The B-V (continuous-flow) and B-IV (density gradient) centrifuge rotors have been evaluated in the Spinco zonal centrifuge, using polio virus, type 3 Saukett strain. The B-V rotor can sedimen t live polio virus from raw tissue culture harvest fluids with 99 percent capture efficiency at flow rates up to 2.5 liters per hour. Fractions obtained had been purified more than 30-fold and concentrated...

Crude preparations of PR8 influenza virus, obtained by high-speed centrifugation, contain two electrophoretically distinct components. One of these, present to the extent of 10 to 20 per cent, was identified by electrophoresis, centrifuge, and activity tests, as an impurity similar to or identical with a high molecular weight acidic substance shown by Knight to be elaborated by normal uninfecte...

A Cytospin slide centrifuge was used to concentrate 0.05- to 0.5-ml samples of cerebrospinal and other body fluids for Gram stain. Trials with cerebrospinal fluid containing known numbers of microorganisms indicated that the Cytospin increased the sensitivity of cerebrospinal fluid Gram stains by up to 2 logs compared with unconcentrated and conventional centrifuge smears. Cytospin-concentrated...

Geological isolation of nuclear waste requires laboratory and field investigations to evaluate migration parameters such as diffusion and dispersion coefficient of radionuclides in order to assess the site suitability for locating a high level radioactive waste repository. However, migration of radionuclides through the rock mass away from the radioactive waste repository is an extremely slow p...

oil uptake occurs mainly during cooling immediately after frying. post-frying centrifuge step used to remove the attached oil to the surface of friedproduct. response surface methodology (rsm) technique was used to develop models for the responses to the centrifugal force (100, 200 and 300 rpm) and centrifugal time (20, 50 and 80 s), frying temperature (140, 170 and 200 c) and frying time (4, ...

Centrifuge modelling is an effective tool to assess the response of reduced-scale structures subjected earthquakes under increased gravity. Space limitations, however, force model be contained within relatively small boxes, whose boundaries may affect seismic performance structure consideration. In this paper, influence proximity equivalent shear beam (ESB) container during dynamic centrifuge t...