摘要:

Lycopodium clavatumL. of American origin has yielded nicotine, lycopodine, alkaloid L13, and two new, as yet uncharacterized alkaloids, referred to as alkaloids L18 and L19. The alkaloids, clavatine and clavatoxine, found inL.clavatumof European origin were absent and it is suggested that the two plants are specifically or varietally distinct.

ISSN:1923-4287    

DOI:10.1139/cjr44b-017

出版商:NRC Research Press    

年代:1944

数据来源: NRC

摘要:

Aerobacter aerogenes,Aerobacillus polymyxa, andAeromonas hydrophila, representatives of the three genera characterized by a butanediol fermentation, can all oxidize 2,3-butanediol under aerobic conditions. The configuration of the 2,3-butanediol has considerable bearing on its decomposability:Aerobacter aerogenesis inactive on thel-isomer, but attacks bothmeso- andd-isomers;Aeromonas hydrophilaattacks themeso-isomer but not thel- and probably not thed-isomer;Aerobacillus polymyxacan oxidize bothl- andmeso-2,3-butanediol, but the rate with the former is many times greater than with the latter.Aerobacter aerogenesoxidizes both 2,3-butanediol and acetoin to carbon dioxide and water, a large part of the substrate being simultaneously assimilated. The other two organisms oxidize 2,3-butanediol to acetoin, but can further oxidize the acetoin thus formed only very slowly, if at all. BothAerobacter aerogenesandAerobacillus polymyxaare unable to attack 1,3-butanediol, 2-methyl-1,2-propanediol and 1,2-ethancdiol. However they can oxidize 1,2-propanediol to acetol.

ISSN:1923-4287    

DOI:10.1139/cjr44b-018

出版商:NRC Research Press    

年代:1944

数据来源: NRC