摘要:

The products of pyrolysis of methyl and ethyl cyanides at 865° and 675 °C. respectively have been determined at each of two flow rates. From methyl cyanide were obtained hydrogen, methane, hydrogen cyanide, and carbon. Small amounts of "C2" hydrocarbons and high boiling materials were also formed. The results indicate that hydrogen cyanide is a primary product.Ethyl cyanide yielded hydrogen, methane, ethane, ethylene, hydrogen cyanide, methyl cyanide, acrylonitrile, and carbon, together with small amounts of succinonitrile and higher boiling materials. The reaction is obviously complicated by secondary changes.

ISSN:1923-4287    

DOI:10.1139/cjr42b-012

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

The Arrhenius constants have been evaluated for the hydrolysis of formamide, acetamide, propionamide, and benzamide in hydrochloric acid solutions over the concentration range 1 to 10N. There is approximate correspondence between reaction rates and activation energies for the series of amides. An increase in observed activation energy with increasing acid concentration was found for all amides. The maximum in rate of hydrolysis, which occurs at higher acid concentrations, is discussed and accounted for by the variation in the Arrhenius constants with acid concentration.

ISSN:1923-4287    

DOI:10.1139/cjr42b-013

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

The fluorimetric method for the determination of riboflavin in foodstuffs has been modified to permit the use of the fluorimeter described by Froman and McFarlane (4). Extracts are prepared by enzymatic digestion and purified by barium chloride precipitation and benzyl alcohol extraction Photochemical reduction of riboflavin in the 'blank' is effected by stannous chloride in benzyl alcohol solution.

ISSN:1923-4287    

DOI:10.1139/cjr42b-014

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

Lycopodium complanatumL. has yielded a total of eight alkaloids, six of which appear to be new. They are complanatine (L1) (C18H31ON); alkaloid L2 (C18H29O2N); alkaloid L3 (C18H31O2N); alkaloid L4 (C16H27N); alkaloid L5 (C18H28O2N2); obscurine (L6) (C18H28ON2); the known lycopodine (C16H25ON); and nicotine. It is pointed out that this is the first recorded occurrence of nicotine in a pteridophyte. The isolation of nicotine fromEquisetum arvenseL. is also recorded.

ISSN:1923-4287    

DOI:10.1139/cjr42b-015

出版商:NRC Research Press    

年代:1942

数据来源: NRC