One way of improving the resolution of particles by size is to minimize the difference in RCF between the top and bottom of the sample. Practically this is achieved by layering the sample as a narrow band over a continuous density gradient. This is called rate-zonal gradient (sedimentation velocity) centrifugation; the conditions are chosen such that ρρ always remains greater than ρl. In a cont...

abstract: impeller trimming is a proper way to alter the performance of centrifugal pump with a constant speed so as to meet the demand on the specified flow rate and head in pumping systems. the affinity law accounting for the impeller trimming is the key relation to determine the pump performance with a trimmed impeller. there seems no experimental study dealing with such an affinity law for ...

The compositions of the various organic and inorganic species in cane molasses show wide variations. Centrifugation can be used to remove suspended so!id particles. The bulk of these are precipitated calcium compounds. Removal of calcium by precipitation and subsequent centrifugation can be enhanced by the addition of sulphuric acid. The effects of dilution, temperature, and acid addition on th...

This study presents a method for fabrication of ultrafine polymeric nanofibers as well as nano/micro particles utilizing centrifugal and electrostatic forces simultaneously. To reduce the diameter and variety of nanofibers produced from solid state polymerized PA66, a unique electrocentrifuge spinning device was utilized with a rotating nozzle and collector, while the fabrication process (spinn...

coccus suspension with immune serum at 1,800 r.p.m. for 10 minutes, and obtained very encouraging results. Mayer and Dowling (1945) used a centrifugal method for the detection of agglutinins against meningococci and obtained highly specific results. Feldman (1946) used a similar method in the identification of cultures, specially those of the dysentery group. The present paper gives the results...

Fluorescence polarization was measured on amniotic fluids of different gestational ages before and after centrifugation at relative centrifugal forces of 34 to 4955 x g. Centrifugation significantly increased the fluorescence polarization values over those of uncentrifuged amniotic fluids. The greatest increase was observed in the most "mature" fluids centrifuged at 34 to 230 x g. Almost withou...

Abstract. Centrifugal pendulum absorbers are passive dampers mainly employed nowadays to attenuate torsional vibrations in modern drivetrains reduce fuel consumption and CO2 emissions. The absorber is linked the drivetrain by means of a higher kinematic joint composed slots rollers, termed caged-roller joint. This work aims investigate contact between rollers through multibody dynamics simulati...

In connection with the significant complication of research objects technological systems and considerable increase in expenses for carrying out experimental research, improving mathematical modeling methods these is a current problem. By using means optimization, calculation main parameters formation method film hydrogel products based on silver-filled copolymers 2-hydroxyethylmethacrylate pol...