摘要:

The Haworth methylation technique has been modified to provide improved methods of synthesis of 2,3-dimethyl-α- and β-methyl glucosides and 2,3,4,6-tetramethyl glucose from glucose, and of 2,3,4-trimethyl methyl glucosides from levoglucosan. A new crystalline derivative of 2,3-dimethyl glucose, the gluconophenylhydrazide, has been prepared and found to serve as a valuable identification medium.

ISSN:1923-4287    

DOI:10.1139/cjr42b-025

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

Some contradictory points recorded for the alkaline hydrolysis of nitriles have been clarified by a study of propionitrile hydrolysis in aqueous sodium hydroxide solutions of concentration 0.3 to 4N. It has been shown that the rate of alkaline hydrolysis of propionitrile is given by the rate of formation of total ammonia and intermediate amide and not by that of ammonia alone. The relative rates of propionitrile and propionamide hydrolysis were found to be approximately 1:10 over the whole alkali concentration range. The bimolecular velocity constant is essentially independent of alkali concentration. An activation energy of 20,300 cal. was determined for the reaction in 0.65Nalkali.

ISSN:1923-4287    

DOI:10.1139/cjr42b-026

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

The cholinesterase activity of horse serum is strongly inhibited by phenothiazone and by some phenothiazine alkyl-sulphonium salts. The magnitude of this inhibition is about equal to that produced by methylene blue and by acriflavine. Alkaline phosphatase and serum lipase are not affected.The possible relation of this property of phenothiazine derivatives to certain nervous symptoms observed in treated pigs, and to insecticidal and anthelmintic action, is discussed.

ISSN:1923-4287    

DOI:10.1139/cjr42b-027

出版商:NRC Research Press    

年代:1942

数据来源: NRC