d-tubocurarine chloride: effect on insects

Injection of d-tubocurarine chloride into certain insects produces complete flaccid paralysis. The site of injection is closely related to the region of primary paralysis. The effect depends on concentration, with distinct differences in the optimum concentrations for various species so far tested. A dose-response curve has been prepared for Calliphora erythrocephala.

Some physical and growth characteristics of a canine adenovirus isolated from dogs with laryngotracheitis

The canine adenovirus causing laryngotracheitis s was shown to exhibit a cytopathic effect, growth response, hemagglutinin synthesis, and complement-fixing antigen synthesis characteristic of adenoviruses in general. Infectious virus was not synthesized until at least 16 hours after infection. The release of the virus was prolonged for a considerable time after infection as was the hemagglutinin and complement-fixing antigen. The virus was elutetl from DEAE- and TEAE-cellulose columns with about 0.2–0.3 M NaCl at pH 7.3. Thermal inactivation of infectivity was similar to that of other adenoviruses, with almost complete inactivation in 40 minutes. Of the animal cells tested, only the canine primary cells and a continuous canine cell line were found to propagate the virus.