Synthesis of triterpene glycosides
Summary1. The acyl-β-D-glucopyranosides, acyl-β-D-xylopyranosides, and acyl-α-L-arabinopyranosides of oleanolic and ursolic acids have been synthesized for the first time.2. A method for the synthesis of acyl glycosides of triterpene hydroxyacids with hindered carboxy groups has been developed.
Über die Herstellung von Acetylglycyrrhetinsäure und deren Curtius‐Abbau
Es wird die Acetolyse von Glycyrrhizinsaure zur Acetylglycyrrhetinsaure sowie deren Curtius-Abbau zum 3β-Acetoxy-11-oxo-20β-amino-noroleanen-(12) be schrieben.
Pasteurella haemolytica serotype 1 colonization of the nasal passages of virus-infected calves.
Nasal passages of calves with a virus-induced respiratory tract disease became colonized by Pasteurella haemolytica serotype 1 after they were inoculated intranasally with P haemolytica. Inoculation with infectious bovine rhinotracheitis virus caused a more severe clinical illness and resulted in a greater degree of colonization with P haemolytica than developed after inoculation with parainfluenza-3 virus. Nasal passages of parainfluenza-3 virus-inoculated calves were colonized to a greater degree with P haemolytica than were those of healthy, nonstressed calves. Calves were susceptible to P haemolytica colonization during or shortly after virus-induced illness, even though they had been previously exposed to P haemolytica and had serum antibody and nasal secretion antibody to P haemolytica.