Two-dimensional impedance studies of BSA buoyant density separated human erythrocytes

Buoyant density constancy of Schizosaccharomyces pombe cells.

Buoyant densities of cells from exponentially growing cultures of the fission yeast Schizosaccharomyces pombe 972h- with division rates from 0.14 to 0.5 per h were determined by equilibrium centrifugation in Percoll gradients. Buoyant densities were independent of growth rate, with an average value (+/- standard error) of 1.0945 (+/- 0.00037) g/ml. When cells from these cultures were separated ...

The quantitation of platelet-associated IgG on cohorts of platelets separated from healthy individuals by buoyant density centrifugation.

Evidence suggests that as platelets age in the circulation they become progressively smaller and less dense through the loss of protein. The smallest, least dense platelets have a significantly shortened survival, but the mechanism of clearance of these platelets is not known. To evaluate whether the binding of IgG could play a role in the clearance of senescent platelets, we measured platelet ...

Buoyant density and morphology of rubella hemagglutinin.

Rubella virions demonstrated by negative-contrast electron microscopy have recently been reported to range from 500 to 750 A in diameter and to have amorphous pleomorphic envelopes (J. M. Best et al., Lancet 2:237, 1967). Consonant with these observations, sedimentation studies have indicated a diameter of 850 A and ultrafiltration experiments, 900 A (B. Russell et al., J. Gen. Virol. 1:305, 19...

A separated linear shape and texture space for modeling two-dimensional images of human faces

Human faces di er in shape and texture. This paper describes a representation of grey-level images of human faces based on an automated separation of two-dimensional shape and texture. The separations were done using the point correspondence between the di erent images, which was established through algorithms known from optical ow computation. A linear description of the separated texture and ...

Numerical Investigation of the Structure of Density Currents in a two Dimensional Channel