Rickettsial hemolysis: adsorption, desorption, readsorption, and hemagglutination

Rickettsial hemolysis: adsorption of rickettsiae to erythrocytes.

The hemolysis of sheep red blood cells by Rickettsia prowazeki has been characterized. A requirement for the adsorption of the rickettsia to the erythrocyte was indicated. No indication of the production of a soluble hemolysin was observed. Neither adsorption nor hemolysis can proceed at 0 C. The hemolytic process is rapid with a half-time of less than 30 min, and both the rate and extent are p...

Bacterial hemagglutination and hemolysis.

Inhibitory and restorative effects of adenine nucleotides on rickettsial adsorption and hemolysis.

The adenine nucleotides, adenosine diphosphate, adenosine triphosphate, (ATP), and the methylene-bridge analogues are inhibitors of rickettsial adsorption to and the hemolysis of sheep erythrocytes. Other nucleotides, adenosine monophosphate, cyclic adenosine monophosphate, cytosine triphosphate, and guanosine triphosphate, are without effect. Adsorption and hemolysis require the generation of ...

Pulsed-laser induced desorption and subsequent readsorption in ambient gas

We have investigated the phenomenon of readsorption after pulsed-laser induced thermal desorption during the presence of ambient gas. The temporal evolution of the readsorption of water has been measured as a function of the ambient gas pressure for helium and carbon-dioxide atmospheres. CO2 pressures above 10 mbar lead to a virtually complete readsorption of the de&orbed material. 4 model base...

Adsorption and Desorption of Paraquat

The adsorption and desorption of paraquat (1, l'-dimethyl-4,4'-dipyridylium dichloride) in two tropical soils was determined under laboratory conditions. The two soils were taken from rice fields located in the North West of Perak state. The adsorption equilibrium time was 2 hours for both soil types. This adsorption equilibrium time was used to determine the effect of concentration on adsorpti...