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10.1002/jps.2600511210.abs Piper methysticum Forst. (Piperaceae) has been reported by several investigators to contain alkaloids. Several screening methods utilized in this study substantiated these findings; however, after comparing a variety of test procedures, these “positive” alkaloid...
10.1002/jps.2600511212.abs Deuterium oxide was used as a solvent for procaine and the effect on the stability and local anesthetic activity was noted. The ED50 was determined by the method of Chance and Lobstein and comparison was made with aqueous procaine solutions. In water the ED50 was 1.8%...
10.1002/jps.2600511219.abs Quantitative recovery of dehydrocholic acid from the tablets can be accomplished by first extraction with chloroform and subsequent titration as given in the U.S.P. XVI. Results are reported to indicate that the residue obtained is of pure acid.
10.1002/jps.2600511216.abs The necessity for a comprehensive quality control program for tableting tools is discussed and the establishment of tool specifications and inspection facilities are described. Several experiments are presented leading to the evaluation of steels, tool shapes,...
10.1002/jps.2600511215.abs A fluorometric procedure is described for the determination of methandrostenolone (17α‐methyl‐17β‐hydroxyandrosta‐1,4‐dien‐3‐one). The method is based on the flluorogen formed when the steroid is heated with hydrochloric acid at 100°. In order to...
10.1002/jps.2600511213.abs Three separation techniques for various phenothiazine tranquilizers are reported in this paper. Electrophoresis with suitable buffer systems and proper voltage permitted fast and distinctive migration of these phenothiazine bases, but tailing interfered with the...
10.1002/jps.2600511211.abs The rate of the base‐catalyzed decomposition of riboflavin was investigated in aqueous solution in the absence and presence of caffeine at a number of different temperatures. It was found that at all temperatures the apparent velocity of the reaction was decreased by...
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