The separate contributions to cosmology of the above researchers are revisited and a cosmology encompassing their basic ideas is proposed. We study Dirac’s article on the large number hypothesis (Proc.Roy.Soc. Lon. A 165,199; 1938), Sciama’s proposal of realizing Mach’s principle (MNRAS 113, 34; 1953), and Robert Dicke’s considerations on an ‘electromagnetic’ theory of gravitation with a variab...

Particle concentration is a key unit operation in biochemical assays. Although there are many techniques for particle concentration in continuous-phase microfluidics, relatively few are available in multiphase (plug-based) microfluidics. Existing approaches generally require external electric or magnetic fields together with charged or magnetized particles. This paper reports a passive techniqu...

The density of a single cell is a fundamental property of cells. Cells in the same cycle phase have similar volume, but the differences in their mass and density could elucidate each cell's physiological state. Here we report a novel technique to rapidly measure the density and mass of a single cell using an optically induced electrokinetics (OEK) microfluidic platform. Presently, single cellul...

We present the validation of a recent fractional mathematical model for erythrocyte sedimentation proposed by Sharma et al. \cite{GMR}. The model uses a Caputo fractional derivative to build a time fractional diffusion equation suitable to predict blood sedimentation rates. This validation was carried out by means of erythrocyte sedimentation tests in laboratory. Data on sedimentation rates (pe...

Natural montmorillonite was modified with a quaternary ammonium compound, hexadecyltrimethylammonium (HDTMA). The sedimentation capabilities of unmodified and modified montmorillonites were then investigated. The sedimentation velocity of modified montmorillonites increased if the amounts of adsorbed HDTMA were from 0.3 to 1.0 times the cation exchange capacitity (CEC). It also emerged that the...

The effects of solvent compressibility on the sedimentation behavior of macromolecules as observed in analytical ultracentrifugation are examined. Expressions for the density and pressure distributions in the solution column are derived and combined with the finite element solution of the Lamm equation in inhomogeneous media to predict the macromolecular concentration distributions under differ...

1. The size of two bacterial lipases was studied by SDS/PAGE, sedimentation velocity and sedimentation equilibrium to test for possible self-association behaviour. 2. Mr values of selected lipases were obtained from SDS/PAGE and sedimentation-velocity measurements, together with an absolute determination by sedimentation equilibrium 3. The Mr values obtained in a variety of aqueous solvents ind...

The miniature paleocontinent in the region of São Francisco River valley, eastern Brazil, holds record two different glacial epochs. late Cryogenian Jequitaí Formation from Bambuí Group is up to 100 m thick and covers areas mainly central craton. Evidences for sedimentation are beautifully preserved E-W grooves striations, dropstones within fine-grained rocks, a full set diamictites enclosing r...