The theological parameters of a clay suspension can be used to evaluate particle-particle interactions. Although there have been many studies of the rheological behavior of suspensions of reference clays, only few studies were performed with suspensions of mixed clays, and the rheological properties of these suspensions are not yet fully understood. The length-to-width ratio of some soil clays ...

We use kinetic theory and nonlinear continuum simulations to study the collective dynamics in suspensions of self-propelled particles. The stability of aligned suspensions is first analyzed, and we demonstrate that such suspensions are always unstable to fluctuations, a result that generalizes previous predictions by Simha and Ramaswamy. Isotropic suspensions are also considered, and it is show...

General principles of symmetry and conservation are used to construct the hydrodynamic equations for orientationally ordered suspensions of self-propelled particles (SPPs). Without knowledge of the microscopic origins of the ordering or the mechanisms of self-propulsion, we are able to make a number of striking, testable predictions for the properties of these nonequilibrium phases of matter. T...

abundant in the spleen, the system we have described is absent from that organ in the mouse and has so far been found only in the liver. This finding agrees with the results of tissue-slice experiments. The stability of fl-glucuronidase to storage, to acetone precipitation and to armmonium sulphate fractionation is also in marked contrast with the above results. A purified spleen P-glucuronidas...

In microswimmer suspensions locomotion necessarily generates fluid motion, and it is known that such flows can lead to collective behavior from unbiased swimming. We examine the complementary problem of how chemotaxis is affected by self-generated flows. A kinetic theory coupling run-and-tumble chemotaxis to the flows of collective swimming shows separate branches of chemotactic and hydrodynami...

bioaerosols are the most significant risk for exposed people leads to infectious diseases. this study was aimed at evaluation of physical and microscopic characteristics and submicron particulate filtration efficiency of surgical masks used in hospitals throughout iran. five types of domestic (zist filter, elhamteb and arman masks) and imported (blosom, face masks) surgical masks were tested se...

Since Nagler's discovery" of the hemagglutinin obtained from suspensions of vaccinial lesions on the chorio-allantois, a number of investigators have attempted to characterize it more precisely. Nagler"" and others'"" have shown that antibodies which inhibit vaccinia hemagglutinin (V.H.) develop in man, rabbits, mice, and guinea pigs following infection with vaccinia virus, but it is not known ...

Current non-intrusive measurement techniques for characterising the solids flow in gas-solids suspensions are limited by low temporal or spatial resolution of sample volume, case optical methods, a short range sight. In this work, sub-millimetre wave range-Doppler radar is developed and validated sensing concentrations particle system with known characteristics. The combines favourable features...