temperature of the reaction mixture is allowed to rise above +10 during the process of destroying the unutilized phosphorus oxychloride. 10 gm. of dried diacetone glucose are dissolved in 50 cc. of dry pyridine and cooled to--20. To this is added 5.4 gm. of phospfci-orus oxychloride dissolved in 20 cc. of pyridine also cooled to--20. The mixture is allowed to remain at--20 for several hours and "then.20 cc. of ice cold water are added. The temperature of the...show more

Product details

  • Paperback | 186 pages
  • 189 x 246 x 10mm | 340g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236830148
  • 9781236830142