摘要:

A volatile base, identified as 3-methoxy-pyridine, has been isolated fromThermopsis rhombifolia(Nutt.) Richards and fromEquisetum arvenseL.

ISSN:1923-4287    

DOI:10.1139/cjr42b-037

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

A group of compounds consisting of thion-thiazolidines, thion-oxazolidines, and a thion-thiazoline were found to be tasteless to some persons and very bitter to others. The three oxo-thiazolines that were examined did not exhibit this difference, being tasteless to all the subjects. A number of these compounds have been prepared for the first time, and their synthesis is described.Taste tests were conducted on other sulphur compounds and it is concluded that the "dual taste reaction" accompanies thegrouping.

ISSN:1923-4287    

DOI:10.1139/cjr42b-038

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

Some fruits and vegetables grown in Alberta were investigated as sources of Vitamin C, and the loss occasioned by cooking was determined. Losses due to oxidation during cooking were compared with those due to extraction by the cooking water. Both cause considerable loss of vitamin C from the vegetable pulp; it would therefore be more economical always to use the juice from the vegetables. The vitamin C content of potatoes varies with the season, the peak being reached in September and just before the first frost occurs, and being followed by a steady decrease during storage.

ISSN:1923-4287    

DOI:10.1139/cjr42b-039

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

The inhibition of liver catalase and of cytochrome oxidase by leucophenothiazone has been confirmed by manometric methods. Phenothiazine sulphoxide is a powerful catalase inhibitor, its activity being much greater at pH 5.3 than at neutrality.The succinoxidase activity of beef heart is inhibited by phenothiazone and by thionol. Phenothiazone in its oxidized form acts upon the succinic dehydrogenase, while the leuco form inhibits the cytochrome oxidase.Phenothiazone is reduced by the yeast lactic dehydrogenase system, and the enzyme activity is markedly decreased. Urease is also partially inhibited, whereas the effect of phenothiazone upond-amino-acid oxidase is almost negligible.The possible relationship of these findings to the action of phenothiazine upon living organisms is discussed.

ISSN:1923-4287    

DOI:10.1139/cjr42b-040

出版商:NRC Research Press    

年代:1942

数据来源: NRC