This paper considers a mixture of sedimenting particles at low Reynolds numbers and volume fractions. Simple theoretical arguments have long suggested that for a random suspension of particles in an infinite system, the fluctuations in the velocity about the mean should diverge with system size. On the other hand, experiments have shown no such divergence. The primary goal of this paper is to e...

In their article entitled: “The decrease in erythrocyte sedimentation rate related to general anesthesia”, Clin Hemorheol Microcirc 35 (2006) 459–462, Caglayan and co-workers have investigated the effects of general anesthetic agents on erythrocyte properties, reflected in changes in the Erythrocyte Sedimentation Rate (ESR). In their introduction the authors referred to the one-hour ESR method ...

Acetyl-CoA carboxylase from yeast was isolated in homogeneous form and compared in its properties with pyruvate carboxylase from yeast. Both enzymes have very similar sedimentation coefficients and molecular weights. Both enzymes are composed of four protomers. Acetyl-CoA carboxylase and pyruvate carboxylase split under identical conditions into a variety of aggregates; besides the protomer, di...

Some physicochemical properties of two thermostable proteases from Streptomyces rectus are described. The enzymes were judged to be identical with respect to molecular weight, inactivation with serine protease inhibitors, and in primary structure by peptide analysis. Amino acid analysis indicated the enzymes had identical compositions except for their amide content. The molecular weights of the...

Many contaminants of interest in water and wastewater are particles, or are made into particles for removal. Typical municipal wastewater treatment plants include both primary and secondary sedimentation, and those with tertiary treatment likely have granular media filtration. Typical drinking water plants using surface water supplies have flocculation, gravity separation (sedimentation or flot...

The inactivation of lysozyme and ribonuclease by anhydrous formic acid has been shown by Josefsson and Edman (1, 2) to be reversed by adjustment of an aqueous solution of the inactivated enzyme to pH 6.0 to 8.5. Reactivation was accompanied by an uptake of base, approximately equivalent to the number of serine and threonine residues in the proteins. With both proteins an increase in the positiv...