摘要:

The heat capacity of aqueous solutions of hydrofluoric acid varying in concentration from 0.55 to 48% was determined over the temperature range 18° to 20 °C. The respective values for the specific heat varied between 0.996 and 0.718 cal. per gm. The values obtained are consistent among themselves but differ markedly from those found in the literature. The apparent molal heat capacity of the solute over this range of concentration and temperature was calculated and compared with values obtained from the data of other experimenters.

ISSN:1923-4287    

DOI:10.1139/cjr46b-008

出版商:NRC Research Press    

年代:1946

数据来源: NRC

摘要:

Nine alkaloids have been isolated fromLycopodium lucidulumMichx. Three of these, nicotine, lycopodine, and alkaloid L13, have been previously described. The remaining six are alkaloid L20 (C17H27O2N), alkaloid L21 (C13H21ON), alkaloid L22 (G16H27ON), alkaloid L23 (C16H25O2N), alkaloid L24 (C16H25ON), and alkaloid L25 (C16H25O2N). These alkaloids represent but a small quantity of the total bases in the plant, the larger proportion of which it has not been possible to purify.

ISSN:1923-4287    

DOI:10.1139/cjr46b-009

出版商:NRC Research Press    

年代:1946

数据来源: NRC

摘要:

A total of four alkaloids have been isolated fromLycopodium sabinaefoliumWilld. Three of these have already been found to occur together in other species, while the fourth, alkaloid L26 (C15H25ON), appears to be new.

ISSN:1923-4287    

DOI:10.1139/cjr46b-010

出版商:NRC Research Press    

年代:1946

数据来源: NRC

摘要:

Only protopine andd-stylopine have been isolated in amount sufficient for identification fromCorydalis cornuta. Though closely related taxonomically toC.sibiricaandC.ochotensisonly the presence of acetyl-ornithine confirms this similarity. It is suggested thatC.ochotensisis a polyploid form ofC.cornuta.

ISSN:1923-4287    

DOI:10.1139/cjr46b-011

出版商:NRC Research Press    

年代:1946

数据来源: NRC